Monolithic Power Systems

MP6532 Three-Phase Brushless DC Motor Pre-Driver

MPS' MP6532 5 V to 60 V, three-phase brushless DC motor pre-driver

Image of MPS' MP6532 Three-Phase Brushless DC Motor Pre-DriverMonolithic Power Systems' MP6532 is a gate driver IC designed for three-phase brushless DC motor driver applications. It is capable of driving three half-bridges consisting of six N-channel power MOSFETs up to 60 V.

The MP6532 uses a bootstrap capacitor to generate a supply voltage for the high-side MOSFET driver. An internal trickle-charge circuit maintains sufficient gate driver voltage at 100% duty cycle.

Internal safety features include programmable over-current protection, a motor start-up current limit, adjustable dead-time control, UVLO, and thermal shutdown.

The device has three Hall-element inputs spaced at 120°, which determine commutation logic. The PWM, DIR, and nBRAKE inputs are used to control motor speed, direction, and brake engagement.

The MP6532 is available in a 28-contact 4 mm x 4 mm QFN with an exposed thermal pad.

Features
  • Wide 5 V to 60 V input voltage range
  • Hall signal interface
  • Bootstrap gate driver with trickle-charge circuit supports 100% duty cycle operation
  • Low-power sleep mode for battery-powered applications
  • Programmable over-current protection of external MOSFETs
  • Thermally enhanced surface-mount package
  • Adjustable dead-time control to prevent shoot-through
  • PWM speed-control input
  • Brake input
  • Motor start-up current limit
  • Thermal shutdown and UVLO protection
  • Fault indication output
Applications
  • Three-phase brushless DC motors and permanent magnet synchronous motors
  • Power drills
  • Impact drivers
  • E-bike
Published: 2015-10-08

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