Control of DPGS Under Grid Faults
... Two requirements can be defined for WTS during grid fault: to remain connected even during severe under-voltage to control reactive power to support the grid voltage ...
... Two requirements can be defined for WTS during grid fault: to remain connected even during severe under-voltage to control reactive power to support the grid voltage ...
Data Sheet Features General Description
... process. This IC consists of voltage reference, Hall sensor, signal amplifier, wave shaping circuit, locked rotor detector, locked rotor protection and restart circuit, output drive circuit, etc.. To allow survival in a harsh environment and in consideration of low cost, the AH9279 has been designed ...
... process. This IC consists of voltage reference, Hall sensor, signal amplifier, wave shaping circuit, locked rotor detector, locked rotor protection and restart circuit, output drive circuit, etc.. To allow survival in a harsh environment and in consideration of low cost, the AH9279 has been designed ...
LM317L 3-Terminal Adjustable Regulator
... current to a low enough level so that there is no need to use a protection diode. The bypass capacitor on the adjustment terminal can discharge through a low current junction. Discharge occurs when either the input or output is shorted. Internal to the LM317L is a 50Ω resistor which limits the peak ...
... current to a low enough level so that there is no need to use a protection diode. The bypass capacitor on the adjustment terminal can discharge through a low current junction. Discharge occurs when either the input or output is shorted. Internal to the LM317L is a 50Ω resistor which limits the peak ...
PDF
... current (BLDC) motor drive as a cost-effective solution for low-power applications. An approach of speed control of the BLDC motor by controlling the dc link voltage of the voltage source inverter (VSI) is used with a single voltage sensor. This facilitates the operation of VSI at fundamental freque ...
... current (BLDC) motor drive as a cost-effective solution for low-power applications. An approach of speed control of the BLDC motor by controlling the dc link voltage of the voltage source inverter (VSI) is used with a single voltage sensor. This facilitates the operation of VSI at fundamental freque ...
Low-Ripple 1.8V/1.6V Spread-Spectrum
... the input voltage is at or below 3.5V (typ.) for 1.8V mode or 3.3V (typ.) for 1.6V mode. At input voltages above 3.5V (typ.) or 3.3V (typ.) for the respective voltage mode selected, the part utilizes a gain of 2/3x, resulting in an input current equal to 2/3 times the load current. The two phases of ...
... the input voltage is at or below 3.5V (typ.) for 1.8V mode or 3.3V (typ.) for 1.6V mode. At input voltages above 3.5V (typ.) or 3.3V (typ.) for the respective voltage mode selected, the part utilizes a gain of 2/3x, resulting in an input current equal to 2/3 times the load current. The two phases of ...
Lecture 9 – Low Power Design
... • Determine the critical path(s) at design time and use low VT devices on the transistors on those paths for speed. Use a high VT on the other logic for leakage control. – A careful assignment of VT’s can reduce the leakage by as much as 80% ...
... • Determine the critical path(s) at design time and use low VT devices on the transistors on those paths for speed. Use a high VT on the other logic for leakage control. – A careful assignment of VT’s can reduce the leakage by as much as 80% ...
Multiple Clock and Voltage Domains for Chip Multi Processors
... need to be placed close to the CMP in order to reduce parasitic resistance and inductance [20] in the power delivery networks (PDN). Power delivery imposes several constraints. The amount of current delivered by each VR is limited. A VR is designed for a certain nominal current; higher current requi ...
... need to be placed close to the CMP in order to reduce parasitic resistance and inductance [20] in the power delivery networks (PDN). Power delivery imposes several constraints. The amount of current delivered by each VR is limited. A VR is designed for a certain nominal current; higher current requi ...
Single Transistor Crystal Oscillator Circuits
... BSV52 work well. It is not recommended to use a BC107 type transistor. The component marked X is a reactance (capacitor and / or inductor) to match the oscillator load capacitance to that of the selected crystal (series, 20pF, 30pF etc.) The component marked Y is for overtone crystals only. It is us ...
... BSV52 work well. It is not recommended to use a BC107 type transistor. The component marked X is a reactance (capacitor and / or inductor) to match the oscillator load capacitance to that of the selected crystal (series, 20pF, 30pF etc.) The component marked Y is for overtone crystals only. It is us ...
TDA1085C Universal Motor Speed Controller
... •Presence of high acceleration ramp VPin 5 > VPin 4 •Distribution occurs in the VPin 4 range (true motor speed) defined by VPin 6 x VPin 4 x 2.0 VPin 6 For two fixed values of VPin 5 and VPin 6, the motor speed will have high acceleration, excluding the time for VPin 4 to go from VPin 6 to two tim ...
... •Presence of high acceleration ramp VPin 5 > VPin 4 •Distribution occurs in the VPin 4 range (true motor speed) defined by VPin 6 x VPin 4 x 2.0 VPin 6 For two fixed values of VPin 5 and VPin 6, the motor speed will have high acceleration, excluding the time for VPin 4 to go from VPin 6 to two tim ...
SP481_83_85, Low Power Half-Duplex RS-485 Transceivers
... operate up to at least 5Mbps. The SP483 receiver is rated for data rates up to 250kbps. The receiver for each of the three devices is equipped with the fail-safe feature. Fail-safe guarantees that the receiver output will be in a HIGH state when the input is left unconnected and floating. ...
... operate up to at least 5Mbps. The SP483 receiver is rated for data rates up to 250kbps. The receiver for each of the three devices is equipped with the fail-safe feature. Fail-safe guarantees that the receiver output will be in a HIGH state when the input is left unconnected and floating. ...
A Single-phase Four-Switch Rectifier with Significantly Reduced
... voltage V+ , to remove the ripple components in iC+ and also to remove the fundamental component in iC− . 1) Regulation of the output voltage V+ : Maintaining a stable output voltage V+ with very small ripples at the desired output reference voltage V+∗ is a major target. The regulation of the sum o ...
... voltage V+ , to remove the ripple components in iC+ and also to remove the fundamental component in iC− . 1) Regulation of the output voltage V+ : Maintaining a stable output voltage V+ with very small ripples at the desired output reference voltage V+∗ is a major target. The regulation of the sum o ...
ADS805 数据资料 dataSheet 下载
... Integrated into the ADS805 is a bandgap reference circuit including logic that provides either a +1V or +2.5V reference output, by simply selecting the corresponding pin-strap configuration. Different reference voltages can be generated by the use of two external resistors, which will set a differen ...
... Integrated into the ADS805 is a bandgap reference circuit including logic that provides either a +1V or +2.5V reference output, by simply selecting the corresponding pin-strap configuration. Different reference voltages can be generated by the use of two external resistors, which will set a differen ...
High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters General Description ____________________________Features
... BATT/Damping Switch (MAX1676) The MAX1676 is designed with an internal damping switch to minimize ringing at LX. The damping switch connects an external resistor (R1) across the inductor when the inductor’s energy is depleted (Figure 2). Normally, when the energy in the inductor is insufficient to s ...
... BATT/Damping Switch (MAX1676) The MAX1676 is designed with an internal damping switch to minimize ringing at LX. The damping switch connects an external resistor (R1) across the inductor when the inductor’s energy is depleted (Figure 2). Normally, when the energy in the inductor is insufficient to s ...
FEATURES DESCRIPTION D
... general-purpose applications. Rail-to-rail input/output make them ideal for driving sampling A/D converters. They are also well-suited for controlling the output power in cell phones. These applications often require high speed and low noise. In addition, the OPA350 series offers a low-cost solution ...
... general-purpose applications. Rail-to-rail input/output make them ideal for driving sampling A/D converters. They are also well-suited for controlling the output power in cell phones. These applications often require high speed and low noise. In addition, the OPA350 series offers a low-cost solution ...
SCAN92LV090 9 Channel Bus LVDS
... There are a few common practices which should be implied when designing PCB for Bus LVDS signaling. Recommended practices are: • Use at least 4 PCB board layer (Bus LVDS signals, ground, power and TTL signals). • Keep drivers and receivers as close to the (Bus LVDS port side) connector as possible. ...
... There are a few common practices which should be implied when designing PCB for Bus LVDS signaling. Recommended practices are: • Use at least 4 PCB board layer (Bus LVDS signals, ground, power and TTL signals). • Keep drivers and receivers as close to the (Bus LVDS port side) connector as possible. ...
AP65552 - Diodes Incorporated
... If the junction temperature of the device reaches the thermal shutdown limit of 160°C, the AP65552 shuts itself off, and both HMOS and LMOS will be turned off. The output is discharged with the internal transistor. When the junction cools to the required level (130°C nominal), the device initiates s ...
... If the junction temperature of the device reaches the thermal shutdown limit of 160°C, the AP65552 shuts itself off, and both HMOS and LMOS will be turned off. The output is discharged with the internal transistor. When the junction cools to the required level (130°C nominal), the device initiates s ...
CNT series Multifunction, Digital Time Delay Relay/Counter
... LCD digital display Universal (24-240VAC/VDC) and fixed input types 10A output relay with DPDT contacts Thumbwheel switches for programming ...
... LCD digital display Universal (24-240VAC/VDC) and fixed input types 10A output relay with DPDT contacts Thumbwheel switches for programming ...
WECC Solar Plant Dynamic Modeling Guidelines
... complex network, and a large set of generators, loads and other dynamic components. The objective is to assess dynamic performance of the system, particularly recovery dynamics following grid-side disturbances such as transmission-level faults. In this context, WECC uses positive-sequence power flow ...
... complex network, and a large set of generators, loads and other dynamic components. The objective is to assess dynamic performance of the system, particularly recovery dynamics following grid-side disturbances such as transmission-level faults. In this context, WECC uses positive-sequence power flow ...
Automotive Power-Management IC with Three Step-Down Converters and Linear Regulator MAX16920 Features
... to operate with input voltages between 5.5V to 28V and survive voltage transients to 45V, making it ideal for automotive applications. The MAX16920 is optimized for high efficiency and low standby current. The MAX16920A features 400kHz switching frequency, while the MAX16920B features 2MHz switching ...
... to operate with input voltages between 5.5V to 28V and survive voltage transients to 45V, making it ideal for automotive applications. The MAX16920 is optimized for high efficiency and low standby current. The MAX16920A features 400kHz switching frequency, while the MAX16920B features 2MHz switching ...
M. Chen, K.K. Afridi, S. Chakraborty, and D.J. Perreault, “A High-Power-Density Wide-Input-Voltage-Range Isolated dc-dc Converter Having a MultiTrack Architecture,” 2015 Energy Conversion Congress and Exposition , pp. 2017-2026, Sept. 2015.
... (whose leakage inductances form Lres1 , Lres2 ), with the output tied to a synchronous full-bridge rectifier (Q1 –Q4 ). The isolation stage has relatively fixed voltage conversion ratio. The system operates in a manner very similar to a conventional series-resonant converter, except that the magneti ...
... (whose leakage inductances form Lres1 , Lres2 ), with the output tied to a synchronous full-bridge rectifier (Q1 –Q4 ). The isolation stage has relatively fixed voltage conversion ratio. The system operates in a manner very similar to a conventional series-resonant converter, except that the magneti ...
Pulse-width modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.