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    首页产品索引HV9931

    HV9931

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    UNITY POWER FACTOR LED LAMP DRIVER

     

    产品信息

    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. This topology allows reducing the filter capacitors and using non-electrolytic capacitors to improve reliability. The HV9931 uses open-loop peak current control to regulate both the input and the output current. This control technique eliminates a need for loop compensation, limits the input inrush current, and is inherently protected from input under-voltage condition.Capacitive isolation protects the LED Lamp from failure of the switching MOSFET.HV9931 provides a low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few kilohertz. The PWM dimming capability enables HV9931 phase control solutions that can work with standard wall dimmers.

      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

      Input current limit

      Enable, PWM and phase dimming

    电路图、引脚图和封装图

    在线购买

    型号制造商描述购买
    HV9931LG-GATSHEATSINK40X40X15MMXCUTT766 立即购买

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