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TPS25730: How to disable Power Path in case of Power Capability Mismatch

Jaime Santos
Prodigy 30 points
Part Number: TPS25730
Other Parts Discussed in Thread: TPS25751

Tool/software:

Hello,

I would like to know the best way to disable the Power Path in case of a Power Capability Mismatch when using TPS25730.

TPS25730 has a pin (CAP_MIS) that is toggled when a Power Capability Mismatch occurs. In our application, we will have a 4-Switch Buck-Boost (BQ25756RRVR) connected to TPS25730.

Is the best way to do it by disabling the Buck-Boost using CAP_MIS pin?

In case of TPS25751, there is an internal register that can be configured to disable the Power Path in case of a Power Capability Mismatch, but TPS25730 does not have this capability.

Thank you for your support in advance.

Best regards,

Jaime

  • 0
    TI__Mastermind 34256 points

    Hi Jaime, 

    The CAP_MIS pin for TPS25730 is only used for indicating if a capability mismatch has occurred, it does not disable the power path. 

    Jaime Santos said:
    Is the best way to do it by disabling the Buck-Boost using CAP_MIS pin?

    You can use this CAP_MIS potentially to enable/disable the DCDC EN pin (if applicable).

    While TPS25751 does support disabling the power path during capability mismatch, it does require an EEPROM or an EC to load its configuration upon bootup. 

    Thanks and Regards,

    Raymond Lin