MPQ6539-AEC1 BLDC Motor Pre-Driver QFN-28

MPQ6539-AEC1 BLDC Motor Pre-Driver QFN-28

The MPQ6539-AEC1 is a gate driver IC that is designed for three-phase, brushless DC (BLDC) motor driver applications.

Key Specifications

Features

• Supports 80V Operation
• 100V Maximum Bootstrap (BST) Voltage (VBST)
• Internal Low-Dropout (LDO) Supports External NPN for High-Current Driver Requirements
• Integrated Current-Sense (CS) Amplifier
• Low-Power Sleep Mode for Battery- Powered Applications
• Configurable Over-Current Protection (OCP) for External MOSFETs
• Adjustable Dead-Time (DT) Control to Prevent Shoot-Through
• Thermal Shutdown and Under-Voltage Lockout (UVLO) Protection
• Fault Indication Output
• Available in a Thermally Enhanced, Surface-Mount QFN-28 (4mmx5mm) Package with Exposed Pad and Wettable Flanks

Typical Application Circuit

Applications

• Three-Phase Brushless DC (BLDC) Motors and Permanent Magnet Synchronous Motors (PMSMs)
• Power Drills

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