MP6630 2-5.5V Three-Phase Fan Driver QFN-8

MP6630 2-5.5V Three-Phase Fan Driver QFN-8

The MP6630 is a 3-phase, brushless DC motor driver with integrated power MOSFETs for notebook fan drivers.

Key Specifications

Features

• Wide 2V to 5.5V Operating Input Range
• 180° Full-Wave Sine-Wave Control for High Efficiency and Low Speed Vibration
• Embedded Single Hall Sensor to Ensure Robust Start-Up
• Integrated Power MOSFETs
• 0.5s / 5s Rotor Lock and Retry Protection
• 1kHz to 100kHz PWM Input Range
• Direction Input
• 2.6s Soft-Start Time
• Fixed 25kHz Output Switching Frequency
• Output for Speed Indication (FG)

Typical Application Circuit

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