MP6602 4.5-35V, 4A Stepper Motor Driver QFN-25

MP6602 4.5-35V, 4A Stepper Motor Driver QFN-25

The MP6602 is a stepper motor driver with a built-in indexer/translator and internal current regulation.

Key Specifications

Features

• 4.5V to 35V Operating Input Voltage (VIN) with 40V Absolute Maximum
• Two Internal Full-Bridge Drivers
• Supports Unipolar Motor
• Up to 1/32-Step Microstepping
• Internal Current-Sensing and Regulation
• Low On Resistance: o High-Side MOSFET (HS-FET): 60mΩ o Low-Side MOSFET (LS-FET): 30mΩ
• Serial Control Interface
• Enable and Step Input Pins
• 3.3V and 5V Compatible Logic Supply
• 4A Maximum Output Current

Typical Application Circuit

Applications

• Bipolar Stepper Motors
• 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