A Feedback Controlled LED Driving Power Supply

A technology of LED drive and feedback control, applied in the field of LED lighting, can solve problems such as inability to adjust accurately and stably, and achieve the effect of maintaining stable voltage and current

Active Publication Date: 2020-04-07
深圳市中州远光照明科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the prior art, there are many LED drive power sources, such as isolated or non-isolated, or DC power drive, etc. However, in the prior art, the power source for driving LEDs generally filters the commercial power and then rectifies it. , LED drive after rectification, or pulsating current drive through transformer, the above LED power supply, for the adjustment of LED current or voltage, often only realizes the adjustment after a single judgment on the output side or input side, and its adjustment accuracy is also different. There are advantages, for LED lights that need to be adjusted with high precision and stability, it is impossible to perform precise and stable adjustments

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  • A Feedback Controlled LED Driving Power Supply

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Embodiment Construction

[0014] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with its embodiments; it should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention. invention. Other systems, methods and / or features of this embodiment will become apparent to those skilled in the art after reviewing the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the following claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the following detailed description.

[0015] Such as figure 1 As shown, the present invention proposes a feedback-controlled LED drive power supply, i...

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Abstract

The invention discloses a feedback-controlled LED drive power supply, comprising a variable capacitance circuit, a rectifier, a DC-DC converter, a feedback circuit, a detection and judgment circuit, and a control unit; the variable capacitance circuit is connected to the rectifier, and the variable current The controller is connected to the LED through the DC-DC converter, the input end of the feedback circuit is connected to the input end of the LED, the output end of the feedback circuit is connected to the variable capacitance circuit, and the detection and judgment circuit is connected to the The output end of the rectifier is connected to a control unit, and the control unit controls the DC-DC converter. The invention can keep the current and voltage of driving the LED constant through feedback control, thereby improving the dimming stability of the LED.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to a feedback-controlled LED drive power supply. Background technique [0002] In the prior art, there are many LED drive power sources, such as isolated or non-isolated, or DC power drive, etc. However, in the prior art, the power source for driving LEDs generally filters the commercial power and then rectifies it. , LED drive after rectification, or pulsating current drive through transformer, the above LED power supply, for the adjustment of LED current or voltage, often only realizes the adjustment after a single judgment on the output side or input side, and its adjustment accuracy is also different. However, for LED lights that require high-precision and stable adjustments, it is impossible to perform accurate and stable adjustments. For LEDs in various application scenarios in the future, it is necessary to provide a multiple feedback to provide a driving power supply f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/14H05B45/30H05B44/00
CPCH05B45/50H05B45/00H05B45/37
Inventor 李满罗朝茂刘春
Owner 深圳市中州远光照明科技有限公司
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