MP6534 5-55V Brushless DC Motor Pre-Driver QFN-40

MP6534 5-55V Brushless DC Motor Pre-Driver QFN-40

The MP6534 is a gate driver IC designed for three-phase brushless DC motor driver applications.

Key Specifications

Features

• Wide 5V to 55V Input Voltage Range
• Charge Pump Gate Drive Supply
• Bootstrap High-Side Driver with Trickle- Charge Circuit Supports 100% Duty Cycle Operation
• 500mA Buck Regulator
• Low-Power Sleep Mode
• Programmable Short-Circuit Protection
• Over-Current Protection
• Adjustable Dead-Time Control to Prevent Shoot-Through
• Thermal Shutdown and UVLO Protection
• Fault Indication Output

Typical Application Circuit

Applications

• 3-Phase, Brushless DC Motors and Permanent Magnet Synchronous Motors
• 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