Power conversion circuit for LED driving

The invention discloses a power conversion circuit for LED driving. The power conversion circuit comprises an AC power supply, a first switch tube and a second switch tube, wherein one end of the AC power supply is connected with a positive electrode of a first diode, and a negative electrode of the first diode is connected with one end of the first capacitor, a second resistor, a third resistor,a second capacitor and one end of a primary winding. In the power conversion circuit, a few components are used, the power conversion circuit is simple in structure and low in cost, stable-voltage output can be achieved, a current of a switch is limited, and the power conversion circuit is prevented from being burnt due to excessive large current and is suitable for promotion. 本发明公开了种用于LED驱动的电源变换电路，包括：交流电源，第开关管、第二开关管，交流电源端与第二极管正极相连，第二极管负极与第电容的端、第二电阻、第三电阻、第二电容以及原边绕组的端相连；本发明的电源变换电路，所用元器件少，结构简单，成本低廉；不仅能实现稳压输出，限制了开关的电流，防止电流过大而烧毁，适用推广。