MP6615 4.75-40V, 8A H-Bridge DC Motor Driver QFN-26

MP6615 4.75-40V, 8A H-Bridge DC Motor Driver QFN-26

The MP6615 is an H-bridge DC motor driver with a full bridge consisting of four N-channel power MOSFETs.

Key Specifications

Features

• 4.75V to 40V Operating Input Voltage (VIN) Range
• Internal Full H-Bridge Driver
• 8A of Continuous Output Current (IOUT)
• MOSFET On Resistance (RDS(ON)): 11mΩ per MOSFET
• Internal Charge Pump Supports 100% Duty Cycle Operation
• Under-Voltage Lockout (UVLO) and Over- Voltage Protection (OVP)
• Thermal Shutdown Protection
• Over-Current Protection (OCP)
• Integrated Bidirectional Current-Sense Amplifiers
• Available in a TQFN-26 (6mmx6mm) Package

Typical Application Circuit

Applications

• Brushed DC Motors
• Door Locks and Latch 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