BQ40Z80: LED Display while Charigng and Discharging

Klaus

Expert 1431 points

Part Number: BQ40Z80

Hi Ti Experts,

we are using the bq40z80 in a 7S1P applicaiton.

Is there a opportunity to let the LEDs light automatically while discharging and charging.

I do not want to push the DISP-Button.

Thanks for helping us.

Klaus

over 5 years ago

0 Luis H. S. over 5 years ago

TI__Mastermind 42060 points

Hello Klaus,

You can configure the LEDs to display SoC during charging by setting LEDCHG = 1. You can read about this on the Technical Reference Manual(Section 9.1.1).

The LEDs can display SoC during discharging only when /DISP is pressed.

Best Regards,

Luis Hernandez Salomon

0 Klaus over 5 years ago in reply to Luis H. S.

Expert 1431 points

Hi Luis,

thanks for your answer.

Is it useful to use a Controller, which triggers the /DISP-Pin for every 2 seconds?

I am asking this, because our customer wants to see the SoC during discharigng permanently.

Thanks.

Klaus

0 Luis H. S. over 5 years ago in reply to Klaus

TI__Mastermind 42060 points

Hello Klaus,

Yes, I believe that would work. The LEDs should remain on after pressing /DISP for LED Hold Time which in default is 4 seconds. Triggering the pin every 2 seconds would be enough for the LEDs to remain on during discharging.

Best Regards,

Luis Hernandez Salomon

0 Klaus over 5 years ago in reply to Luis H. S.

Expert 1431 points

Hi Luis,

ok. Thanks for your answer.

I will try it.

Klaus

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BQ40Z80: LED Display while Charigng and Discharging