MP6500A 4.5-35V, 2.5A Stepper Motor Driver QFN-24

MP6500A 4.5-35V, 2.5A Stepper Motor Driver QFN-24

The MP6500A is a stepper motor driver with a built-in translator and current regulation.

Key Specifications

Features

• Wide 4.5V to 35V Input Voltage Range
• Two Internal Full-Bridge Drivers
• Internal Current Sensing and Regulation
• Low On Resistance (HS: 195mΩ, LS: 170mΩ)
• No Control Power Supply Required
• Simple Logic Interface
• 3.3V and 5V Compatible Logic Supply
• Step Modes from Full-Step to Eighth-Step
• 2.5A Output Current
• Automatic Current Decay

Typical Application Circuit

Applications

• Bipolar Stepper 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