I have been working on a universal power supply prototype as my final year project using the IRIS4009 aiming to produce a 12V, 1A output.
As far as my test run goes, a voltage test at the output without any load connected gives me around 10.8-11.6V which seems fine to me.
But the weird part happens when I attempt to attach a small value resistor (from a few to tenths of ohms), the output voltage at the load just drops down to zero, giving totally no output. But when I take away the load, the output slowly rises back to 10.8-11.6v.
So, I don't really understand which part of the circuit, whether is the feedback, primary side or secondary side giving me the trouble. Does anyone have any clue which part is it to blame, and how to pin-point which component went wrong? And is it possible that using the wrong parameters for the circuit caused it?
Thanks.
As far as my test run goes, a voltage test at the output without any load connected gives me around 10.8-11.6V which seems fine to me.
But the weird part happens when I attempt to attach a small value resistor (from a few to tenths of ohms), the output voltage at the load just drops down to zero, giving totally no output. But when I take away the load, the output slowly rises back to 10.8-11.6v.
So, I don't really understand which part of the circuit, whether is the feedback, primary side or secondary side giving me the trouble. Does anyone have any clue which part is it to blame, and how to pin-point which component went wrong? And is it possible that using the wrong parameters for the circuit caused it?
Thanks.
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