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MP6638 2.5-16V, 1.7A Sensorless BLDC Motor Driver QFN-8
MP6638 2.5-16V, 1.7A Sensorless BLDC Motor Driver QFN-8

MP6638 2.5-16V, 1.7A Sensorless BLDC Motor Driver QFN-8

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pMPS MP6638 — Sensorless BLDC Motor Driver, 2.5-16V input, 1.7 A output, QFN-8./p
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    MP6638 2.5-16V, 1.7A Sensorless BLDC Motor Driver QFN-8

    The MPS MP6638 is a Sensorless BLDC Motor Driver. It operates from a 2.5 V to 16 V input and is rated for 1.7 A. It is supplied in a QFN-8 package.

    The MP6638 is a three-phase sensorless, brushless DC (BLDC) motor driver with integrated power MOSFETs.

    Key Specifications

    Part NumberMP6638
    FunctionSensorless BLDC Motor Driver
    Input Voltage2.5 V to 16 V
    Current Rating1.7 A
    InterfacePWM
    PackageQFN-8
    Ordering CodesMP6638, MP6638GRPU-0000-Z

    Features

    • 2.5V to 16V Input Voltage (VCC) Operating Range
    • Up to 1.7A Peak Phase Current
    • Up to 1.2A Root Mean Square (RMS) Phase Current
    • Sinusoidal Sensorless Control
    • Integrated 330mΩ High-Side MOSFETs (HS-FETs) and Low-Side MOSFETs (LS- FETs)
    • Supports 50Hz to 100kHz Pulse-Width Modulation (PWM) Input
    • Power-Save Mode
    • 30kHz PWM Output Frequency
    • Direction Control
    • Selectable 1x, 1/2x, 1/3x FG or RD Output

    Typical Application Circuit

    MP6638 typical application circuit
    MP6638 typical application circuit, as published in the MPS datasheet.

    Applications

    • Gaming Fans
    • Notebook 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 MP6638 support?
    2.5 V to 16 V. The rated output is 1.7 A.
    Which package and ordering codes apply to the MP6638?
    QFN-8; order codes include MP6638, MP6638GRPU-0000-Z.
    What are the defining features of the MP6638?
    2.5V to 16V Input Voltage (VCC) Operating Range Up to 1.7A Peak Phase Current

    Shenzhen Gaorunxin Technology Co., Ltd

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