The design of Flyback switching supply power
Abstract:With the development of power electronics, switching power supply used more and more widely. Flyback switching power supply with its simple design, small size and other strengths, is widely used in low power situations. Switching power supply with its small, light weight and high efficiency characteristics, is widely used in various electrical equipment and systems, the merits of their performance is directly related to the realization of the whole system functions. There are many types of switching power supply, including single-ended flyback switching power supply With simple circuit, the fewer components needed, can provide multiple advantages, such isolated output is widely used in low-power power supply field.
Conventional flyback switching power supply generally PWM control chip (such as the UC3842) and power switch (usually used at high frequency MOSFET) formed, it is composed of input ctifier ilter circuits,lamp a protection circuit,high-frequency transformer,tput rectifier,filter circuit,eedback circuitlation driving circuit and circuit.
In addition, the design of the flyback transformer and a difficult, which often leads to power supply design cycles. With the PI produced by TOPSwitch represented the advent of new generation single-chip switching power supply, over a number of problems have been well resolved. Application of TOPSwitch-HX design switching power supply, not only fewer devices, the structure is more simpleLess heat, more reliable, use the chips has become a highly efficient switching power supply design.
Keywords : TOPSwitch-HX Flyback converter highf requency transformer switching power supply
