BQ40Z80: How does “DUTY”come when calculating balance time per mAh cellx

changhe wen

Part Number: BQ40Z80

Dear TI experts,

The following figure：

please tell me how does “DUTY”come when calculating balance time per mAh cellx?Is it a fixed value or a set value, or a calculated value? How can I get it、

thanks!

changhe wen

over 5 years ago

0 Kang Kang over 5 years ago

TI__Mastermind 24870 points

Hello Changhe,

I believe for Duty, just use 0.75 as suggested above.

0 changhe wen over 5 years ago in reply to Kang Kang

Prodigy 150 points

Thank you for your reply, but please look at this post. Why did Batt finally say to use the value of 54.4%?

https://e2e.ti.com/support/power-management/f/196/t/835500?tisearch=e2e-sitesearch&keymatch=bq40z80%25252520balanc

0 changhe wen over 5 years ago in reply to Kang Kang

Prodigy 150 points

e2e.ti.com/.../835500

0 Kang Kang over 5 years ago in reply to changhe wen

TI__Mastermind 24870 points

Hello Changhe,

I will have to double check. I'm not sure where the 54.4% comes from. Let me check with the design team.

Power management

Power management forum

BQ40Z80: How does “DUTY”come when calculating balance time per mAh cellx