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  • norazmi's Avatar
    Yesterday, 08:39 AM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    its been made to powering up this beast :D
    29 replies | 334 view(s)
  • norazmi's Avatar
    Yesterday, 08:28 AM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    My ir2153 with softstart and protection, dual rail supply +- 110 vdc. never blown.
    29 replies | 334 view(s)
  • norazmi's Avatar
    Yesterday, 08:19 AM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    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...
    29 replies | 334 view(s)
  • bogdan2011's Avatar
    Yesterday, 08:11 AM
    What do you mean by each side? I got 30T on the primary (60/2 from the forward formula).
    29 replies | 334 view(s)
  • norazmi's Avatar
    Yesterday, 07:50 AM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    see this circuit and do what i say above
    29 replies | 334 view(s)
  • norazmi's Avatar
    Yesterday, 07:41 AM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    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...
    29 replies | 334 view(s)
  • norazmi's Avatar
    Yesterday, 07:31 AM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    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...
    29 replies | 334 view(s)
  • bogdan2011's Avatar
    Yesterday, 07:19 AM
    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 :confused:
    29 replies | 334 view(s)
  • Silvio's Avatar
    Yesterday, 07:15 AM
    Silvio replied to a thread IR2153 HO doesn't switch in diysmps
    Tell us more about your project maybe a schematic will help us more to understand .
    29 replies | 334 view(s)
  • norazmi's Avatar
    Yesterday, 06:48 AM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    remove the output choke at the secondary, u dont need it for unregulated power supply.
    29 replies | 334 view(s)
  • bogdan2011's Avatar
    Yesterday, 05:19 AM
    This is true, my test bench variac can't hold the current drawn by the power supply, so the voltage drops quite significantly. But then without the...
    29 replies | 334 view(s)
  • Silvio's Avatar
    04-07-2020, 07:24 PM
    Silvio replied to a thread IR2153 HO doesn't switch in diysmps
    That is quite normal and the reason is that the high side is charged from the capacitor and not from direct dc. In circuit it would behave...
    29 replies | 334 view(s)
  • norazmi's Avatar
    04-07-2020, 02:47 PM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    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...
    29 replies | 334 view(s)
  • norazmi's Avatar
    04-07-2020, 02:45 PM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    that zener is 1n4148 sorry i forgot to mention
    29 replies | 334 view(s)
  • norazmi's Avatar
    04-07-2020, 02:44 PM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    first, on control board put zener diode, gate resistor must be 22ohm and above for irf740, zener need each gate hi and lo, and bootstrap caps change...
    29 replies | 334 view(s)
  • norazmi's Avatar
    04-07-2020, 02:38 PM
    norazmi replied to a thread IR2153 HO doesn't switch in diysmps
    im sorry late reply wait i see your circuit, this smps ir2153 is very simple and easy to make, but the condition for test run must use light bulb,...
    29 replies | 334 view(s)
  • bogdan2011's Avatar
    04-07-2020, 09:30 AM
    These are the waveforms of the test circuit. For some reason, the high output is lower in amplitude. I've measured it both referenced to ground and...
    29 replies | 334 view(s)
  • Silvio's Avatar
    04-07-2020, 07:34 AM
    Silvio replied to a thread IR2153 HO doesn't switch in diysmps
    @Bogdan 2011, With the video that I saw and also the changes you have made it seems that there could be something wrong somewhere. It also could...
    29 replies | 334 view(s)
  • stewin's Avatar
    04-06-2020, 03:32 PM
    like which colour and size of core sir?
    124 replies | 34093 view(s)
  • brewboy's Avatar
    04-06-2020, 11:53 AM
    brewboy replied to a thread Help !! SMPS Repair in diysmps
    I realize this is a very old post, but I'm struggling with, what I think is, the same problem, Just wondering if you ever found out what was replaced...
    34 replies | 15771 view(s)
  • bogdan2011's Avatar
    04-06-2020, 08:02 AM
    I've added 33ohm gate resistors and 10k discharge resistors. Now the high side looks better but I still get a large current flowing. I've also added...
    29 replies | 334 view(s)
  • Silvio's Avatar
    04-06-2020, 07:23 AM
    Hi I can see it is an smps with power factor correction at the input. As MicorsiM said a picture which can show the oscillator and also the pfc chip...
    2 replies | 35 view(s)
  • MicrosiM's Avatar
    04-05-2020, 10:46 PM
    It looks to me its based on some FSFR chip. However, you have to fix the standby power supply, then you have to check the main power supply. If...
    2 replies | 35 view(s)
  • Argon's Avatar
    04-05-2020, 07:51 PM
    I need some help to diagnose this SMPS. I have repaired a few in the past by getting lucky. This one is important to me and I would like to learn a...
    2 replies | 35 view(s)
  • MicrosiM's Avatar
    04-05-2020, 01:14 PM
    NCP1635 is not the best choise chip for PFC, but you could experiment with it. Cores from https://www.mag-inc.com/ will do the job perfectly, look...
    124 replies | 34093 view(s)
  • Silvio's Avatar
    04-05-2020, 08:49 AM
    @ Steven Quote @ silvio what core may i use and how many turns should i turn? i have lots of iron powder cores t130-10(black core) t130-26(white...
    124 replies | 34093 view(s)
  • stewin's Avatar
    04-04-2020, 04:58 PM
    hello there norazmi , long time man welcome back. i am trying to in-cooperate pfc with my smps , because i dont use regulated smps , at times when...
    124 replies | 34093 view(s)
  • Silvio's Avatar
    04-03-2020, 10:44 AM
    Silvio replied to a thread IR2153 HO doesn't switch in diysmps
    This is a very basic circuit that I see. What is not appropriate is that the gate resistors should not be less than 22 ohms I guess 27 ohms will be...
    29 replies | 334 view(s)
  • bogdan2011's Avatar
    04-03-2020, 04:42 AM
    PSU: Controller board:
    29 replies | 334 view(s)
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