MP6651 3.3-18V, 2A Single-Phase BLDC Driver SOIC

MP6651 3.3-18V, 2A Single-Phase BLDC Driver SOIC

The MP6651 is a single-phase brushless DC (BLDC) motor driver with integrated power MOSFETs and a Hall-effect sensor.

Key Specifications

Features

• On-Chip Hall Sensor
• Wide 3.3V to 18V Operating Input Voltage (VIN) Range
• 2A Continuous Current with QFN-10 Package
• 1.5A Continuous Current with SOIC-8 SL Package
• Integrated Power MOSFETs
• Configurable Starting Duty Cycle
• Configurable Min Output Duty Cycle
• Configurable Soft-On/Off Commutating Angle (Max: 45°)
• Configurable Hall Offset Angle (Max: ±45°)
• 4-Step Configurable Current Limit

Typical Application Circuit

Applications

• High-Current Cooling Fans
• Personal Computers or CPU 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