TPS546D24: How should I setting “pin-strapping”

Hello,

Can you please provide further information regarding the switching frequency and soft-start times that your design requires?

Sincerely,

Alec Biesterfeld

1）Vin=12V, Vout=0.85V, Iout= 40A, switching frequency= 550kHz,  Tss= 1ms

2) Vin=12V, Vout=1V, Iout= 40A, switching frequency= 550kHz,  Tss= 1ms

       Compensation loop parameters  can not be determined due to lack of full datasheet. 

       I found some answers about TPS546D24 like

       "   the pin programming for the TPS546D24 is not rated for start-up under the full product temperature range or over product life, so the pin detected values must be stored to NVM and the PIN_DETECT_OVERRIDE must be set to 0000h are part of the production flow".

      The answer above means PMBUS must be used for TPS546D24 working stably under the full product temperature range or over product life, is that right?

       Or, TPS546D24 customized by the factory before delivery?

As far as pre-programming the IC goes, that can be arranged by some product vendors, but TI will not offer custom pre-programming of the IC. The ICs programmed at the factory will contain the information outlined in the datasheet. As far as obtaining a complete datasheet for the TPS546D24, that must be requested at the following link: https://www.ti.com/product/TPS546D24

Then scroll down to the following:

For your applications:

MSEL2 on both devices can use: R_bot = 4.42kohm, R_top= 18.7kohm

MSEL1 on both devices can use: R_bot=5.9kohm, R_top= 5.36kohm

ADRSEL can be floated to set the PMBus address to the EEPROM default of x24. This can be left open for x7F as the PMBus address

VSEL on the 0.85Vout part can use: R_bot=4.42kohm, R_top=18.7kohm

VSEL on the 1.0Vout part can use: R_bot=4.8kohm, R_top=11.5kohm

Regards,

Alec Biesterfeld

       Thanks a lot.

       Our device TPS546D24 will been used in it, has a long life cycle and requires high stability and strong environmental adaptability. So I have a question that needs to be confirmed:

      PMBUS must be accessed in order to configure pin detected values to NVM and PIN_DETECT_OVERRIDE  for TPS546D24 working stably under the full product temperature range or over product life, is that right?

       because, I got answer " the pin programming for the TPS546D24 is not rated for start-up under the full product temperature range or over product life, so the pin detected values must be stored to NVM and the PIN_DETECT_OVERRIDE must be set to 0000h are part of the production flow " from TI's FAE.