Part Number:UCC2897A
Hi
My Customer is current 22W active clamp forward circuit configuration of UCC2897A.
The first problem I found is that the output inductor is applied to 22uF and the circuit oscillates after a certain time, when the output capacitor is 540uH (270x2).
Conversely, lowering the output inductance to 1.5uF improves the problem.
I implemented the circuit with caculator and webench.
In this circuit, the output inductor was increased to about 120 uF and the output capacitor was reduced to 10 uH.
However, testing the current board and increasing the output inductor will cause the circuit to start oscillating at 5uH.
Can the trans L value affect this? Or what should we look at? We tried to change the trans L value, but there was no big change.
Is it possible to reduce the inductance to 1.5 uF, which is different from the calculated value?
I attach the test contents of the customer's company.
The current customer plans to design 44W through the next version development.
