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Light-emitting diode control circuit

A light-emitting diode and control circuit technology, which is applied in energy-saving control technology, electric lamp circuit arrangement, light source, etc., can solve the problems of light-emitting diode control circuit 100 that cannot be applied to lightweight electronic products, volume restrictions, etc., to reduce the implementation area and volume. , the effect of avoiding burning

Inactive Publication Date: 2014-10-15
ZHONGSHAN WEIQIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of too large volume will also cause great restrictions on the implementation of the light emitting diode control circuit 100, for example, the light emitting diode control circuit 100 cannot be applied to lightweight electronic products, etc.

Method used

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  • Light-emitting diode control circuit
  • Light-emitting diode control circuit
  • Light-emitting diode control circuit

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Embodiment Construction

[0023] In order to solve such as figure 1 The light emitting diode control circuit 100 of the known technology occupies too much area. The present invention discloses a light emitting diode control circuit that does not require various large-area passive components used in the known technology and uses fixed power.

[0024] see figure 2 , which is a schematic diagram of the LED control circuit 200 according to the present invention. Such as figure 2 As shown, the LED control circuit 200 includes an AC power source 210, a bridge rectifier 220, a control circuit 230, and a group of LEDs DS1, DS2, DS3, . . . , DS(N-1), and DSN connected in series.

[0025] The first terminal of the AC power supply 210 is coupled to the first terminal of the bridge rectifier 220, the second terminal of the AC power supply 210 is coupled to the second terminal of the bridge rectifier 220, and the AC power supply 210 and the bridge rectifier 220 are used for The node DSC1 at the output of the b...

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PUM

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Abstract

The invention discloses a light-emitting diode control circuit. The on and off time of a switch is controlled according to output voltage of a bridge rectifier, a plurality of light-emitting diode groups in serial and parallel connection are in a constant power state, and a large amount of passive assemblies do not need to be used to prevent the plurality of light-emitting diodes from being unable to operate or being burnt down. As the light-emitting diode control circuit does not need to use a large amount of passive assemblies, the implementation area is greatly narrowed, and the light-emitting diode control circuit is applied to a lightweight electronic product.

Description

technical field [0001] The invention relates to a diode control circuit, in particular to a light-emitting diode control circuit which determines the working cycle of an open transistor according to the potential of an input voltage to maintain a fixed power. Background technique [0002] see figure 1 , which is a schematic diagram of a common LED control circuit 100 . Such as figure 1 As shown, the commonly used LED control circuit 100 includes an AC power supply 110, a bridge rectifier 120, a control circuit 130, a transistor 140, a transformer 150, a first capacitor 160, an optocoupler 170, a second capacitor 180, a current sensing resistor 190, And a plurality of light-emitting diodes D1, D2, D3, . . . , D(N-1), DN connected in series. [0003] The AC power source 110 and the bridge rectifier 120 are used to generate a first DC voltage at the output terminal DC1 of the bridge rectifier 120 . The control circuit 130 is used to control the turn-on time of the transisto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 李克勤陈宏杰张世光
Owner ZHONGSHAN WEIQIANG TECH
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