- Ask a related questionWhat is a related question?A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
Original question:
Hi all, One of my customer use LM3478 to control non-isolated flyback, the primary and secondary have the same gnd. Vin=12V, Vo=18V/1A, f=100kHz. when there is no load in the output, the Vin will be pull into a very low vaule, <1V, the output voltage is abnormal.
When changing the Rsn from 50m to a higher value, the output will be normal, but the max power output will be limited, the max output power will be 8W. Do you know what may cause this problem? And how to solve this issue? Thanks a lot!
Yellow -DR
Green- Rsn
