DN05060/D, Input Over Voltage Protection Design Circuit

DN05060/D, Input Over Voltage Protection Circuit. Overvoltage events on the power grid can be thought of in broad terms as impulse-like or long term. Impulse events are well understood and there are a range of surge suppression techniques (ex: TVS, MOV etc.) utilized by power supply designers. Longer term excess voltage events are typically due to poor regulation or faults in the power grid and can exceed 300 Vac and last for hours or be less than 50 msec in duration. Some form of mitigation is required in order to provide a reliable system with a long service life. This is especially true in applications like outdoor LED lighting