MP6637 2.5-5.5V, 1.3A Sensorless BLDC Motor Driver SOT583

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MP6637 2.5-5.5V, 1.3A Sensorless BLDC Motor Driver SOT583

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pMPS MP6637 — Sensorless BLDC Motor Driver, 2.5-5.5V input, 1.3 A output, SOT583./p

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MPS SOT583 Power Management Motor Drivers & Controllers Motor Sensor

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MP6637 2.5-5.5V, 1.3A Sensorless BLDC Motor Driver SOT583

The MPS MP6637 is a Sensorless 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 MP6637 is a three-phase, sensorless, brushless DC (BLDC) motor driver with integrated power MOSFETs.

Key Specifications

Part Number	MP6637
Function	Sensorless BLDC Motor Driver
Input Voltage	2.5 V to 5.5 V
Current Rating	1.3 A
Switching Frequency	30 kHz
Interface	PWM
Package	SOT583
Ordering Codes	MP6637

Features

2.5V to 5.5V Operating Input Voltage (VCC) Range
Up to 1.3A of Peak Phase Current
Sinusoidal Sensorless Control
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 (PSM)
30kHz Switching Frequency (fSW)
Current Limit
Short-Circuit Protection (SCP)
Over-Voltage Protection (OVP)

Typical Application Circuit

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.