LED drive circuit
A circuit and control circuit technology, which is applied in the field of high power factor non-isolated LED drive circuits, can solve the problems of reducing circuit efficiency and achieve low cost, meet power factor and harmonic requirements, and high reliability.
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[0027] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] see figure 2 , shows the drive circuit structure of the present invention, the drive circuit includes an input filter circuit 21 , a rectifier bridge 22 , a power factor correction circuit 23 , a control circuit 14 and a constant current output circuit 25 .
[0029] The positive end of the AC input is connected to the filter circuit 21 through the fuse F1. The filter circuit 21 includes an inductor L1 and a capacitor C1. One end of the inductor L1 is connected to the fuse F1, and the other end is connected to the input end of the rectifier bridge 22; one end of the capacitor C1 is connected to the inductor L1 and the fuse F1. common end, the other end is connected to the common end of the AC input negative end and the rect...
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