摘要
Abstract
In order to meet the RFID product requirements for power supply of minimized,can be integrated,a switch mode power supply(SMPS)is designed based on current mode PWM chip UC3842 using flyback topology.Analyzed principle of flyback switching power supply.Fast response and precision output control is achieved by isolated output feedback connection.Introduced surround-ing snubbering circuits,grounding circuits and slope compensation circuit to stabilize current os-cillation when duty cycle is over 50%.Analyzed the relationship of output impedance of input filter and input impedance of converter and possible oscilla-tion.The design is optimized through theoretical a-nalysis.Used Saber for simulation,PCB design is optimized based on RFID board.Test results and test results through RFID shows that,the designed single ended flyback SMPS has the advantage of small size,low output rippling,output stable.关键词
电/流/型 PWM 芯/片 UC3842/斜/率/补偿/电流震荡/Saber 仿真/RFID 联合调试Key words
current peak mode PWM chip UC3842/slope compensation/current oscillation/saber simulation/RFID and power supply testing分类
信息技术与安全科学
