* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Typical Application Diagram
Ground (electricity) wikipedia , lookup
Spark-gap transmitter wikipedia , lookup
Power engineering wikipedia , lookup
Ground loop (electricity) wikipedia , lookup
Mercury-arc valve wikipedia , lookup
Stepper motor wikipedia , lookup
Three-phase electric power wikipedia , lookup
Power inverter wikipedia , lookup
Electrical substation wikipedia , lookup
History of electric power transmission wikipedia , lookup
Electrical ballast wikipedia , lookup
Variable-frequency drive wikipedia , lookup
Distribution management system wikipedia , lookup
Current source wikipedia , lookup
Power MOSFET wikipedia , lookup
Schmitt trigger wikipedia , lookup
Pulse-width modulation wikipedia , lookup
Stray voltage wikipedia , lookup
Voltage regulator wikipedia , lookup
Power electronics wikipedia , lookup
Surge protector wikipedia , lookup
Voltage optimisation wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Alternating current wikipedia , lookup
Current mirror wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Mains electricity wikipedia , lookup
LED Buck/Boost Constant-Current Driver IC QX5278 Summary QX5278 is a buck-boost constant-current LED driver chip, especially suitable for LED light implementations powered by lithium batteries or triple-cell batteries. When the supply voltage is smaller than the break-over voltage of the LED light, QX5278 functions in boost mode; when the supply voltage is higher than the break-over voltage of the LED light, QX5278 functions in buck mode. Main Features Typical Application Diagram Ø Operating voltage:2.4V~5.5V Ø LED current:<500mA Ø LED current determined by external resistor Ø Efficiency:up to 90% Ø Under voltage protection:2.4V Over voltage protection:5V Packaging Current accuracy:±5% Typical Parameter Graphs Ø Integrated Schottky Diode SOP8 Unless otherwise stated, TA = 25 °C Ø Only an external inductor is requierd Ø High Efficiency Applications Ø Low quiescent current: 17uA Lithium-battery powered LED lights Triple-cell battery powered LED lights LED High-power DC-DC Buck Constant-Current Driver IC QX9920 Summary QX9920 is a highly stable and reliable constant-current LED driver with high efficiency. It is especially suited to drive several high power and high luminance LEDs in series.QX9920 uses fixed off-time and peak current control mode and its operating frequency can vary up to 1MHz, which not only reduces the dimensions of inductor, capacitor and PCB but also improves efficiency. The minimum off-time is 620ns and the off-time can be adjusted by changing the external capacitor, and the operating frequency also can be adjusted according to the need of customers. Main Features Typical Application Diagram Ø Wide Range Input Voltage:2.5V to 100V Ø High Efficiency: Up to 90% Ø Maximum Operating Frequency: 1MHz Ø UVLO Voltage: 2.5V Ø Peak Current Sense Voltage: 250mV Ø Adjustable Luminance With PWM Signal Packaging Applied to EN Pin Typical Parameter Graphs Ø Adjustable Off-time SOT23-6 Unless otherwise stated, VDD = 5V, TA = 25 °C Over voltage protection:5V Current accuracy:±5% Applications Ø Integrated Schottky Diode Flat screen display, LED backlight, Bicycle light, LED Ø Only an external inductor is requierd spotlight , Glare flashlight Ø High Efficiency Ø Low quiescent current: 17uA LED 12/24V Buck External MOS Constant-Current Driver IC QX5241 Summary QX5241 is a step-down high-brightness LED constant-current driver with high accuracy. A high-side current-sense resistor adjusts the output current, which minimizes the number of external components while delivering an LED current with ±1% accuracy, and a dedicated PWM input (DIM) makes a wide range of pulsed dimming feasible. A hysteretic control algorithm ensures excellent input-supply rejection and fast response to load transients and PWM dimming. QX5241 features a 20% inductor current ripple and operates up to 1MHz switching frequency. QX5241 is well suited for applications requiring a wide input voltage range from 5.5V to 36V, and Typical Application Diagram Main Features operates over the -20℃ to 85℃ automatic temperature range. Ø Maximum Output Current: 2.5A Ø High Efficiency: 96% Ø High-side Current Sense Ø Maximum Dimming Frequency: 5KHz Ø Hysteretic Control: No Compensation Ø Maximum Operating frequency: 1MHz Packaging Ø High Current Accuracy: Up to ±1% Typical Parameter Graphs Ø Wide input voltage range: 5.5V to 36V SOT23-6 Unless otherwise stated, VDD = 5V, TA = 25 °C Ø Maximum Output Power: 25W Ø 5V, 5mA On-chip Regulator Applications Ø Adjustable Luminance With PWM Signal Flashlights, electric car lights, bicycle lights, automatic car Applied to EN Pin lights, spotlights, LED driver power supply Ø Adjustable Off-time Over voltage protection:5V Current accuracy:±5% Ø Integrated Schottky Diode Ø Only an external inductor is requierd Ø High Efficiency Ø Low quiescent current: 17uA LED Linear Buck Fixed-Output Constant-Current Driver IC QX7135 Summary QX7135 is a constant current regulator for LED driver with low quiescent current and low dropout voltage. The output current ranges from 100mA to 380mA with 10mA step. In addition to LEDs, QX7135 need not other external components to work normally. QX7135 includes Soft-start Circuit, Thermal Protection Circuit, Bandgap Circuit, UVLO Protection and Short Circuit Protection. QX7135 adopts SOT89-3 package. input voltage range from 5.5V to 36V, and operates over the -20℃ to 85℃ automatic temperature range. Main Features Typical Application Diagram Ø Power Supply Voltage: 2.7~5.5V Ø Sink Current: 100mA to 380mA With 10mA Step Ø Current Accuracy: ±5% Ø Thermal Protection: 120 oC Ø Low Dropout Voltage: 150mV at 350mA Packaging Ø Low Voltage Protection: 2.5V Typical Parameter Graphs Ø Soft Start SOT89-3 Unless otherwise stated, VDD = 5V, TA = 25 °C Ø LED Short Circuit Protection Ø Maximum Operating frequency: 1MHz Applications Ø High Current Accuracy: Up to ±1% Flashlight, mobile power supplies, mining lights Ø Wide input voltage range: 5.5V to 36V Ø Maximum Output Power: 25W Ø 5V, 5mA On-chip Regulator Ø Adjustable Luminance With PWM Signal Applied to EN Pin Ø Adjustable Off-time Over voltage protection:5V Current accuracy:±5% Ø Integrated Schottky Diode Ø Only an external inductor is requierd Ø High Efficiency Ø Low quiescent current: 17uA LED High-power DC-DC Buck Constant-Current Driver IC QX5305 Summary QX5305 is a high efficient boost type LED driver IC. It is especially suited to drive several high power and high luminance LEDs in series. QX5305 uses fixed off-time control scheme, and 1MHz switching frequency can be achieved. QX5305 set the off-time by an external capacitor, the minimum off-time is 620ns and the offtime can be adjusted by changing the external capacitor, and the operating frequency also can be adjusted according to the need of customers. QX5305 regulates the current flowing through LEDs to set the luminance of LEDs by changing the external Main Features Typical Application Diagram resistor, on the other hand, the luminance of LEDs also can be regulated by a PWM signal applied to EN pin. input voltage rangeup from 5.5V to 36V, and operates over the -20℃ to 85℃ automatic temperature range. Ø High Efficiency: to 95% Ø Switching Frequency: up to 1MHz Ø Wide Range Input Voltage:3.6V to 100V Ø UVLO Voltage: 2.5V Ø Peak Current Sense Voltage: 250mV Ø Adjustable Luminance With PWM Packaging Signal Applied to EN Pin Typical Parameter Graphs SOT8 Ø Adjustable Off-time Unless otherwise stated, VDD = 5V, TA = 25 °C Ø Internal Current Sampling Applications Leading Edge Blanking Circuit Ø Dropout Voltage: 150mVLED at 350mA LEDLow light cup, Battery-powered light strings, Ø Low Voltage Protection: 2.5V Flatscreen LED backlight, Constant-current charger Ø Soft Start control, High-power LED lighting Ø LED Short Circuit Protection Ø Maximum Operating frequency: 1MHz Ø High Current Accuracy: Up to ±1% Ø Wide input voltage range: 5.5V to 36V Ø Maximum Output Power: 25W Ø 5V, 5mA On-chip Regulator Ø Adjustable Luminance With PWM Signal Applied to EN Pin Ø Adjustable Off-time Over voltage protection:5V Current accuracy:±5% Ø Integrated Schottky Diode Ø Only an external inductor is requierd Ø High Efficiency Ø Low quiescent current: 17uA LED Linear Buck Output-adjustable Constant-Current Driver IC QX7136 Summary QX7136 is a linear constant current LED driver chip. In addition to LEDs, QX7136 also needs the external connection of a NMOS and a resistor to set the LED current from 100mA to 3000mA. QX7136 includes Soft-start Circuit, Thermal Protection Circuit, Bandgap Circuit, UVLO Protection, Short Circuit Protection. When the input voltage is higher, or when the output current is larger, the power consumption of QX7136 is larger, then QX7136 will go into Thermal Protection status to reduce the output current, which can effectively protect the chip from damage caused by overheating when the junction temperature has exceeded 120 oC . Typical Application Diagram QX5305 regulates the current flowing through LEDs to set the luminance of LEDs by changing the external Main Features resistor, on the other hand, the luminance of LEDs also can be regulated by a PWM signal applied to EN pin. Ø Power Supply Voltage: 2.7~5.5V input voltage range from 5.5V to 36V, and operates over the -20℃ to 85℃ automatic temperature range. Ø Extensible Power Supply: Above 400V Ø Sink Current: 100mA~ 3000mA Ø Current Accuracy: ±6% Ø Thermal Protection: 120 oC Ø Low Voltage Protection: 2.5V Packaging Ø Soft-start Ø Adjustable Luminance With PWM SOT89-5 Signal Applied to EN Pin Applications Ø Adjustable Off-time Ø Internal Current Sampling Linear LED lighting driver Leading Edgelamplights, Blankingmining Circuitlights, signal LED flashlights, Ø Low Dropout Voltage: 150mV at 350mA lights Ø Low Voltage Protection: 2.5V Ø Soft Start Ø LED Short Circuit Protection Ø Maximum Operating frequency: 1MHz Ø High Current Accuracy: Up to ±1% Ø Wide input voltage range: 5.5V to 36V Ø Maximum Output Power: 25W Ø 5V, 5mA On-chip Regulator Ø Adjustable Luminance With PWM Signal Applied to EN Pin Ø Adjustable Off-time Over voltage protection:5V Current accuracy:±5% Ø Integrated Schottky Diode Ø Only an external inductor is requierd Typical Parameter Graphs Unless otherwise stated, VDD = 5V, TA = 25 °C LED Two-cell Battery Flashlight Driver IC QX5237 Summary QX5237 is suitable for LED flashlight drivers powered by two dry battery cells. The peripheral circuit of QX5237 boasts a simple design, high efficiency, and only needs an external inductance element to form an LED flashlight driver circuit board. QX5237 is reliable, easily usable and consistent/uniform in production. It can achieve different levels of brightness through the adjustment of the external inductor. QX5305 regulates the current flowing through LEDs to set the luminance of LEDs by changing the external resistor, on the other hand, the luminance of LEDs also can be regulated by a PWM signal applied to EN pin. Application Diagram input voltage range from 5.5V to 36V, and operates over theTypical -20℃ to 85℃ automatic temperature range. Main Features Ø Voltage input range: 1.6V - 3.2V Ø Maximum output current: >100mA Ø High efficiency: up to 80% Ø Only need an external inductor Ø LED driver capability: three to six 20mA LED lights Packaging TO-92 or SOT23 packaging Ø Low Voltage SOT23-3 TO-92 Protection: 2.5V Ø Soft-start Ø Adjustable Luminance With PWM Applications Signal Applied to EN Pin LED flashlights powered by two dry battery cells Ø Adjustable Off-time Ø Internal Current Sampling Leading Edge Blanking Circuit Ø Low Dropout Voltage: 150mV at 350mA Ø Low Voltage Protection: 2.5V Ø Soft Start Ø LED Short Circuit Protection Ø Maximum Operating frequency: 1MHz Ø High Current Accuracy: Up to ±1% Ø Wide input voltage range: 5.5V to 36V Ø Maximum Output Power: 25W Ø 5V, 5mA On-chip Regulator Ø Adjustable Luminance With PWM Signal Applied to EN Pin Ø Adjustable Off-time Over voltage protection:5V Current accuracy:±5% Typical Parameter Graphs Unless otherwise stated, VDD = 5V, TA = 25 °C LED Single-cell Battery Flashlight Driver IC QX5231 Summary QX5231 is suitable for the application of single-cell or two dry battery cells for LED drivers. The peripheral circuit for QX5231 has a simple design and only needs one inductive element to form an LED flashlight driver circuit board. QX5231 is reliable, efficient, has a wide voltage range, is easy to use, and consistent in its production. It can achieve different levels of brightness through the adjustment of the external inductor. QX5231 uses TO-92 and SOT23 packaging. Main Features Typical Application Diagram Ø Voltage input range: 0.9V-3.2V Ø Maximum current output: >100mA Ø High efficiency: up to 85% Ø Only need to add an external inductor Ø LED driver capability: three to six 20mA LED light TO-92 or SOT23 packaging Packaging SOT23-3 Applications LED flashlight driver constant-current supply Typical Parameter Graphs Unless otherwise stated, VDD = 5V, TA = 25 °C High-power LED Flashlight Driver IC QX5235 Summary QX5235 is a ASIC (application-specific integrated circuit) designed specifically for high-power LED lighting installations. The operating voltage of QX5235 is 0.8V - 4.0V, which is most suitably powered by AA or NiMH batteries. QX5235 uses SOT-89-3 packaging. Main Features Typical Application Diagram Ø Operating voltage:0.8V~4.0V Ø Current output:100mA~800mA Ø Effiency:>80% Ø TO-92 or SOT23 packaging Packaging SOT89-3 Applications 1W,3W high-power LED drivers Typical Parameter Graphs Unless otherwise stated, VDD = 5V, TA = 25 °C LED Single-Cell Battery High-Efficiency Flashlight Driver IC QX5236 Summary QX5236 is an ASIC chip designed specifically for the application of single-cell dry battery cell for LED flashlights. The product uses large-scale IC technologies, and only needs an external inductance component to form an LED flashlight driver circuit board. QX5236 has excellent performance, high reliability, easy usability, and good production uniformity. The variety of current amounts needed can be satisfied through the adjustment of the external inductance component. Main Features Ø Voltage input range: 0.9 V -1.5 V Ø Maximum output current: beyond 200mA Ø High efficiency Packaging SOT23-3 TO92 Applications LED flashlights Typical Application Diagram LED Flashlight Controller QX5256 Summary QX5256 is a controller chip designed specifically for LED flashlights, mining lights and headlights. It supports a series of LED lights and is controlled by a switch. QX5256 has two operating modes: under the 1st, the LED light can alternate between "all bright" and "pulsing"; under the 2nd mode, the LED light can go from the "all bright" status to "dim light", which is 1/4 the brightness, and then to "pulsing", and alternate between the three states. The maximum operating current for QX5256 is 200mA. Main Features Ø Operating voltage:2V~6V Ø Operating mode #1:all bright, pulsing Ø Operating mode #2:all bright, dim light, pulsing Ø Maximum LED current:200mA Ø Current expandable to:2A Under voltage protection:2V Packaging SOT23 SOT23-5 TO92 Applications LED flashlights LED mining lights, headlights Typical Application Diagram Low Power PFM DC-DC Boost IC QX2303 Summary The QX2303 Series are PFM step-up DC-DC converters with high efficiency, low ripple and high operation frequency. The QX2303 Series need only four external components to realize step-up conversion from low input battery voltage to the voltage needed, and they are applied to one to four battery- cells application. The QX2303 Series adopt low dissipation and high performance reference circuit, with trimming technique in manufacture, which ensure high precision and low temperature drift of the output voltage. The precision of output voltage precede ±2.5%, and the highest efficiency is 89%. Main Features Typical Application Diagram Ø 300KHz Maximum Operating Frequency Ø 2.5V to 5.0V Output Voltage With 0.1V step Ø Low Start-up Voltage: 0.8V at 1mA Ø ±2.5% Output Voltage Accuracy Ø Up to 89% Efficiency Ø Output Current: 300mA at 2.5V Input, 3.3V Packaging Output voltage Ø Low SOT23-5 Ripple and Low Noise SOT23 SOT89-3 TO-92 Ø Four external components needed only Applications 1-3 dry battery cell electronic equipment, LED flashlights, LED lights, sphygmomanometers, Electronic dictionaries, automobile anti-theft devices, battery chargers, VCR, PDA and other hand-held electronic devices Typical Parameter Graphs Unless otherwise stated, TA = 25 °C, VOUT = 3.3V, CIN = 47uF, COUT = 100uF, L1 = 47uH High-efficiency Low-energy PFM DC-DC Synchronized Step IC QX2304 Summary QX2304 is a high-efficiency, low-power, low-ripple, high operating frequency PFM synchronized boost DC-DC Converter. QX23-4 only needs 3 external components to convert battery voltage boost to the needed output. The voltage output of QX2304 can be adjusted to fit varying load output situations through internal adjustment selections (increment by 0.1V). The voltage output of the QX2304 system produces low ripple and low noise. QX2304 has an internal synchronized power switch tube which lowers the tube damage, allowing up to an efficiency of 95%. QX2304 works in PFM mode, which lowers the damage in light load mode and increases the equipment usage period. Main Features Typical Application Diagram Ø Highest efficiency: 95% Ø Highest operating frequency: 300 KHz Ø Low static current: 15uA Ø Selectable voltage output: 2.5V - 3.6V Ø Output accuracy: 2.5% Ø Output Current: 300mA at 2.5V Input, 3.3V Packaging Output voltage Ø Low SOT23-5 Ripple and Low Noise SOT23 SOT89-3 Ø Four external components needed only Applications 1-2 dry battery cell electronic equipment, LED flashlights, LED lights, sphygmomanometers, Electronic dictionaries, automobile anti-theft devices, battery chargers, VCR, PDA and other hand-held electronic devices Typical Parameter Graphs Unless otherwise stated, TA = 25 °C, CIN = 47uF, COUT = 100uF, L1 = 47uH Synchronized Boost DC/DC Converter QX3400 Summary QX3400 Typical Application Diagram Main Features Ø Converter efficiency: 96% or more Ø Low voltage startup: 0.9V Ø Shutoff current: <1uA Ø Input voltage: 0.9V – 5.0V Ø Output voltage: 2.5V – 5.0V (Schottky diode: 5.2V) Ø Output Current: 300mA at 2.5V Input, 3.3V Packaging Output voltage Ø Low Ripple and Low Noise SOT23-6 Ø Four external components needed only Applications Digital cameras, MP3s, hand-held computers, PDAs, cell phones, carry-on media players, cordless telephones, DSL modem, PC cards Typical Parameter Graphs Unless otherwise stated, TA = 25 °C, C1=C2=22uF, L1=2.2uH Single Signal Light Lithium Battery-Charger Management IC QX4054 Summary QX4504 is a complete single-cell lithium battery constant-current linear charger controller. Only a minimal amount of external components are needed for the application of portable products. QX4504 is designed specifically for USB power source charging. QX4504 can differentiate to operate in one of three modes (trickle charging, constant-current charging, constant-voltage charging) according to different battery voltages. The charging current for trickle charging is 1/10 of the full-charge current; the constant-current charging mode operates at the full-charge current; the constant-voltage charging mode operates at a fixed voltage of 4.2V. Main Features Typical Application Diagram Ø Power source voltage: 4.25V – 6.0V Ø Programmable charging current: highest 800mA Ø Preset 4.2V charging voltage accuracy: 1% Ø Shutoff mode supporting current: 25uA Ø Trickle charging threshold voltage: Ø Output Current: 300mA at 2.5V Input, 3.3V Packaging Output voltage Ø Low Ripple and Low Noise SOT23-5 Ø Four external components needed only Applications Mobile telephones, PDA and other portable devices, lithium-battery-powered chargers, Bluetooth devices Typical Parameter Graphs