MP6540HA 5.5-50V, 5A Three-Phase Power Stage QFN-26

MP6540HA 5.5-50V, 5A Three-Phase Power Stage QFN-26

The MP6540H and MP6540HA are three-phase brushless DC motor drivers.

Key Specifications

Features

• 5.5V to 50V Operating Supply Voltage
• Three Integrated Half-Bridge Drivers
• Maximum 5A Output Current, 6A Peak Current
• MOSFET On Resistance: HS + LS 45mΩ
• MP6540H: PWM and Enable Inputs MP6540HA: HS and LS Inputs
• Internal Charge Pump Supports 100% Duty Cycle Operation
• Automatic Synchronous Rectification
• UVLO and Thermal Shutdown Protection
• Over-Current Protection (OCP)
• Integrated Bidirectional Current-Sense Amplifiers

Typical Application Circuit

Applications

• Brushless DC Motors

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