New type high-power LED driving power source

Abstract

The invention discloses a new type high-power LED driving power which comprises a protection filtering rectification and a PFC circuit, the input ends of the protection filtering rectification and the PFC circuit are connected with the power source, the output ends of the protection filtering rectification and the PFC circuit are connected with a half-bridge series-resonance circuit the output end of which is connected with a synchronous rectification circuit, the output end of the synchronous rectification circuit is connected with a current sampling circuit and a voltage sampling circuit, one path output of the current sampling circuit is connected with load, the other path output of the current sampling circuit is connected with a same-phase amplifying circuit, one path input of a same phase summer circuit is connected with the output end of the same-phase amplifying circuit, the other path input is connected with a control signal of an external output circuit, the output ends of the same phase summer circuit and the voltage sampling circuit are connected with the input end of a feedback control circuit together, and two path outputs of the feedback control circuit are respectively connected with the half-bridge series-resonance circuit and the synchronous rectification circuit, the new type high-power LED driving power of the invention can regulate the size of the output current according to the external control signal, can regulate light intelligently, maximizes the realization of energy conservation and energy consumption reduction, and has the advantages of high conversion efficiency, low temperature rise and permanent constant current output and the like.

Description

technical field [0001] The invention is a new type of high-power LED drive power supply with high efficiency and adjustable output current within a certain range, which belongs to the constant current controller in the LED lighting system and is used as a driver for other occasions requiring constant current drive. Background technique [0002] Under the background of rising concerns about the current global energy shortage, energy conservation is an important issue in the future. In the field of lighting, the application of LED light-emitting products is attracting the attention of the world. As a new type of green light source product, LED has high energy saving (the same lighting effect is more than 80% energy-saving than traditional light sources), long life (the service life can reach 6 10,000 to 100,000 hours, more than 10 times longer than traditional light source) and other excellent characteristics are bound to be the trend of future development. Therefore, the driv...

AI Technical Summary

Problems solved by technology

At present, there are few traditional isolated AC / DC switching power supplies and LED dedicated constant current power supplies, and their efficiency is relatively low, and most of them have no dimming interface.

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