Switching power supply techniques which transform the electrical energy using the power converter,can meet the various electricity requirements,after transform the electrical energy. high efficiency and energy saving can brings tremendous economic benefits, so that it caused all sectors of society’s attention and is promoted rapidly.The system’s control core is C8051F020, using PWM IC design of the UC3843 single-ended flyback switching power supply. It’s controlled by SCM, and to have a keyboard settings, step, liquid crystal display measurements, and other functions. Innovation system is switching to alternative energy storage inductor circuit transformer to achieve simple, The output voltage adjustment range becomes wilder from30-36V.The maximum output current is greater than 2 A,and ripple-peak voltage less than 0.9 V, and power efficiency is up to 80 percent.
Keywords: step-up; Switching power supply; circuit design; PWM