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LED lighting device, LED driving circuit and its switching power supply driving chip

A LED driver and driver chip technology, which is applied in the direction of lighting devices, electric light sources, lamp circuit layout, etc., can solve the problems of complex circuit structure, low constant current precision, and high cost, and achieve simple circuit structure, high constant current precision, and manufacturing low cost effect

Active Publication Date: 2017-01-25
SHENZHEN SUNMOON MICROELECTRONICS
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an LED lighting device, an LED driving circuit and a switching power supply driving chip thereof, aiming at solving the problems of low constant current precision, complex circuit structure and high cost existing in the prior art

Method used

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  • LED lighting device, LED driving circuit and its switching power supply driving chip
  • LED lighting device, LED driving circuit and its switching power supply driving chip
  • LED lighting device, LED driving circuit and its switching power supply driving chip

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Embodiment Construction

[0030] 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.

[0031] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0032] An embodiment of the present invention is a switching power supply drive chip 20, please refer to figure 1 , connected to the input stage rectification and filtering circuit 10 and the output stage circuit 30 in the LED drive circuit, the input rectification and filtering circuit 10 rectifies and filters the alternating current, and the output stage circuit 30 drives the LED load to work;

[0033] The switching power supply drive chip includes: a switching device...

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Abstract

The invention belongs to the technical field of constant current driving, and provides an LED lighting device, an LED driving circuit and a switch power source driving chip of the LED driving circuit. The switch power source driving chip comprises a switch device, a logic control module, a first voltage comparison module and a degaussing detection module. The input end of the first voltage comparison module is connected with the input end of an output stage circuit, the output end of the first voltage comparison module is connected with the first input end of the logic control module, the first input end of the degaussing detection module is connected with the voltage output end of an output circuit, the second input end of the degaussing detection module is connected with the output end of the logic control module, the output end of the degaussing detection module is connected with the second input end of the logic control module, and the switching frequency of the switch device is adjusted by the logic control module according to control signals output by the first voltage comparison module and the degaussing detection module. Compared with the prior art, the LED lighting device, the LED driving circuit and the switch power source driving chip are high in constant current accuracy, simple in circuit structure and low in manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of constant current driving, and in particular relates to an LED lighting device, an LED driving circuit and a switching power supply driving chip thereof. Background technique [0002] High-brightness light-emitting diode (Light Emitting Diode) has become a new generation of green lighting source due to its energy saving, environmental protection, high efficiency, long life and many other advantages. With the maturity of high-brightness LED lighting technology, it will be widely used in various fields and become the first choice of lighting source. Manufacture of high-efficiency, low-cost driving power is the key to ensure the LED luminous quality and overall performance. However, since the brightness of an LED lamp is related to the light output intensity parameter, it is directly proportional to its current and forward voltage drop, and changes with temperature. Therefore, the driving of LED requires a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 李照华付凌云戴文芳谢玲陈艳霞王文荣
Owner SHENZHEN SUNMOON MICROELECTRONICS
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