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HV9931

Part Number	HV9931
Manufacturer	Supertex
Description	UNITY POWER FACTOR LED LAMP DRIVER
Published	Jan 12, 2009
Detailed Description	HV9931 Initial Release HV9931 Unity Power Factor LED Lamp Driver Features Constant Output Current Large Step-Down Ratio...
Datasheet	HV9931 PDF File

Overview

HV9931 Initial Release HV9931 Unity Power Factor LED Lamp Driver Features Constant Output Current Large Step-Down Ratio Unity Power Factor Low Input Current Harmonic Distortion Fixed Frequency or Fixed Off-Time Operation Internal 450V Linear Regulator Input and output current sensing com Input Current limit Enable, PWM and Phase Dimming General Description The HV9931 is a ﬁxed frequency PWM controller IC designed to control an LED lamp driver using a single-stage PFC buckboost-buck topology.
It can achieve a unity power factor and a very high step-down ratio that enables driving a single high-brightness LED from the 85-264VAC input without a need for a power transformer.
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