BQ25703A: BQ25703A can't detect the Input source

Naizeng Wang

Part Number: BQ25703A

Hi team,

When the electricity of battery runs out and adapter plugs in, BQ25703A can't enter charging condition. If you understand chinese, please see following picture.

In their schematic diagram, I found that the CHRG_OK pin is not pulled up. Will it result in this problem?

Best regards,

Nison

over 5 years ago

0 Shishuo Zhao over 5 years ago

TI__Expert 3320 points

Hi Nison,

Exactly, CHRG_OK has to be pulled up in order to begin charge. When adapter plugged in CHRG_OK should be pulled up.

If correct adapter plugged in but CHRG_OK pin is not pulled up, we can check Charger status REG0x 21/20h for further debug.

Regards

0 Shishuo Zhao over 5 years ago in reply to Shishuo Zhao

TI__Expert 3320 points

Hi there,

We haven’t heard back from you. We are assuming you were able to resolve your issue. If not, just post a reply below or create a new thread if the thread has locked due to time-out.

Regards,

Power management

Power management forum

BQ25703A: BQ25703A can't detect the Input source