BQ27426: I'm looking for a gas gauge for coin batteries.

Yuta Nishie

Part Number: BQ27426

Tool/software:

Hi,

I found the following thread and found out that there are gas gauge ICs for coin batteries.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1397976/bq27z558-battery-monitoring-ic-for-1-cell-coin-battery?tisearch=e2e-sitesearch&keymatch=button%25252525252520battery%25252525252520monitoring#

I will be using a coin battery called CR2032. Do you have any other products you recommend? If possible, I would like to know products with lead packaging such as SOT-23.

Best Regards,

Nishie

7 months ago

0 Jonny 7 months ago

TI__Mastermind 24851 points

Hello,

Is this a primary cell (non-rechargeable) cell? You cannot use a primary cell with the BQ27426.

Regards,

Jonny.

0 Yuta Nishie 7 months ago in reply to Jonny

Genius 4955 points

Hi Jonny-san,

Thank you for your support.

CR2032 is a primary battery.

I would like to monitor the remaining amount of this battery, so that the user can know the remaining amount to guide the battery replacement. Are there any ICs other than BQ27426 that can achieve this specification?

Best Regards,

Nishie

+1 Jonny 7 months ago in reply to Yuta Nishie

TI__Mastermind 24851 points

Hello,

The BQ27426 cannot be used for primary cells. The BQ35100 is the only gauge in our portfolio for primary (non-rechargeable) batteries.

Regards,

Jonny.

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BQ27426: I'm looking for a gas gauge for coin batteries.