Suzhou Regu. Technology Inc.

Duoli Feng

Weidong Li

Tao Huang

Shengming Huang

Tian Guo

A drive circuit for flicker-free LED lighting having a high power factor, the circuit comprising a start-up circuit, a controller, a transformer T, a first current switch, and a second current switch. The transformer Tcomprises a main primary winding Np, a primary winding Np, a primary winding Na, and a secondary winding Ns. The main primary winding Npand the primary winding Npare in-phase, the primary winding Na and the secondary winding Ns are in-phase, and phases of the main primary winding Npand the secondary winding Ns are inverted. The start-up circuit and the transformer Tare connected to an input terminal Vin. The start-up circuit, the first current switch, and the second current switch are connected to the controller. The controller controls, by means of controlling the first current switch, and the second current switch to turn on or off, an output current of the secondary winding Ns of the transformer T. The drive power supply circuit for LED lighting having a high power factor reduces ripples in an output current, thereby realizing advantages of a high power factor, being flicker-free, and having a low cost, etc., for LED lighting.

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Suzhou, China

Duoli Feng