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Inserted type multifunctional light emitting diode (LED) drive circuit

A LED driving and multi-functional technology, applied in the direction of lamp circuit layout, electric light source, lighting device, etc., can solve the problem of narrow input DC power supply voltage range, and achieve the effect of low cost, wide application range and high reliability

Active Publication Date: 2011-10-19
金湖县农副产品营销协会
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that the input DC power supply voltage range applicable to the existing plug-in interface circuit is relatively narrow, and provides a plug-in multifunctional LED drive circuit that broadens the applicable range of the input DC power supply voltage

Method used

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  • Inserted type multifunctional light emitting diode (LED) drive circuit
  • Inserted type multifunctional light emitting diode (LED) drive circuit
  • Inserted type multifunctional light emitting diode (LED) drive circuit

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Embodiment Construction

[0027] refer to Figure 2-4 , a plug-in multifunctional LED drive circuit, including a main circuit 1 and a multifunctional control circuit 2, the main circuit includes an input capacitor Ci, an N-MOS transistor S1, a current limiting resistor R1, a Zener diode Z1, an inductor L1, The output capacitor Co and the load light-emitting diode group, the input capacitor Ci is connected in parallel with the input DC voltage Vi, and the drain of the N-MOS transistor S1 is connected with the positive terminal of the input DC voltage Vi and one end of the current limiting resistor R1 at the same time, so The other end of the current limiting resistor R1 is connected to the cathode of the Zener diode Z1, the source of the N-MOS transistor S1 is connected to the anode of the Zener diode Z1 and one end of the inductor L1, and the other end of the inductor L1 is connected to the output One end of the capacitor Co is connected to the positive end of the output voltage Vo, and the other end o...

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Abstract

The invention provides an inserted type multifunctional light emitting diode (LED) drive circuit, which comprises a main loop and a multifunctional control circuit, wherein the main loop comprises an input capacitor, an N-metal-oxide semiconductor (MOS) tube, a current-limiting resistor, a voltage regulator diode, an inductor, an output capacitor and a load light emitting diode set, wherein the input capacitor is connected with input direct current (DC) voltage in parallel; the drain electrode of the N-MOS tube is simultaneously connected with the positive terminal of the input DC voltage and one end of the current-limiting resistor; the other end of the current-limiting resistor is connected with the cathode of the voltage regulator diode; the source electrode of the N-MOS tube is simultaneously connected with the anode of the voltage regulator diode and one end of the inductor; the other end of the inductor is simultaneously connected with one end of the output capacitor and the positive terminal of an output voltage; the other end of the output capacitor is simultaneously connected with the negative terminal of the input DC voltage and the negative terminal of the output voltage; the anode of the load light emitting diode set is connected with the positive terminal of the output voltage; the cathode of the load light emitting diode set is connected with the negative terminal of the output voltage; and the main loop is connected with the multifunctional control circuit which is used for controlling the working state of the main loop.

Description

technical field [0001] The invention relates to a plug-in multifunctional interface circuit, in particular to a plug-in multifunctional LED drive circuit. Background technique [0002] LED is a solid-state cold light source, which has the advantages of high brightness, low power consumption, long life, small size, no need to warm up the lamp, fast response, shock resistance, good weather resistance, suitable for mass production, environmental protection, recyclable and reused, etc. , especially suitable for lighting occasions with high reliability requirements. In lighting applications, it is common for multiple LEDs to work together, which can be connected in series, parallel, and series-parallel. Many power supplies currently available cannot be used to directly "light" these LEDs, and some specialized drive circuits are required. Using the plug-in interface circuit as the LED drive circuit can solve the matching problem between different power sources and different LEDs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 陈怡
Owner 金湖县农副产品营销协会
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