BQ51013B: The compatibility of BQ51013B with priority charging and wireless charging

user5006961

Part Number: BQ51013B

BQ51013B is plugged into usb when the cable is charged, and the Pin AD is closed, and then unplug the usb, unable to restore the wireless charging function.

over 5 years ago

0 Bill Johns over 5 years ago

TI__Guru 65706 points

Check the voltage on AD pin after the USB cable is unplugged, it should decrease to near 0V and wireless power restart.
Note that the TX will need to begin the steps to restart wireless power transfer, it will need to ping the RX to begin power negotiations.

0 user5006961 over 5 years ago in reply to Bill Johns

Intellectual 805 points

The voltage on AD pin is near to 0V, and the AD-EN（pin8) is float .Relocate can restore wireless charging.

0 Bill Johns over 5 years ago in reply to user5006961

TI__Guru 65706 points

Check the voltage at RECT pin and compare it with start up waveform in wireless power FAQ slide 6, below link.
I suspect the TX is going into a sleep mode and not restart power transfer.

e2e.ti.com/.../bqTESLA-FAQ_2D002D00_TX-Trouble-Shooting-Guide_2D00_Rev-1.1.pdf

Power management

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BQ51013B: The compatibility of BQ51013B with priority charging and wireless charging