GRX Technology Co, Ltd
MP6637A 2.5-5.5V, 1.3A Sensorless Sinusoidal BLDC Motor Driver SOT583
MP6637A 2.5-5.5V, 1.3A Sensorless Sinusoidal BLDC Motor Driver SOT583

MP6637A 2.5-5.5V, 1.3A Sensorless Sinusoidal BLDC Motor Driver SOT583

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pMPS MP6637A — Sensorless Sinusoidal BLDC Motor Driver, 2.5-5.5V input, 1.3 A output, SOT583./p
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    MP6637A 2.5-5.5V, 1.3A Sensorless Sinusoidal BLDC Motor Driver SOT583

    The MPS MP6637A is a Sensorless Sinusoidal BLDC Motor Driver. It operates from a 2.5 V to 5.5 V input, is rated for 1.3 A and switches at 30 kHz. It is supplied in a SOT583 package.

    The MP6637A is a three-phase, sensorless, brushless DC (BLDC) motor driver with integrated power MOSFETs.

    Key Specifications

    Part NumberMP6637A
    FunctionSensorless Sinusoidal BLDC Motor Driver
    Input Voltage2.5 V to 5.5 V
    Current Rating1.3 A
    Switching Frequency30 kHz
    InterfacePWM
    PackageSOT583
    Ordering CodesMP6637A

    Features

    • 2.5V to 5.5 Input Voltage (VCC) Operating Range
    • Up to 1.3A of Peak Phase Current
    • Up to 0.9A of RMS Phase Current
    • Sinusoidal Sensorless Drive
    • Integrated 350mΩ High-Side MOSFETs (HS FETs) and Low-Side MOSFETs (LS- FETs)
    • Supports 1kHz to 100kHz Pulse-Width Modulation (PWM) Input
    • Power-Save Mode
    • 30kHz Switching Frequency (fSW)
    • Current Limiting
    • Short-Circuit Protection (SCP)

    Typical Application Circuit

    MP6637A typical application circuit
    MP6637A typical application circuit, as published in the MPS datasheet.

    Applications

    • Notebook Fans
    • Gaming Fans

    Design Notes

    • Set dead time to match the external FET turn-off, not the datasheet typical. Too little risks shoot-through, too much distorts the current waveform at low duty cycle.
    • Use a Kelvin connection for the current-sense resistor; shared copper injects switching noise straight into the sense amplifier.
    • The thermal pad is the only heat path for most packages — via-stitch it to a ground plane with at least 9 vias.
    • PWM frequency trades switching loss against current ripple in the motor inductance; 20 kHz keeps the drive out of the audible band.
    • Add a brake or coast path so regeneration during a fast stop does not pump the supply rail.

    Common Questions

    What input voltage does the MP6637A support?
    2.5 V to 5.5 V. The rated output is 1.3 A.
    Which package and ordering codes apply to the MP6637A?
    SOT583; order codes include MP6637A.
    What are the defining features of the MP6637A?
    2.5V to 5.5 Input Voltage (VCC) Operating Range Up to 1.3A of Peak Phase Current

    Shenzhen Gaorunxin Technology Co., Ltd

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    Shenzhen Gaorunxin Technology Co., Ltd

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