CN104486881A - Temperature-controlled constant-current LED (Light Emitting Diode) power supply - Google Patents
Temperature-controlled constant-current LED (Light Emitting Diode) power supply Download PDFInfo
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- CN104486881A CN104486881A CN201410759979.0A CN201410759979A CN104486881A CN 104486881 A CN104486881 A CN 104486881A CN 201410759979 A CN201410759979 A CN 201410759979A CN 104486881 A CN104486881 A CN 104486881A
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- circuit
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- power supply
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Abstract
The invention discloses a temperature-controlled constant-current LED (Light Emitting Diode) power supply. The temperature-controlled constant-current LED power supply comprises an input protection circuit, a filter circuit, a bridge rectifier circuit, an IC (Integrated Circuit) driving control circuit, a PFC (Power Factor Correction) circuit, a DC (Direct Current)/DC insulated conversion circuit, a temperature-controlled constant-current control circuit and an optically-coupled circuit, wherein the input end of the input protection circuit is connected with a mains supply, and the output end of the input protection circuit is connected to the bridge rectifier circuit through the filter circuit. The temperature-controlled constant-current LED power supply disclosed by the invention has the advantages that the output current of the power supply can be regulated through the temperature of an automatic temperature-sensing electrolytic capacitor; meanwhile, by utilizing a PFC technology, the power factor of the power supply is up to 0.99, the efficiency is up to 90%, the effects of controlling over-high temperature of the power supply and limiting the output current of the power supply can be achieved by the high-accuracy temperature-controlled constant-current control circuit, thus the reliability of the power supply can be increased, and the service life can be prolonged.
Description
Technical field
The present invention relates to a kind of temperature-control constant-current LED power.
Background technology
In current LED industry, when conventional LED drive power uses, temperature is high, continuous firing can have a strong impact on its useful life in high temperature environments, the reliability of power supply depends on the quality of the electrochemical capacitor in the middle of circuit, because its electrochemical capacitor is not well monitored, make the useful life of power supply not well control, the invention provides a kind of temperature-control constant-current LED power, temperature-sensitive is utilized to monitor the real time temperature situation of electrochemical capacitor, regulate electric power outputting current, to reduce power, reach energy-conservation while increase the service life.
Summary of the invention
The object of the present invention is to provide a kind of temperature-control constant-current LED power, this power supply is by temperature-control constant-current circuit inductance power source internal electrochemical capacitor temperature, and when power source internal electrochemical capacitor temperature reaches certain design load, electric power outputting current can decrease, reduce overall power, do not need manual control.Reach energy-conservation while increase the service life.
Technical scheme of the present invention: a kind of temperature-control constant-current LED power, this power supply comprises input protection circuit, filter circuit, bridge rectifier, IC Drive and Control Circuit, pfc circuit, DC/DC isolated variable circuit, temperature-control constant-current circuit, optically coupled circuit; Input protection circuit input connects civil power, and its output is connected to bridge rectifier by filter circuit; The output of bridge rectifier is connected to pfc circuit, the output of pfc circuit is connected to DC/DC isolated variable circuit, the output of bridge rectifier is powered to IC Drive and Control Circuit through electric resistance partial pressure, IC Drive and Control Circuit exports two path control signal, control pfc circuit and DC/DC isolated variable circuit respectively, while the output of DC/DC isolated variable circuit meets LED, feed back to IC Drive and Control Circuit by temperature-control constant-current circuit through optically coupled circuit.
The invention has the advantages that: regulate electric power outputting current by automatic temperature-sensed electrochemical capacitor temperature, utilize power factor correction technology simultaneously, make the power factor of power supply up to 0.99, efficiency is up to 90%, the too high effect limiting its output current of high-precision temperature-control constant-current control circuit controllable power temperature, thus raising power supply reliability, increase the service life.
Accompanying drawing explanation
Fig. 1 is a kind of temperature-control constant-current LED power schematic block circuit diagram of the present invention.
Embodiment
A kind of temperature-control constant-current LED power, this power supply comprises input protection circuit 01, filter circuit 02, bridge rectifier 03, IC Drive and Control Circuit 04, pfc circuit 05, DC/DC isolated variable circuit 06, temperature-control constant-current circuit 07, optically coupled circuit 08; Input protection circuit 01 input connects civil power, and its output is connected to bridge rectifier 03 by filter circuit 02; The output of bridge rectifier 03 is connected to pfc circuit 05, the output of pfc circuit is connected to DC/DC isolated variable circuit 06, the output of bridge rectifier 03 is powered to IC Drive and Control Circuit 04 through electric resistance partial pressure, IC Drive and Control Circuit 04 exports two path control signal, IC Drive and Control Circuit 04 is fed back to by temperature-control constant-current circuit 07 through optically coupled circuit 08 while the output of control pfc circuit 05 and DC/DC isolated variable circuit 06, DC/DC isolated variable circuit 06 meets LED respectively.
Temperature-control constant-current LED power is by temperature-control constant-current circuit inductance power source internal electrochemical capacitor temperature, and when power source internal electrochemical capacitor temperature reaches certain design load, electric power outputting current can decrease, and reduces overall power, does not need manual control.Reach energy-conservation while increase the service life.
Claims (2)
1. a temperature-control constant-current LED power, is characterized in that: this power supply comprises input protection circuit (01), filter circuit (02), bridge rectifier (03), IC Drive and Control Circuit (04), pfc circuit (05), DC/DC isolated variable circuit (06), temperature-control constant-current circuit (07), optically coupled circuit (08); Input protection circuit (01) input connects civil power, and its output is connected to bridge rectifier (03) by filter circuit (02); The output of bridge rectifier (03) is connected to pfc circuit (05), the output of pfc circuit is connected to DC/DC isolated variable circuit (06), the output of bridge rectifier (03) is powered to IC Drive and Control Circuit (04) through electric resistance partial pressure, IC Drive and Control Circuit (04) exports two path control signal, control pfc circuit (05) and DC/DC isolated variable circuit (06) respectively, while the output of DC/DC isolated variable circuit (06) meets LED, feed back to IC Drive and Control Circuit (04) by temperature-control constant-current circuit (07) through optically coupled circuit (08).
2. temperature-control constant-current LED power according to claim 1, it is characterized in that: described temperature-control constant-current LED power is by temperature-control constant-current circuit inductance power source internal electrochemical capacitor temperature, after temperature reaches certain design load, power supply reduces output current automatically, make its power drop, after the temperature sensed is reduced to certain value, electric power outputting current is switched to normal operating conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759979.0A CN104486881A (en) | 2014-12-12 | 2014-12-12 | Temperature-controlled constant-current LED (Light Emitting Diode) power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759979.0A CN104486881A (en) | 2014-12-12 | 2014-12-12 | Temperature-controlled constant-current LED (Light Emitting Diode) power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104486881A true CN104486881A (en) | 2015-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410759979.0A Pending CN104486881A (en) | 2014-12-12 | 2014-12-12 | Temperature-controlled constant-current LED (Light Emitting Diode) power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN104486881A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1856207A (en) * | 2005-04-18 | 2006-11-01 | 马维尔国际贸易有限公司 | Improved control system for fluorescent light fixture |
| CN201422183Y (en) * | 2009-05-26 | 2010-03-10 | 郑州光华灯具有限公司 | High-power LED lamp drive device |
| CN101825689A (en) * | 2010-04-27 | 2010-09-08 | 浪潮电子信息产业股份有限公司 | Method for monitoring service life of power source in real time |
| CN204616136U (en) * | 2014-12-12 | 2015-09-02 | 武汉全华光电科技股份有限公司 | A kind of LED power of temperature-control constant-current |
-
2014
- 2014-12-12 CN CN201410759979.0A patent/CN104486881A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1856207A (en) * | 2005-04-18 | 2006-11-01 | 马维尔国际贸易有限公司 | Improved control system for fluorescent light fixture |
| CN201422183Y (en) * | 2009-05-26 | 2010-03-10 | 郑州光华灯具有限公司 | High-power LED lamp drive device |
| CN101825689A (en) * | 2010-04-27 | 2010-09-08 | 浪潮电子信息产业股份有限公司 | Method for monitoring service life of power source in real time |
| CN204616136U (en) * | 2014-12-12 | 2015-09-02 | 武汉全华光电科技股份有限公司 | A kind of LED power of temperature-control constant-current |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150401 |
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| WD01 | Invention patent application deemed withdrawn after publication |