TPS62869: Power management forum

Thomas Sagcob

Part Number: TPS62869

Hello E2E team

my question is related to the device with ordering Code TPS628692CRQY:

with PG Output. Because of OpenDrain behavior at PIN9, a PullUp is recommended here.
I will use 4 devices in parallel so the I2C addresses has to be selected via PullDown at PIN9

Does that mean, that the PG variant has only one fixed I2C address or how to covercome this problem?

Thanks in advance

Thomas Sagcob
Mentor Graphics

0 Dorian Brillet de Cande over 3 years ago

Hello Thomas,

Could give me a power tree here ?

Do you want to put the I2C connections in parallel or the output of the devices in parallel ?

Thanks,
Dorian

0 Thomas Sagcob over 3 years ago in reply to Dorian Brillet de Cande

Hi Dorian,

4 devices are connected to identical I2C bus should output 4 different voltages from 1,2V to 1,8V up to 6A to supply 4 FMC cards on Vadj rails.

Regards

Thomas

0 Dorian Brillet de Cande over 3 years ago in reply to Thomas Sagcob

Hello Thomas,

If you select the TPS628692CRQY, you will have access to the PG functionality and not the VSET/VID.

This differentiation needs to be fixed in the datasheet.

I would suggest we continue this discussion by private message/ email.

I send you a friendship request.

Thanks,

Dorian

0 Dorian Brillet de Cande over 3 years ago in reply to Dorian Brillet de Cande

Hello Thomas,

As we are now discussing about your design requirements and how we can address them via email, I will close this thread.

If you want to reopen it or if you uhave furrther questions, please reply below.

Thanks a lot!

Regards,
Dorian