|
HV9921 Datasheet, PDF (1/19 Pages) Supertex, Inc – 3-Pin Switch-Mode LED Lamp Driver IC | |||
|
HV9921/HV9922/HV9923
3-Pin Switch-Mode LED Lamp Driver ICs
Features
⢠Constant output current:
- HV9921 â 20mA
- HV9922 â 50mA
- HV9923 â 30mA
⢠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 out-
put current is internally fixed at 20mA for HV9921,
50mA for HV992, and 30mA for HV9923. The peak cur-
rent control scheme provides good regulation of the
output current throughout the universal AC line voltage
range of 85 to 264VAC or DC input voltage of 20 to
400V.
ï£ 2014 Microchip Technology Inc.
DS20005311A-page 1
|
▷ |