摘要
针对现代电子设备对直流电源的要求越来越高,设计了一种AC-DC开关电源,输出电压为12 V电流5 A。设计中以UC3842为PWM控制器,首先将交流电直接变换为直流高压,然后采用反激变换器设计电路,利用线性光电耦合器、三端可调稳压管以及输出采样电阻构成输出电压反馈电路。对电路测试结果表明设计电路满足设计要求,具有精度高、纹波小、效率高、性能可靠等优点。
According to the modern electronic equipment is more and more high to the requirement of DC power supply , t his paper design an AC-DC switching power supply , output 12 V voltage and 5 A current. The design is Based on UC3842 PWM controller , first , the alternating current （AC） directly convert the DC high voltage , , and then circuit is designed by flyback converter , 1 inear photoelectric coupler , three- terminal voltage regulator tube , and output sampling resistance constitute output voltage feedback circuit. The test results show that the designed circuit meet the requirements , the switching power sup-ply hashigh precision,small ripple,high efficiency and high reliable.
出处
《电子设计工程》
2017年第24期148-151,156,共5页
Electronic Design Engineering
基金
院级政校行企合作开展科研与服务项目(ZXHQ2014d004)
