LNK3206D Gournd drifting
Posted by: John Zigrang
on
In an off-line switch, is the GND generated has a floating / drifting component to it?
I am taking the AC source before the Half Bridge and dividing down to measure the amplitude and frequency.
I find that the AC varies a lot in amplitude which causing jitter in frequency because the ac crossing point is moving up/down.
My design if for 3 phases, but I have not been able to get 1 to work.
Files
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Schematice | 2.73 MB |
Scope Image at Test Point | 770.56 KB |
Hi John Zigrang,
Are you experiencing this problem only while LNK3206 is operating?
Or do you still have this problem even if you remove the buck converter?