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MIC2843

High Efficiency 6-Channel Linear WLED with Ultra Fast PWM Control

Status: In Production

Features:

  • High efficiency (no voltage boost losses)
  • Ultra Fast PWM™ control (200Hz to 500kHz)
  • Input voltage range: 3.0V to 5.5V
  • Dropout of 40mV at 20mA
  • Matching better than ±3% (typical)
  • Current accuracy better than ±1.5% (typical)
  • Maintains proper regulation regardless of how many channels are utilized
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RoHS Information
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Device Overview

Summary

The MIC2843 is a high efficiency linear White LED (WLED) driver designed to drive up to six WLEDs, greatly extending battery life for portable display backlighting keypad backlighting, and camera flash in mobile devices. The MIC2843 provides the highest possible efficiency as this architecture has no switching losses present in traditional charge pumps or inductive boost circuits. The MIC2843 provides six linear drivers which maintain constant current for up to six WLEDs. It features a typical dropout of 40mV at 20mA. This allows the WLEDs to be driven directly from the battery eliminating switching noise/losses present with the use of boost circuitry.

The six channels are matched better than ±3% typical, ensuring uniform display illumination under all conditions. The brightness is controlled through an Ultra Fast PWM™ interface operating down to less than 1% duty cycle.

The MIC2843 operates over a junction temperature range of -40°C to +125°C.

Additional Features
    • High efficiency (no voltage boost losses)
    • Ultra Fast PWM™ control (200Hz to 500kHz)
    • Input voltage range: 3.0V to 5.5V
    • Dropout of 40mV at 20mA
    • Matching better than ±3% (typical)
    • Current accuracy better than ±1.5% (typical)
    • Maintains proper regulation regardless of how many channels are utilized

 

    Parametrics
    Name
    Value
    Topology
    Linear
    +Vin min (V)
    3
    +Vin max (V)
    5.5
    Dimming
    PWM
    Package
    UDFN
    Product Type
    Linear LED Drivers
    # of White LEDs
    6 @ 20mA
    Operating Iq (µA)
    1.4
    ILED Matching
    ±3%
    Θja (C/W)
    90
    Vdropout @ 20mA
    40mV

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    RoHS Information

    Part Number
    Device Weight (g)
    Shipping Weight (Kg)
    Lead Count
    Package Type
    Package Width
    Solder Composition
    JEDEC Indicator
    RoHS
    China EFUP
    MIC2843YMT-TR
    0.007800
    0.551800
    10
    UDFN
    2x2x0.6mm
    NiPdAu
    e4
    MIC2843AYMT-TR
    0.007800
    0.551800
    10
    UDFN
    2x2x0.6mm
    NiPdAu
    e4
    To see a complete listing of RoHS data for this device, please Click here
    Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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