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HV9921

Part Number	HV9921
Manufacturer	Microchip
Description	3-Pin Switch-Mode LED Lamp Driver
Published	Jan 8, 2017
Detailed Description	HV9921/HV9922/HV9923 3-Pin Switch-Mode LED Lamp Driver ICs Features • Constant output current: - HV9921 – 20mA - HV9922...
Datasheet	HV9921 PDF File

Overview

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...

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