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RE: DRV8844: As Bipolar Stepper Motor Driver

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Hi Rav,

Does your circuit look like the functional block diagram shown in the datasheet (section 7.2) with the optional current sense resistors?

The sense resistors should be less than 200mOhm to remain below the absolute maximum of 0.6V on SRC12 and SRC34. How are you measuring the voltage across the resistors to regulate the current?

Also please note the datasheet recommends a 100nF charge pump cap and a 10nF cap across CP1 and CP2.

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