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Recent content by usama14

  1. U

    PMOS load switch circuit issue

    My circuit is working well after thorough testing uptill now with quite low heat dissipation. Thnx for ur kind inputs.
  2. U

    PMOS load switch circuit issue

    Kindly guide me how much max power then this mosfet can bear with a heat sink?
  3. U

    PMOS load switch circuit issue

    Ah I see. I am using a 1.2 x1.4cm heat sink. You mentioned the "12W can be too much for this FET". Isnt the Mosfet IRF5210 rated for 200W at room temperature? So it should handle this? No? Correct me if I'm wrong kindly. Also, what do you propose the solution then? How should I limit the...
  4. U

    PMOS load switch circuit issue

    Its mentioned here: https://www.onsemi.com/pub/Collateral/AND9093-D.PDF Also the 120 ohm load draws 0.4A and that is a stable current value, not inrush. The simulations show inrush of 0.3 to 0.4A max. - - - Updated - - - Sorry I could'nt get your point, kindly explain a little. The...
  5. U

    PMOS load switch circuit issue

    Hi all. I'm working on a load switch circuit that drives a capacitive load of 1000uF and a GAN transistor in parallel. The schematic of the circuit is attached. The input voltage is 50V and the Pmos being used is IRF5210. The simulations show promising results(also catering the inrush currrent...
  6. U

    LTC 4367 Transistor burning Issues

    Yes exactly. Thats why i left the source pins open. Now coming back to the issue, any suggestions?
  7. U

    LTC 4367 Transistor burning Issues

    Source connection is left open as this transistor is connected in a back to back common source configuration as shown below. Also whose maximum rating are you talking about? The transistors? I am testing my setup in Airconditioned environment with fast speed fan.
  8. U

    LTC 4367 Transistor burning Issues

    Hi all. I'm using LTC4367 for reverse polarity, OV and UV protection. I'm using the FDMD84100 Dual N channel Mosfets and the input voltage is 50V. However, when connected without any load, the output voltage is all OK at the beginning but then it gradually decreases towards zero. Also my...
  9. U

    SG3525 based Push-Pull converter Feedback

    Thankyou. I'll design it without the isolation and then discuss with you. :)
  10. U

    SG3525 based Push-Pull converter Feedback

    I wanna give this output to a microcontroller based SPWM Full bridge Inverter circuit. So, do I require isolation or not?
  11. U

    SG3525 based Push-Pull converter Feedback

    Hello Everyone. I am gonna design a Push-Pull dc dc converter converting 48V to 330Vdc based on the Tahmid's blog as below. My questions are: 1) Do I have to use isolation in the feedback, for example through opto-couplers, to isolate the higher voltage secondary side from the primary side? Or...
  12. U

    LC filter in the Sinewave Inverter

    Thankyou. :) Also, the inductance of the motor is 30mH. So, dont you think it will distort the waveform and drop hell of the voltag too? I am not regulating the dc dc stage right now either. - - - Updated - - - Yes, I isolated the ground point from the plug by using 2 pin connector.
  13. U

    LC filter in the Sinewave Inverter

    Success IT IS I was successfully able to make my project working again. The problem was not of the filter or anything. It was the unproper grounding in the building I'm working at. The ground is giving a freaking 90V and I had to isolate my project from it. And it worked perfectly. :) Now the...
  14. U

    LC filter in the Sinewave Inverter

    I am currently using this combination. I tried increasing the "C". But the output gets shortened dur to unknown reasons :/ (Also, yesterday I couldnt get the same results either, that is, everything was shortening out when the capacitor was connected. Then dont know after 4 hours of...
  15. U

    LC filter in the Sinewave Inverter

    You're saying that Its okay attach a resistor in series? But It is dropping hell of output voltage :/

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