MP6550A 1.8-22V, 2A H-Bridge Motor Driver QFN-12

MP6550A 1.8-22V, 2A H-Bridge Motor Driver QFN-12

Key Specifications

Features

• Wide 1.8V to 22V Operating Input Voltage (VIN) Range
• 2A of Continuous Driver Current
• MOSFET On Resistance (RDS(ON)): High- Side MOSFET (HS-FET) + Low-Side MOSFET (LS-FET) = 240mΩ
• Cycle-by-Cycle Current Regulation/Limit
• Built-In 3.3V Reference Output
• Pulse-Width Modulation (PWM) Input Interface Compatible with Industry-Standard Devices, Up to 100kHz
• Low Standby Circuit Current
• Thermal Shutdown
• Internal Charge Pump
• Cycle-by-Cycle Over-Current Protection (OCP)

Typical Application Circuit

Applications

• Robotics
• Consumer Products

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