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LED (light emitting diode) dimming drive circuit

A technology of dimming drive and LED lamp group, which is applied in the direction of electric lamp circuit layout, light source, electric light source, etc. It can solve the problems of inability to adjust the output power, the inability to adjust the light intensity, and inconvenience for users, so as to avoid energy consumption and high Market value, the effect of enhancing the effect of use

Inactive Publication Date: 2015-07-08
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But they are all constant power output, the output power cannot be adjusted, and the light intensity cannot be adjusted, which brings serious inconvenience to users.

Method used

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  • LED (light emitting diode) dimming drive circuit

Examples

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Embodiment Construction

[0016] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] like figure 1 As shown, one embodiment of the present invention is an LED dimming driving circuit, which includes a working power supply, a voltage stabilizing circuit, a constant current circuit, a control circuit and an LED lamp group.

[0018] Among them, the constant current circuit includes a three-terminal adjustable voltage regulator U2, current sampling resistors R11, R12, R13, and relays K1, K2, K3, which are used to provide a constant working current for the LED lamp group.

[0019] Pin 1 of the three-terminal adjustable voltage regulator U2 is the output pin, which is respectively connected to one end of the current sampling resistors R11, R12, and R13, and the other end of the current sampling resistors R11, R12, and R13 are respectively connected to the The anode of the LED light group; the 2 pin of the thre...

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PUM

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Abstract

The invention relates to an LED (light emitting diode) dimming drive circuit, comprising a working power supply, a voltage stabilizing circuit, a constant current circuit, a control circuit and an LED lamp bank. A constant current integration chip is respectively connected with a current sampling resistor R11, a resistor R12 and a resistor R13 and then is connected to the anode of the LED lamp bank through a relay K1, a relay K2 and a relay K3 respectively. The cathode of the LED lamp bank is connected with a GND (Ground). In the invention, the constant current integration chip is adopted to drive to perform dimming and ensure the LED to work stable and reliably.

Description

【Technical field】 [0001] The invention relates to an LED driving circuit, in particular to an LED dimming driving circuit. 【Background technique】 [0002] With the continuous development of science and technology, new products and new technologies are constantly innovating. As a new type of light source, LED has the characteristics of energy saving, environmental protection and high efficiency. There are various LED drive circuits. With the development of microelectronics technology, many integrated integrated high-frequency modules are used to design LED drives in DC 24V places. It has the advantages of low power consumption, high efficiency, small volume per unit power, light weight, and constant drive current. The advantages of the switching power supply are taken into consideration, the interference problem of the switching power supply is overcome, and the circuit is simple and reliable. But they are all constant power output, the output power cannot be adjusted, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 周明杰孙占民
Owner OCEANS KING LIGHTING SCI&TECH CO LTD