Output voltage greater than 36V using TL431 ?
Hi There,
I'd like to know what are the alternatives for the feedback network on a SMPS with Vout greater than 36V.
As TL431 supports 36V at most, would it work fine if I place a series zener? For example, for a 40V SMPS I may calculate the TL431 as if it would work on a 31.6V SMPS and then place an 8.4V zener in series.
Thank you in advance.
Best Regards!
Comments
Great. Thank you very much!
Hello Again,
So, my PSU will be 41V. I would like to know, which one of the two options on the attached image would be the correct form to place the zener series diode.
Thank you very much!
I would recommend option 1.
Z. Cochrane
Hello Cochrane, thank you very much for your quick reply! I'm opening a new thread now for design review, I would be pleased if you could take a look at it.
Best Regards and happy new year!
A series zener will work. You want to verify the power dissipation on the components.
Z. Cochrane