Other Parts Discussed in Thread: PMP8920, , UCC24610
I adapted my PSU from the PMP8920 project (www.ti.com/.../slurag9a.pdf). My project uses 220VAC @ 60Hz at the input and needs 12V @ 10A (120W) at the output. I'm using the (UCC25600 + UCC24610) equal to the reference design mentioned.
However, when I have low output power (between 0.4A to 2.5A), the UCC25600's "GD1 and GD2" pins and the UCC24610's "GATE" pin become unstable.
The source does not drop, but the output ripple is high. Before 0.4A and after 2.5A the source works perfectly.
What could be happening? Problem with UCC25600 or UCC24610 circuits?
Thank you guys!