GRX Technology Co, Ltd
MP2481 4.5-36V, 1.2A, 1.4MHz White LED Driver MSOP8
MP2481 4.5-36V, 1.2A, 1.4MHz White LED Driver MSOP8

MP2481 4.5-36V, 1.2A, 1.4MHz White LED Driver MSOP8

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pMPS MP2481 — White LED Driver, 4.5-36V input, 1.2 A output, MSOP8./p
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    MP2481 4.5-36V, 1.2A, 1.4MHz White LED Driver MSOP8

    The MPS MP2481 is a White LED Driver. It operates from a 4.5 V to 36 V input, is rated for 1.2 A and switches at 1.4 MHz. It is supplied in a MSOP8 package.

    The MP2481 is a 36V, 1.2A, white LED driver suitable for either step-down or inverting step-up/down applications.

    Key Specifications

    Part NumberMP2481
    FunctionWhite LED Driver
    Input Voltage4.5 V to 36 V
    Current Rating1.2 A
    Switching Frequency1.4 MHz
    InterfacePWM
    Peak Efficiency95%
    PackageMSOP8
    Ordering CodesMP2481

    Features

    • 1.2A Maximum Output Current
    • Unique Step-up/down Operation (Buck- Boost Mode)
    • Wide 4.5V to 36V Operating Input Range for Step-Down Applications (Buck Mode)
    • 0.30Ω Internal Power MOSFET Switch
    • Fixed 1.4MHz Frequency
    • Analog and PWM Dimming
    • 0.2V Reference Voltage
    • Up to 95% Efficiency
    • 5μA Shutdown Mode
    • No minimum LED required

    Typical Application Circuit

    MP2481 typical application circuit
    MP2481 typical application circuit, as published in the MPS datasheet.

    Applications

    • General LED Illuminations
    • LCD Backlight Panels
    • Handheld Computers
    • Automotive Internal Lighting
    • Portable Multimedia Players

    Design Notes

    • Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
    • In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
    • Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
    • Size the inductor and output capacitor for the string current ripple, not the total LED current.

    Common Questions

    What input voltage does the MP2481 support?
    4.5 V to 36 V. The rated output is 1.2 A.
    Which package and ordering codes apply to the MP2481?
    MSOP8; order codes include MP2481.
    What are the defining features of the MP2481?
    1.2A Maximum Output Current Unique Step-up/down Operation (Buck- Boost Mode)

    Shenzhen Gaorunxin Technology Co., Ltd

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    Shenzhen Gaorunxin Technology Co., Ltd

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