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AIC1843

Features: 1MHz Switching Frequency2.7V to 5.5V Input Voltage RangeLow Shutdown Current: 1mARegulated 20mA Full-Scale Output Current32-Position Linear Scale with Digital ControlHigh Accuracy Brightness Matching33% Less Input Current Than Doubler Charge PumpNo Inductors RequiredBuild-in Soft-StartCu...

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SeekIC No. : 004279110 Detail

AIC1843: Features: 1MHz Switching Frequency2.7V to 5.5V Input Voltage RangeLow Shutdown Current: 1mARegulated 20mA Full-Scale Output Current32-Position Linear Scale with Digital ControlHigh Accuracy Brightne...

AIC1843 Data Sheet

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Part Number:
AIC1843
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/24

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Product Details

Description



Features:

  • 1MHz Switching Frequency
    2.7V to 5.5V Input Voltage Range
    Low Shutdown Current: 1mA
    Regulated 20mA Full-Scale Output Current
    32-Position Linear Scale with Digital Control
    High Accuracy Brightness Matching
    33% Less Input Current Than Doubler Charge Pump
    No Inductors Required
    Build-in Soft-Start
    Current Limit and Over Temperature Protection
    12-Pin DFN Package





    • Application

    Cellular Phones
    PDAs
    Digital Still Cameras
    Handheld Devices
    White LED Backlighting




    Pinout

    TYPICAL APPLICATION
    Connection Diagram





    Description

    The AIC1843 provides 4 LED current source outputs with regulated constant current for uniform intensity. The product is the low noise, constant frequency charge pump DC/DC converter that uses 1.5X conversion to increase efficiency in white LED applications. The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input. Low external parts counts (two 1F flying capacitors and two small bypass capacitors at VIN, and OUT) make the AIC1843 ideal for small, battery-powered applications.
    EN/SET interface is used to enable, disable and set the LED current for a 32 level logic scale LED brightness control. Built-in current limiting, with thermal shutdown provides protection to the product against fault conditions. Automatic soft-start circuitry prevents excessive inrush current during start-up. 1MHz high switching frequency is enable to use tiny external components.
    The AIC1843 is available in a 12-pin thin DFN package.





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