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A High Power Drive Circuit without an Exterior Switch

2015-03-22 15:24  
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High power LED, candescence light bulb and fluorescence lamp are widely used for illumination. Current source is the best way to offer LED power. As to the LEDs that have a current larger than 0.35A, induction switched voltage regulator is the best matcher. This design solution offers a series of circuits for single power integrated circuit regulators, so as to improve efficiency and reduce the size. Circuit in picture 1,2 and 3 adopt circuit that is composed of three or four alkalescence cells, NiMH cells or NiCd cells for power supply. Circuits in picture 4 and 5 can be used in automobiles, industry systems and emergency branch systems and telecoms, the circuits’ circuitry voltage of switch system is 12V, 24V or 42V. When the circuits begin to work, they will darkle. Resistances and potentiometers can get power by VD or CVL terminal of the interior voltage regulator.