BQ24075: recharge coin battery solution

Brian Chan

Expert 3420 points

Part Number: BQ24075
Other Parts Discussed in Thread: BQ25170, BQ25185, BQ25710, BQ25790, BQ25180

Hi Team

do we have any batter charger IC for coin battery which can be conducted in shipping mode?

below is coin battery spec.

BRs

Brian

3 months ago

0 Garrett Kreger 3 months ago

TI__Mastermind 21685 points

Hi Brian,

The BQ24075 is not a good option for charging this specific coin battery because the battery regulation voltage cannot be modified from the 4.2V default.

Referring to the spec the below 2 parts are possible options.

BQ25170 -> Has 3.5V min battery regulation voltage and 10mA min Ichg
BQ25185 -> Has 3.6V min battery regulation voltage and 5mA min Ichg

Best Regards,

Garrett

0 Brian Chan 3 months ago in reply to Garrett Kreger

TI__Expert 3420 points

Hi Garrett

do BQ 25170 have shipping mode function?

I find the datasheet have shipping mode address.

however below link refer the BQ25710 doesn't have such function

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/970936/bq25710-enter-shipping-mode?tisearch=e2e-sitesearch&keymatch=bq25710%20shipping#

can BQ25790 be used in customer application? if they need shipping mode?

BRs

Brian

0 Garrett Kreger 3 months ago in reply to Brian Chan

TI__Mastermind 21685 points

Hi Brian,

The BQ25790 has a minimum charge current of 50mA. Based on the battery spec provided this minimum current is too large. Typically for a small coin cell battery you do not need a switching charger.

Brian Chan said:
do BQ 25170 have shipping mode function?

BQ25170 does not have shipping mode function and neither does BQ25185.

Does the customer need a standalone charger or is I2C controlled acceptable? The BQ25180 is I2C controlled, has ship mode, and supports 5mA min charge current.

Best Regards,

Garrett

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BQ24075: recharge coin battery solution