BQ27427: BQ27427 & BQ25306 Connection

shshin

Prodigy 60 points

Part Number: BQ27427

Tool/software:

Hi.

Please make sure there are no problems with the circuit diagram.

My question is whether the SRX pin of BQ27427 should be connected to BAT+ or GND.

The I2C pull-up resistor is connected to another circuit.

3 days ago

0 Alan Frias 2 days ago

TI__Mastermind 26945 points

Hello,

This question has been assigned and will be reviewed when possible by a member of the team.

Thank you,
Alan

0 Dominik Hartl11 2 days ago

TI__Guru 62006 points

The SRX pin must be connected to the application's power supply rail (the same as the charger). If you connect this to GND and BAT to the positive cell terminal then you effectively create a short-circuit (with the internal sense resistor that is just a few mOhm) and burn up the gauge.

0 shshin 10 hours ago in reply to Dominik Hartl11

Prodigy 60 points

According to you, SRX pin should be connected to charger+, right?

Then, is it correct to connect to the SW pin of BQ25306RTER?

Power management

Power management forum

BQ27427: BQ27427 & BQ25306 Connection