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    Text: HV9931 HV9931 Unity Power Factor LED Lamp Driver Features ► ► ► ► ► ► ► ► ► 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


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    HV9931 HV9931 85-264VAC MS-012, DSFP-HV9931 NR042408 PDF