AN708 Datasheet (Vishay Siliconix) - Low-Power Universal-Input Power Supply Achieves High Efficiency

AN708, Low-Power Universal-Input Power Supply Achieves High Efficiency

AN708 Vishay Siliconix Low-Power Universal-Input Power Supply Achieves High Efficiency Expanding global markets have created a demand for what have become known as universal-input power supplies that is, power supplies that allow devices to be plugged into wall outlets anywhere in the world.

These power supplies must be able to operate directly from 100-, 110-, and 220-V ac power lines without the use of selector switches or jumpers.

A power supply with the ability to operat

AN708 Features

* full VDE isolation, primary side regulation, and true foldback current limiting. Operating frequency is 100 kHz. DCM flyback operating principles are generally well understood and will not be presented here. Refer to Vishay Siliconix Application Note AN707 for a detailed design example. References 2