基于LT1244的单端反激式开关电源设计  

Design of Fly-back Switch Mode Power Supply Based on LT1244

作　　者：谢秀镯 张云鹏 田志 

机构地区：[1]北京中电科电子装备有限公司,北京100176

出　　处：《电子工业专用设备》2014年第1期35-38,共4页Equipment for Electronic Products Manufacturing

摘　　要：开关电源的控制电路可以分为电压型和电流型,电流型开关电源具有更好的电压和负载调整率,系统的稳定性和动态特性得以明显改善。给出了一种用于电机控制的新型多输出反激电源的设计,介绍了LT1244(电流控制型脉宽调制器)的工作特点,利用LT1244设计了单端多输出反激式开关稳压电路,分析了工作原理,并对反激式开关电源中高频变压器的参数进行了详细的计算与说明。最终使输出电压能够很好地稳定,电压调整率和负载调整率都较高。With the development of electronic technology,switching power supply with its high efficiency,smallsize has been widely used.Switching power supply controlcircuitcan be divided into voltage-and current-mode, current-mode switching power supply with better voltage and load regulation,stability and dynamic characteristics of the system can be significantly im proved. This paper presents a new multi-output flyback power supply design for motor control,introduces the LT 1244 (current controlled pulse width modulator) job characteristics,the use of a single-ended design LT 1244 multiple output flyback switching regulator circuit analysis of the works,and the flyback transform er high-frequency switching power supply param eters were calculated with detailed instructions.And finally to the output voltage can be well stable voltage regulation and load regulation are higher.

关 键 词：电流控制型脉宽调制器(LT1244) 单端反激式开关电源 高频变压器 电流型脉宽控制器 

分 类 号：TN761[电子电信—电路与系统]