HV9923
Features
- Constant output current:
- HV9921
- 20m A
- HV9922
- 50m A
- HV9923
- 30m A
- Universal 85
- 264VAC operation
- Fixed off-time buck converter
- Internal 475V power MOSFET
Applications
- Decorative lighting
- Low power lighting fixtures
Description
HV9921/HV9922/HV9923 are pulse-width modulated (PWM), high-efficiency, LED driver control ICs. They allow efficient operation of LED strings from voltage sources ranging up to 400VDC. HV9921/22/23 include an internal high voltage switching MOSFET controlled with fixed off-time (TOFF) of approximately 10μs. The LED string is driven at constant current, thus providing constant light output and enhanced reliability. The output current is internally fixed at 20m A for HV9921, 50m A for HV992, and 30m A for HV9923. The peak current control scheme provides good regulation of the output current throughout the universal AC line voltage range of 85 to 264VAC or DC...
