BQ77915: Votd, Votc,Vutd,Vutc

HARINI KRISHNA

Expert 1905 points

Part Number: BQ77915

Hi ,

I need to configure

Votd= 65 degree Celsius
Votc = 50 degree Celsius
Vutd=-10 degree Celsius
Vutc = 0 degree celsius

How do i configure them separately?

Regards

Harini Krishna

over 5 years ago

0 Shawn Hinkle over 5 years ago

TI__Expert 7455 points

Hi Harini,

The temperature thresholds cannot be configured separately. They can be adjusted according to the value of the Rts_pu, but all of the thresholds will shift together. See section 10.1.1.5 in the datasheet for more details.

0 HARINI KRISHNA over 5 years ago in reply to Shawn Hinkle

Expert 1905 points

Hey Shawn,

Thankyou for replying. As suggested in the section 10.1.1.5, I calculated the Rts_pu= 9.81K ohm for 45 degree celsius otc trip point . I want to know the rest of the of the trip points (eg OTD, UTC,UTD). How can i know to value they have shifted to?

thankyou

Regards

Harini krishna

0 Shawn Hinkle over 5 years ago in reply to HARINI KRISHNA

TI__Expert 7455 points

Hi Harini,

For 9.81kOhm Rts_pu you will have approximately this configuration:

OTC: 45C

UTC: 2C

OTD: 58C

UTD: -3C

0 HARINI KRISHNA over 5 years ago in reply to Shawn Hinkle

Expert 1905 points

Hi Shawn,

Thank you for the reply.

We are still working on the schematic and the the RTS_pu value is not yet fixed.

Can you tell me how can i calculate these values on my own? can you give me any reference for the calculation?

Thank you

Regards

Harini Krishna

Power management

Power management forum

BQ77915: Votd, Votc,Vutd,Vutc