Hello, I designed a SMPS-converter, now I have the problem that my first test, the test if the control-circuit fails.
The circuit is nothing special, the IC is a SG3525. As an attechment I added the control-circuit and the SMPS-circuit.
When I test the control-circuit my problem is, that during the measurement with an oscilloscope this influence in the behavior of the circuit takes. It is definitly not a soldering-problem, I checked it several times.
Perhaps there is a mistake in the design and I don`t see it.
Thank you very much for hints.