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Thread: IR2153 HO doesn't switch

  1. #21
    diysmps Senior Member
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    remove the output choke at the secondary, u dont need it for unregulated power supply.

  2. #22
    .... Silvio's Avatar
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    Quote Originally Posted by norazmi View Post
    im enjoying high quality class d amp now lol tl494 hahahaha, running at 212khz, with irfz44n at +52vdc and 0. this is single supply amp. high freq more efficiency means less distort
    Tell us more about your project maybe a schematic will help us more to understand .

  3. #23
    Removed choke, same issue. Removed transformer, placed a small bulb in place of the primary, it doesn't light up but the limiting bulb does

  4. #24
    diysmps Senior Member
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    ok now lets go deep into your smps, tell me rt ct of your circuit, tell me what core size you are using and tell me primary winding of your core also, let see what u got, we will solve this issue.

  5. #25
    diysmps Senior Member
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    change 2.2uf 275 v to 1uf 400v , 2.2uf is bad start for your circuit, too big in rush current, i think D3 is refer to aux supply, ok here if you have external supply 12vdc put it there or clamp with big resistor from main after rectified with 40kohm 5watt, the aux supply is overkill without current limit resistor 100 ohm 1 watt at least, 56k 2w clamp that resistor cannot stand for a long time may burn, to power up ir2153 need small current 5ma only, R2 and R3 neex 1n4148 each gate, and from the rt ct ur setting i can see you will have arround 60-62 Khz, if ur using EE35 from PSU, primary winding will be 46 CT, means 23 each side, do not wind secondary winding yet, just start with primary only and add rc snuber to primay pin 1 (start) and pin2 (end) with 100 ohm 2w and 680pf. do what i say, ill draw some circuit for you easy to understand.

  6. #26
    diysmps Senior Member
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    see this circuit and do what i say above220v.jpg

  7. #27
    primary winding will be 46 CT, means 23 each side
    What do you mean by each side? I got 30T on the primary (60/2 from the forward formula).

  8. #28
    diysmps Senior Member
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    60 is ok, i make center but i dont connect the center, like psu pc supply i just connect at start and end, my circuit i give u above with short circuit, over current protection, it will never blow your mosfet.

  9. #29
    diysmps Senior Member
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    My ir2153 with softstart and protection, dual rail supply +- 110 vdc. never blown.


    bd229e89-fff3-4d1c-93c7-0f5b14aaf3d8.jpg

  10. #30
    diysmps Senior Member
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    its been made to powering up this beast

    class d amp.jpg

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