基于L4978的仪器仪表电源的设计与实现  

Design and realization of the power supply of apparatus and instruments based on L4978

作　　者：万琰[1] 郑冬强[1] 

机构地区：[1]漯河职业技术学院机电工程系,河南漯河462002

出　　处：《工业仪表与自动化装置》2009年第4期97-99,共3页Industrial Instrumentation & Automation

摘　　要：针对仪器仪表设备电源电路的特点，以单片开关式DC／DC变换器L4978为核心，设计了一种3．3～55V可调式开关电源。介绍了开关电源和L4978的工作原理，给出一种典型应用电路设计与器件选用的方法。电路具有小体积、高效、低功耗等特点。In view of the characteristics of the power supply circuit of apparatus and instruments, a kind of 3.3 - 55 V adjustable switching power supply was designed with a single - chip power converter L4978 as its core. The paper introduces the on - off power supply and the makeup and principle of L4978, and also gives the design of a typical applied circuit and the method of the element selection. The circuit is characterized by its small size, high efficieny and low power consumption.

关 键 词：仪器仪表 开关电源 L4978 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]