Other Parts Discussed in Thread: UCC28700
Hi,
Customer of mine is designing USB type A charger that uses this reference circuit. Initial debugging, we found no output at Transformer pin 5, hence no output at pin Vdd of UCC28700. further measure found that D33 or R52 output voltage is just around 1V
Could you advise what is the possible root cause that no output at pin 5 of transformer/no Vdd at UCC28700?
I attached customer schemactic for your reference
Please also advise what how to troubleshoot this issue
Thanks
