Can I read TL431 Optocoupler Feedback Design Tips on EtoBox?

TL431 Optocoupler Feedback Design Tips by Maikel Ochoa is a document available to read on EtoBox.

What is TL431 Optocoupler Feedback Design Tips about?

This document discusses properly biasing an optocoupler in an isolated feedback network for an isolated power supply. It provides a three-step design procedure: 1) determine the dynamic operating range of the feedback pin, 2) calculate the worst-case current transfer ratio of the optocoupler, and 3) set the value of R1 to ensure the TL431 can drive enough current in the optocoupler. Neglecting tolerances could result in overvoltage conditions at higher temperatures due to the optocoupler being current-starv

Author

Maikel Ochoa

Language

EN