Diodes Incorporated

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White LED Step-Up Converter for Small Panel

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The AP3032 is an inductor-based DC/DC boost converter designed to drive up to 4 rows of °Cs with 7 series for each in parallel for backlight. A constant frequency 1MHz PWM control scheme is employed in this IC, which means tiny external components can be used. Specifically, 1mm tall 6.8μH inductor and 1μF aluminum output capacitor for the typical application is sufficient. The over output voltage protection is equipped in AP3032, which protects the IC under open load condition. The AP3032 includes UVLO, soft-start, stand-by mode, current limiting and OTSD to protect the circuit under over load condition.


  • 7’ to 10’ LCD Panels
  • Digital Photo Frame
  • GPS Receiver
  • Product Specifications

    Product Parameters

    AEC Qualified No
    Compliance (Only Automotive supports PPAP) Standard
    Function Boost LED Driver
    MinimumInput Voltage (V) 2.7 V
    MaximumInput Voltage (V) 9 V
    Maximum Output Voltage (V) 37 V
    Number of Regulated Output Channels 1
    Maximum Output Current per Channel 260 mA
    Typical Overcurrent Protection Current 1400 mA
    Switching Frequency (MHz) 1 MHz
    Efficiency (%) 81 %
    Quiescent Current (µA) 4 mA
    Standby Quiescent Current (µA) 50 µA
    SW RDS(ON) N/A Ω
    Dimming PWM and External DC
    OVP Yes
    Soft Start Yes
    VFB 200 V
    OperatingTemperatureRange  (°C) -40 to 85 °C

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    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2548 2021-10-08 2022-01-08 Additional Wafer Source (JKFAB), New Bill of Materials (BOM) with PdCu Bond Wire, and Assembly/Test (A/T) Site (CAT)