HV9910BDB3 Supertex, HV9910BDB3 Datasheet
HV9910BDB3
Related parts for HV9910BDB3
HV9910BDB3 Summary of contents
Page 1
... DC input. The demoboard uses Supertex’s HV9910B Universal LED driver IC to drive a buck converter. The HV9910BDB3 can be configured to operate in either a constant frequency mode (for driving a single LED constant off-time mode (for driving two LEDs). ...
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... Inductor Constant Off-Time Mode V • T O,MAX Δ – LED R CS Maximum Switching Frequency = OFF Δ MAX 1 – V IN,MIN T OFF ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 2 HV9910BDB3 = V IN,MIN = V O,MAX = OFF = Constant Frequency Mode { { V O, MAX V • 1 – O,MAX V IN,MIN Δ • Δl CS ...
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... LD voltage or the sense resistor Why is the efficiency of the demoboard higher with a load of two LEDs compared to a single LED load? Losses in the HV9910BDB3 occur due mainly due to two factors: a. Conduction losses in the FET and diode b. Switching losses in the FET Switching losses are dependent on the switching frequency, input voltage and total parasitic capacitance at the node. ...
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... Typical Results Constant Frequency Mode: The HV9910BDB3 is designed to be operated in the constant frequency mode when the load is a single LED. In this mode, the line regulation of the LED current is less than 2% and full-load efficiency greater than 80%. Efficiency vs. Input Voltage (@ V ...
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... Constant Off-Time Mode: The HV9910BDB3 is designed to be operated in the constant off-time mode when the load is two LEDs in series. In this mode, the line regulation of the LED current is less than 2% and the efficiency greater than 80%. Efficiency vs. Input Voltage (@V = 7.8V Input Voltage (V) Fig. 5. Efficiency vs. Input Voltage Plot Efficiency vs ...
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... The variation in the switching frequency, when the HV9910BDB3 is operated in the constant off-time mode, is shown in Figs. 9 and 10. Switching Frequency vs. Input Voltage (@V =7.8V) O 140 120 100 Input Voltage (V) Fig. 9. Switching Frequency vs. Input Voltage Plot 140 120 100 Fig. 10. Switching Frequency vs. Load Voltage Plot ● ...
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... LED Current Drain Voltage Fig.11. Steady State Waveforms in Constant Frequency Mode C1 (Yellow) : Drain Voltage (10V/div) C4 (Green) : LED Current (200mA/div) Time Base : 5μs/div ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 7 HV9910BDB3 Drain Voltage (b) 12V input Drain Voltage (d) 30V input ● Tel: 408-222-8888 ● www.supertex.com ...
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... Time Scale : PWM Dimming Input : 10μs/div C1 (Yellow) : PWMD Input Voltage (2V/div) C4 (Green) : LED Current (200mA/div) ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 8 HV9910BDB3 500μs/div LED Current PWM Dimming Input (b) PWM Dimming Fall Time Time Scale : 10μs/div ● Tel: 408-222-8888 ● www.supertex.com ...
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... Drain Voltage Fig.13. Steady State Waveforms in Constant Frequency Mode C1 (Yellow) : Drain Voltage (10V/div) C4 (Green) : LED Current (200mA/div) Time Base : 10μs/div ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 9 HV9910BDB3 Drain Voltage (b) 12V input LED Current Drain Voltage (d) 30V input ● Tel: 408-222-8888 ● www.supertex.com ...
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... PWM Dimming Performance Time Scale : 500μs/div : 10μs/div C1 (Yellow) : PWMD Input Voltage (2V/div) C4 (Green) : LED Current (200mA/div) ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 10 HV9910BDB3 PWM Dimming Input LED Current (a) PWM Dimming Fall Time Time Scale : 10μs/div ● Tel: 408-222-8888 ● www.supertex.com ...
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... GND VIN 1 16V 0.1uF, 16V 0.1uF, 16V 2.2uF, 16V 2.2uF, ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 11 HV9910BDB3 ● Tel: 408-222-8888 ● www.supertex.com ...
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... Tech Thru-Hole Molex SMT Coiltronics SOT-23 Vishay SMD0805 - SMD0805 - SMD1206 - SMD0805 - SMT Bourns Inc SMD0805 - SO-8 Supertex 1235 Bordeaux Drive, Sunnyvale, CA 94089 12 HV9910BDB3 Manufacturer’s Part Number EEV-FK1V101P GRM31CR71H225KA88L ECJ-2VB1C104K C2012X7R1C225K B140-13 EDSTL130/02 22-03-2031 DR127-221-R Si2318DS - - - - 3361P-1-502G - HV9910BLG-G Tel: 408-222-8888 www.supertex.com ...