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DRV8834: Regarding the issue with the DRV8834 STEP signal

he yaokun
Prodigy 20 points
Part Number: DRV8834

HI：

I am currently using the STEP signal to control the motor pulses: 

NO. PARAMETER CONDITIONS MIN TYP MAX UNIT
1 fSTEP Step frequency 250 kHz
2 tWH(STEP) Pulse duration, STEP high 1.9 µs
3 tWL(STEP) Pulse duration, STEP low 1.9 µs
4 tSU(STEP) Setup time, command to STEP rising 200 ns
5 tH(STEP) Hold time, command to STEP rising 1 µs
6 tWAKE Wake-up time, nSLEEP inactive to STEP 1 ms

Will changing the ratio of tWH and tWL affect the operation of DRV8834 under the timing requirements above?

THANKS！

  • +1
    TI__Mastermind 23431 points

    Hey He,

    Our devices trigger the step movement on the rising edge of the STEP signal.  Duty cycle of the signal doesn't matter, as long as you obey the 1.9us minimum time of the signal.  

    If this is a new design I recommend looking at DRV8424 instead, it is a much more recent motor driver than DRV8834. 

    Best,

    Jacob