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Constant current driver of LED (light emitting diode) light source and LED lamp

A technology of constant current driver and LED light source, which is applied in the direction of light source, electric light source, electric lamp circuit layout, etc., can solve the problems of poor stability and reliability of the driver, and achieve the effect of improving stability and reliability

Active Publication Date: 2012-11-28
INVENTRONICS HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a constant current driver for LED light sources and LED lamps, which are used to solve the problems of poor stability and reliability of existing drivers

Method used

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  • Constant current driver of LED (light emitting diode) light source and LED lamp
  • Constant current driver of LED (light emitting diode) light source and LED lamp
  • Constant current driver of LED (light emitting diode) light source and LED lamp

Examples

Experimental program
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Effect test

Embodiment 1

[0043] see figure 1 , figure 1 It is a schematic structural diagram of a constant current driver for an LED light source disclosed in Embodiment 1 of the present invention. The constant current driver is arranged between the power supply 200 and the LED light source 300, and includes a plurality of parallel power supply circuits 1-N, and each power supply circuit includes a current processing unit and a separation circuit.

[0044] Wherein, the current processing unit is used to supply constant current to the LED light source, and at least one constant current module is included in the current processing unit; An on-off device, and / or an on-off device connected between the LED light source 300 and the output terminal of the constant current module in the power supply circuit to which it belongs. The separation circuit can separate the power supply circuit to which it belongs from other power supply circuits when the power supply circuit to which it belongs fails. Specifical...

Embodiment 2

[0050] see figure 2 , figure 2 It is a schematic structural diagram of a constant current driver for an LED light source disclosed in Embodiment 2 of the present invention. The constant current driver is arranged between the power supply 200 and the LED light source 300, and includes a plurality of parallel power supply circuits 1-N, and each power supply circuit includes a current processing unit and a separation circuit.

[0051] Wherein, the current processing unit is specifically a constant current module. The constant current module processes the current input by the power supply 200 and outputs a constant current to the LED light source 300. At this time, the input end of the constant current module is the input end of the current processing unit. The output terminal of the flow module is the current output terminal of the current processing unit.

[0052] The on-off device in the separation circuit adopts a fuse. The separation circuit includes: a fuse connected be...

Embodiment 3

[0065] see image 3 , image 3 It is a schematic structural diagram of a constant current driver for an LED light source disclosed in Embodiment 3 of the present invention. The constant current driver is arranged between the power supply 200 and the LED light source 300, and includes a plurality of parallel power supply circuits 1-N, and each power supply circuit includes a current processing unit and a separation circuit.

[0066] Wherein, the current processing unit includes a constant current module and a dynamic current adjustment unit. The dynamic current adjustment unit is used to balance the instantaneous output current of the constant current module. The input end of the dynamic current adjustment unit is connected to the output end of the constant current module, and the output end is connected to the LED light source 300 . At this time, the input end of the constant current module is the input end of the current processing unit, and the output end of the dynamic cu...

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Abstract

The invention discloses a constant current driver of an LED (light emitting diode) light source, which comprises a plurality of power supply loops connected in parallel, wherein each power supply loop comprises a current processing unit and a separation circuit; the current processing unit comprises a constant current module which is used for supplying constant current power to the LED light source; and the separation circuit comprises on-off devices connected between a power supply and the input end of the current processing unit in the power supply loop of the power supply and / or on-off devices connected between the output end of the constant current module in the power supply loop of the power supply and the LED light source. According to the constant current driver disclosed by the invention, when one or more power supply loops have faults, the power supply loops are separated from the rest power supply loops under the action of the separation circuits inside the power supply loops having faults, and the rest power supply loops continuously supply power to the LED light source, so that the LED light source can not be switched off due to the faults of some power supply loops, thereby improving the stability and reliability of the constant current driver. The invention also discloses an LED lamp.

Description

technical field [0001] The invention relates to the technical field of power supply for LED light sources, in particular to a constant current driver for LED light sources and an LED lamp. Background technique [0002] LED light sources are used in more and more occasions due to their advantages of long life, high luminous efficiency, and environmental protection. The life of the LED light source itself is as long as 50,000 hours, and the LED lamp is mainly caused by the failure of the driver of the LED light source. Among the reasons for the failure of the driver of the LED light source, the failure of each semiconductor device is the most prominent. The main reason for the failure is that the LED light source itself heats up seriously. The LED driver is usually placed inside the lamp, close to the LED light source, and the high temperature working environment is harmful to The operating characteristics of semiconductor devices are greatly affected. [0003] When the driv...

Claims

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Application Information

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IPC IPC(8): H05B37/04H05B37/02
Inventor 葛良安华桂潮
Owner INVENTRONICS HANGZHOU