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DRV8428E: Can I get a wiring diagram for the DRV8428E on a stepper motor.

Eric Lovejoy
Prodigy 10 points
Part Number: DRV8428E

I have some students out here, that for whatever reason, are locked into using the DRV8428E as the motor driver for their project.
( I think they had to submit a BOM, or design specs prior to project completion, and discovered they are having trouble.)
I have read the Data sheet for alternative applications of the DRV8438E/P.

The students have tried connecting the  DRV8428E for a stepper motor in a method consistent with the schematic shown in the DATA sheet, on page 26.
and I have verified this. They however have about 8 smoked chips, so i figured it is time to ask for help. The general internet lacks many examples of people using this chip,
So I figured to ask TI. 
The project is utilizing an esp32, 3.3VDC, with a separate 12V bus for motor power. Yes, the thermal pad is grounded. Decay is set to GND.

Can some one tell me, or show me, if there is any variation between the DRV8428E stepper motor wiring, and the schematic shown on page 26 of the datasheet utilizing the -P variant:
www.ti.com/.../drv8428e.pdf

  • 0
    TI__Genius 16860 points

    Hi Eric,

    I would be happy to help. 

    It is possible the overheating could be due to stepper motor wiring, or firmware implementation.

    Please verify correct motor wiring from stepper motor datasheet with H-Bridge A (AOUT1-AOUT2) and H-Bridge B (BOUT1-BOUT2). Be sure to check what frequency the motor is being driven at as well as what and how the step sequence is being implemented. 

    See our evaluation module, the DRV8428EVM to help with design, wiring, and firmware implementation. The EVM can be ordered on ti.com to be used for testing or the schematic and firmware can be downloaded for evaluation purposes to verify your operation. 

    DRV8428EVM

    Best,

    David