Diodes Incorporated

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4-CH Linear Constant Current Sink With Matching

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The AP2502 is a 4-channel independent linear current sink with low dropout voltage and perfect match between each channel. Each channel can provide 20mA continuous constant current. In application, there is only one 0.1μF ceramic capacitor required, and there is no any EMI and switching noise issue. It is perfect choice for hand-hold portable system especially based on Li-ion/Polymer battery powered display module. The brightness can be control°C and/or adjustable via simple PWM signal applied to EN pin


  • Mobile Phone, Smart Phone, PDA
  • MP3, MP4, PMP
  • Small Size Backlight Module
  • Product Specifications

    Product Parameters

    AEC Qualified No
    Compliance (Only Automotive supports PPAP) Standard
    Function 4-Channel Linear Constant Current Sink
    MinimumInput Voltage (V) 2 V
    MaximumInput Voltage (V) 6 V
    Maximum Output Voltage (V) 6 V
    Number of Regulated Output Channels 4
    Maximum Output Current per Channel 20 mA
    Typical Over-Current Protection Current N/A mA
    Switching Frequency (kHz) No MHz
    Efficiency (%) 97 %
    Quiescent Current (µA) 0.125 mA
    Standby Quiescent Current (µA) 0.1 µA
    SW RDS(ON) N/A Ω
    Dimming PWM
    OVP No
    Soft Start No
    VFB N/A V
    OperatingTemperatureRange  (°C) -40 to 85 °C

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    RoHS CofC

    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-2366 2018-09-19 2018-12-19 Qualification of Additional Bill of Materials (BOM), Fab Source, A/T Site and Top Marking Change on Select Product