CN103037585B - Distributed light-emitting diode (LED) lamp and drive power supply plug-in plug-out protective circuit thereof - Google Patents
Distributed light-emitting diode (LED) lamp and drive power supply plug-in plug-out protective circuit thereof Download PDFInfo
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- CN103037585B CN103037585B CN201210560121.2A CN201210560121A CN103037585B CN 103037585 B CN103037585 B CN 103037585B CN 201210560121 A CN201210560121 A CN 201210560121A CN 103037585 B CN103037585 B CN 103037585B
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- 230000001681 protective effect Effects 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/25—Circuit arrangements for protecting against overcurrent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention is suitable for the field of light-emitting diode (LED) drive, and provides a distributed LED lamp and a drive power supply plug-in plug-out protective circuit. When a drive power supply and a LED lamp panel are not connected but connected with alternative current, output voltage of the whole rectifier filter circuit is lowered by a voltage-diving module. After the drive power supply and the LED lamp panel are connected, a voltage detection module detects voltage of a first end of a resistor R and then correspondingly outputs and controls voltage of voltage-diving direct current output by the voltage-diving module regulated by a level drive voltage-diving control module to enable output level of a voltage comparison circuit to be corresponding regulated, and feedback current of the drive power supply is controlled to achieve constant current drive of a pulse width modulation (PMW) control circuit of the drive power supply according to the feedback current so that when the drive power supply and the LED lamp panel are connected, service life of the LED is ensured not to shortened due to overcurrent.
Description
Technical field
The invention belongs to field of LED drive, particularly relate to a kind of Split type LED light fitting and driving power plug protective circuit thereof.
Background technology
At present, LED lamp is as a kind of novel illuminating product, its technology not yet full maturity, and country does not yet specify unified standard for LED lamp, a driving power supply of existing LED lamp and the structure of LED lamp panel are mainly divided into integral type and split type two kinds.The radiating effect integrated due to driving power and the LED lamp panel of the LED lamp of integral type can be poorer than split type LED lamp, so standardized Split type LED light fitting is the development trend of following LED lamp.
Because LED is made up of semi-conducting material, so it needs to obtain constant current-supplying to ensure normal work.Existing Split type LED light fitting all requires that LED lamp panel and driving power complete after connection just can incoming transport electricity, reason be if when LED lamp panel do not complete with driving power be connected first incoming transport electricity power, driving power then can be made to be in constant voltage output mode, and be export direct current with the form of maximum voltage under constant voltage output mode, the On current of LED can be made like this to be greater than its peak inrush current, and then LED generation to be damaged and affects the useful life of LED.And in user's regular job, first to power latter linked mode of operation if adopt, then can make LED overcurrent and shorten useful life of LED, time serious, also directly can damage LED lamp panel.Therefore, existing Split type LED light fitting in use exists and is connected because not completing driving power and LED lamp panel and shifts to an earlier date the LED overcurrent that incoming transport power supply station causes and the problem shortening the useful life of LED.
Summary of the invention
The object of the present invention is to provide a kind of driving power plug protective circuit of Split type LED light fitting, be intended to solve existing Split type LED light fitting and in use exist and is connected because not completing driving power and LED lamp panel and shifts to an earlier date the LED overcurrent and the problem in the useful life of shortening LED that incoming transport power supply station causes.
The present invention realizes like this, a kind of driving power plug protective circuit of Split type LED light fitting, with the current rectifying and wave filtering circuit of driving power, divider resistance R1, divider resistance R2, divider resistance R3, resistance R4 and voltage comparator circuit connect, described divider resistance R1 is connected between the output of described current rectifying and wave filtering circuit and the first end of described divider resistance R2, the first end being connected to described resistance R4 altogether of described divider resistance R2 and described divider resistance R3, second end of described resistance R4 connects the in-phase input end of current comparison circuit, the output level of described voltage comparator circuit and the output level of described current comparison circuit control the feedback current that the feedback circuit of described driving power exports jointly, the pwm control circuit of described driving power is made to adjust the output voltage of the transformer T1 of described driving power according to described feedback current, described driving power plug protective circuit comprises:
Division module, input and output are connected the output of described current rectifying and wave filtering circuit and the inverting input of described voltage comparator circuit respectively, direct current for exporting described current rectifying and wave filtering circuit carries out voltage division processing to reduce described galvanic voltage, and exports a dividing potential drop direct current;
Voltage detection module, input connects the first end of described resistance R4, and the voltage for the first end to described resistance R4 detects, and correspondingly exports control level signal according to testing result;
Dividing potential drop control module, control end is connected the output of described voltage detection module and the output of described division module, for adjusting the galvanic voltage of described dividing potential drop according to described control level signal to make the output level of described voltage comparator circuit correspondingly adjusted respectively with dividing potential drop adjustment end.
Another object of the present invention is also to provide a kind of Split type LED light fitting, and described Split type LED light fitting comprises LED lamp panel, driving power and above-mentioned driving power plug protective circuit.
The present invention comprises division module by adopting in the driving power of Split type LED light fitting, the driving power plug protective circuit of voltage detection module and dividing potential drop control module, when described driving power is not connected with LED lamp panel but incoming transport is powered, by described division module, step-down process is carried out to the output voltage of current rectifying and wave filtering circuit, and described driving power and LED lamp panel complete be connected after detected by the voltage of described voltage detection module to the first end of described resistance R4 after correspondingly export control level drive described dividing potential drop control module the to adjust galvanic voltage of dividing potential drop that described division module exports to make the output level of described voltage comparator circuit correspondingly adjusted, and then reach the feedback current that controls described driving power and drive to make the pwm control circuit of described driving power realize constant current according to described feedback current to LED lamp panel, thus ensure driving power can not make when completing be connected with LED lamp panel LED because of overcurrent reduction of service life, solve existing Split type LED light fitting in use to exist and be connected because not completing driving power and LED lamp panel and shift to an earlier date the LED overcurrent that incoming transport power supply station causes and the problem shortening the useful life of LED.
Accompanying drawing explanation
Fig. 1 is the function structure chart comprising the Split type LED light fitting of LED lamp panel, driving power and driving power plug protective circuit that the embodiment of the present invention provides;
Fig. 2 is the exemplary circuit structure chart of driving power plug protective circuit in Split type LED light fitting that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The embodiment of the present invention comprises division module by adopting in the driving power of Split type LED light fitting, the driving power plug protective circuit of voltage detection module and dividing potential drop control module, when driving power is not connected with LED lamp panel but incoming transport is powered, by division module, step-down process is carried out to the output voltage of current rectifying and wave filtering circuit, and driving power and LED lamp panel complete be connected after detected by the voltage of voltage detection module to the first end of resistance R4 after correspondingly export control level drive dividing potential drop control module the to adjust galvanic voltage of dividing potential drop that division module exports to make the output level of voltage comparator circuit correspondingly adjusted, and then the feedback current reaching control driving power drives to make the pwm control circuit of driving power realize constant current according to this feedback current to LED lamp panel, thus ensure driving power can not make when completing be connected with LED lamp panel LED because of overcurrent reduction of service life.
Fig. 1 shows the modular structure comprising the Split type LED light fitting of LED lamp panel, driving power and driving power plug protective circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only part related to the present invention, details are as follows:
The Split type LED light fitting that the embodiment of the present invention provides comprises LED lamp panel, driving power 100 and driving power plug protective circuit 200, is wherein manually connected by user between LED lamp panel with driving power 100.
As shown in Figure 1, driving power 100 comprises EMI filter circuit 101, rectification circuit 102, resistance R5, pwm control circuit 103, switching tube 104, absorbing circuit 105, feedback circuit 106, diode D1, resistance R6, transformer T1, current rectifying and wave filtering circuit 107, current sense resistor R7, optocoupler U1, diode D2, diode D3, resistance R8, resistance R9, resistance R10, electric capacity C1, divider resistance R1, divider resistance R2, divider resistance R3, resistance R4, current comparison circuit 108, a reference source TL and voltage comparator circuit 109.Wherein, divider resistance R1 is connected between the output of current rectifying and wave filtering circuit 107 and the first end of divider resistance R2, the first end being connected to resistance R4 altogether of divider resistance R2 and divider resistance R3, resistance R4 second end connect current comparison circuit 108 in-phase input end+, the output level of voltage comparator circuit 109 and the output level of current comparison circuit 108 control the feedback current that feedback circuit 106 exports jointly, make pwm control circuit 103 according to the output voltage of this feedback current adjustment transformer T1; Output and the first end of current sense resistor R7 of current rectifying and wave filtering circuit 107 are respectively used to the input LED+ and the output LED-that are connected LED lamp panel, and the anode of the light-emitting diode of optocoupler U1 is connected with the output of current rectifying and wave filtering circuit 107 and the first end of current sense resistor R7 respectively with the first end of resistance R10.
Driving power plug protective circuit 200, is connected with the current rectifying and wave filtering circuit 107 of driving power 100, divider resistance R1, divider resistance R2, divider resistance R3, resistance R4 and voltage comparator circuit 109; Driving power plug protective circuit 200 comprises:
Division module 201, input and output are connected the output of current rectifying and wave filtering circuit 107 and the inverting input of voltage comparator circuit 109 respectively, direct current for exporting current rectifying and wave filtering circuit 107 carries out voltage division processing to reduce described galvanic voltage, and exports a dividing potential drop direct current;
Voltage detection module 202, the first end of input contact resistance R4, the voltage for the first end to resistance R4 detects, and correspondingly exports control level signal according to testing result;
Dividing potential drop control module 203, control end is connected the output of voltage detection module 202 and the output of division module 201 respectively with dividing potential drop adjustment end, for adjusting the galvanic voltage of dividing potential drop of division module 201 output according to described control level signal to make the output level of voltage comparator circuit 109 correspondingly adjusted.
In embodiments of the present invention, current comparison circuit 108 and voltage comparator circuit 109 form the two poles of the earth voltage difference of OR circuit to the light-emitting diode of optocoupler U1 and regulate, and then the On current of the phototriode of optocoupler U1 is regulated, and the On current of the phototriode of optocoupler U1 can affect the feedback current that feedback circuit 106 exports, this feedback current directly determines the control of pwm control circuit 103 switch tube 104, thus determines the output voltage of transformer T1.Be below current comparison circuit 108 with the output level of voltage comparator circuit 109 to the adjustment process of transformer T1 output voltage:
When current comparison circuit 108 or voltage comparator circuit 109 export high level, the two poles of the earth voltage difference of the light-emitting diode of optocoupler U1 reduces, the then corresponding reduction of the On current of the phototriode of optocoupler U1, feedback circuit 106 exports the feedback current also corresponding reduction of pwm control circuit 103 to, then pwm control circuit 103 increases the duty ratio that it exports the pulse signal of switching tube 104 to, thus increased the primary voltage of transformer T1 by switching tube 104, so the secondary output voltage of transformer T1 also can increase thereupon;
When current comparison circuit 108 and voltage comparator circuit 109 while during output low level, the two poles of the earth voltage difference of the light-emitting diode of optocoupler U1 increases, the then corresponding increase of the On current of the phototriode of optocoupler U1, feedback circuit 106 exports the feedback current also corresponding increase of pwm control circuit 103 to, then pwm control circuit 103 reduces the duty ratio that it exports the pulse signal of switching tube 104 to, thus reduced the primary voltage of transformer T1 by switching tube 104, so the secondary output voltage of transformer T1 also can reduce thereupon;
When current comparison circuit 108 exports high level with voltage comparator circuit 109 simultaneously, the two poles of the earth voltage difference of the light-emitting diode of optocoupler U1 reduces, the then corresponding reduction of the On current of the phototriode of optocoupler U1, feedback circuit 106 exports the feedback current also corresponding reduction of pwm control circuit 103 to, then pwm control circuit 103 increases the duty ratio that it exports the pulse signal of switching tube 104 to, thus increased the primary voltage of transformer T1 by switching tube 104, so the secondary output voltage of transformer T1 also can increase thereupon.
Fig. 2 shows the exemplary circuit structure of driving power plug protective circuit in Split type LED light fitting that the embodiment of the present invention provides, and for convenience of explanation, illustrate only part related to the present invention, details are as follows:
As one embodiment of the present invention, division module 201 comprises resistance R11 and resistance R12, the first end of resistance R11 is the input of division module 201, the common contact of second end of resistance R11 and the first end of resistance R12 as the output of division module 201, the second end ground connection of resistance R12.
As one embodiment of the present invention, voltage detection module 202 comprises:
Resistance R13, resistance R14, comparator U2, resistance R15 and electric capacity C2;
The first end of resistance R13 is the input of voltage detection module 202, second end of resistance R13 and the first end of resistance R14 are connected to the in-phase input end of comparator U2 altogether, second end of resistance R14 and the inverting input of comparator U2 are connected to ground altogether, positive power source terminal and the negative power end of comparator U2 are connected DC power supply VCC and ground respectively, the output of comparator U2 is the output of voltage detection module 202, resistance R15 is connected between the output of comparator U2 and the first end of electric capacity C2, and second end of electric capacity C2 connects the inverting input of comparator U2.Wherein, the output voltage of DC power supply VCC can be+5V.
As one embodiment of the present invention, dividing potential drop control module 203 comprises NPN type triode Q1 and resistance R16, the base stage of NPN type triode Q1 is the control end of dividing potential drop control module 203, the grounded emitter of NPN type triode Q1, the first end of resistance R16 connects the collector electrode of NPN type triode Q1, and second end of resistance R16 is the dividing potential drop adjustment end of dividing potential drop control module 203.
Below in conjunction with operation principle, above-mentioned driving power plug protective circuit 200 is described further:
In this operation principle, after making resistance R11 and resistance R12 that the output voltage of current rectifying and wave filtering circuit 107 is carried out dividing potential drop by the resistance of selected resistance R11 and resistance R12, this output voltage reduces to the half of LED rated voltage, then the output voltage of driving power 200 when zero load just only has the half of LED rated voltage.When user first by driving power 200 incoming transport electricity but when it not being connected with LED lamp panel, the output voltage (half for LED rated voltage) of driving power 200 is carried in the input LED+ of LED in the moment completing connection, damage would not be caused like this to LED, and the LED now in LED lamp panel has electric current to pass through, and pressure drop is produced on current sense resistor R7, this pressure drop by resistance R10 be carried in the inverting input of current comparison circuit 108-, and due to the voltage of resistance R1 and resistance R2 to the input LED+ of LED lamp panel carry out the in-phase input end of input voltage comparison circuit 109 after dividing potential drop+, and the common contact of resistance R2 and resistance R3 produces dividing potential drop direct current equally simultaneously, this dividing potential drop direct current divides two-way to enter the in-phase input end+of current comparison circuit 108 and the in-phase input end of comparator U2 respectively through resistance R4 and resistance R13, when the galvanic voltage of this dividing potential drop is greater than the voltage of the inverting input of comparator U2, comparator U2 can export high level and control NPN type triode Q1 conducting, and then make NPN type triode Q1 draw electric current by resistance R16 from the common contact of resistance R11 and resistance R12, simultaneously because resistance R16 is in parallel with resistance R12, so now the common contact of resistance R11 and resistance R12 can reduce, so voltage comparator circuit 109 just can export high level, and then by resistance R9 and diode D3, the two poles of the earth voltage difference of the light-emitting diode of optocoupler U1 is reduced, the then corresponding reduction of the On current of the phototriode of optocoupler U1, the feedback current that then feedback circuit 106 feeds back to pwm control circuit 103 also can reduce, so pwm control circuit 103 increases the duty ratio of the pulse signal that it exports, the primary voltage of transformer T1 so just can be increased by switching tube 104, and then make the secondary output voltage of transformer T1 increase (referring to when not arriving LED rated voltage) herein, thus the steady voltage exporting LED lamp panel to that promotes makes LED be in constant current operation state.
The embodiment of the present invention comprises division module by adopting in Split type LED light fitting, the driving power plug protective circuit of voltage detection module and dividing potential drop control module, when driving power is not connected with LED lamp panel but incoming transport is powered, by division module, step-down process is carried out to the output voltage of current rectifying and wave filtering circuit, and driving power and LED lamp panel complete be connected after detected by the voltage of voltage detection module to the first end of resistance R4 after correspondingly export control level drive dividing potential drop control module the to adjust galvanic voltage of dividing potential drop that division module exports to make the output level of voltage comparator circuit correspondingly adjusted, and then the feedback current reaching control driving power drives to make the pwm control circuit of driving power realize constant current according to this feedback current to LED lamp panel, thus ensure driving power can not make when completing be connected with LED lamp panel LED because of overcurrent reduction of service life.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the driving power plug protective circuit of a Split type LED light fitting, with the current rectifying and wave filtering circuit of driving power, divider resistance R1, divider resistance R2, divider resistance R3, resistance R4 and voltage comparator circuit connect, described divider resistance R1 is connected between the output of described current rectifying and wave filtering circuit and the first end of described divider resistance R2, the first end being connected to described resistance R4 altogether of described divider resistance R2 and described divider resistance R3, second end of described resistance R4 connects the in-phase input end of current comparison circuit, the output level of described voltage comparator circuit and the output level of described current comparison circuit control the feedback current that the feedback circuit of described driving power exports jointly, the pwm control circuit of described driving power is made to adjust the output voltage of the transformer T1 of described driving power according to described feedback current, it is characterized in that, described driving power plug protective circuit comprises:
Division module, input and output are connected the output of described current rectifying and wave filtering circuit and the inverting input of described voltage comparator circuit respectively, direct current for exporting described current rectifying and wave filtering circuit carries out voltage division processing to reduce described galvanic voltage, and exports a dividing potential drop direct current;
Voltage detection module, input connects the first end of described resistance R4, and the voltage for the first end to described resistance R4 detects, and correspondingly exports control level signal according to testing result;
Dividing potential drop control module, control end is connected the output of described voltage detection module and the output of described division module, for adjusting the galvanic voltage of described dividing potential drop according to described control level signal to make the output level of described voltage comparator circuit correspondingly adjusted respectively with dividing potential drop adjustment end;
Described voltage detection module comprises:
Resistance R13, resistance R14, comparator, resistance R15 and electric capacity C2;
The first end of described resistance R13 is the input of described voltage detection module, second end of described resistance R13 and the first end of described resistance R14 are connected to the in-phase input end of described comparator altogether, second end of described resistance R14 and the inverting input of described comparator are connected to ground altogether, positive power source terminal and the negative power end of described comparator are connected described DC power supply and ground respectively, the output of described comparator is the output of described voltage detection module, described resistance R15 is connected between the output of described comparator and the first end of described electric capacity C2, second end of described electric capacity C2 connects the inverting input of described comparator.
2. driving power plug protective circuit as claimed in claim 1; it is characterized in that; described division module comprises resistance R11 and resistance R12; the first end of described resistance R11 is the input of described division module; the common contact of second end of described resistance R11 and the first end of described resistance R12 as the output of described division module, the second end ground connection of described resistance R12.
3. driving power plug protective circuit as claimed in claim 1; it is characterized in that; described dividing potential drop control module comprises NPN type triode Q1 and resistance R16; the base stage of described NPN type triode Q1 is the control end of described dividing potential drop control module; the grounded emitter of described NPN type triode Q1; the first end of described resistance R16 connects the collector electrode of described NPN type triode Q1, and second end of described resistance R16 is the dividing potential drop adjustment end of described dividing potential drop control module.
4. a Split type LED light fitting, comprise LED lamp panel and driving power, it is characterized in that, described Split type LED light fitting also comprises a driving power plug protective circuit, the current rectifying and wave filtering circuit of described driving power plug protective circuit and described driving power, divider resistance R1, divider resistance R2, divider resistance R3, resistance R4 and voltage comparator circuit connect, described divider resistance R1 is connected between the output of described current rectifying and wave filtering circuit and the first end of described divider resistance R2, the first end being connected to described resistance R4 altogether of described divider resistance R2 and described divider resistance R3, second end of described resistance R4 connects the in-phase input end of current comparison circuit, the output level of described voltage comparator circuit and the output level of described current comparison circuit control the feedback current that the feedback circuit of described driving power exports jointly, the pwm control circuit of described driving power is made to adjust the output voltage of the transformer T1 of described driving power according to described feedback current,
Described driving power plug protective circuit comprises:
Division module, input and output are connected the output of described current rectifying and wave filtering circuit and the inverting input of described voltage comparator circuit respectively, direct current for exporting described current rectifying and wave filtering circuit carries out voltage division processing to reduce described galvanic voltage, and exports a dividing potential drop direct current;
Voltage detection module, input connects the first end of described resistance R4, and the voltage for the first end to described resistance R4 detects, and correspondingly exports control level signal according to testing result;
Dividing potential drop control module, control end is connected the output of described voltage detection module and the output of described division module, for adjusting the galvanic voltage of described dividing potential drop according to described control level signal to make the output level of described voltage comparator circuit correspondingly adjusted respectively with dividing potential drop adjustment end;
Described voltage detection module comprises:
Resistance R13, resistance R14, comparator, resistance R15 and electric capacity C2;
The first end of described resistance R13 is the input of described voltage detection module, second end of described resistance R13 and the first end of described resistance R14 are connected to the in-phase input end of described comparator altogether, second end of described resistance R14 and the inverting input of described comparator are connected to ground altogether, positive power source terminal and the negative power end of described comparator are connected described DC power supply and ground respectively, the output of described comparator is the output of described voltage detection module, described resistance R15 is connected between the output of described comparator and the first end of described electric capacity C2, second end of described electric capacity C2 connects the inverting input of described comparator.
5. Split type LED light fitting as claimed in claim 4, it is characterized in that, described division module comprises resistance R11 and resistance R12, the first end of described resistance R11 is the input of described division module, the common contact of second end of described resistance R11 and the first end of described resistance R12 as the output of described division module, the second end ground connection of described resistance R12.
6. Split type LED light fitting as claimed in claim 4, it is characterized in that, described dividing potential drop control module comprises NPN type triode Q1 and resistance R16, the base stage of described NPN type triode Q1 is the control end of described dividing potential drop control module, the grounded emitter of described NPN type triode Q1, the first end of described resistance R16 connects the collector electrode of described NPN type triode Q1, and second end of described resistance R16 is the dividing potential drop adjustment end of described dividing potential drop control module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210560121.2A CN103037585B (en) | 2012-12-21 | 2012-12-21 | Distributed light-emitting diode (LED) lamp and drive power supply plug-in plug-out protective circuit thereof |
| PCT/CN2013/090075 WO2014094648A1 (en) | 2012-12-21 | 2013-12-20 | Split led lamp and driving power supply insertion and extraction protection circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210560121.2A CN103037585B (en) | 2012-12-21 | 2012-12-21 | Distributed light-emitting diode (LED) lamp and drive power supply plug-in plug-out protective circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103037585A CN103037585A (en) | 2013-04-10 |
| CN103037585B true CN103037585B (en) | 2014-12-17 |
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| CN201210560121.2A Expired - Fee Related CN103037585B (en) | 2012-12-21 | 2012-12-21 | Distributed light-emitting diode (LED) lamp and drive power supply plug-in plug-out protective circuit thereof |
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| WO (1) | WO2014094648A1 (en) |
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| CN103037585B (en) * | 2012-12-21 | 2014-12-17 | 深圳桑达百利电器有限公司 | Distributed light-emitting diode (LED) lamp and drive power supply plug-in plug-out protective circuit thereof |
| CN104684219B (en) * | 2015-03-09 | 2017-05-10 | 北京幻腾科技有限公司 | LED lighting device and drive circuit |
| CN107453718B (en) * | 2017-09-26 | 2023-05-16 | 佛山市南海蜚声演出器材制造有限公司 | Non-current triggering detection protection circuit of power amplifier |
| CN108882461B (en) * | 2018-07-27 | 2023-07-14 | 深圳市明微电子股份有限公司 | Dimming control circuit and system |
| CN109256829A (en) * | 2018-08-13 | 2019-01-22 | 浙江特康电子科技有限公司 | Charger output voltage auto-adjusting circuit |
| CN110428595B (en) * | 2019-08-29 | 2024-08-06 | 南京新中安未来文旅科技有限公司 | Intelligent alarm post |
| CN111065184B (en) * | 2019-12-16 | 2021-12-28 | 杭州优特电源有限公司 | Hot-pluggable LED driving power supply and control method thereof |
| CN111122961A (en) * | 2020-01-18 | 2020-05-08 | 宁波奥克斯电气股份有限公司 | Current sampling circuit and fan driving system |
| CN112996192A (en) * | 2021-02-24 | 2021-06-18 | 上海穆萨电子科技有限公司 | LED drive circuit |
| CN114879790B (en) * | 2022-04-27 | 2023-07-18 | 华荣科技股份有限公司 | Irradiation-resistant constant current source circuit with light source protection function |
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| CN101350553A (en) * | 2007-07-16 | 2009-01-21 | 通嘉科技股份有限公司 | Power switching circuit with load open circuit protection |
| JP5629191B2 (en) * | 2010-05-28 | 2014-11-19 | ルネサスエレクトロニクス株式会社 | Power supply |
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| CN103037585B (en) * | 2012-12-21 | 2014-12-17 | 深圳桑达百利电器有限公司 | Distributed light-emitting diode (LED) lamp and drive power supply plug-in plug-out protective circuit thereof |
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2012
- 2012-12-21 CN CN201210560121.2A patent/CN103037585B/en not_active Expired - Fee Related
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2013
- 2013-12-20 WO PCT/CN2013/090075 patent/WO2014094648A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101489335A (en) * | 2008-01-18 | 2009-07-22 | 尼克森微电子股份有限公司 | LED driving circuit and secondary side controller thereof |
| CN203039967U (en) * | 2012-12-21 | 2013-07-03 | 深圳桑达百利电器有限公司 | Split LED lamp and split LED lamp driving power supply insertion and extraction protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103037585A (en) | 2013-04-10 |
| WO2014094648A1 (en) | 2014-06-26 |
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Inventor after: Wang Chengguo Inventor before: Wang Guoqiu Inventor before: Wu Yunbo |
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Effective date of registration: 20170116 Address after: 310000 Hangzhou City, Jianggan District province Qian Tang aviation building, room 2, building 3506, room Patentee after: Hangzhou Zhejiang three beam Lighting Co.,Ltd. Address before: 518000 Nanshan District science and technology road, Guangdong, SED Arts crafts emporium Patentee before: SHENZHEN SED INDUSTRY Co.,Ltd. Patentee before: SHENZHEN SED INTERNATIONAL POWER TECHNOLOGY Co.,Ltd. |
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| CI01 | Publication of corrected invention patent application |
Correction item: Patentee|Address Correct: Hangzhou three Lighting Co., Ltd.|310000 Hangzhou City, Jianggan District province Qian Tang aviation building, room 2, building 3506, room False: Hangzhou Zhejiang three beam Lighting Co., Ltd.|310000 Hangzhou Qian Tang Jianggan District aviation building, room 2, building 3506 Number: 31 Volume: 31 |
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