Supertex HV9966
The HV9966 is a current mode control LED driver IC designed to control a boost LED driver in constant frequency mode. The controller uses a peak current-mode control scheme (with programmable slope compensation) and includes an internal transconductance amplifier to accurately control the output current over all line and load conditions. The IC also provides a disconnect switch gate drive output, which can be used to achieve good PWM rise and fall times for the LED current using an external disconnect FET.| Part No. | HV9966 |
|---|---|
| Datasheet | HV9966 Download |
| Manufacturer |  Supertex |
| Description | Boost LED Driver |
| Buy | Stock & Price |
FEATURES
►► ►► ►► ►► Switch mode controller for boost LED driver High output current accuracy Constant frequency operation Hiccup mode protection for both short circuit and open circuit conditions ►► LED wiring fault detection HV9966GENERAL DESCRIPTION
APPLICATIONS
The HV9966 also provides a TTL compatible, low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few kilohertz. The HV9966 includes LED wiring fault detection function which turns off the boost converter and sends a shutdown signal to the external power supply in case the cathode of the LED string (or any tap in the LED string) is shorted to ground. A dedicated power supply input keeps the wiring fault detection circuitry armed even in the absence of the VCC supply. ► RGB or white LED backlighting Typical Boost Application Circuit VBST CIN L1 RIN ZD1 RSC RCS ROVP2 R2 VIN GT VCC CS GND OVP DR R3 Q1 D1 CO ROVP1 R1 CVIN 12V CVCC PWMD FLAG RT HV9966 DUTY COMP VDD R CDD R1 REF DIS FB Q2 RT CC RS RR2 Doc.# DSFP-HV9966 A051412 Supertex inc.
