TPS53647: Changing UVLO Settings in Pinstrap Mode

Hi Louis,

VIN_UVLO can not be changed via pin strap mode, however, you can change it on the fly thru PMBUS, here is the simple procedure.

1. While V5 reach UVLO, send PMBus command to TPS53647 to change VIN_UVLO.

2. Then make EN high.

Note1. You can issue "Store Config to NVM", then you will no need to change VIN_UVLO for every power up, or, you can change VIN_UVLO every power up without "Store Config to NVM"

Note2. VIN_UVLO can be changed on the fly regardless EN is high or low, it will take effect right away.

Thanks

Chasel

Hi Louis,

Yes, if you store config to NVM, and after next power cycle, UVLO will be 4.5V unless you change the settings again.

Thanks

Chasel

Hi Louis,

Please check datasheet section 7.6.2.3.5.

SendByte to 11h.

Thanks

Chasel