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DRV8305-Q1: Spec question on WAKE pin

Alvin Zheng
Intellectual 900 points
Part Number: DRV8305-Q1
Other Parts Discussed in Thread: DRV8305

Hi, Team

As described in spec chapter 7.4.4: For the DRV8305 to be brough out of sleep, the WAKE pin must be at a voltage greater than 3 V.

As shown in electrical characteristics:

What do VIL_WAKE and VIH_WAKE stand for? When will we use these 2 values? When will we must drive WAKE>3V?

  • 0
    TI__Intellectual 2595 points

    Hi Alvin,

    VIL_WAKE is the voltage at which the logical state of the WAKE input will switch from high to low.

    VIH_WAKE is the voltage at which the logical state of the WAKE input will switch from low to high.

    Essentially, this means that at <1.1V, the WAKE pin will always be in the "low" state, and at >1.75V, the WAKE pin will always be in the "high" state.

    The description in section 7.4.4 is incorrect and will be corrected in a future datasheet revision, please refer to the spec in the electrical characteristics table. The device will exit sleep if the voltage on the WAKE pin exceeds the VIH_WAKE threshold.

    Thanks,

    Garrett