MP6650 3.3-18V BLDC Motor Driver TSOT23

MP6650 3.3-18V BLDC Motor Driver TSOT23

The MP6650 is a single-phase, brushless, DC motor driver with integrated power MOSFETs and a Hall-effect sensor.

Key Specifications

Features

• Embedded Hall Sensor with High Sensitivity
• Wide 3.3V to 18V Operating Input Range
• Up to 2A Configurable Current Limit
• Integrated Power MOSFETs: Total 740mΩ (HS-FET and LS-FET)
• Configurable Speed Curve
• Built-In Adjustable Speed Curve Corner Setting
• Automatic Phase-Lock Detection of Winding BEMF and Current Zero-Crossing
• Soft On/Off Phase Transition
• Rotational Speed Indicator (FG) Signal
• 2kHz to 100kHz PWM Input Frequency Range

Typical Application Circuit

Applications

• CPU Fan for Personal Computers or Servers

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