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LED driving power supply circuit

A technology of LED drive and power supply circuit, applied in the direction of lamp circuit layout, electric light source, light source, etc., can solve the problems of high design cost and long design time

Inactive Publication Date: 2013-01-16
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an LED drive power circuit, aiming to solve the problems of high design cost and long design time in order to meet the requirements of different output power in the existing LED drive power circuit

Method used

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] figure 2 The structure of the LED driving power supply circuit provided by the embodiment of the present invention is shown, and for the convenience of description, only the parts related to the present invention are shown.

[0024] The LED driving power supply circuit includes a power conversion circuit 300 , an output circuit 200 connected to the output end of the power conversion circuit 300 , an overcurrent protection circuit 400 and a pulse width modulation circuit 100 .

[0025] The input terminal of the power conversion circuit 300 is connected to the input voltage terminal, and the...

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Abstract

The invention provides an LED driving power supply circuit, belonging to the technical field of the LED driving circuit. The LED driving power supply circuit comprises a power converting circuit, an outputting circuit, an overcurrent protecting circuit, and a pulse width modulating circuit, wherein the power converting circuit can output different power through changing the parameters of elements, and the outputting circuit is connected with the output end of the power converting circuit. The LED driving power supply circuit with the structure can output different power through changing the parameters of part of the elements in the LED driving power supply circuit. The LED driving power supply circuit has the advantages of low design cost and short design time because the LED driving power supply circuit does not need to be changed too much.

Description

technical field [0001] The invention belongs to the technical field of LED driving circuits, in particular to an LED driving power supply circuit. Background technique [0002] At present, the LED driving power circuit such as figure 1 As shown, the power conversion circuit 30 outputs a stable DC voltage through the output circuit 20 after power conversion processing, rectification and filtering of the input 400V DC voltage. If the output voltage or current does not meet the requirements, the overcurrent protection circuit 40 is used to control For protection, specifically, the overcurrent protection circuit 40 detects the voltage variation output by the output circuit 20, and the pulse width modulation circuit 10 outputs a pulse signal to control the operation of the power conversion circuit 30 according to the detection result, thereby ensuring a constant output current , Stable voltage, so it ensures the normal working voltage and current of LED. [0003] However, in or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B37/00
CPCY02B20/42Y02B20/40
Inventor 周明杰彭进
Owner OCEANS KING LIGHTING SCI&TECH CO LTD