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Microchip - 3-Pin Switch-Mode LED Lamp Driver ICs

Numéro de référence HV9921
Description 3-Pin Switch-Mode LED Lamp Driver ICs
Fabricant Microchip 
Logo Microchip 





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HV9921 fiche technique
HV9921/HV9922/HV9923
3-Pin Switch-Mode LED Lamp Driver ICs
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 (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.
2014 Microchip Technology Inc.
DS20005311A-page 1

PagesPages 19
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