BQ40Z80: How to read Vshutdown+ and Vshutdown- of BQ40Z80

Annie Liu

Part Number: BQ40Z80

Hi Team,

The customer wants to know if BQ40Z80 manages a 4-string battery, does Vshutdown- mean that a single battery is less than 2.2V Max, or the total series voltage of four batteries is less than 2.2V Max?

Regards,

Annie

over 2 years ago

0 Wyatt Keller over 2 years ago

TI__Guru** 105590 points

Hello Annie,

Datasheet values always specify which voltage is being referenced. The shutdown is based on the stack, not per-cell basis. If voltage is less than 2v typ, then the gauge will enter shutdown (forced by hardware) you can enter shutdown mode through the firmware which has different criteria outlined in the TRM.

Sincerely,

Wyatt Keller

0 Annie Liu over 2 years ago in reply to Wyatt Keller

TI__Genius 10295 points

Hi Wyatt，

Unfortunately, the customer still did not understand. Does the shutdown voltage compare with the voltage of PIN PACK? Or any other pin's voltage? Or what voltage difference?

Regards,

Annie

0 Wyatt Keller over 2 years ago in reply to Annie Liu

TI__Guru** 105590 points

Hello Annie,

Yes it references the PACK pin on the gauge.

Sincerely,

Wyatt Keller

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BQ40Z80: How to read Vshutdown+ and Vshutdown- of BQ40Z80