| 一种基于UC3842的新型开关稳压电源设计 |
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| 引用本文： | 衡耀付,陈富军. 一种基于UC3842的新型开关稳压电源设计[J]. 电力自动化设备, 2009, 29(9) |
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| 作者姓名： | 衡耀付 陈富军 |
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| 作者单位： | 黄淮学院,电子科学与工程系,河南,驻马店,463000;黄淮学院,电子科学与工程系,河南,驻马店,463000 |
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| 基金项目： | 河南省科技厅科技攻关计划项目 |
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| 摘 要： | 设计了一种以电流型PWM控制器UC3842芯片为核心的高频单端反激式开关稳压电源.基于信号流程和电路功能模块划分,利用三端稳压器TL431配合新器件UC3842实现了对电源电压的控制和稳压输出.分析了新型开关电源的设计原理、各组成模块的功能以及工作过程.为了满足设计电源的电磁兼容性和安全性要求,设计利用低通滤波扼制了传导干扰,采用光耦器件PC817实现了输入/输出的隔离和反馈,并在电源电路中加入了热敏电阻、压敏电阻以及过压、过流保护等保护措施.实验测试结果表明:所设计的电源具有稳压性能优良,纹波小,电压调整率、负载调整率高等优点.
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| 关 键 词： | 开关电源 电流型PWM控制器 电压调整 负载调整 UC3842 电磁兼容性 传导干扰 |
Switching power supply based on UC3842 |
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| HENG Yaofu,CHEN Fujun. Switching power supply based on UC3842[J]. Electric Power Automation Equipment, 2009, 29(9) |
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| Authors: | HENG Yaofu CHEN Fujun |
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| Affiliation: | HENG Yaofu,CHEN Fujun(Huanghuai University,Zhumadian 463000,China) |
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| Abstract: | A high frequency single-ended flyback switching power supply is designed with current-mode PWM controller UC3842 chip as its core.Based on the signal flow and functional circuit modules,the voltage control and stable output are realized by using three-terminal voltage regulator TL431 with the new device UC3842.Its design principle,module functions and working process are analyzed.In order to meet the requirements of electromagnetic compatibility and safety,the low-pass filter is used to restrain the conduct... |
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| Keywords: | UC3842 |
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