BQ25910: BATP/BATN: The kelvin connections to the battery can be made via a 100-Ω resistor

user5781628

Intellectual 970 points

Part Number: BQ25910

Hi TI team,

In page 20 of BQ25910 datasheet, it says "The kelvin connections to the battery can be made via a 100-Ω resistor".

The 100Ω resistor is needed or not? Why?

Thanks!

Eleven

over 2 years ago

0 Zhiyong Xia over 2 years ago

TI__Prodigy 430 points

Hi Eleven,

It is better to have this 100Ω resistor as it can protect battery from short circuit issue at BATP/BATN pins.

Regards,

Zhiyong

0 user5781628 over 2 years ago in reply to Zhiyong Xia

Intellectual 970 points

Hi Zhiyong,

Why the 100ohm resistor could protect battery from short circuit issue?

Please kindly help!

Cheng

0 Zhiyong Xia over 2 years ago in reply to user5781628

TI__Prodigy 430 points

Eleven,

We can refer to following figure to better discuss the protection.

If there is a short circuit issue occurred between BATP and BATA pin (as shown in the above figure), these 100 ohm resistors can prevent huge battery discharging current.

Therefore, it can protect battery from short circuit issue.

Power management

Power management forum

BQ25910: BATP/BATN: The kelvin connections to the battery can be made via a 100-Ω resistor