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TPL5110 DRV and M_DRV usage

Stephen Fenwick
Intellectual 260 points
Other Parts Discussed in Thread: TPL5110

I'd like to use the TPL5110 as a power-on controller, to hold a larger system in power-down until a momentary pushbutton is pressed. One question is this: it looks from the datasheet that if the DELAY/M_DRV signal is held high with EN/ONE_SHOT held low, the DRV output will remain low. Is that actually the case? If M_DRV is held high, DRV will he held low, and then when M_DRV is released, DRV will be driven high after a time determined by the resistor on M_DRV? And, after all of this, the one-shot functionality will be re-enabled for subsequent button presses?

  • 0
    TI__Expert 5145 points

    Hi Stephen,

    Yes, it is correct: if the DELAY/M_DRV signal is held high, the DRV output will remain low, independently from the status of the EN/ONE_SHOT.

    If the EN/ONE_SHOT is held low (One Shot Mode), when the DELAY/M_DRV is released, DRV will be driven high after the time interval determined by the resistor connected on DELAY/M_DRV pin.

    To enable another one-shot functionality, the reset button connected to the DELAY/M_DRV should be pressed, in order to hold the DELAY/M_DRV at high level.

    Please let know if now is more clear or if you need further information.

    Best regards,

    Carmine