BQ40Z50: How to close "Hardware protection" detect by bq40Z50

Cherry Zhou

Mastermind 22235 points

Part Number: BQ40Z50

Hi team,

How to close "Hardware-Based Protection" detect?

Now it always trigger AOLD protection.

Because the customer's new product "Peak Current" has a high chance to over -100A

Could you help check this case? Thanks.

Best Regards,

Cherry

over 2 years ago

0 Wyatt Keller over 2 years ago

TI__Guru** 105760 points

Hello Cherry,

100mV is the max the gauge can be set to for this protection, you would have to use a lower sense resistor in order to support applications with over 100A discharges.

Sincerely,

Wyatt Keller

0 Cherry Zhou over 2 years ago in reply to Wyatt Keller

TI__Mastermind 22235 points

Hi Wyatt Keller,

Thank you for the support.

Why can the maximum value of ASCDx reach -200mV as the following figure?

Thanks and regards,

Cherry

0 Wyatt Keller over 2 years ago in reply to Cherry Zhou

TI__Guru** 105760 points

Hello Cherry,

The ASCD hardware overcurrent protections occur faster than the overload (AOLD). The gauge cannot support continuous currents over 100mV (100A with 1mOhm sense resistor) because AOLD maximum setting is 100mV.

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ40Z50: How to close "Hardware protection" detect by bq40Z50