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Thanks Tony, my scope broke two days ago. I will fix my problem and look at your suggestion. However, as you mention the difficulty of CT to produce the necessary voltage, I though to use a current sensor based on hall effect as those produced by allegro, like the ACS 712.
I build a Sepic converter around an UC3843 IC. The converter is suposed to work in continuous mode. The primary current, that passes through the Mosfet switch, is continuous. I try to use a current transformer because it is a high current and a sense resistor is unuseable, but current...
I just read the post. Could you please explain more in detail this statement ."Basic point is that when load current is small then power efficiency of PWM regulator is low". Thank you
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