Microchip HV9921 Handleiding

Bekijk gratis de handleiding van Microchip HV9921 (19 pagina’s), behorend tot de categorie Niet gecategoriseerd. Deze gids werd als nuttig beoordeeld door 46 mensen en kreeg gemiddeld 4.1 sterren uit 6 reviews. Heb je een vraag over Microchip HV9921 of wil je andere gebruikers van dit product iets vragen? Stel een vraag

 2014 Microchip Technology Inc.DS20005311A-page 1

HV9921/HV9922/HV9923

Features

•Constant output current:

-HV9921 – 20mA

-HV9922 – 50mA

-HV9923 – 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 (T

OFF

) 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.

3-Pin Switch-Mode LED Lamp Driver ICs

Product specificaties