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[FAQ] TPS53685: [FAQ] PMBus Address setting for TPS53685 and TPS536C5

Part Number: TPS53685
Other Parts Discussed in Thread: TPS536C5,

TPS53685 and TPS536C5 supports two methods to set PMBus address.

  • PD (Pin Detect)

When using PD method, first we have to know the "PD_PMBUS_ADDRESS".  PD PMBUS_ADDRESS is the initial base setting of the PMBus address when appling PD method.

The default PD_PMBus_ADDRESS :

TPS53685: 3Fh

TPS536C5: 5Fh

The RADDR will provide the offset.


  • NVM

Place RADDR >15k Ohms will be consider as an OPEN, and you can directly change the PDBUS_ADDRESS inside the config file.

Example: Using TPS536C5, PMBus address is 60h

  • PD
    1. let RADDR be 511 Ohms. (5Fh+1 = 60h)
    2. Change the "PD_PMBUS_ADDRESS" to 60h and let RADDR be 0 Ohms.

  • NVM
    1. Place RADDR >15k Ohms, and set the PMBUS_ADDRESS in the config file.