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A working method of an active temperature-controlled LED high-power drive circuit

A technology of driving circuit and working method, which is applied in the direction of electric lamp circuit arrangement, electric light source, lighting device, etc., to achieve the effect of cooling control

Inactive Publication Date: 2017-01-04
CHANGZHOU TOPIC SEMICON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an active temperature-controlled LED high-power drive circuit, which solves the technical problem of actively cooling down the LED module while maintaining lighting when the temperature of the LED module rises.

Method used

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  • A working method of an active temperature-controlled LED high-power drive circuit
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  • A working method of an active temperature-controlled LED high-power drive circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, an active temperature-controlled LED high-power drive circuit includes: an LED constant current driver, an LED module connected to the output end of the LED constant current driver, and an LED operating temperature suitable for collecting from the LED module end to control The temperature control module of the current reference voltage of the LED constant current driver.

Embodiment approach

[0027] Such as figure 2 with image 3 As shown, two implementations of the temperature control module include:

Embodiment approach 1

[0029] The temperature control module includes: a temperature sensor, a thermistor located at the end of the LED module, the thermistor is connected to the current reference voltage terminal of the LED constant current driver through a switch tube; the analog signal output terminal of the temperature sensor It is connected to the non-inverting input terminal of a hysteresis voltage comparator, and the inverting input terminal of the hysteresis voltage comparator is connected to a reference voltage U R , the output terminal of the hysteresis voltage comparator is connected to the control terminal of the switching tube T.

[0030] The current reference voltage terminal may also be referred to as a feedback control terminal.

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Abstract

The invention relates to a working method of an active temperature-controlled LED high-power drive circuit, comprising: an LED constant current driver, an LED module connected to the output end of the LED constant current driver, and an LED working method suitable for collecting from the LED module end. Temperature to control the temperature control module of the current reference voltage of the LED constant current driver; the present invention realizes the temperature collection of the LED module through the temperature control module, and controls the temperature of the LED constant current driver by collecting the working temperature of the LED module The current reference voltage is used to reduce the output voltage or current of the LED constant current driver, and realize the cooling control of the LED module.

Description

technical field [0001] The invention relates to the field of LEDs, in particular to an active temperature-controlled LED high-power drive circuit and a working method thereof. Background technique [0002] Environmental issues have become the most important issue in the economic development of various countries, so energy-saving LED lighting has become the "new darling" of the lighting industry. Because LED has high luminous efficiency and low manufacturing cost, its application prospect and market are very broad. However, the heat dissipation problem of high-power LED lamps limits the development of the LED lighting industry. If the heat dissipation problem is not solved, the temperature of LED lamps will rise, resulting in reduced luminous efficiency and shortened service life. [0003] At present, the application of LEDs is becoming more and more extensive, and LED lamps for daily indoor and outdoor lighting are also becoming more and more popular. The current LED light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 张永良
Owner CHANGZHOU TOPIC SEMICON TECH
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