UC3525A: Please provide calculator or design example for feedback loop compensation

Hello Venkateswara

Please send us a plot of Vout during while this audible noise is happening. If there is a sinusoidal oscillation present at the audio frequency then the loop may be unstable. If the oscillation is not sinusoidal then the loop response is not the problem.

Please also post a plot of Vout when you make a step change in the load - from 50% to 75% for example,

Please have a look at the material at the following links.

http://www.ti.com/lit/ml/slup098/slup098.pdf 

https://www.ti.com/seclit/ml/slup113/slup113.pdf

https://training.ti.com/control-smps-refresher?keyMatch=REFRESHER&tisearch=Search-EN-everything

Regards

Colin

Hello Venkateswara,

I hope you have made progress on your project. Since there has been no activity on this post for a number of days now I am going to close this post. Please open a new post if you have more questions.

Regards

Peter