MP6543H 3-22V, 2A Three-Phase Power Stage QFN-24

MP6543H 3-22V, 2A Three-Phase Power Stage QFN-24

The MP6543H family of products (MP6543H, MP6543H-A, and MP6543H-B) are three-phase brushless DC motor drivers.

Key Specifications

Features

• 3V to 22V Operating Supply Voltage
• Three Integrated Half-Bridge Drivers
• 2A Continuous Output Current
• MOSFET On Resistance: 110mΩ per FET
• MP6543H: EN and PWM Inputs
• MP6543H-A: LS and HS Inputs
• MP6543H-B: Hall-Effect Sensor Inputs
• Built-In 3.3V, 100mA LDO Regulator
• Internal Charge Pump Supports 100% Duty Cycle Operation
• Automatic Synchronous Rectification

Typical Application Circuit

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