小功率开关电源的研制  

Small Power Switch Power Supply Design

作　　者：于伟庆[1] 

机构地区：[1]大连理工大学电信学院自动化系,大连116024

出　　处：《电源世界》2006年第3期8-10,40,共4页The World of Power Supply

摘　　要：开关电源被誉为高效节能电源,它代表着稳压电源的发展方向,现已成为稳压电源的主要产品。本文研制的开关电源主要应用NCP1200芯片来构成PWM电路。NCP1200器件是一种单片开关电源芯片,它除了一般的PWM控制功能外,还集成了过压保护、过流保护等功能。该电路可抑制各种感性负载切换或各种瞬间噪声在电路板中产生的浪涌电压和空间电磁场的干扰。Switching Power Supply is regarded as high-energy efficiency supply. It stands for the development of steady supply. It has become the main product of the power supply now. The supply uses NCP1200 as PWM circuit. It is a new type of integrated chip. Except for pulse width modulator （PWM）, its internal functions include start-up bias-current murce, over voltage protection, over current protection. In the circuit it has suppression of Inductive Switching of other Transient Events such as Surge Voltage at the circuit board level.

关 键 词：单片开关电源 PWM NCP1200 EMI 浪涌电压 

分 类 号：TM92[电气工程—电力电子与电力传动]