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TPIC2060A: P5V OFF, P12V ON

na na78
Guru 16770 points
Part Number: TPIC2060A

Hi

Is it allowed  to supply only P12V to TPIC 2060A while in no driving operation?

(Stopped supplying to P5V terminal)

The purpose is to reduce power consumption.

BestRegards

  • 0
    TI__Genius 14485 points

    You should be able to remove the 5-V supply. The RDY pin will go low once the 5-V rail is off.

    If your goal is power-savings, the TPIC2060A can go into sleep mode when the XSLEEP bit is set to 0. In standby, the current requirement is only 0.6 mA. If you do this, removing the 5-V supply may not be necessary.

  • 0 in reply to James Lockridge19
    Guru 16770 points
    Hi James

    I would consider standby mode, thanks.


    I have additional question about removing 5V supply.

    Removing 5V supply would lead that the RDY pin goes low.

    1.
    What is happen to TPIC2060A while being output RDY low?
    Does the output status of SPM/SLED/LOAD/STEP/ACT change to Hi-Z?

    Does returning 5PV supply execute POR automatically?

    2.
    The absolute maximum ratings shows that input/output voltage is limited to VCC+0.3 maximum.
    What power rail is related for this VCC? ( P5V? P12V?)

    3.
    Is there no damage even if it is kept that applying only 12V ( P12V=12V, P5V=0V) while a long term?
    (I think it will be OK, but for just in case.)

    BestRegards
  • 0 in reply to na na78
    TI__Genius 14485 points
    1. Yes, all outputs will be Hi-Z, and POR will execute automatically.

    2. The VCC is dependent on the pin. The motor drivers all output 12-V, so they will be tolerant to the P12V supply. The logic pins are tolerant to SIOV. P5V powers the internal analog circuitry, so CA5V is the only pin where this VCC+0.3V requirement applies. Page 14 of the datasheet shows mostly which supplies are associated with which pins.

    3. Correct, there should be no damage to the device for the condition P12V=12V, P5V=0V over the long term.