AN604的电源整流器的传导损耗的计算

AN604的电源整流器的传导损耗的计算

AN604
Application note

Calculation of conduction losses in a power rectifier

Introduction
This application note explains how to calculate conduction losses in a power diode by taking
into account the forward voltage dependence on temperature and the current waveform.
The ideal current and voltage waveforms of an ultrafast diode in a power supply system
during a switching cycle are shown in Figure 1.

Figure 1. Ideal current and voltage waveforms of a diode in a switch mode power
supply