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High-efficiency light-emitting diode (LED) driving circuit and driving method thereof

An LED driving and driving circuit technology, applied in the field of electronics, can solve the problems of high operating frequency, large number of components and high cost of switching regulators, and achieve the effects of good size and cost, simple circuit structure and high work efficiency

Active Publication Date: 2013-07-24
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, switching regulators operate at high frequencies, so an EMI filter circuit is essential
Therefore, compared to linear regulators, switching regulators have more components, larger sizes, and relatively higher costs

Method used

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  • High-efficiency light-emitting diode (LED) driving circuit and driving method thereof
  • High-efficiency light-emitting diode (LED) driving circuit and driving method thereof
  • High-efficiency light-emitting diode (LED) driving circuit and driving method thereof

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Embodiment Construction

[0046] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0047] The implementation of the LED driving circuit according to the present invention will be described in detail below in conjunction with specific embodiments.

[0048] refer to Figure 2A , shows a functional block diagram of the high-efficiency LED driving circuit according to the first embodiment of the present invention. In this...

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Abstract

The present invention relates to a high efficiency LED driver and driving method thereof. In one embodiment, a high efficiency LED driving method configured for a LED device can include: (i) receiving a DC bus voltage and generating a driving voltage for the LED device through a power switch; (ii) comparing the DC bus voltage against a sum of the driving voltage and a first reference voltage; (iii) where when the DC bus voltage is greater than the sum of the driving voltage and the first reference voltage, generating a first output current; (iv) where when the DC bus voltage is greater than the driving voltage and less than the sum of the driving voltage and the first reference voltage, generating a second output current; and (v) matching an average current of the first output current and the second output current with a corresponding driving current.

Description

technical field [0001] The present invention relates to the field of electronic technology, and more specifically, relates to a driving circuit applied to an LED device and a driving method thereof. Background technique [0002] With the continuous innovation and rapid development of the lighting industry, coupled with the increasing importance of energy saving and environmental protection, LED lighting, as a revolutionary energy-saving lighting technology, is developing rapidly. 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 constant current power supply to ensure the safety of LED use and achieve ideal luminous intensity at the same time. It can be seen that it is very important to choose the correct LED driver. Without a good LED driver match, the advantages of LED lighting cannot be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B33/0812H05B37/02H05B45/395Y02B20/30
Inventor 陈伟
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD