BQ27542-G1: Can we series a 1K ohm on BAT pin?

Statham Su

Genius 4990 points

Part Number: BQ27542-G1

Hello Sir:

Cause some reasons that we need to series a 1K ohm on BAT pin of BQ27542-G1.

Can we series a 1K ohm on it?

And the other in real application can we let REGIN voltage is different with VBAT voltage?

Is it acceptable for this battery gauge?

Please provide your recommendations for us.

Thanks a lot.

over 4 years ago

0 Wyatt Keller over 4 years ago

TI__Guru** 105760 points

Hello Statham,

There should be no need for a resistor to the BAT pin, we cannot verify operation with this configuration.

Sincerely,

Wyatt Keller

0 Statham Su over 4 years ago in reply to Wyatt Keller

Genius 4990 points

Hi Keller:

Thanks your feedback.

We checked the function block, BAT pin is an ADC pin.

We usually put a RC filter in other BQ series gauge or AFE.

If we do it as the usual, does it has any side effect on BQ27542-G1?

Please let me know your recommendations.

Thank you very much.

0 Wyatt Keller over 4 years ago in reply to Statham Su

TI__Guru** 105760 points

Hello Statham,

Since we have not validated with this setup I cannot tell you for certain. The input resistance while measuring on BAT is 100kOhm, so as long as the voltage division will not influence your application it should be okay.

Sincerely,

Wyatt Keller

0 Statham Su over 4 years ago in reply to Wyatt Keller

Genius 4990 points

Hi Keller:

Thanks a lot your feedback again.

It's useful for us.

Power management

Power management forum

BQ27542-G1: Can we series a 1K ohm on BAT pin?