In recent years, LED light source requires LED driver to support the voltage range of increasingly wide output (such as 25%-100%) And export the current range (such as 1%~100%, even 0.1% – 100%) ,In order to realize the wide range of adjusting luminance. In order to improve the commonability that LED drives the power, demand to use the power of same drive to support different LED light sources. Require the circuit to be simple at the same time, low cost, high efficiency, high reliability, long life,etc..
Adopt 16 feet to capsulate, integrated PFC and ICL5101 of the semi-bridge syntony control device, and it is topological to use LCC to well realize the above goal, its high integration density can reduce the external number of elements, it is very suitable to combine LCC high-performance advantage. Have realized the extremely wide current range of output voltage (25%-100% of voltage, electric current 0-100%) ,And the full load efficiency exceeds 93%, the circuit is simple at the same time, low cost. Because of the characteristic of LCC, it can realize too that there is not constant current of secondary current feedback.
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