BQ24040: BQ24040 battery detect

Ella Zhang

Part Number: BQ24040

Hi team,

My customer want to know what will happen if the battery voltage is 0V/0.5V. How the BQ24040 detect if there is a battery if the voltage is very low? They has a problem about waking up the battery after battery short protection.

Could you please help with how the BQ24040 detect the battery when Vout is very low? Thanks a lot!

Best regards,

Ella

over 5 years ago

0 Nick Brylski over 5 years ago

TI__Mastermind 19195 points

Hi Ella,

Battery detect routine is in figure 14 of d/s. It does not operate any differently at low battery voltages. If battery is detected and Vbat < 0.8V, battery charging will be at 15mA, this is the battery short protection.

What is problem customer has been seeing?

Best,

0 Nick Brylski over 5 years ago in reply to Nick Brylski

TI__Mastermind 19195 points

Hi Ella,

Anything else needed here or can I close this?

Thanks,

Power management

Power management forum

BQ24040: BQ24040 battery detect