SCR resonance half-bridge based LED streetlamp drive power circuit

The utility model discloses an SCR resonance half-bridge LED streetlamp drive power circuit, which includes a lightning protection circuit and an EMI filter, a power factor correcting circuit, an SCR resonance half-bridge circuit, a synchronous rectification circuit, an output filter circuit, a protection circuit, an SCR resonance controller, a starting circuit, an DC input filter circuit, a constant current drive circuit and a microprocessor. The utility model can realize the simple and cost-benefit circuit design, provide conveniences for modularization and standardization, complete the protection function, and have the characteristics of fewer elements and simple and reliable circuit realization.