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Linear high-efficiency constant current flicker-free led drive circuit and its drive method

An LED driving, flicker-free technology, applied in the field of circuit design, can solve the problems of narrow input voltage range and output stroboscopic, and achieve the effect of reducing conduction loss, optimizing system performance and high efficiency

Active Publication Date: 2019-11-15
CRM ICBG (WUXI) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a linear high-efficiency constant current flicker-free LED drive circuit and its drive method, which are used to solve the overall efficiency, The input voltage range is narrow and the output is flickering

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  • Linear high-efficiency constant current flicker-free led drive circuit and its drive method
  • Linear high-efficiency constant current flicker-free led drive circuit and its drive method
  • Linear high-efficiency constant current flicker-free led drive circuit and its drive method

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Embodiment Construction

[0068] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0069] see Figure 2 ~ Figure 3 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbi...

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Abstract

The present invention provides a linear high-efficiency constant current non-stroboscopic LED driving circuit and its driving method, comprising: a voltage input module, an LED load, a first energy storage capacitor, a charging module and a constant current control module; one end of the charging module is connected to the The output end of the voltage input module is connected, and the other end is connected to the first energy storage capacitor, which is suitable for charging the first energy storage capacitor when the input voltage is greater than the voltage of the first energy storage capacitor, and The average value of the charging current of the charging module in different input voltage cycles is constant; the first energy storage capacitor is connected to the LED load through the constant current control module, and is suitable for use in the constant current control module A constant current discharge is performed on the LED load under control to ensure that the LED load current has no ripple. The drive circuit of the present invention can realize the constant current of the output LED current in a wide input voltage range, and can also obtain high efficiency when the input voltage is high, and the output has no flicker.

Description

technical field [0001] The invention relates to the field of circuit design, in particular to a linear, high-efficiency, constant-current, flicker-free LED drive circuit and a drive method thereof. Background technique [0002] LED is a semiconductor electronic component that can emit light. This electronic component can only emit red light with low luminosity in the early days. With the continuous advancement of technology, it has now developed to the extent that it can emit visible light, infrared rays and ultraviolet rays. Big improvement. LED has the advantages of high efficiency, long life, unbreakable, high switching speed, high reliability, etc. that traditional light sources cannot match, and has been widely used in the fields of indicator lights, displays and lighting. [0003] Such as figure 1 Shown is a common structure of single-segment linear LED drive, the AC voltage AC is converted into the input voltage V after passing through the rectifier bridge IN , and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/44H05B45/00Y02B20/30
Inventor 刘军卢圣晟李国成吴泉清
Owner CRM ICBG (WUXI) CO LTD
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