Hi,
I used Workbench to design a +-30V out, 9-36V in supply using flyback topology, delivering about +-10mA. I need low ripple, because I use this supply for OPs (OPA454).
Basically the circuit is working, giving +-30V, enough current, no heating, but, also a lot of ripple.
The ripple voltage is depending of the input voltage, 9-21V, its about 100mV, and low frequency, 21V-24V ripply amplitude jumps up to some hundrets of millivolts, at 24V amplitude drops and frequency rauses, at 28V its quite nice.
Any idea? I add a big capacitor to the output, but no change.
I have some files, showing the workbench output, the realization, and shots of the scope, but no chance to include this files here.
Thanks for helping.
With best regards
Gerhard