Hi all,
I am designing the custom wireless charging receiver using the STWLC38JRM chip
Currently, when I put the circuit on the wireless charging pad (Qi standard), I notice that the STWLC38JRM chip does not output 5V at the VOUT pin.
Below is the schematic, I copied all the things from the STDES-WLC38WA board, the coil part number is 760308101219 but the circuit does not work, the only thing that worked is the I2C communication, when I supply 5V to the VOUT pin, I was able to communicate and read ID chip.
and Below the schematic is the scope that I captured when put the circuit on the wireless charger pad
Red is AC1, green is AC2, yellow is VRECT, and blue is VOUT
I see the VOUT is still 0V and the AC1, AC2, and VRECT waveforms look like wrong.
Currently, I don't use the temperature sensor NTC so I designed a 100k resistor pull-down and 100k pull-up to VAA at NTC (F1 pin).
Can you guys help me fix this issue?
Thank you so much
