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Hi team,
My customer using UCC28740+UCC24636+TPS25740 to build a 100W Type C Adapter. But found that the DRV voltage become abnormal when load current increase, please find below waveform.
Could you help to share your comments to improve?
Fery,
Thanks for your note here.
It appears that the device is going into current limit. They may need to look at sizing of CS signal especially.
Can you provide Vout, CS, Aux winding waveform, and Vdd signals as well?
If you can share schematic that will be very helpful.
What input voltage and output voltage/current is this occurring?
Regards
John
Hi John,
Thanks for your quick response, please find attached detail test result.
the input voltage is 110VAC, and when the output current larger than 5V@2A, it will occur.
Hello Ferry,
I reviewed your e2e inquiry and have attached my feedback and suggestions in the attached PDF.
Regards,
Mike