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Light emitting diode driver and driving method thereof

A technology of light-emitting diodes and light-emitting diode lamps, which is applied to the driving of light-emitting diode drivers and the field of constant-power light-emitting diode drivers, can solve the problems of high cost, low efficiency, poor stability, etc., and achieve the effect of good reliability and cost reduction.

Inactive Publication Date: 2018-02-16
HEP TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the above-mentioned problems in the prior art, one object of the present invention is to provide a LED driver to solve the problems of high cost, poor stability and low efficiency of the existing LED driver

Method used

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  • Light emitting diode driver and driving method thereof
  • Light emitting diode driver and driving method thereof
  • Light emitting diode driver and driving method thereof

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Embodiment Construction

[0042] Embodiments of the LED driver and its driving method provided by the present invention will be described below with reference to related figures. For ease of understanding, the same components in the following embodiments are described with the same symbols.

[0043] Such as figure 2 Shown is the circuit diagram of the first embodiment of the LED driver provided by the present invention. This embodiment illustrates a preferred example of applying the design of the present invention to a flyback converter. As shown in the figure, the LED driver 2 may include a switch module, an energy storage module and a processing module; in this embodiment, the switch module may be a switch S, which may be a metal oxide semiconductor field effect transistor (n-channel MOSFET), The energy storage module can be a transformer TM, and the processing module can be a microcontroller M; in other preferred embodiments, the switch S can also be a bipolar junction transistor (BJT).

[0044] T...

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Abstract

The invention discloses a light emitting diode driver and a driving method thereof. The light emitting diode driver can comprise a switch module, an energy storage module and a processing module; theenergy storage module can be connected with the switch module, a direct current input power supply and a light emitting diode lamp and can store the energy input by the direct current input power supply; and the processing module can be connected with the switch module and the direct current input power supply and can switch the switch module to enable the energy storage module to output energy tothe light emitting diode lamp, wherein the processing module can receive a preset work cycle to output a modulating signal to switch the switch module so as to enable the light emitting diode driverto work in a constant power output mode.

Description

technical field [0001] The invention relates to a light emitting diode driver, in particular to a constant power light emitting diode driver. The invention also relates to a driving method of the LED driver. Background technique [0002] Due to the advancement of science and technology, the technology of light-emitting diode (LED) lighting devices is also getting more and more advanced. Light-emitting diode (LED) lighting devices have many advantages, such as long life, energy saving, environmental protection, small size and fast response, etc., so they are very suitable Become the mainstream lighting device in the future. [0003] However, although the rated power of most LED lighting devices is similar at present, the rated current or rated voltage they use are not the same, and the traditional LED drivers used in most LED lighting devices are constant current drivers; for example, If there are three different LED lighting devices with rated current / voltage of 80V / 350mA,...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00
Inventor 林铭锋
Owner HEP TECH
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