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Current control circuit

A current control circuit and current technology, applied in electric light sources, electrical components, electroluminescent light sources, etc., can solve problems such as LED flickering and average current fluctuation of LED components

Active Publication Date: 2017-10-20
普诚创智(成都)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A major problem it faces is: the fluctuation of the AC voltage in the power grid will cause the fluctuation of the average current of the LED components
The average LED current fluctuates with grid voltage fluctuations, which will cause LED flickering problems

Method used

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Embodiment Construction

[0024] Various exemplary embodiments, features, and aspects of the invention will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0025] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0026] In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without certain of the specific details. In some instances, methods, means, components and circuits well kn...

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PUM

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Abstract

Provided is a current control circuit which is used in a driving circuit system of an LED assembly. The driving circuit system comprises a current module and a rectifier, wherein the rectifier rectifies input AC voltage and provides the rectified AC voltage to the positive electrode of the LED assembly, and the input end of the current module is connected with the negative electrode of the LED assembly to set the current flowing by the LED assembly. The current control circuit comprises a voltage-stablizer, of which the input end is connected to the input end of the current module and the output end is connected to the in-phase input end of the first operational amplifier; and a first operational amplifier, of which the anti-phase input end is connected with the output end of the current module and the output end is connected with one end of a capacitor, wherein the voltage of the output end of the first operational amplifier provides referential voltage to the current module. The current control circuit further comprises a capacitor, of which one end is connected with the output end of the first operational amplifier and the other end is grounded, and a resistor of which one end is connected with the anti-phase input end of the first operational amplifier and the other end is grounded.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a current control circuit used in a driving circuit system of a light emitting diode (LED) assembly. Background technique [0002] The existing LED driving circuit system drives the LED components after rectifying the alternating current (AC) voltage from the power grid. A major problem it faces is that the fluctuation of the AC voltage in the power grid will cause the fluctuation of the average current of the LED components. [0003] According to the conduction principle of the LED, the LED will conduct only when the input voltage is higher than the in-phase conduction voltage Von of the LED, so the conduction angle of the LED (that is, in an AC voltage cycle, the LED conduction duration is equivalent to The electrical angle) will fluctuate with the fluctuation of the AC voltage in the grid, resulting in fluctuations in the average current of the LED. [0004] figure 1 A ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/395H05B45/48Y02B20/30H05B45/46
Inventor 张胜有孟欣
Owner 普诚创智(成都)科技有限公司