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Littelfuse Training 2014 General Port Protection Application Guides 1 AC / DC Power Applications PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 2 Block Diagram of Power Supply - AC Input and DC Output PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 3 Circuit Protection of AC Input Design Notes: Protection Application: Products that are directly connected to the AC mains (120 to 250VACrms) will be exposed to severe surge transients (lightning, load switching, etc.) and short circuit/overload conditions. Because of this, robust protection devices should be selected. Solution Description: Fuse: A cartridge or leaded fuse (Pico, 5x20mm, 2AG, 3AG, TE5/TR5) can be used for short circuit and overload current conditions. For AC protection, the typical solutions would be 250V-rated 3AG/3AB fuses like the 325/326 series or the 5x20 fuses like the ceramic 215/216. For ratings that are 15A, 16A or 20A, LF now have a smaller footprint 5x20 solution in the 215 series as an option to the 6x32 footprints of 326/325 series. For customers that are used to using the TR/TE platform or in need of a smaller pitch, you could consider the latest TE400 but its interrupt rating is 130A@250Vac only. Radial MOV, TVS Diode OVP: For surge protection, an MOV or TVS Diode should be used. The MOV or TVS Diode should be selected based on the expected severity (energy, voltage and peak pulse current) of the transient surge. The specific family can be determined after the surge severity is understood. Regulatory Issues: Standards will vary depending on the product to be protected. Examples include: MOV Options: CIII, Ultra MOV, LA Series • IEC 61000-4-5 SMD TVS Diode Options: P4SMA,SMAJ,P6SMB, SMBJ,SMC,SMD, SMF 200W, and SDxxC • UL1414 • UL1449 Unique Features: Does not apply. Application Warnings: When selecting the fuse, be sure to consider the expected temperature in the area around the fuse, as well as the in-rush currents. Failure to take these factors into account may result in premature or nuisance tripping of the fuse. Axial Leaded TVS: P4/6/1.5KE, 3KP~30KP, AK1~15 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 4 Circuit Protection of DC Output Design Notes: Protection Application: The DC output of the power supply will experience less severe transient surges than the AC input. For this reason, circuits where added protection is desired, TVS diodes can be used. There will typically be multiple DC circuits, including +3.3V, -5V, +5V, -12V and +12VDC. Solution Description: As shown at the left, a TVS diode can be used to provide additional transient protection on each DC output of the power supply. This will minimize the transient stress on the power components on the respective DC power buses. See Below Companion Solutions: Does not apply. Regulatory Issues: Standards will vary depending on the product to be protected. Examples include: SMD TVS Diode Options: • IEC 61000-4-5 P4SMA,SMAJ,P6SMB, SMBJ,SMC,SMD, SMF 200W, and SDxx • UL1414 Axial Leaded TVS: • UL1449 Unique Features: Does not apply. P4/6/1.5KE, 3KP~30KP, AK1~15 Application Warnings: Does not apply. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 5 Circuit Protection of DC Input Design Notes: Cartridge Fuse: 477 or 505 Series See Below Protection Application: For customers that are using a PFC which changes AC to DC directly in some of the high DC power supply circuits. Solution Description: You would need to consider the 400Vdc 5x20 477 series. For customers that require a significantly higher DC interrupt-rating in industrial or UPS applications. The small footprint 6x32 505 series , with a breaking capacity of 10kA to 30kA@500Vdc for ratings from 16A to 30A, would come in handy as well. The 477 and 505, being 5x20 and 6x32, are smaller footprint options for DC protection. sgs Companion Solutions: NA Regulatory Issues: Standards will vary depending on the product to be protected. Examples include: IEC 61000-4-5 UL1414 UL1449 MOV Options: CIII, Ultra MOV, LA Series Unique Features: The small footprint 6x32 505 series , with a breaking capacity of 10kA to 30kA@500Vdc for ratings from 16A to 30A, would come in handy. The 477 and 505, being 5x20 and 6x32, are smaller footprint SMD TVS Diode Options: P4SMA,SMAJ,P6SMB, SMBJ,SMC,SMD, and SMF 200W, options for DC protection. Axial Leaded TVS: P4/6/1.5KE, 3KP~30KP, AK1~15 Application Warnings: When selecting the fuse, be sure to consider the expected temperature in the area around the fuse, as well as the in-rush currents. Failure to take these factors into account may result in premature or nuisance tripping of the fuse. Road Map Products to be Watching for: None PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 6 Circuit Protection of DC Input Design Notes: Protection Application: For portable devices that include an external AC adapter, a DC voltage (typically in the range of 3.3VDC to 5VDC) will be supplied to the unit. The electrical threats include ESD, low-level lightning surges, and overcurrent conditions (short circuit or overload). Solution Description: As shown at the left, a fuse or PTC can be used for short circuit and overload current conditions. For surge and ESD protection, a discrete diode can be used. Companion Solutions: Other solutions exist in the SPA portfolio such as the SP1007 Series 0402 and 0201 TVS Diodes. Regulatory Issues: For ESD, the IEC 61000-4-2 will be the most appropriate standard, and for lightning immunity the IEC 61000-4-5 may be consulted. Unique Features: The SP1003 has ultra-low leakage of 100nA. The SP1005 is 0201 form factor and capable of 10A of lightning-induced surge (tP=8/20µs). The SDxx Series can handle up to 30A of lightninginduced surge (tP=8/20µs). SMD TVS Diode Array Options: SP1003-01ETG (0402) SP1005-01ETG (0402) SP1005-01WTG (0201) SDxx-01FTG (0805) Application Warnings: None Road Map Products to be Watching for: N/A PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 7 Low Speed Applications PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 8 Circuit Protection of Keypads and Buttons Design Notes: Protection Application: The keypads and various buttons found on a cell phone can be an entry way for ESD. These circuits are low-voltage DC switches, typically less than 5VDC. Solution Description: The examples shown at the left contain four lines for demonstration purposes. The actual number will vary by application. In the top example, discrete diodes are used to provide board layout flexibility. In the bottom example, a single diode array is used to reduce part count. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, diode arrays with different channel counts (2-5 lines) can be used to match the actual conditions of the cell phone. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for these circuits. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: SP1005 is 0201 form factor Road Map Products to be Watching for: None Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=2.5V Channels VRWM Packaging SP1001-04XTG ±15kV 8pF 4 6V SOT553 SP1001-04JTG ±15kV 8pF 4 6V SC70-5 SP1011-04UTG ±15kV 7pF 4 6V µDFN-6 SP1003-01ETG ±25kV 17pF 1 5V SOD882 SP1005-01WTG ±30kV 23pF 1 6V 0201 Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 9 Circuit Protection of Keypads and Switches Design Notes: Protection Application: The keypads and various buttons found various applications can be an entry way for ESD. These circuits are low-voltage DC switches, typically less than 5VDC. V5.5MLA0402 Multilayer Varistor (200pF) Solution Description: The examples shown at the left contain four lines for demonstration purposes. The actual number will vary by application. In this example, discrete multilayer varistors are used to provide board layout flexibility. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, MLV arrays (4 lines) can be used to reduce part count and save board space. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for these circuits. It supplies a test method for verifying that the end product is not susceptible to ESD events. V5.5MLA0402 Unique Features: Does not apply. Application Warnings: Does not apply. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 10 Circuit Protection of Audio Lines Design Notes: Protection Application: For the audio lines, the typical signal has maximum value of 5.5 Vp-p, and has a maximum frequency less than 30kHz. At this frequency, the capacitance of the suppressor does not need to be taken into account. The electrical threat is ESD. Solution Description: As shown at the left, silicon protection arrays or discrete diodes can be used for layout flexibility. Bi-directional devices are shown due to the analog nature of the audio signals. However, if the negative signal does not exceed -0.3V, a unidirectional device may be used. This usually occurs when the analog signal is biased “above” ground or 0V. Companion Solutions: Several unidirectional arrays exist if applicable. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: 0201 form factor, symmetrical BDV Road Map Products to be Watching for: None Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=2.5V Channels VRW Packaging M SP1002-02JTG ±8kV 5pF 2 6V SC70-5 SP1005-01WTG ±30kV 23pF 1 6V 0201 Flipchip SP1007-01WTG ±8kV 3.5pF 1 6V 0201 Flipchip SP1004-04VTG ±8kV 5pF 4 6V SOT953 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 11 Circuit Protection of Video Lines Design Notes: Protection Application: The video signals used in S-video and Composite video formats vary between 0.5 and 2.0Vp-p, with a maximum frequency of 5MHz. At this frequency, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from ESD include Luminance and Chrominance for Svideo, and the single conductor for Composite video. Solution Description: As shown at the left, bi-directional diodes can be used to provide ESD protection to the video lines. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, if the board space usage needs to be minimized, 0201 diodes can be used (SP1005 or SP1007). Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. Application Warnings: The F-type connector shown at the left is specifically for set top box-to-monitor video circuits. If the F-type connector is for CATV or Satellite inputs, then lightning surges become a concern and MLVs cannot be used. In this case, GDTs are required. See the page on CATV and Satellite inputs for more details. Unique Features: The SP1012-05WTG offers 5 channels in an 0402 sized package Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=2.5V Channels VRWM Packaging SP1002-02JTG ±8kV 5pF 2 6V SC70-5 SP1004-04VTG ±8kV 5pF 4 6V SOT953 SP1012-05WTG ±15kV 6.5pF 5 6V Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 12 Circuit Protection of Video Lines V9MLA0402 / V5.5MLA0201 multilayer varistor Design Notes: Protection Application: The video signals used in S-video and Composite video formats vary between 0.5 and 2.0Vp-p, with a maximum frequency of 5MHz. At this frequency, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from ESD include Luminance and Chrominance for Svideo, and the single conductor for Composite video. Solution Description: As shown at the left, discrete multilayer varistors are recommended for protection. Due to the analog nature of the video signals, unipolar TVS diode arrays are not recommended as the may clip the negative part of the video signal. Companion Solutions: Other solutions within the LF MLV portfolio exist in addition to these recommendations. For example, if the manufacturing process cannot handle 0402-size components, devices with the same characteristics can be found in 0603-size components. V9MLA0402 / V5.5MLA0201 multilayer varistor Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: Does not apply. Application Warnings: The F-type connector shown at the left is specifically for set top box-to-monitor video circuits. If the F-type connector is for CATV or Satellite inputs, then lightning surges become a concern and MLVs cannot be used. In this case, GDTs are required. See the page on CATV and Satellite inputs for more details. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 13 Circuit Protection of a Battery Pack Design Notes: Protection Application: The power bus of the battery pack should be protected against an overcurrent runaway condition of the Li-ion cell, as well as from ESD. The control line (e.g. SMBus, I2C, etc.) may also need to be protected against ESD. These are all low voltage (<6VDC) circuits. Solution Description: As shown at the left (top), discrete TVS diodes can be used for layout flexibility with respect to ESD protection. An alternative (left, bottom) is to use a single diode array to save part count. In both cases, the overcurrent solution can be a strap (or SMD) resettable PTC, or an SMD chip fuse. Companion Solutions: Other solutions exist in the SPA portfolio such as the SP100301ETG (0402, SOD882) and SDxx (0805, SOD323) Regulatory Issues: With respect to safety of the battery pack, the following standards supply test methods: UL 1642, UL 2054, IEC 61960, IEC 62133. With respect to ESD, the IEC 61000-4-2 supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: SP1005 is 0201 form factor and capable of 10A of surge (tP=8/20µs) Application Warnings: Care should be taken during the PTC and fuse selection process to ensure the proper performance of the overcurrent device. The key consideration is the expected temperature of the battery pack as this will affect the trip point and trip time of the overcurrent protector. Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=2.5V Channels VRW Packaging M SP1003-01ETG ±25kV 17pF 1 5V SOD882 SP1005-01WTG ±30kV 23pF 1 6V 0201 Flipchip SP0503BAHTG ±30kV 30pF 3 5.5V SOT143 SD05-01FTG ±30kV 300pF 1 5.0V SOD323 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 14 Data Ports and High-Speed Applications/Interfaces PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 15 Circuit Protection of a USB 1.1 Port Design Notes: Protection Application: The data signals used in a USB 1.1 port vary between 0V to +0.48V, with a maximum data rate of 12Mbps. At this data rate, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from ESD include D+ and D-. The 5VDC power bus should be protected against ESD and overcurrent events. Solution Description: As shown at the left, a discrete diode is used on the power bus for ESD protection, and a PTC is used for resettable overcurrent protection. For the data lines, a two-channel silicon protection array can be used for board layout flexibility. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, if the operating current on the power bus is higher or lower, an appropriately rated PTC can be chosen. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=2.5V Channels VRWM Packaging SP1001-02JTG ±15kV 8pF 2 6V SC70-3 SP1001-02XTG ±15kV 8pF 2 6V SOT553 SP1003-01ETG ±30kV 17pF 1 5V SOD882 SP0502BAJTG ±30kV 30pF 2 5.5V SC70-3 SP0502BAHTG ±30kV 30pF 2 5.5V SOT23-3 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 16 Circuit Protection of a USB 1.1 Port Design Notes: Protection Application: The data signals used in a USB 1.1 port vary between -0.5V to +0.5V, with a maximum data rate of 12Mbps. At this data rate, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from ESD include D+ and D-. The 5VDC power bus should be protected against ESD and overcurrent events. Solution Description: As shown at the left, a multilayer varistor is used on the power bus for ESD protect, and a PTC is used for resettable overcurrent protection. For the data lines, discrete multilayer varistors can be used for board layout flexibility, or to reduce part count, a single Diode array can be used. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, if the operating current on the power bus is higher or lower, an appropriately rated PTC can be chosen. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: Does not apply. Application Warnings: Does not apply. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 17 Circuit Protection of a USB 2.0 Port Design Notes: Protection Application: The data signals used in a USB 2.0 port vary between 0V to +0.48V, with a maximum data rate of 480Mbps. At this data rate, the capacitance of the suppressor needs to be minimized. The signal lines to be protected from ESD include D+ and D-. The 5VDC power bus should be protected against ESD and overcurrent events. Solution Description: As shown at the left, a PTC is used for resettable overcurrent protection while the data lines and power bus are protected from ESD with a twochannel diode array (1pF). Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, if the operating current on the power bus is higher or lower, an appropriately rated PTC can be chosen. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: The SP3014-02UTG has the lowest dynamic resistance in the industry today for market leading protection of state of the art IC geometries. Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=1.65V Channels VRWM Packaging SP3014-02UTG ±15kV 1.0pF 2 5V uDFN-6 SP3003-02XTG ±8kV 0.65pF 2 6V SOT553 SP0504SHTG ±12kV 0.85pF 4 6V SOT23-6 SP3030-01ETG ±20kV 0.5pF 1 5V SOD882 SP1003-01ETG ±30kV 17pF 1 5V SOD882 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 18 Circuit Protection of a USB 2.0 Port Design Notes: Protection Application: The data signals used in a USB 2.0 port vary between -0.5V to +0.5V, with a maximum data rate of 480Mbps. At this data rate, the capacitance of the suppressor needs to be minimized. The signal lines to be protected from ESD include D+ and D-. The 5VDC power bus should be protected against ESD and overcurrent events. Solution Description: As shown at the left, a multilayer varistor is used on the power bus for ESD protect, and a PTC is used for resettable overcurrent protection. For the data lines, discrete PulseGuard® suppressors can be used for board layout flexibility, or to reduce part count, a single PulseGuard array can be used. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, if the operating current on the power bus is higher or lower, an appropriately rated PTC can be chosen. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: Does not apply. Application Warnings: Does not apply. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 19 Circuit Protection of a USB 3.0 Port Design Notes: Protection Application: USB3.0 adds two new data pair to the legacy D± pair namely SSTX+, SSTX-, SSRX+, and SSRX-. These new super-speed lines will operate at a maximum data rate of 5Gbps while the old D± will operate at a maximum of 480Mbps. At these data rates, the capacitance needs to be minimized. The signal lines need to be protected from ESD, and the 5VDC power bus should be protected against ESD and overcurrent events. Solution Description: As shown at the upper left, a PTC is used for resettable overcurrent protection while the super-speed data lines are protected with an ultra-low capacitance diode array. Furthermore, another diode array is used for ESD protection of D± as well as the power bus. Companion Solutions: Other solutions within the LF portfolio exist such a fully integrated six channel protection array (lower left) to further minimize part count and simplify the board design. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. Road Map Products to be Watching for: SP3015 Series: Ultra-Low Capacitance (0.3pF) Diode Array Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=1.65V Channels VRWM Packaging SP0524PUTG ±12kV 0.5pF 4 5V µDFN-10 SP3014-02UTG ±15kV 1.0pF 2 5V uDFN-6 SP3012-06UTG ±12kV 0.5pF 6 5V µDFN-14 SP3030-01ETG ±20kV 0.5pF 1 5V SOD882 SP3022-01xTG ±20kV 0.35pF 1 5V SOD882 & 0201 Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 20 Circuit Protection of a USB 3.0 Port USB 3.0 Port 1206L150 V5.5MLA0201 / V5.5MLA0402 Design Notes: VBUS Protection Application: USB3.0 adds two new data pair to the legacy D+/Dpair namely SSTX+, SSTX-, SSRX+, and SSRX-. These new super-speed lines will operate at a maximum data rate of 5Gbps while the old D+/D- will operate at a maximum of 480Mbps. At these data rates, the capacitance of the suppressor needs to be minimized. The signal lines need to be protected from ESD, and the 5VDC power bus should be protected against ESD and overcurrent events. D+ DSSDX+ SSDX SSRX+ SSRX - (6) PGB1010402 / PGB1010603 Signal Ground Solution Description: As shown at the upper left, a PTC is used for resettable overcurrent protection while the super-speed data lines are protected with PulseGuard polymer ESD suppressors. Shield Ground USB 3.0 Port 1206L150 V5.5MLA0201 / V5.5MLA0402 Companion Solutions: Other solutions within the LF portfolio exist such as 0201 PGBs for space constrained applications. VBUS Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. D+ DSSDX+ SSDX - Unique Features: Does not apply. SSRX+ SSRX - Application Warnings: Does not apply. (3) PGB102ST23 Signal Ground Shield Ground PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 21 Circuit Protection of a HDMI Port Design Notes: Protection Application: The data signals used in High Definition Multimedia Interface ports vary between approximately 2.5V and 3.5V, and have a data rate up to 3,400Mbps. The signal lines to be protected from ESD include D0±, D1±, D2±, CLK±. Solution Description: Due to the extremely high rate of data transfer, the capacitance of the ESD suppressor must be minimized. As shown at the left, two ultra-low capacitance (0.5pF) silicon protection arrays can be used. Companion Solutions: Alternatively, combinations of single channel, dual channel, and even six channel devices could be used as needed. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: Ultra-low capacitance, flat over DC bias Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=1.65V Channels VRWM Packaging SP0524PUTG ±12kV 0.5pF 4 5V µDFN-10 SP3014-02UTG ±15kV 1.0pF 2 5V uDFN-6 SP3012-06UTG ±12kV 0.5pF 6 5V µDFN-14 SP3030-01ETG ±20kV 0.5pF 1 5V SOD882 SP3022-01xTG ±20kV 0.35pF 1 5V SOD882 & 0201 Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 22 Circuit Protection of a HDMI Port Design Notes: Protection Application: The data signals used in High Definition Multimedia Interface ports vary between approximately 2.5V and 3.5V, and have a data rate of 1,600Mbps. The signal lines to be protected from ESD include R+, R-, G+, G-, B+, B-, Cl+ and Cl-. PGB1010603 / PGB1010402 Solution Description: Due to the extremely high rate of data transfer, the capacitance of the ESD suppressor must be minimized. As shown at the left, discrete PulseGuard® suppressors can be used for board layout flexibility, or to reduce part count, array versions can be used. Companion Solutions: Does not apply. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: The PulseGuard solution has the industry’s lowest capacitance value. This feature ensures that it will maintain the signal integrity of high-speed data ports. Application Warnings: Does not apply. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 23 Circuit Protection of DisplayPort Design Notes: Protection Application: Each port has a main link which contains 4 differential pairs or lanes (i.e. ML0±, ML1±, ML2±, and ML3±). The total throughput is 10.8Gbps or 2.7Gbps per lane, and the clock signal is embedded in the lanes and does not exist separately as in HDMI There is also an auxiliary channel (AUX±), hot plug detect (HPD), and power pin (PWR). Solution Description: Due to the high rate of data transfer, the capacitance of the ESD suppressor must be minimized. As shown at the left, two ultra-low capacitance (0.5pF) silicon protection arrays can be used. Companion Solutions: Alternatively, combinations of single channel, dual channel, and even six channel devices could be used as needed. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: Ultra-low capacitance, flat over DC bias Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=1.65V Channels VRWM Packaging SP0524PUTG ±12kV 0.5pF 4 5V µDFN-10 SP3014-02UTG ±15kV 1.0pF 2 5V uDFN-6 SP3012-06UTG ±12kV 0.5pF 6 5V µDFN-14 SP3030-01ETG ±20kV 0.5pF 1 5V SOD882 SP3022-01xTG ±20kV 0.35pF 1 5V SOD882 & 0201 Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 24 Circuit Protection of a 1394 Port Design Notes: Protection Application: IEEE 1394 uses a low-voltage differential signaling system operating between 1.20V to 2.00V, with a maximum data rate of 400 Mbps (1394a) to 1,600 Mbps (1394b). At these data rates, the capacitance of the suppressor needs to be minimized. The signal lines to be protected against ESD include TPA±, and TPB±. The 30VDC power bus should be protected against ESD and overcurrent events. Solution Description: As shown at the left, a multilayer varistor is used on the power bus for ESD protection, and a PTC is used for resettable overcurrent protection. For the data lines, SP3003-04 protection array can be used. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, leaded PTCs can be substituted for the SMD versions and several other options exist in the TVS Diode Array portfolio. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Application Warnings: It is recommended that only resettable protection devices like PTCs be used on hot-plug ports like 1394. Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=1.65V Channels VRWM Packaging SP3003-04ATG ±8kV 0.65pF 4 6V MSOP-10 SP0524PUTG ±12kV 0.5pF 4 5V µDFN-10 SP3014-02UTG ±15kV 1.0pF 2 5V uDFN-6 SP3030-01ETG ±20kV 0.5pF 1 5V SOD882 SP3022-01xTG ±20kV 0.35pF 1 5V SOD882 & 0201 Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 25 Circuit Protection of a 1394 Port Design Notes: Protection Application: IEEE 1394 uses a low-voltage differential signaling system operating between 1.20V to 2.00V, with a maximum data rate of 400 Mbps (1394a) to 1,600 Mbps (1394b). At these data rates, the capacitance of the suppressor needs to be minimized. The signal lines to be protected against ESD include TPA+, TPA-, TPB+ and TPB-. The 30VDC power bus should be protected against ESD and overcurrent events. Solution Description: As shown at the left, a multilayer varistor is used on the power bus for ESD protection, and a PTC is used for resettable overcurrent protection. For the data lines, discrete PulseGuard® suppressors can be used for board layout flexibility, or to reduce part count, a single PulseGuard array can be used. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, leaded PTCs can be substituted for the SMD versions, or a TVS diode can be substituted for the MLV. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: Does not apply. Application Warnings: It is recommended that only resettable protection devices like PTCs be used on hot-plug ports like 1394. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 26 Circuit Protection of a eSATA Port Design Notes: Protection Application: eSATA is a subset of the SATA protocol that uses 2 differential pairs for communication. Four lines need to be protected per port (i.e. TX± and RX±), and currently eSATA is capable of running raw data rates of 1.5Gbps (Gen 1) and 3.0Gbps (Gen 2) Solution Description: As shown at the left, a SP0524P TVS Diode Array an be used for ESD protection as that’s the mostly likely threat. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, several other options exist in the TVS Diode Array portfolio and some are included below. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Application Warnings: Does not apply. Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=1.65V Channels VRWM Packaging SP0524PUTG ±12kV 0.5pF 4 5V µDFN-10 SP3014-02UTG ±15kV 1.0pF 2 5V uDFN-6 SP3030-01ETG ±20kV 0.5pF 1 5V SOD882 SP3022-01xTG ±20kV 0.35pF 1 5V SOD882 & 0201 Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 27 Circuit Protection of a CATV/Satellite Input Design Notes: Protection Application: The broadcast signals carried by the CATV and Satellite inputs operate in the radio frequency range. The frequencies extend up to 1,000 MHz for CATV and 2,500 MHz for Satellite. Due to the high frequency nature of these signals, the capacitance of the suppressor must be taken into account to avoid signal attenuation. The electrical threats will be lightning surges and ESD. Solution Description: As shown at the left, a single gas discharge tube is used to protect the input signal line. The specific part number is determined by matching the surge’s peak pulse current value to that of the appropriate GDT. Typical GDT used for CATV: 145V/150V/230V. Regulatory Issues: Since this input is susceptible to lightning transients, standards such as UL 1449 and IEC 61000-4-5 should be consulted for test conditions. Typically, the 8x20s waveform is used. Unique Features: Because of GDT’s low self-capacitance of typ. 0.5 to 1 pF, GDT does not disturb the system even at high frequencies. It is recommended to ground either the shielding or conductor. Application Warnings: PulseGuard® suppressors also have very low capacitance values, but should not be used on this input line. The PulseGuard devices are not robust enough to protect against lightning transients; they are specifically designed for ESD protection. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 28 Circuit Protection of an Antenna Design Notes: Protection Application: The majority of real-time data signals carried by antennas operate at radio frequency levels. As an example, Bluetooth operates at 2.4GHz. Due to the high frequency nature of these signals, the capacitance of the suppressor must be taken into account to avoid signal attenuation. The electrical threat will be ESD. Solution Description: Most all applications will require the ultra-low capacitance of a PulseGuard® suppressor (and higher standoff voltage) to protect the antenna element but some lower voltage applications like Bluetooth, will only require a 5V standoff. Companion Solutions: For FM antennas in smart phones, mobile phones, or MP3 players the SP1007 Series SPA could be used (shown to the left) and for Bluetooth antennas the SP3022 Series can be used. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this circuit. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: 0201 form factor, symmetrical BDV Potential Solutions Ordering Number ESD Level I/O Capacitance @ VR=2.5V Channels VRWM Packaging SP1007-01WTG ±8kV 3.5pF 1 6V 0201 (Flipchip) SP3022-01xTG ±20kV 0.35pF 1 5V SOD882 & 0201 Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 29 Circuit Protection of an Antenna Design Notes: Protection Application: The real-time data signals carried by the antenna operate at radio frequency levels. As an example, Bluetooth operates at 2.4 GHz. Due to the high frequency nature of these signals, the capacitance of the suppressor must be taken into account to avoid signal attenuation. The electrical threat will be ESD. Solution Description: As shown at the left, a single PulseGuard® suppressor is used to protect the antenna element. Companion Solutions: For space-constrained applications, an 0402 or 0201 version is currently available. PGB1010402 / PGB1010603 Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this circuit. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: Does not apply. Application Warnings: Does not apply. Road Map Products to be Watching for: Does not apply PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 30 Circuit Protection of an LCD Module Design Notes: SP6002-04 Protection Application: For typical LCD modules, the data transfer rate is less than 20 Mbps, so protection devices with capacitance values less than 40 pF can be used. The electrical threat is ESD and potentially EMI (Electromagnetic Interference). Solution Description: As shown at the top left, a multi-channel EMI Filter can be sued for ESD protection and filtering of frequencies in the cellular band (800-3000MHz). SP6002-06 Companion Solutions: Other solutions within the Silicon Protection Array portfolio exist. For example, if EMI is not a concern, then any multi-channel silicon protection array can be used or ESD protection (bottom left). Furthermore, if data transfers (e.g. MDDI) take place at high speeds (>1,000 Mbps), then a silicon protection array with low capacitance should be used to maintain signal integrity (i.e. SP300x). Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. Unique Features: SP600x Series integrate between 20-40 components into a single pkg Potential Solutions Ordering Number ESD Level Line Capacitance @ VR=2.5V Channels VRWM Packaging SP6002-04UTG-1 ±30kV 30pF 4 5V µDFN-8 SP6002-06UTG-1 ±30kV 30pF 6 5V µDFN-12 SP6003-04UTG-1 ±12kV 14pF 4 5V µDFN-8 SP6003-06UTG-1 ±12kV 14pF 6 5V µDFN-12 SP1001-04XTG ±15kV 8pF 4 5V SOT553 SP1001-04JTG ±15kV 8pF 4 5V SC70-5 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 31 Circuit Protection of a Touchscreen Design Notes: Protection Application: There are many different types of touchscreens (i.e. resistive, capacitive, optical, etc) and each may require unique protection schemes. The electrical threat is ESD the majority of the time. Solution Description: As shown at the left, a multi-channel array can be used for ESD protection. Companion Solutions: Other solutions within the Silicon Protection Array portfolio exist such as the SP1011-04UTG and the SP1012-05WTG which has the densest form factor in the market today. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. Unique Features: The SP1012 integrates 5 channels of protection in a 0402 sized footprint for space constrained applications found in consumer prodcuts. Potential Solutions Ordering Number ESD Level Line Capacitance @ VR=2.5V Channels VRWM Packaging SP3002-04UTG ±12kV 0.85pF 4 6V µDFN-6 SP1012-05WTG ±15kV 6.5pF 5 6V Flipchip SP3030-01ETG ±20kV 0.5pF 1 5V SOD882 SP3022-01xTG ±20kV 0.35pF 1 5V SOD882 & 0201 Flipchip SP1011-04UTG ±15kV 7pF 4 6V µDFN-6 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 32 Circuit Protection of a Sensor Input Design Notes: Protection Application: The sensor input provides an interface between the patient and the measurement circuits. The electrical threat will be ESD. Solution Description: As shown at the left, a single TVS diode is used to protect the sensor input. Companion Solutions: The SP1005 and SP1007 Series could also be used if a smaller form factor is needed. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this circuit. It supplies a test method for verifying that the end product is not susceptible to ESD events. Unique Features: The SP1003 has ultra-low leakage of 100nA. Application Warnings: None Road Map Products to be Watching for: None Potential Solutions Ordering Number Surge (tP=8/20µs) ESD Level I/O Capacitance @ VR=2.5V Channels VRWM Packaging SP1003-01ETG 7A ±25kV 17pF 1 5V SOD882 SP1005-01WTG 10A ±30kV 23pF 1 6V 0201 Flipchip SP1005-01ETG 8A ±30kV 23pF 1 6V SOD882 SP1007-01WTG 2A ±8kV 3.5pF 1 6V 0201 Flipchip SP1007-01ETG 2A ±8kV 3.5pF 1 6V SOD882 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 33 Circuit Protection of a RS-232 Port Design Notes: Protection Application: The signals used in an RS-232 port can vary between ±24V (MAX), but typically the signal swing is limited to ±12V with a maximum data rate of 256kbps. Since this is a low-speed system, the capacitance of the suppressor is not a concern. The signal lines to be protected from ESD include RD, TD, RTS, CTS and sometimes DSR and DTR as well. Solution Description: As shown at the left, a SM15 diode array can be used for signal swings of 15V, but for higher voltage implementations the SM24 or SM36 can be considered. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, if the signal swing is only between +5V and GND most any SPA would be acceptable (example 2x SP0503BAHTG). Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to ESD events. Potential Solutions Ordering Number Surge (tP=8/20µs) ESD Level I/O Capacitance Channels VRWM Packaging SM15-02HTG 17A ±30kV 75pF 1 15V SOT23-3 SM24-02HTG 7A ±30kV 65pF 1 24V SOT23-3 SP724AHTG 3A ±8kV 3pF 4 20V SOT23-6 SP725ABTG 14A ±8kV 5pF 4 30V SOIC-8 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 34 Circuit Protection of a RS-232 Port Design Notes: Protection Application: The RS-232 standard (also known as RS-232-C) allows signals up to -±24, but many applications will only drive to +5 volts and ground. The maximum data rate is 20kbps. Since this is a low-speed system, the capacitance of the suppress is not a concern. The signal lines to be protected from ESD and lightning induced surges for inter-building type applications include RD (receive data), TD (transmit data), RTS (Request To Send), CTS (Clear To Send), DSR (Data Set Ready) and DTR (Data Terminal Ready). This interface is also known as a V.24 or V.28 port. Solution Description: As shown at the left, the Q12A/SAMC SIDACtor devices can be used for intra-building applications while the Q22C/SCMC would be used for high exposure environment applications. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, if the signal voltages will be limited in the range from -5V to +5V, then an MLV with a lower operating voltage can be chosen. Potential Solutions Regulatory Issues: The IEC 61000-4-5 for outdoor applications will be the most appropriate standard that applies for this port. It supplies a test method for verifying that the end product is not susceptible to lightning induced surge events.GR-1089 and ITU K.20 or K.21 may also apply. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 35 Circuit Protection of a RS-485 Port Design Notes: Protection Application: The maximum bus voltage for a RS-485 link is +12V and -7 V with a maximum data rate of 10 Mbps. Since this is a relatively low-speed system, the protection load capacitance is not a relative concern. The signal lines to be protected from the three threats identified below are the A & B signal lines. Solution Description: As shown at the bottom left, three discrete SIDACtor devices (P0300Q22L) in either QFN packages or DO-214 packages can be used for a minimum PCB footprint solution when surge is the primary threat. The SM712-02HTG shown at the upper left was designed specifically for RS-485 consisting of 2 channels with a 12V and 7V standoff voltage in the positive and negative direction, respectively, and should be used when ESD and low level surge is the primary threat. Regulatory Issues: The IEC 61000-4-2 (ESD Immunity), 4-4 (EFT Immunity), & 4-5 (surge immunity) are the three most common standards that a RS-485 interface must withstand. Unique Features: SIDACtor crowbarring technology. Companion Solutions: P0300Q12AL, P0300SAL PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 36 Circuit Protection of a CAN/LIN Bus Design Notes: Protection Application: Most applications involve two wires (i.e. CANH and CANL) and depending on cable length, data rates can vary from 10kbps1Mbps The common mode voltage can differ in the particular application from -2V to 7V or up to -12V to 12V. The latter case is shown to the left where we assume the full signal swing is 24V. Solution Description: The SM24CANA and SM24CANB can withstand up to 24V in either direction (i.e. bidirectional) and should be used for ESD and low level surge suppression. Regulatory Issues: The IEC 61000-4-2 (ESD Immunity), 4-4 (EFT Immunity), & 4-5 (surge immunity) are the most common standards that will apply and both products are AEC-Q101 qualified for automotive applications. Unique Features: Does not apply. Companion Solutions: Discrete options like the SDxx and SDxxC Series can be considered as alternatives and are also AEC-Q101 qualified. Potential Solutions Ordering Number Surge (tP=8/20µs) ESD Level I/O Capacitance Channels VRWM Packaging SM24CANA-02HTG 3A ±24kV 11pF 2 24V SOT23-3 SM24CANB-02HTG 10A ±30kV 30pF 2 24V SOT23-3 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 37 Circuit Protection of a SIM or µSIM Socket Design Notes: Protection Application: The SIM (Subscriber Identification Module) card has 3 data lines that are medium-speed and low-voltage. Given the low speed of the signals, the capacitance is not a major concern. Solution Description: The SP1011 and SP1012 are ideal form factors for this socket measuring 1.25x1mm and 0.94x0.6mm, respectively. Regulatory Issues: The IEC 61000-4-2 (ESD Immunity) is the main focus as the biggest threat is ESD from the removal and replacing of SIM cards. Unique Features: Does not apply. Companion Solutions: Other solutions and form factors in the TVS Diode Array portfolio exist. Potential Solutions Ordering Number ESD Level Line Capacitance @ VR=2.5V Channels VRWM Packaging SP1011-04UTG ±15kV 7pF 4 6V µDFN-6 SP1012-05WTG ±15kV 6.5pF 5 6V Flipchip SP3022-01xTG ±20kV 0.35pF 1 5V SOD882 & 0201 Flipchip PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 38 Telecommunication Applications/Interfaces PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 39 Central Office (CO) Block Diagram Overview Notes: Central Office (CO) : This connects the Public Switched Telephone Network (PSTN) to the customer through a SLIC function. This CO also connects the customer to the internet via the VDSL2/ADSL2 transceiver unit. This CO Site could be a Remote Terminal (RT) located in a neighborhood or it could be a building location up to 18,000 feet away. The further a customer is from this CO function, the lower the xDSL rate will be. LF has solutions targeted for the SLIC, Transceiver Units and the splitter at this CO location. A CO will also contain T1/E1/J1 trunks, which LF presents solutions for also. Remote Site = Customer Premises Equipment (CPE): The customer premises in this diagram shows the Plain Old Telephone Service (POTS), better known as voice services, along with xDSL services. A splitter function will also be located at the CP site. LF has solutions for the POTS interface, the splitter, and the xDSL transceiver unit. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 40 POTS Circuit Protection Design Notes: P3100 and TeleLink fuse Protection Application: POTS interfaces such as telephones, fax machines, and 56k modems need protection from lightning induced surges. Solution Description: Generally this interface will require the P3100 or P3500 due to battery voltage and ringing signals. In some applications, lower threshold devices may be appropriate. Companion Solutions: The “A” rated version may be used if a PPTC is placed out front instead of the TeleLink fuse. These solutions are available in QFN, DO-214, and TO-92 packages. Regulatory Issues: The most typical requirement for POTS type interfaces is TIA-968-B and CS03, which is the Canadian version of TIA-968. This was formerly known as FCC Part 68. The ITU K.21 Recommendation would be applicable for non- N.A. applications while the YD/T 1082 would apply for Mainland China. Verizon requirements for CPE are more robust for this interface so a “C” rated solution is required. Many of these applications will also be UL listed for safety so UL 60950-1 will apply for N.A. Potential Solutions Road Map Products to be Watching for: Does not apply PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 41 POTS Circuit Protection P3100Sx and P0640Sx This could be an analog modem interface, telephone interface, or a fax machine interface application. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 42 ADSL2/VDSL2 Circuit Protection Inter-building (per GR-1089) Protection Scheme Design Notes: SDP3100Q38CB and TeleLink PPTC Protection Application: The VDSL2/ADSL2 broadband signals can extend up to a 30 MHz bandwidth; therefore, capacitance loading is very important in these applications. VDSL2 can have signals as high as 29 volts p-p that are superimposed on battery voltage and ringing voltage for a combination POTS/DSL service line. Therefore, a high threshold SIDACtor device is typically selected.. Solution Description: The SDP3100Q38CB is a biased solution that does NOT interfere with the DSL signaling scheme and avoids the inter-modulation distortion issues for most solid-state solutions offered in this slot. A low off-state resistance PPTC can be used preceding it for ITU K.20 and K.21 Recommendations.. Regulatory Issues: These xDSL ports and protection scheme should comply with the Inter-building requirements of GR-1089 for N.A. applications. Internationally, the application should comply with ITU K.20 or K.21 Recommendation and in Mainland China with YD/T 993 or YD/T 950 or YD/T 1082. The UL/IEC/EN 60950-1 standards will generally demand the need for the TeleLink or PTC. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 43 ADSL2/VDSL2 Circuit Protection Intra-building (per GR-1089) Protection Scheme Design Notes: Protection Application: The VDSL2/ADSL2 broadband signals can extend up to a 30 MHz bandwidth; therefore, capacitance loading is very important in these applications. VDSL2 can have signals as high as 29 volts p-p that are superimposed on battery voltage and ringing voltage for a combination POTS/DSL service line. Therefore, a high threshold SIDACtor device is typically selected.. Solution Description: The SDP3100Q38CB is a biased solution that does NOT interfere with the DSL signaling scheme and avoids the inter-modulation distortion issues for most solid-state solutions offered in this slot. A low off-state resistance PPTC can be used preceding it for ITU K.20 and K.21 Recommendations.. Regulatory Issues: These xDSL ports and protection scheme should comply with the Intra-building requirements of GR-1089 for N.A. applications. Internationally, the application should comply with ITU K.20 or K.21 Recommendation and in Mainland China with YD/T 993 or YD/T 950 or YD/T 1082. The UL/IEC/EN 60950-1 standards will generally demand the need for the TeleLink or PTC. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 44 DSL Splitter Circuit Protection P3100Q12B/SB, P0300SA/Q12A and TeleLink Fuse Design Notes: Protection Application: This circuit provides a high pass filter design for the CPE side of an ADSL application. It provides isolation between the voice channel of the POTS line and the data channel intended for the ADSL modem. Solution Description: The P3100Q38B is a non-biased solution but is compatible with many lower rate DSL services or DSL services with very short reach requirements. A low off-state resistance PPTC can be used preceding it for ITU K.20 and K.21 Recommendations.. Regulatory Issues: These xDSL splitters should comply with the Intrabuilding or the Inter-building requirements of GR-1089 for N.A. applications. Internationally, the application should comply with ITU K.20 or K.21 Recommendation and in Mainland China with YD/T 993 or YD/T 950 or YD/T 1082. The UL/IEC/EN 60950-1 standards will generally demand the need for the TeleLink or PTC. Potential Solutions Ordering Number VS @ 100V/us (VMAX) VRDM @ IDRM=5uA (VMIN) P0300SCLRP 40 25 P0300SAMCLRP 40 25 P3100SBLRP 350 275 P3500SBLRP 400 320 P0300Q12BLRP 40 25 P0300Q12ALRP 40 25 P3100Q12BLRP 350 275 P3500Q12BLRP 400 320 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 45 SLIC/FXO/FXS VoIP Overview Overview Notes: VoIP: A VoIP (voice over IP) application will utilize a SLIC function to provide the analog interface to the telephone, an Ethernet port for data and/or digitized voice connections to specialized data phones, and an FXO (Foreign eXchange Office) port to interface with the Public Switched Telephone Network (PSTN) In CPE, the FXS circuit is located in the gateway. This specific block diagram includes the FXO port, which provides lifeline support, call congestion handling (if the packet network via the Ethernet port is not available), and remote VoIP dialing (i.e. receiving calls through the analog PSTN port and forwarding them to the VoIP network). Not all VoIP applications will contain an FXO port. Some rely solely on the packet network connection via the Ethernet port. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 46 SLIC Circuit Protection Design Notes: Protection Application: The SLIC chipset provides the dial tone, battery voltage, ringing voltages, and other interfacing functions between the end user and the telcom network. Many variants of SLIC chipsets are offered in the market place. . P0721DF-1E and 600R150 PPTC Solution Description: This is a fixed voltage protector that does NOT require an additional capacitor as the programmable protectors require. The surge rating of this device is lower than the programmable devices; therefore, it is generally used with a leading PTC device and is intended mainly for intrabuilding applications. Companion Solutions:.Pxxx1DF-1, Pxxx1UAL/UCL, Pxxx1Q22CL, Pxxx1CA2L, Pxxx1SAL/SCL, Regulatory Issues: These SLIC ports should comply with the Intra-building or the Inter-building requirements of GR-1089 for N.A. applications. Internationally, the application should comply with ITU K.20 or K.21 Recommendation and in Mainland China with YD/T 993 or YD/T 950 or YD/T 1082. The UL/IEC/EN 60950-1 standards will generally demand the need for the TeleLink or PTC. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 47 SLIC Circuit Protection Design Notes: B1101UCL and TeleLink Fuse Protection Application: The SLIC chipset provides the dial tone, battery voltage, ringing voltages, and other interfacing functions between the end user and the telcom network. Many variants of SLIC chipsets are offered in the market place. . Solution Description: This dual-channel ProSLIC chipset is a self-ringing SLIC, which means it internally generates the ringing signal. The OVP solution shown will track with the reference voltage of this self-ringing SLIC. This solution also includes the integrated diode for positive surge protection. Companion Solutions: B1101UC4 (one package instead of two packages as shown to the left), 600R150 PPTC, Regular TeleLink fuse, B1xxCAL/CCL.. Regulatory Issues: These SLIC ports should comply with the Intra-building or the Inter-building requirements of GR-1089 for N.A. applications. Internationally, the application should comply with ITU K.20 or K.21 Recommendation and in Mainland China with YD/T 993 or YD/T 950 or YD/T 1082. The UL/IEC/EN 60950-1 standards will generally demand the need for the TeleLink or PTC. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 48 SLIC Circuit Protection B1101UC4L and Enhanced TeleLink Fuse Design Notes: Protection Application: The SLIC chipset provides the dial tone, battery voltage, ringing voltages, and other interfacing functions between the end user and the telcom network. Many variants of SLIC chipsets are offered in the market place. . Solution Description: This is a two chipset self-ringing SLIC. The OVP solution shown will track with the reference voltage of this self-ringing SLIC. A single protection package for two SLIC chipsets results in a lower cost since only one reference capacitor is required. This solution also includes the integrated diode. Companion Solutions: B1101UC (two packages instead of a single package solution as shown to the left, which may offer more PCB layout options), 600R150 PPTC, Regular TeleLink fuse, B1xxxCAL/CCL(but extra diode needed). Regulatory Issues: These SLIC ports should comply with the Intra-building or the Inter-building requirements of GR-1089 for N.A. applications. Internationally, the application should comply with ITU K.20 or K.21 Recommendation and in Mainland China with YD/T 993 or YD/T 950 or YD/T 1082. The UL/IEC/EN 60950-1 standards will generally demand the need for the TeleLink or PTC. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 49 SLIC LCAS Circuit Protection P0641SAL, A1220UAL and TeleLink Fuse Design Notes: Protection Application: The SLIC chipset provides the dial tone, battery voltage, ringing voltages, and other interfacing functions between the end user and the telcom network. The LCAS provides the ringing signal so that a self-ringing SLIC is not required. Solution Description: This is a fixed voltage protector that does NOT require an additional capacitor as the programmable protectors require. It also includes an asymmetrical SIDACtor device to protect the LCAS relay (.different turn on voltages tip to ground then ring to ground). Companion Solutions:.Pxxx1DF-1E, Pxxx1DF-1, Pxxx1UAL/UCL, Pxxx1Q22CL, Pxxx1CA2L, Pxxx1SCL, 600R150. Regulatory Issues: These SLIC ports should comply with the Intra-building or the Inter-building requirements of GR-1089 for N.A. applications. Internationally, the application should comply with ITU K.20 or K.21 Recommendation and in Mainland China with YD/T 993 or YD/T 950 or YD/T 1082. The UL/IEC/EN 60950-1 standards will generally demand the need for the TeleLink or PTC. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 50 DS-1 Overview Overview Notes: DS-1: The DS-1 interface is known as a T1 trunk line in N.A., as a J1 trunk line in Japan, and as an E1 trunk line in the remaining parts of the globe. This is a four-wire system with a TX pair and a RX pair used for data rates up to 1.544 Mbps for nonE1 and 2.058 Mbps for E1 and J1 trunk lines. The signaling voltage is typically 2.4 volts to 3.6 volts but due to imbalances in the line, signal reflections can occur, which could cause the signals to be as high as 12 volts. This sets the minimum threshold for the protection devices. However, for systems that are repeatered (regenerator term is actually the correct term), phantom powering is used. This is normally ± 130 volts; therefore, the minimum turn-on for OVP needs to be much higher. Furthermore, TIA-968-A (soon to be TIA-968-B) requires an insulation barrier, so any OVP connected longitudinally (common mode) must have a stand-off voltage greater than 169 volts. The P1800 series fits this perfectly. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 51 DS1 (T1/E1/J1) Trunk Circuit Protection P0080Q12AL, P3206UCL and the TeleLink Fuse Design Notes: Protection Application: A DS1 port has several nomenclatures used in the telcom industry. The T1 trunk is a 1.544 Mbps baseband connection used in North America, while the E1 is a 2.0 Mbps connection used in the rest of the world except for Japan, where the term is J1. The data signal is very low but IF a regenerator system is used, then higher threshold surge suppression is required. Solution Description: The line side of this port will require a robust solution while the chip-side can implement lower surge rated protection. The TeleLink fuse is compatible with this baseband signaling scheme and is necessary for the application to comply with power fault conditions. P1800SDL and the PPTC Companion Solutions:.A2106UCL, P2106UCL, P1800Q22CL, P0640Q22CL, 600R150, P1800SDL Regulatory Issues: N.A. ports will typically need to comply with GR-1089 (Issue 6), TIA-968-B in some cases, and UL 60950-1. European and other non-Mainland China installations will need to comply with ITU K.20 and IEC 609501. Mainland China installations will need to comply with YD/T 1082 or YD/T 950. ports Some customers may ask for compliance to he IEC 61000-4-5. P1800Q22C, SP03-6 and the PPTC PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 52 DS3 (T3/E3/J3) Trunk Circuit Protection Design Notes: P0642SAL and Fuse Protection Application: The signals used in an DS3 application are low but the data rate is 45 Mbps. Therefore a low capacitance protection solution is needed for these applications . Solution Description: A DS3 interface is typically an intra-building application, so the “A” rated device will suffice. The entire list of “A” devices shown in the possible solutions below are also available in a “B” rating for more robust surge requirements. Regulatory Issues: For intra-building applications, the GR-1089 intra-building requirements, ITU K.20 or K.21 Basic Recommendations apply. . From a safety perspective, UL/EN/IEC 60950-1 would apply. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 53 DS3/DS4/DS5 (Tx/Ex/Jx) Trunk Circuit Protection Design Notes: LC03 (x2), SP3051, and the TeleLink Fuse Protection Application: T-carrier infers NA and South KR while Ecarrier infers Europe and J-carrier for Japan. DS2 = T2 (6Mbps), E2 (8Mbps), J2 (6Mbps) DS3 = T3 (44Mbps), E3 (34Mbps), J3 (32Mbps) DS4 = T4 (274Mbps), E4 (139Mbps), J4 (97Mbps) DS5 = T5 (400Mbps), E5 (565Mbps), J5 (565Mbps) The data rates go up with each successive version and hence the importance of using lower capacitance solutions. Solution Description: The line side of this port will require a robust solution while the chip-side can implement lower surge rated protection. The key is to use lower capacitance devices like the LC03 and SP3051 TVS Diode Arrays. The TeleLink fuse is compatible with this baseband signaling scheme and is necessary for the application to comply with power fault conditions. Potential Solutions Ordering Number Surge (tP=8/20µs) ESD Level I/O Capacitance Lines VRWM Packaging LC03-3.3BTG 150A ±30kV 4.5pF 2 3.3V SOIC-8 SP3051-04HTG 20A ±30kV 3.5pF 4 6V SOT23-6 SP2504NUTG 20A ±30kV 2pF 4 2.5V uDFN-10 SP3304NUTG 20A ±30kV 2pF 4 3.3V uDFN-10 PROTECT CONTROL SENSE Companion Solutions: Many other solutions/combinations exist in the diode array portfolio, and SIDACtor devices can be used on the line side for outdoor applications where a 500A surge immunity is required. Regulatory Issues: N.A. ports will typically need to comply with GR-1089 (Issue 6), TIA-968-B in some cases, and UL 60950-1. European and other non-Mainland China installations will need to comply with ITU K.20 and IEC 60950-1. Mainland China installations will need to comply with YD/T 1082 or YD/T 950. ports Some customers may ask for compliance to he IEC 610004-5. Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 54 HDSL Overview Overview Notes: HDSL: A High-bit Digital Subscriber Line (HDSL) transceiver is a common replacement for T1 trunk lines because the HDSL needs ONLY two lines to accomplish what T1 trunks do over four lines. It is a 1.544 Mbps baseband connection used in North America with less crosstalk issues for nearby bundled cables. The data signal is very low but IF a regenerator system is used, then higher threshold surge suppression is required. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 55 HDSL Trunk Circuit Protection P2300Q22 and the TeleLink Fuse Design Notes: Protection Application: A HDSL trunk is a 1.544 Mbps baseband connection used in North America. The data signal is very low but the power for the repeaters can be as high as ±190 volts. IF a regenerator system is used, then higher threshold surge suppression is required. Solution Description: The line side of this port will require a robust solution while the chip-side can implement lower surge rated protection. The TeleLink fuse is compatible with this baseband signaling scheme and is necessary for the application to comply with power fault conditions. Regulatory Issues: N.A. ports will typically need to comply with GR-1089 (Issue 6 soon to be released), TIA-968-B in some cases, and UL 60950-1. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 56 Cell Site Block Diagram Potential Solutions oAK6 or AK10 Series o DC Power to radio heads oSEP series o Protection of xDSL or T/E/J Carrier oP1800’s o Protection of xDSL, T/E/J Carrier, POTS oGDTs o Protection of xDSL, POTS o Diode Arrays o Ethernet, T/E/J Carrier Or Ethernet PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 57 Ethernet Applications PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 58 Ethernet (10/100/1000BaseT) Overview Overview Notes: 10Base-T Ethernet: Ethernet is a Local Area Network (LAN) that was standardized as IEEE 802.3. There are four dominant forms in the marketplace today with more on the horizon. These are 10Base-T, 100Base-T, 1000Base-T, and 10GBase-T (Base stands for Baseband signaling, T stands for twisted pair, 10 = 10 Mbps, 100 = 100 Mbps, 100 = 1000 Mbps, 10G = 10Gbps). All the standards use UTP (Unshielded Twisted Pair) wiring or cabling such as CAT5, CAT5e, CAT6, and CAT7. Ethernet connections are typically made with a RJ45 type connector, which is also known as the IEC 60603-7 8P8C modular connector. The main difference between the four forms of Ethernet is the speed (see table at right). In general, the signaling scheme became more complex to achieve the higher data rates. Figure 2 shows the differences in eye diagrams between a 100Base-T and 1000Base-T signal. The 10Base-T eye diagram was omitted since it is a simpler, two-level signal. With this basic understanding of Ethernet we will now move into an introduction of Power-over-Ethernet which can be used in conjunction with any of the aforementioned standards. Data Rate 10 Mbps Symbol Rate 20Mbaud with 0.5bits/baud 2 pairs out of the 4 available are used (1 for transmit and 1 for receive) Differential (i.e. 2 levels) 4B5B NRZ Manchester (four bits are scrambled and sent as a 5 bit sequence) CAT3 or higher up to 100M Data Pairs Signaling Encoding Cabling 100Base-T (also known as Fast Ethernet) Data Rate 100 Mbps Symbol Rate 125Mbaud with 0.8bits/baud 2 pairs out of the 4 available are used (one pair for transmit and one pair for receive) Differential with MLT-3 (Multi Level Transition) 4B5B NRZ Manchester (four bits are scrambled and sent as a 5 bit sequence) CAT5 or higher up to 100M Data Pairs Signaling Encoding Cabling 1000Base-T 100Base-TX 1000Base-Tx Data Rate 1000 Mbps Symbol Rate 125Mbaud with 2bits/baud Data Pairs 4 pairs (full duplex) each pair carries 250 Mbps Signaling Differential PAM-5 (Pulse Amplitude Modulation five-level) signaling Encoding 8B/10B Cabling Preferably CAT5e or higher up to 100M 10GBase-T (10GbE) Data Rate 10 Gbps Symbol Rate 800M symbols/s Data Pairs Encoding 4 pairs (full duplex) Differential PAM-16 (Pulse Amplitude Modulation sixteen-level) signaling with CRC-8 DSQ128 (yields 3.5 bits per symbol) Cabling Preferably CAT6 up to 55M or CAT6A/7 up to 100M Signaling PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 59 Power-over-Ethernet (PoE) Overview Overview Notes: PoE is a powering technique used over the existing Ethernet wiring link. IEEE standard 802.3af specifies the technical requirements so that systems are compatible with one another. The IEEE 802.3at specification provides the guidelines for PoE+, which is a higher power level than the original PoE. Both of these specifications allow the Ethernet wiring to carry both data and DC power. This removes the need for a local ac power port for each individual Ethernet interface. PoE can also provide a continuous power source thus supporting life-line capabilities for IP enabled telephones such as may be seen in EFM (Ethernet in the First Mile) or IEEE 802.3ah or Active Ethernet applications. This is also known as Ethernet to the Home (ETTH). Life-line in this case meaning that the telephone is not dependent on a local power supply, so that it functions during local power outages. EFM needs this capability in order to provide life-line service to residential locations so PoE is an ideal implementation for EFM applications. Here are two major advantages for PoE: --Ethernet devices are not required to be placed next to wall outlets and reduces the need for “wall-warts” --Power cables are no longer required to be laid out for the network This power can be inserted from (1) an endpoint PSE or (2) a midspan PSE. The legacy Ethernet systems most likely use a mid-span PSE method. For new installations, the endpoint PSE is the most economical and easiest installation choice. Power can be provided in one of two ways over CAT5e, CAT6, or CAT7 cable: Mode A Mode A power is applied over the “active” data pair found in 10BaseT or 100BaseTX interfaces. In these type systems, two pair are used for data delivery (RJ-45 pins: 1-2 and 3-6) and two pair are unused (pairs 4-5 and 7-8). This is shown in Figure 3 below. PoE uses the “phantom powering” technique so that a single pair carries a zero DC volt potential difference. The two center tap connections provide access to the DC power and the DC voltage across any single pair (i.e. 1-2 or 3-6) remains at zero volts. This scheme helps to prevent accidental shock hazards when single pairs are handled. Mode B Mode B power is applied over the unused pair (pairs 4-5 and 7-8) for 10BaseT and 100BaseT interfaces. This is shown in Figure 4 below. For 1000BaseT and 10GbE applications, all wire pairs are used for data transfer, therefore there are no “spare pairs” available. So a 1000BaseT and 10GbE system may use either Mode A or Mode B power but the 4-5 and 7-8 pair would be center tap connected instead of directly connected. Mode B can be used with any Ethernet application as can Mode A. The PD end must be compatible with both Mode A and Mode B since its final application is not known. The PSE defines the Mode type, therefore it provides power in a single mode only; it cannot provide power in both Mode A and Mode B simultaneously. Over the same pair used for data signaling in 10BaseT and 100BaseT systems, or over the unused pair in 10BaseT and 100BaseT systems. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 60 Circuit Protection of an Ethernet Port ESD Only (Short LAN Connections) Design Notes: Protection Application: The data signals used in an Ethernet port vary between 1.0V (1000Base-T and 100Base-TX) to 2.5V (10Base-T), with maximum data rates of 1000Mbps, 100Mbps and 10Mbps, respectively. At these data rates, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from ESD include Tx± and Rx±. SP0504SHTG Solution Description: As shown at the left, a diode array can be used to protect the data lines of the Ethernet port from ESD. Companion Solutions: Other solutions within the LF portfolio exist such as other potential four channel silicon protection arrays (listed below). Alternatively, if the design engineer knows that no additional capacitance can be added to the system, the PulseGuard® suppressor family can be consulted. Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. Application Warnings: The protection scheme is only for Ethernet ports that connect to a LAN and will only be exposed to ESD. If the Ethernet network will include access to the outside of the building, then more stringent standards apply to take into account lightning surges. Please see the following slides. Potential Solutions Note: For 1GbE (1000Base-Tx) the protection scheme should replicated for the other 4 lines. Ordering Number ESD Level I/O Capacitance @ VR=1.65V Lines VRWM Packaging SP0504SHTG ±12kV 0.85pF 4 6V SOT23-6 SP3002-04JTG ±12kV 0.85pF 4 6V SC70-6 SP3004-04XTG ±12kV 0.85pF 4 6V SOT563 SRV05-4HTG ±20kV 2.0pF 4 6V SOT23-6 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 61 Circuit Protection of an Ethernet Port ESD, EFT, and Low Level Lightning (Indoor Short Haul) Design Notes: Protection Application: The data signals used in an Ethernet port vary between 1.0V (1000Base-T and 100Base-TX) to 2.5V (10Base-T), with maximum data rates of 1000Mbps, 100Mbps and 10Mbps, respectively. At these data rates, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from ESD include Tx± and Rx±. SRV05-4HTG Solution Description: As shown at the left, a diode array can be used to protect the data lines of the Ethernet port from ESD, EFT, and low level surges due to short wiring. Companion Solutions: Other solutions within the LF portfolio exist such as other potential four channel silicon protection arrays (listed below). Regulatory Issues: The IEC 61000-4-2 will be the most appropriate standard that applies for this port. Application Warnings: The protection scheme is only for Ethernet ports that connect to a LAN and will only be exposed to ESD, EFT, and low level surges. If the Ethernet network will include access to the outside of the building, then more stringent standards apply to take into account lightning surges. Please see the following slides. Potential Solutions Note: For 1GbE (1000Base-Tx) the protection scheme should replicated for the other 4 lines. Ordering Number Surge (tP=8/20µs) ESD Level I/O Capacitance Lines VRWM Packaging SRV05-4HTG 10A ±20kV 2pF 4 6V SOT23-6 SP3051-04HTG 20A ±30kV 3.5pF 4 6V SOT23-6 SP2504NUTG 20A ±30kV 2pF 4 2.5V uDFN-10 SP3304NUTG 20A ±30kV 2pF 4 3.3V uDFN-10 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 62 Circuit Protection of an Ethernet Port Lightning, ESD, EFT, CDE, Power Fault (Indoor Long-Haul) Design Notes: Protection Application: The data signals used in an Ethernet port vary between 1.0V (1000Base-T and 100Base-TX) to 2.5V (10Base-T), with maximum data rates of 1000Mbps, 100Mbps and 10Mbps, respectively. At these data rates, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from lightning include Tx± and Rx±. LC03-xBTG, SP3051-04HTG, Telelink Fuse Solution Description: As shown at the left, Telelink fuses are used for overcurrent protection for each data line. The LC03x diode array can be used for primary protection of the Ethernet port from lightning per the GR-1089 intrabuilding standard (100A, 2/10µs). Additionally, the SP3051, a low capacitance diode array, is used for secondary protection to suppress any letthrough energy that gets coupled through the transformer. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations. For example, if PoE or PoE+ is being used, the SEP Series (shown on the following slide) could be in place of the LC03. Regulatory Issues: Many standards could apply depending upon the end equipment usage such as GR-1089 or the IEC61000-4-5. Please consult Littelfuse for additional application support. Potential Solutions Note: For 1GbE (1000Base-Tx) the protection scheme should replicated for the other 4 lines. Ordering Number Surge (tP=8/20µs) ESD Level I/O Capacitance Lines VRWM Packaging LC03-3.3BTG 150A ±30kV 4.5pF 2 3.3V SOIC-8 SP03-6BTG 150A ±30kV 8pF 2 6V SOIC-8 SP3051-04HTG 20A ±30kV 3.5pF 4 6V SOT23-6 SP2504NUTG 20A ±30kV 2pF 4 2.5V uDFN-10 SP3304NUTG 20A ±30kV 2pF 4 3.3V uDFN-10 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 63 Circuit Protection of an Ethernet Port Lightning, ESD, EFT, CDE, Power Fault (Outdoor Long-Haul) Design Notes: SEP0640Q38CB, SP3304NUTG, Telelink Fuse Protection Application: The data signals used in an Ethernet port vary between 1.0V (1000Base-T and 100Base-TX) to 2.5V (10Base-T), with maximum data rates of 1000Mbps, 100Mbps and 10Mbps, respectively. At these data rates, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from lightning include Tx± and Rx±. Solution Description: As shown at the left, Telelink fuses are used for overcurrent protection for each data line, and the SEP series SIDACtor can be used for primary protection from lightning per the GR-1089 inter-building standard (500A, 2/10µs). The SEP064 has a working or standoff voltage of 58V allowing it be used in PoE and PoE+ applications. Last, a low capacitance diode array is used for secondary protection to suppress any let-through energy. A 3.3V device is shown but there also 2.5 or even 5V options to match the PHY. Companion Solutions: Other solutions within the LF portfolio exist in addition to these recommendations such as the SEP008 series. This lower voltage option can lower the clamping voltages in applications that do not need the higher standoff voltage due to PoE and PoE+ applications. Regulatory Issues: Many standards could apply depending upon the end equipment usage such as GR-1089 or the IEC61000-4-5. Please consult Littelfuse for application support. Note: For 1GbE (1000Base-Tx) the protection scheme should replicated for the other 4 lines. Potential Solutions Ordering Number Surge (tP=2/10µs) I/O Capacitance @ VR=0V Lines VRWM Packaging SEP0640Q38CB 500A See datasheet 2 58V QFN (5x6mm) SEP0080Q38CB 500A See datasheet 2 6V QFN (5x6mm) SP3304NUTG 20A 2pF 4 3.3V uDFN-10 SP2504NUTG 20A 2pF 4 2.5V uDFN-10 PROTECT SP3051-04HTG CONTROL 20A SENSE Confidential and Proprietary 4to Littelfuse.6VLittelfuse, Inc.6V © 2014 3.5pF 64 Circuit Protection of an Ethernet Port Lightning, ESD, EFT, CDE, Power Fault (General or Basic Protection) Design Notes: Protection Application: The data signals used in an Ethernet port vary between 1.0V (1000Base-T and 100Base-TX) to 2.5V (10Base-T), with maximum data rates of 1000Mbps, 100Mbps and 10Mbps, respectively. At these data rates, the capacitance of the suppressor needs to be taken into account. The signal lines to be protected from lightning include Tx± and Rx±. SLVU2.8-4BTG Solution Description: As shown at the left, the customer may decide to forego primary protection and depend on the transformer to act as a “buffer” to the incoming surge. For lightning protection, a low capacitance diode array is used on the secondary side to suppress any let-through energy that gets coupled through the transformer. This solution would need to be verified during testing since various transformers will allow different amounts of energy to be coupled through to the PHY. Also note, that the SLVU2.8-4BTG will only protect against differential surge events or transients. The other devices listed below would protect against differential and common mode events assuming the GND pin is connected to PHY GND. Companion Solutions: Other solutions within the LF portfolio exist some of which are shown below. Regulatory Issues: Many standards could apply depending upon the end equipment usage such as GR-1089 or the IEC61000-4-5. Please consult Littelfuse for application support. Note: For 1GbE (1000Base-Tx) the protection scheme should replicated for the other 4 lines. Potential Solutions Ordering Number Surge (tP=8/20µs) I/O Capacitance @ VR=0V Channels VRWM Packaging SLVU2.8-4BTG 40A 4.0pF 4 2.8V SOIC-8 SP4060-08ATG 20A 4.4pF 8 2.5V MSOP-10 SP4065-08ATG 20A 4.4pF 8 3.3V MSOP-10 PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 65 Circuit Protection of Power-over-Ethernet (PoE) Design Notes: SEP0640Q38CB and TeleLink Fuse Protection Application: Power over Ethernet (PoE) requires additional protection for the power supply. PoE can be supplied via Mode A (signal pair 2 & 3) or Mode B (signal pair 1 & 4). Since the Powered Device (PD) must be capable of accepting either Mode, a protection solution for both modes is the most cost effective solution. Solution Description: The SEP0640Q38CB is used in a very unique manner for the PoE protection. Pins 2 & 7 must be connected together via PCB layout for this implementation. In this very specific case, the biasing pins are NOT used for biasing purposes but rather for connections to the Power supply leads being protected. The TeleLink is used to comply with UL 60950-1 safety requirements. Regulatory Issues: Depending on where this Ethernet port is located (Base Station Site, CP, CO, etc) the applicable standards can range from IEEE 802.3 at/af, GR-1089, IEC 61000-4-2, 4-4, 4-5, ITU K.20 or K.21 and the Mainland China Specifications YD/T 950, YD/T 1082, or YD/T 993EC 61000-4-2 will be the most appropriate standard that applies for this port. From a safety perspective, UL/EN/IEC 60950-1 would apply. Potential Solutions PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 66 Circuit Protection of Power-over-Ethernet (PoE) Powered Device End (PD) and at the Power Supply End (PSE) Design Notes: Protection Application: Power over Ethernet (PoE) requires additional protection for the power supply. PoE can be supplied via Mode A (signal pair 2 & 3) or Mode B (signal pair 1 & 4). Since the Powered Device (PD) must be capable of accepting either Mode, a protection solution for both modes is the most cost effective solution. This top solution shows a diode bridge combined with the SMAJ58A as one solution choice. Solution Description: The SMAJ58A is used in the typical manner for power supply protection i. The TeleLink should be added so the application complies with UL 60950-1 safety requirements. Both the PD and PSE end should include protection. Regulatory Issues: Depending on where this Ethernet port is located (Base Station Site, CP, CO, etc) the applicable standards can range from IEEE 802.3 at/af, GR-1089, IEC 61000-4-2, 4-4, 4-5, ITU K.20 or K.21 and the Mainland China Specifications YD/T 950, YD/T 1082, or YD/T 993EC 61000-4-2 will be the most appropriate standard that applies for this port. From a safety perspective, UL/EN/IEC 60950-1 would apply. Potential Solutions SMAJ/SMBJ/SMCJ/SMDJ family with standoff greater than PoE voltage level that is typically 48V, but could be higher. PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 67 Common Thyristor Applications PROTECT CONTROL SENSE Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 68 Gas Igniters using Sidacs and High Energy Sidacs Design Notes: Sidac for Gas Igniter Circuit Application: Sidac devices are used as switch on device for Igniter Circuits. Operation Note: The resistor is usually chosen to achieve spark at interval of 100 – 250 mili second, or 4 to 10Hz. Solution Description: For a voltage exceeding the Sidac breakover voltage point, the Sidac switches on through a negative resistance region to a low on-state voltage. Conduction continues until the current is interrupted or drops below the minimum holding current of the device. K2400G is commonly used for Gas Grills, Stove Range Top, and Fire Place Starter applications. K2400GH Companion Solutions: K2400GH is new Sidac for high energy ignition systems where firing capacitor is 2 to 3µF instead of 1.2µF Multi-Spark Gap Outputs for Stove Range Top Regulatory Issues: N/A Unique Features: Circuit Initiated by push button switch. Potential Solutions Ordering Number Mains Input K2400G Application Warnings: N/A. Firing Capacitance Spark Outputs Output Packaging 230 VAC 1.2µF 1 10KV TO-92 K2400SHRP 230 VAC 2.2µF 4 10KV SMT, DO-214 K2400GH 230 VAC 3µF 4 10KV TO-92 PROTECT CONTROL SENSE Road Map Products to Watch for: Unidirectional Sidac Series Kxx00xHU Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 69 Tankless Water Heater Controller using Thyristors Back to Back SCRs for High Amperage Circuit Design Notes: S8065J TO-218X SCRs Application: Back to Back Power SCRs allow full wave switching of 92Amps RMS at 50 to 60Hz. DC Temperature Comparator Circuit using NTC sensor Solution Description: Solid State Switching for long term reliability. Use of Opto-coupler driver allows total electrical isolation between DC temperature comparator control circuit and AC high power circuit. Zero Cross conduction gives burst control eliminating in RFI from high AC switching. Each half cycle is turned on and off at zero crossing. S8065J SCRs are for highest wattage tankless Water Heater applications. Pin 3 Not Used Companion Solutions: 40Amp Alternistor Triacs could be used for lower amperage applications instead of Back to Back SCRs Zero Crossing Opto-Coupler for Burst Control Regulatory Issues: UL Recognized Packaged Thyristors for Heat Sinking per UL1557 Potential Solutions Ordering Number Mains Input Possible Opto Isolator System Type Output Packaging S8065J 230 VAC MOC3083 Total Bathroom Hot Water Control 16KW TO-218X Q8040J7 230 VAC MOC3083 Shower only 7.2KW TO-218X PROTECT CONTROL SENSE Unique Features: TO-218X devices have robust eyelet terminals for best soldered connections. Application Warnings: N/A. Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014 70