摘要
论文介绍了PWM控制芯片M51995A的工作特性和原理,并以此为核心设计了一种新型开关稳压电源。介绍了开关电源的设计过程,利用三端稳压器TL431配合M51995A实现了对电源电压的控制和稳压输出,采用光耦器件实现了输入/输出的隔离和反馈。并在电源电路中加入了热敏电阻以及过压、过流保护等保护措施。测试结果表明,设计的开关电源稳压性能优良、纹波小、过载能力大等优点。
The paper introduces a new-type switching power supply with stabilized voltage, based on the working characteristics and principles of PWM control chip. The paper presents how to design this switching power supply--using M51995A with the support of three terminal regulator TL431 to achieve voltage eontrol,stablization and output of power supply, using optoeoupler to realize isolation and feedback of input/output. The design also adds safety precautions such as thermistance,overvohage and overeurrent preteetion. As the testing result shows, the switching power supply based on this paper＇s design has good performance in voltage stablization ,produced corrugation, overload.
出处
《科技视界》
2011年第27期58-59,27,共3页
Science & Technology Vision
