MAX1576

PRODUCTION

480mA White LED 1x/1.5x/2x Charge Pump for Backlighting and Camera Flash

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • Powers Up to 8 LEDs
    Up to 30mA/LED Drive for Backlight
    Up to 400mA Total Drive for Flash
  • 85% Average Efficiency (PLED / PBATT) Over Li+ Battery Discharge
  • 0.7% Typical LED Current Matching
  • Adaptive 1x/1.5x/2x Mode Switchover
  • Flexible Brightness Control
    Single-Wire, Serial Pulse Interface (5% to 100%)
    2-Bit (3 Levels) Logarithmic Logic
  • Low Input Ripple and EMI
  • Low 0.1µA Shutdown Current
  • 2.7V to 5.5V Supply Voltage Range
  • Soft-Start Limits Inrush Current
  • Output Overvoltage Protection
  • Thermal-Shutdown Protection
  • 24-Pin Thin QFN, 4mm x 4mm Package
    • MAX1576
    480mA White LED 1x/1.5x/2x Charge Pump for Backlighting and Camera Flash
    MAX1576: Typical Application Circuit
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    Documentation

    Data Sheet 1

    Design Note 2

    Technical Articles 2

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    Software Resources

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    Hardware Ecosystem

    Parts Product Life Cycle Description
    LED Drivers 2
    MAX1575
    		Obsolete White LED 1x/1.5x Charge Pump for Main and Sub-Displays
    MAX1582
    		Obsolete High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting
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    Evaluation Kits

    MAX1576EVKIT

    Evaluation Kit for the MAX1576

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    Features and Benefits

  • MAX1576 Powers Up to 4 Main LEDs and 4 Flash LEDs
    EV Kit Powers 4 Main LEDs and 1 Flash LED
  • 85% Average Efficiency (PLED/PBATT) over Li+ Battery Discharge
  • 0.7% Typical LED Current Matching
  • Adaptive 1x/1.5x/2x Mode Switchover
  • Single-Wire Serial Pulse Interface (5% to 100% Brightness) for Main
  • 2.7V to 5.5V Supply Voltage Range
  • 24-Pin (4mm x 4mm) Thin QFN Package
  • Fully Assembled and Tested

    • Product Details

    The MAX1576 evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating the MAX1576 white LED 1x/1.5x/2x charge pump. This MAX1576 EV kit drives four white LEDs for backlighting and uses four flash LED drivers to drive one flash LED at a high current. In addition to the LED driver circuit, the EV kit includes one pulse-generator circuit and momentary pushbutton switches that are used for testing the single-wire serial pulse-dimming and flash feature of the MAX1576.

    Applications

    • Camera Phones
    • Cell Phones/Smartphones
    • LCD Backlights
    • LED Camera Flashes
    • PDAs, Digital Cameras, and Camcorders
    MAX1576EVKIT
    Evaluation Kit for the MAX1576

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