A High Power Factor Multi-channel Low Ripple Constant Current Output Switching Converter
A switching converter, high power factor technology, applied in the direction of converting DC power input to DC power output, output power conversion device, high-efficiency power electronic conversion, etc. The effect of high flow accuracy, simple control and low cost
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[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Based on the integrated Boost-Buck switching converter, the present invention proposes a brand-new high power factor multi-channel low ripple constant current output switching converter for LED driving. like Figure 8 As shown, the circuit diagram consists of a diode rectifier bridge D b , Input filter inductance L f , Input filter capacitor C f , the main inductance L m , Active switch S 1 , Energy storage capacitor C 2k-2 , Freewheeling diode D 2k-1 , output capacitance C ok and the branch inductance L k , k=1,2,...,n.
[0042] Diode rectifier bridge D b The input terminal of the circuit is connected to the AC power supply, and the upper output terminal is connected to the input filter inductor L in turn. f , the main inductance L m and active switch S 1 D pole; input filter capacitor C f One side is connected to the inp...
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