HV9982DB1 Supertex, HV9982DB1 Datasheet
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HV9982DB1
Specifications of HV9982DB1
HV9982DB1 Summary of contents
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... PWM dimming response, making it ideal for LED backlight applications. The HV9982DB1 uses the HV9982 LED driver IC to drive three discontinuous conduction mode boost converters at a 500kHz switching frequency. The clocks of the three channels are phase shifted to provide ripple cancellation at the input and thus reducing the input capacitor requirements ...
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... Table 1 : Truth Table for S1 and PWMD Output LO LO The output will follow PWMD input signal Input DC zero volt corresponds to 100% duty cycle output HI HI Input DC two volt corresponds to 100% duty cycle output 2 HV9982DB1 ...
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... Once the LED string is reconnected, all three channels will turn back on. Short Circuit Protection – Short the output terminals of any one channel using a jumper. All three channels shut down and the IC tries restarting every 1.0ms. Once the short circuit is removed, all three channels come back into regulation. 3 HV9982DB1 ...
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... C4 (Green): Output Current for Channel 1 (100mA/div) Time Scale: 1μs/div C2 (Pink): RAMP waveform (2V/div) C1 (Yellow): Input Voltage (10V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 500μs/div C1 (Yellow): Output Voltage of Channel 1(20V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 20μs/div 4 HV9982DB1 ...
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... C1 (Yellow): Output Voltage of Channel 1(20V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 20ms/div C1 (Yellow): Output Voltage of Channel 1(20V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 20mA/div C1 (Yellow): Output Voltage of Channel 1(20V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 500μs/div 5 HV9982DB1 ...
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... C4 (Green): Output Current for Channel 1 (200mA/div) Ma (Orange): LED String Voltage of Channel 1(20V/div) Time Scale: 200ns/div C1 (Yellow): Output Voltage of Channel 1(20V/div) C4 (Green): Output Current for Channel 1 (200mA/div) Time Scale: 1ms/div C1 (Yellow): Output Voltage of Channel 1(20V/div) C4 (Green): Output Current for Channel 1 (200mA/div) Time Scale: 500μs/div 6 HV9982DB1 ...
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... Output Current for Channel 1 (50mA/div) Time Scale: 500μs/div C1 (Yellow): PWM Dimming Input for Channel 1(5V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 1μs/div C1 (Yellow): PWM Dimming Input for Channel 1(5V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 1μs/div 7 HV9982DB1 ...
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... RAMP voltage (2V/div) C1 (Yellow): External SYNC signal (5V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 1ms/div C2 (Pink): Signal at PWMD1 terminal (2V/div) C3 (Blue): RAMP voltage (2V/div) C1 (Yellow): External SYNC signal (5V/div) C4 (Green): Output Current for Channel 1 (50mA/div) Time Scale: 1ms/div 8 HV9982DB1 ...
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... Fig. 17: Analog Control of PWM Dimming - Measurements 120 100 -20 Circuit Schematic - Part Output Current vs. PWMD Voltage 0.5 1 PWMD Voltage (V) HV9982 9 HV9982DB1 1.5 2 ...
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... Circuit Schematic - Part Circuit Schematic - Part HV9982 HV9982 10 HV9982DB1 ...
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... SMD0805 100kΩ, 1/10W, 1% chip resistor SMD0603 SPDT Gull Wing slide switch SMT Three-channel closed-loop QFN-40 LED Driver 6.176MHz fi xed frequency SMT oscillator (optional) 11 HV9982DB1 Manufacturer Manufacturer’s Part # Keystone 5016 Electronics Murata GRM31CR71H225KA88L EPCOS Inc B32521C1334J Taiyo Yuden EMK107BJ105KA-TR ...