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TPS546D24A: Switching frequency controlled through PMBus

Kelly Bai
Intellectual 1330 points
Part Number: TPS546D24A

hi Team,

if we want to change switching frequency from PMBus of TPS546D24A, besides writing Register 33h(frequency_switch) to a wanted value, what else command do we need to write?

thanks.

  • 0
    TI__Mastermind 22400 points

    Kelly,

    To change the switching frequency of the TPS546D24A using PMBus, write the desired value from Table 7-43 to register 33h.

    To write this new switching frequency to NVM, write FFh to registers 04h (PHASE), 15h (STORE_USER_ALL) and 16h (RESTORE_USER_ALL) in order. To default to this value on start-up, write a 0 to bit 1 of register EEh (MFR_SPECIFIC_30 (PIN_DETECT_OVERRIDE)). This will reset the FREQUENCY_SWITCH register to the NVM value on power-up.