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DRV8426: Smart tune ripple control

Part Number: DRV8426


Could you tell me the condition that decay mode turns fast decay on ripple control mode as the following inside of red rectangle?

Best Regards,


  • Kuramochi-san,

    This occurs on a step change between two micro-stepping levels when current is falling.  Fast decay is introduced to ensure current waveform does not get distorted and can "catch up" with the high speed STEP pulses.