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DRV8824: Cannot generate V3P3OUT

Serafino Convertini
Prodigy 120 points
Part Number: DRV8824

Hi,

I placed in my board, two driver stepper stage using DRV8824 as in the following image.

I think I configured the driver as described in the datasheet. When +12V power supply is present, no voltage is present at V3P3OUT pin.

Am i wrong something?

Thank you for your support

  • 0
    Prodigy 120 points

    Here is the placement and routing on board.

  • 0 in reply to Serafino Convertini
    TI__Guru** 114905 points

    Hi Serafino,

    From section 8.3.6 of the datasheet:

    Driving nSLEEP low puts the device into a low-power sleep state. In this state, the H-bridges are disabled, the gate drive charge pump is stopped, the V3P3OUT regulator is disabled, and all internal clocks are stopped. In this state, all inputs are ignored until nSLEEP returns high. When returning from sleep mode, some time (approximately 1 ms) needs to pass before applying a STEP input, to allow the internal circuitry to stabilize.

    nSLEEP must be high to enable V3P3OUT. An external 3.3V signal is required to wake the device.