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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

mosfet switching

  1. S

    UC3842 based SMPS mosfet probelm

    i made 220V AC to 12V DC 5A SMPS based on UC3842 using forward converter. schematic attached. supply's output voltage is ok and on no load (except indication led) pwm duty cycle is 1.1% with no mosfet heating (IRF740), but when loaded with even a little load of < 500mA, mosfet heats up although...
  2. A

    P-Channel MOSFET always on

    Hello I am using a MOSFET driver circuit with SI2303 as p-channel mosfet and SI2302 as n-channel mosfet. I have given control signal (of 5V) on the gate of n-channel mosfet to turn-on and off the p-channel mosfet. However, the p-channel mosfet is not getting off and I am constantly finding...

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