what is wrong with this circuit?
Thanks for your comment luka
I was just thinking that a circuit with only 1 mosfet is simpler than one with 2 or more. I know it doesn't make sense. 😀
But that led me to analyse my original smps circuit I mentioned in the previous post. In theory it looks fantastic and more robust than my ATX PSU. But practically other way round, It becomes hot even on no load. I had 2 of them and one just blew up. I could not find the reason. I think they are current limited, so shortcircuiting the output doesn't pose a problem, but there has to be something else wrong, which I couldn't figure out. (The burned out one had both mosfets, the mains rectifier and mains fuse blown out) 😕
I am attaching the ouput section of the circuit (apology for the low quality drawing) which took me 2 hours to figure out. The module's aluminium body (19cm x 13 cm) is attached to heat sink, which should be able to disspate several watts easily. Still the whole thing beomes very hot to touch and the output voltage becomes inconsistent, much worse than my 'simple' ATX PSU.
Could anybody analyse the circuit and comment on the possible flaw with it, which might be causing it to be unstable.
Thanks
Thanks for your comment luka
I was just thinking that a circuit with only 1 mosfet is simpler than one with 2 or more. I know it doesn't make sense. 😀
But that led me to analyse my original smps circuit I mentioned in the previous post. In theory it looks fantastic and more robust than my ATX PSU. But practically other way round, It becomes hot even on no load. I had 2 of them and one just blew up. I could not find the reason. I think they are current limited, so shortcircuiting the output doesn't pose a problem, but there has to be something else wrong, which I couldn't figure out. (The burned out one had both mosfets, the mains rectifier and mains fuse blown out) 😕
I am attaching the ouput section of the circuit (apology for the low quality drawing) which took me 2 hours to figure out. The module's aluminium body (19cm x 13 cm) is attached to heat sink, which should be able to disspate several watts easily. Still the whole thing beomes very hot to touch and the output voltage becomes inconsistent, much worse than my 'simple' ATX PSU.
Could anybody analyse the circuit and comment on the possible flaw with it, which might be causing it to be unstable.
Thanks
- Status
- Not open for further replies.