Highly-efficient drive circuit of light emitting diode (LED) Light Bars
A driving circuit and LED light group technology, which is applied in the direction of electric lamp circuit layout, electric light source, lighting device, etc., can solve the problems of BOOST voltage boosting cost, low efficiency, increased loss, etc., achieve fast current response, improve quality, The effect of increasing reliability
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0026] Please refer to figure 2 , the present embodiment provides a high-efficiency LED Light Bar driving circuit, which includes a half-bridge drive of an LLC power converter, and the output end of the half-bridge drive is connected to a loop composed of an integer number of primary transformers connected in series; each transformer Each of the secondary first ends of the secondary terminals is connected in series with a DC blocking capacitor and supplies power to an LED lamp group through an LED voltage difference balancing circuit. The LED lamp group is composed of a first LED string and a second LED string connected in parallel, and the LED The output end of the lamp group is connected with a dimming control circuit, and the output end of the dimming control circuit is connected with the LLC power converter through a power drive control circuit.
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