The function principle and characteristics of LEM current sensors and the applicati on in the de-tection and protection of switching power supply are introduced in this paper.

• 介绍LEM电流传感器的工作原理、特性以及在开关电源电流检测及过流保护中的应用,给出了由LEM电流传感器组成的几种检测与保护电路结构。