MP6543A 3-12V, 2A Three-Phase Power Stage QFN-24

MP6543A 3-12V, 2A Three-Phase Power Stage QFN-24

The MP6543 family of products are all three- phase brushless DC motor drivers.

Key Specifications

Features

• 3V to 12V Operating Supply Voltage
• Three Integrated Half-Bridge Drivers
• 2A Continuous Output Current
• MOSFET On Resistance: 110mΩ per FET
• MP6543: ENBL & PWM Inputs MP6543A: LS & HS Inputs MP6543B: Hall-Signal Inputs
• Built-In 3.3V, 100mA LDO Regulator
• Internal Charge Pump Supports 100% Duty Cycle Operation
• Automatic Synchronous Rectification
• Under-Voltage Lockout (UVLO) and Thermal Shutdown Protection
• Over-Current Protection (OCP) with Adjustable Threshold

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