Electronic Design

Simple Change Enhances Safety, Integrity of Isolated Shunt-Regulator DC-DC Converter (.PDF Download)

Sept. 8, 2016

Did you know that your shunt regulator is in danger? Don’t worry—the fix is free (and free is good).

A feedback circuit commonly used in isolated dc-dc converter applications uses a shunt regulator (such as the ATL431) and an optical isolator to feed the output voltage back to the pulse-width-modulator (PWM) controller. This circuit is effective and easy to use. However, few designers are aware of the hidden electrostatic discharge (ESD)/electrical overstress (EOS) danger this poses...

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