Recent content by saqib

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    UC3842 SMPS short circuit protection

    I have another concern that mosfet IRF740 is heating a lot even for a primary current of almost 0.21A (which i calculated from voltage drop of 48mV across sense resistor which is still 0.22R). although this mosfet is rated for 10A continuous current. as for now i am only testing this supply so...
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    UC3842 SMPS short circuit protection

    Thanks a lot for quick reply. :). i was just trying to avoid increasing sense resistance preoccupied by the idea of heat losses without going into I2R calculations first. OK i should try this 4.7R resistance now. regarding the divider resistors, i didn't use it as i am not sure that a preset...
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    UC3842 SMPS short circuit protection

    i designed 230V AC to 12v 5A SMPS based on UC3842 forward converter, which works fine but i want output short circuit or overcurrent protection through pin 3 but as my current sense resistor is on the primary side so primary side equivalent of 5A never reaches enough to give 1V to pin 3 and thus...
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