Hello
I am developing an RX charger using BQ51013B.
The battery specification is 3.7V 24mA.
WPC certification is in progress.
Compatibility testing has passed.
But Interoperability test failed.
Error on Belkin TX device.
The symptoms of malfunction are...
One minute after starting charging, the Belkin charger turns off, turns on, and starts charging.
After 1 minute, turn off the power again, turn on, and start charging.
And charge it normally.
Cause Analysis Results
Belkin TX occurs when RX pwr is less than 1W.
The circuit diagram is shown below.
Antenna : PCB Antenna
Rrect : 15Kohm , ( 20Kohm : Compability Fail , 15Kohm : Compability pass )
Rfod : 200ohm
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If you change the RRECT to 12 kohm and proceed with the test, the Belkin charger will pass.( RX Pwr 1W )
However, Compatibility fails.
Please give me some advice.
Below is the no9 test picture. .
