TPS25990: Accuracy of current measurement

Ohad Bonneh

Intellectual 1950 points

Part Number: TPS25990
Other Parts Discussed in Thread: TPS25985,

Hi Team,

We use TPS25990 and TPS25985 in parallel and we monitor the Iin current through the PMBUS.

What is the accuracy of current measurement? Is it change because to ICs are in parallel?

Thanks!

over 1 year ago

0 Avishek Pal over 1 year ago

TI__Mastermind 38960 points

Hi Ohad,

Thanks for reaching out. Today is holiday for TI India. We will get back to you tomorrow.

0 Ohad Bonneh over 1 year ago in reply to Avishek Pal

TI__Intellectual 1950 points

OK,
have fun!

0 Avishek Pal over 1 year ago in reply to Ohad Bonneh

TI__Mastermind 38960 points

Hi Ohad,

It is expected to increase. Effective accuracy is calculated using root sum square (RSS) method. Considering 2% current monitoring accuracy in each device, the effective accuracy will be 2√N, where N is the number of devices in parallel.

Power management

Power management forum

TPS25990: Accuracy of current measurement