Jump to content
Electronics-Lab.com Community

Help...problem with test circuit of SG3524..with duty ratio.


Recommended Posts

This is one of the test circuits given in datasheet of SG3524, with a little modification, mostly insignificant, like changing the value of inductor and using just one BJT instead of 2, as given in datasheet. I am not getting any output there. The expected % volts is not there. The signal out of pin 13 has a duty ratio of almost 0. What could the reason be. What possible mistake have I made. Even if I change the voltage at pin 2 (off course remove this voltage divider and put a rheostat), I dont find any change in duty ratio.
Also once it happened, in another occasion that I was getting 2 volts at that point once I switched on the circuit and that voltage remained there even after i switched off the power supply. What could be a reason for this.
The circuit is built on a bread-board. So its a little lousy, but there were no loose-wires.
I am posting the circuit diagrams. The first file is the circuit i have built and the second file is the test circuit given in datasheet of Texas Instruments.



Link to comment
Share on other sites

  • 2 months later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...