BQ24195: IC Warming up without battery

Marcos Thimotti Amaral

Part Number: BQ24195

When I run the test without battery or charge, the IC is warming up. Input current is approaching 2A, is this normal? How should I test the functioning of the IC on the battery? This is my schemattic for reference.

over 3 years ago

+1 Ning T over 3 years ago

TI__Guru 54491 points

Hi,

Although there's no battery, there should be other load (e.g. SYS load) so that the input current is approaching 2A. The IC temperature could increase as the load current increase (charging load and/or SYS load etc.).

Please visit https://e2e.ti.com/support/power-management/f/196/t/878463 for BQ2429X: Schematic Review and PCB Layout Design Tips

Thanks,

Ning.

0 Marcos Thimotti Amaral over 3 years ago in reply to Ning T

Prodigy 25 points

With the system powered only by the battery, without an external source, the current on the BAT pin is 160 mA. The IC is heating up in this case too. This current should have a value close to 15mA, right? What could be happening?