MP6604A 4.5-45V, 2.5A Dual H-Bridge Motor Driver QFN-28

MP6604A 4.5-45V, 2.5A Dual H-Bridge Motor Driver QFN-28

The MP6604A is a dual H-bridge motor driver IC that can drive stepper motors, brushed DC motors, and other loads.

Key Specifications

Features

• 4.5V to 45V Operating Input Voltage (VIN) Range
• 2.5A Maximum Output Current (IOUT)
• Dual H-Bridge or Quad Half-Bridge Driver
• 150mΩ Low On Resistance (per MOSFET)
• Protection Functions: o Over-Current Protection (OCP) o Over-Voltage Protection (OVP) o Under-Voltage Lockout Protection (UVLO) o Thermal Shutdown o Fault Indication Output
• Available in QFN-28 (4mmx5mm) and TSSOP-28EP Packages

Typical Application Circuit

Applications

• Bipolar Stepper Motors
• Stage Lighting
• 3D Printers
• Laser Printers and Copiers

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