HV9931 driver equivalent, unity power factor led lamp driver.
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 Re.
Offline LED Lamps and Fixtures Street lamps Traffic Signals Decorative Lighting
Typical Application Circuit
D1
VIN
D4
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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-brightnes.
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