Constant-current light emitting diode (LED) power supply with temperature compensation function

A LED power supply and temperature compensation technology, which is applied in the direction of electric light source, light source, lamp circuit layout, etc., can solve the problems of absence, damage, and low LED life, and achieve the effects of reducing heat generation, prolonging service life, and reducing costs
CN102932992AInactive Publication Date: 2013-02-13HONGLI LIGHTING GRP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HONGLI LIGHTING GRP
Publication Date
2013-02-13
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a constant-current light emitting diode (LED) power supply with a temperature compensation function. The constant-current LED power supply comprises an electromagnetic interference (EMI) / electromagnetic compatibility (EMC) module and a bridge type rectification module which are connected in series with each other, a switch power direct current to direct current (DC-DC) conversion module and a constant-current temperature compensation module, wherein the output of the bridge type rectification module is connected with the input end of the switch power DC-DC conversion module; the output end of the switch power DC-DC conversion module is connected with the input end of the constant-current temperature compensation module; and the output end of the constant-current temperature compensation module is connected to an LED light source. On the basis of constant-current output, an LED temperature compensation circuit is added, so that overtemperature protection of an LED lamp is realized, and the service life of an LED is greatly prolonged; moreover, the working temperature of the LED is controlled, so that when heat of the LED is reduced, the space temperature of the lamp is also reduced; and therefore, the working ambient temperature of the LED power supply is reduced, the device loss is reduced, and the service life of the power supply is prolonged.
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Description

technical field

[0001] The invention relates to a LED lamp power supply, in particular to a constant current LED power supply with lamp over-temperature protection. Background technique

[0002] LED (Light Emitting Diode), a light-emitting diode, is a solid-state semiconductor device that can directly convert electrical energy into light energy. As a new lighting method, LED has the advantages of long life, low energy consumption, no mercury pollution, flexible application, etc., and has broad development prospects. However, compared with other light sources, high-power LEDs generate extremely high heat, and 75% to 85% of the power consumption used to drive LEDs is finally converted into heat energy. Excessive heat will reduce the light output of LEDs and produce color casts, speeding up LEDs. Ageing.

[0003] The product specifications of high-power LEDs will indicate the maximum allowable output current curves at different ambient temperatures (or the temperature of the ...

Claims

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