SG3525 based DC -DC converter repair

This video is about understanding the working and repair process of a broken DC to DC converter using the very popular SG3525 PWM IC.Here I show the faults and shortcomings of the circuit and the required fix to get the circuit working again.
If you like this video, give it a like and share your thoughts in the comments section below.
Link to my SG3525 based inverter series:
• DIY 200W Inverter Part...
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#electronics #inverter #SG3525

[@sayantanmaiti2513]

Very good repair👌

[@kubendranganess-ds6ch]

Hello is there any other way to shutdown sg3525 I tried grounding pin 10 I'm using it in a smps control circuit with ne555 when I ground pin 10 the light bulb that I put in place of the fuse glows bright when I remove the jumper wire that is connected to ground and pin 10 the control circuit just remains in shutdown mode with the red light on in the control circuit and the light bulb goes off but there is no output on this pwm chip ,any help will be greatly appreciated.

[@TheJavaSync]

13:32- on 2nd board, there is no need final transformer?

[@UtsavShah_25]

No that board is a H bridge module which is used to convert high voltage DC to square wave AC

[@raghuram3296]

Hey in this board how to add a feedback loop to the switching IC. The diagram you had prepared has feedback connected to pin. 1 and pin 2, while here those pins seem to be already used up. Can you help pls?

[@UtsavShah_25]

Pin 2 is connected to the internal reference voltage of the IC while pin 1 is connected to the resistor voltage divider network that is across the points XY which is the output voltage so feedback is connected to pin 1. You can see it is tagged with the letter A

[@raghuram3296]

Thanks bro. What is the role of pin 9 with the resistor and capacitor across. Any specific role? TIA

[@VELMURUGAN-Singarayar]

Circuit diagram

[@faiyazkhan9133]

Zenar diod velu kitna hai isme

[@UtsavShah_25]

No zenar diode present for this circuit