TPS544B20: Write Registers after turned on

Yasushi Fujiwara

Part Number: TPS544B20

Hello Experts,

I got question from customer. Customer would like to write a following registers after turned on. Is it possible? Also, do you have any concern?
- WRITE_PROTECT
- CLEAR_FAULTS
- VIN_ON
-VIN_OFF
- IOUT_CAL_OFFSET
- IOUT_OC_FAULT_RESPONSE
- IOUT_OC_FAULT_LIMIT
- IOUT_OC_WARN_LIMIT
- TON_RISE
- VREF_TRIM
- OPERATION
- STEP_VREF_MARGIN_LOW
- PCT_VOUT_FAULT_PG_LIMIT

Best Regards,
Fujiwara

over 3 years ago

0 Gerold Dhanabalan - Online Design Tools over 3 years ago

TI__Genius 14455 points

Hi,

Yes, you should be able to write to the above registers. Is your question, specifically if PMBUS registers are accessible before enabling the converter, the answer is Yes. You should be able acess the PMBUS registers without enabling the converter using CNTL as long as the power input VIN is stable and is sufficient.

Regards,

Gerold

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TPS544B20: Write Registers after turned on