摘要
介绍了一种基于电流型PWM控制芯片UC3844实现的单端反激开关电源的原理,并进行了设计,主要介绍了变压器的具体参数的设计、损耗分析,设计采用了可调式精密并联稳压器TL431配合光耦构成电压反馈回路,并重点描述了该电路的反馈稳压的优越性。最后通过实验验证了参数设计的合理性,表明该电路具有良好的电压调整率、负载调整率和系统稳定性高等优点。
The principle of a single-end flyback switching power supply is introduced, in which uses the current mode control PWM chip UC3844, A design of this kind of switching power supply is proposed. It also presents a detailed method of designing parameters of the transformer and analyzing its power loss .The circuit adopts a feedback circuit with the adjustable precision shunt regulator TL431 and an optocoupler. The superiority of this feedback method is described in detail. At last, an experiment is carried on, and it validates the rationality of the parameter design. It also shows that this circuit have many advantages, such as good voltage regulation ,good load regulation, and high stability .
出处
《电源技术应用》
2008年第4期17-21,共5页
Power Supply Technologles and Applications
