Highly-efficient drive circuit of light emitting diode (LED) Light Bars
The invention relates to a highly-efficient drive circuit of light emitting diode (LED) Light Bars. The drive circuit is characterized by comprising a half-bridge driver of a logical link control (LLC) power converter, wherein the output end of the half-bridge driver is connected with a loop which c...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to a highly-efficient drive circuit of light emitting diode (LED) Light Bars. The drive circuit is characterized by comprising a half-bridge driver of a logical link control (LLC) power converter, wherein the output end of the half-bridge driver is connected with a loop which consists of an integral number of primary serial transformers; and a first end of a secondary winding of each transformer is connected in series with a blocking capacitor and provides power for an LED light set through an LED voltage difference balance circuit, the LED light set is formed by parallelly connecting a first LED string and a second LED string, the output end of the LED light set 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. According to the highly-efficient drive circuit of the LED Light Bars, the output of a main power circuit is used for directly driving each LED Light Bar, |
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