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TPS544C20: Setting Registers

Shinichi Yokota
Genius 9715 points
Part Number: TPS544C20

Hello,

I have a few questions about TPS544x20 family (x = B, C).

  • Which registers can be written with the CNTL pin High (conversion enable)?
  • When is a new setting of the TON_RISE register effective after it's written with the CNTL pin Low (conversion disable)? On-the-fly? Or, when the conversion gets enabled?

Best regards,
Shinichi Yokota

  • 0
    TI__Guru 56795 points

     

    Shinichi Yokota said:
    Which registers can be written with the CNTL pin High (conversion enable)?

    All supported PMBus commands on the TPS544x20 family are available for write while output conversion is enabled.

    TI does not recommend using the STORE_USER_ALL or RESTORE_USER_ALL commands while conversion is enabled, but they are not prohibited by the device.

    Shinichi Yokota said:
    When is a new setting of the TON_RISE register effective after it's written with the CNTL pin Low (conversion disable)? On-the-fly? Or, when the conversion gets enabled?

    TON_RISE is updated "on the fly" as soon as it is written, but writing TON_RISE will not enable conversion or start the rise of VOUT.

    VOUT will rise according to the updated TON_RISE on the next enable of conversion through the CNTL pin or OPERATION command, as selected by the ON_OFF_CONFIG command value.