CN203039967U - Split LED lamp and split LED lamp driving power supply insertion and extraction protection circuit - Google Patents
Split LED lamp and split LED lamp driving power supply insertion and extraction protection circuit Download PDFInfo
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- CN203039967U CN203039967U CN 201220712375 CN201220712375U CN203039967U CN 203039967 U CN203039967 U CN 203039967U CN 201220712375 CN201220712375 CN 201220712375 CN 201220712375 U CN201220712375 U CN 201220712375U CN 203039967 U CN203039967 U CN 203039967U
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Abstract
The utility model is suitable for the field of LED driving, and provides a split LED lamp and a split LED lamp driving power supply insertion and extraction protection circuit. According to the utility model, when a driving power supply is not connected with an LED lamp board but is connected with an alternating current power supply, a voltage dividing module carries out step-down treatment on output voltage of a rectification filter circuit; after the driving power supply is connected with the LED lamp board, and after a voltage detection module detects the voltage of a first end of a resistor R4, a control level is correspondingly output to drive a voltage dividing control module to adjust the voltage of voltage dividing direct current output by the voltage dividing module, so that output level of a voltage comparison circuit is correspondingly adjusted; feedback current of the driving power supply is controlled, so that a PWM control circuit of the driving power supply carries out constant current driving on the LED lamp board according to the feedback current; and when the driving power supply is connected with the LED lamp board, the problem that the service life of an LED is shortened due to overcurrent is prevented.
Description
Technical field
The utility model belongs to LED and drives the field, relates in particular to a kind of split type LED light fixture and driving power thereof plug protective circuit.
Background technology
At present, the LED light fixture is as a kind of novel illuminating product, its technology is full maturity not as yet, and country yet do not specify unified standard at the LED light fixture, and the structure of the driving of an existing LED light fixture power supply and LED lamp plate mainly is divided into integral type and split type two kinds.Because the driving power of the LED light fixture of integral type and the radiating effect that the LED lamp plate integrates can be poorer than split type LED light fixture, so, the development trend that standardized split type LED light fixture is following LED light fixture.
Because LED is made by semi-conducting material, powers to guarantee operate as normal so it need obtain constant current.Just can incoming transport after existing split type LED light fixture all requires LED lamp plate and driving power to finish to be connected, reason is to power if do not finish under the situation about being connected first incoming transport electricity with driving power at the LED lamp plate, then can make driving power be in the constant voltage output mode, and be form output DC with maximum voltage under the constant voltage output mode, can make the conducting electric current of LED greater than its peak inrush current like this, and then LED is produced the useful life of damaging and influencing LED.And in user's regular job, if adopt the latter linked mode of operation of power supply earlier, then can make the LED overcurrent and shorten useful life of LED, also can directly damage the LED lamp plate when serious.Therefore, existing split type LED light fixture in use exists because driving power and LED lamp plate not being finished to be connected and shifts to an earlier date the LED overcurrent that incoming transport power supply station causes and the problem that shortens the useful life of LED.
The utility model content
The purpose of this utility model is to provide a kind of driving power plug protective circuit of split type LED light fixture, is intended to solve existing split type LED light fixture and in use exists because driving power and LED lamp plate not being finished the problem that is connected the useful life that shifts to an earlier date LED overcurrent that incoming transport power supply station causes and shortening LED.
The utility model is to realize like this, a kind of driving power plug protective circuit of split type LED light fixture, current rectifying and wave filtering circuit with driving power, divider resistance R1, divider resistance R2, divider resistance R3, resistance R 4 and voltage comparator circuit connect, described divider resistance R1 is connected between first end of the output of described current rectifying and wave filtering circuit and described divider resistance R2, first end that is connected to described resistance R 4 altogether of described divider resistance R2 and described divider resistance R3, second end of described resistance R 4 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 are controlled the feedback current that the feedback circuit of described driving power is exported jointly, make the pwm control circuit of described driving power adjust the output voltage of the transformer T1 of described driving power according to described feedback current; Described driving power plug protective circuit comprises:
Input is connected the output of described current rectifying and wave filtering circuit and the inverting input of described voltage comparator circuit respectively with output, the direct current of described current rectifying and wave filtering circuit output is carried out voltage division processing reducing described galvanic voltage, and export the galvanic division module of a dividing potential drop;
Input connects first end of described resistance R 4, is used for the voltage of first end of described resistance R 4 is detected, and correspondingly exports control level voltage of signals detection module according to testing result;
Control end is connected the output of described voltage detection module and the output of described division module respectively with dividing potential drop adjustment end, adjusts the galvanic voltage of described dividing potential drop so that the output level of described voltage comparator circuit adjusted dividing potential drop control module correspondingly according to described control level signal.
Another purpose of the present utility model also is to provide a kind of split type LED light fixture, and described split type LED light fixture comprises LED lamp plate, driving power and above-mentioned driving power plug protective circuit.
The utility model comprises division module by adopting in the driving power of split type LED light fixture; the driving power plug protective circuit of voltage detection module and dividing potential drop control module; be not connected with the LED lamp plate but incoming transport when power supply at described driving power; by described division module the output voltage of current rectifying and wave filtering circuit being carried out step-down handles; and finish to be connected at described driving power and LED lamp plate and correspondingly export control level after the back is detected the voltage of first end of described resistance R 4 by described voltage detection module and drive described dividing potential drop control module and adjust the galvanic voltage of dividing potential drop that described division module exports so that the output level of described voltage comparator circuit is correspondingly adjusted; and then reach the feedback current of the described driving power of control so that the pwm control circuit of described driving power realizes that to the LED lamp plate constant current drives according to described feedback current; thereby guaranteeing that driving power and LED lamp plate are finished can not make LED because of overcurrent reduction of service life when being connected, and has solved existing split type LED light fixture and has in use existed because driving power and LED lamp plate not being finished the problem that is connected the useful life that shifts to an earlier date LED overcurrent that incoming transport power supply station causes and shortening LED.
Description of drawings
Fig. 1 is that comprise LED lamp plate, driving power and the driving power that the utility model embodiment provides plugs the modular structure figure of the split type LED light fixture of protective circuit;
Fig. 2 is the exemplary circuit structure chart of driving power plug protective circuit in split type LED light fixture that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model embodiment comprises division module by adopting in the driving power of split type LED light fixture; the driving power plug protective circuit of voltage detection module and dividing potential drop control module; be not connected with the LED lamp plate but incoming transport when power supply at driving power; by division module the output voltage of current rectifying and wave filtering circuit being carried out step-down handles; and finish to be connected at driving power and LED lamp plate and correspondingly export control level after the back is detected the voltage of first end of resistance R 4 by voltage detection module and drive the dividing potential drop control module and adjust the galvanic voltage of dividing potential drop that division module exports so that the output level of voltage comparator circuit is correspondingly adjusted; and then reach the feedback current of control driving power so that the pwm control circuit of driving power realizes that to the LED lamp plate constant current drives according to this feedback current, thereby guaranteeing that driving power and LED lamp plate are finished can not make LED because of overcurrent reduction of service life when being connected.
Comprise LED lamp plate, driving power and driving power that Fig. 1 shows the utility model embodiment to be provided plug the modular structure of the split type LED light fixture of protective circuit, for convenience of explanation, only show the part relevant with the utility model, and details are as follows:
The split type LED light fixture that the utility model embodiment provides comprises LED lamp plate, driving power 100 and driving power plug protective circuit 200, wherein manually is connected by the user between LED lamp plate and the driving power 100.
As shown in Figure 1, driving power 100 comprises EMI filter circuit 101, rectification circuit 102, resistance R 5, pwm control circuit 103, switching tube 104, absorbs circuit 105, feedback circuit 106, diode D1, resistance R 6, transformer T1, current rectifying and wave filtering circuit 107, current sense resistor R7, optocoupler U1, diode D2, diode D3, resistance R 8, resistance R 9, resistance R 10, capacitor C 1, divider resistance R1, divider resistance R2, divider resistance R3, resistance R 4, current comparison circuit 108, a reference source TL and voltage comparator circuit 109.Wherein, divider resistance R1 is connected between first end of the output of current rectifying and wave filtering circuit 107 and divider resistance R2, first end that is connected to resistance R 4 altogether of divider resistance R2 and divider resistance R3, the in-phase input end of second end connection current comparison circuit 108 of resistance R 4+, the output level of the output level of voltage comparator circuit 109 and current comparison circuit 108 is controlled the feedback current that feedback circuit 106 is exported jointly, makes pwm control circuit 103 adjust the output voltage of transformer T1 according to this feedback current; First end of the output of current rectifying and wave filtering circuit 107 and current sense resistor R7 is respectively applied to be connected input LED+ and the output LED-of LED lamp plate, and first end of the anode of the light-emitting diode of optocoupler U1 and resistance R 10 is connected with the output of current rectifying and wave filtering circuit 107 and first end of current sense resistor R7 respectively.
Driving power plug protective circuit 200 is connected with current rectifying and wave filtering circuit 107, divider resistance R1, divider resistance R2, divider resistance R3, resistance R 4 and the voltage comparator circuit 109 of driving power 100; Driving power plug protective circuit 200 comprises:
Input is connected the output of current rectifying and wave filtering circuit 107 and the inverting input of voltage comparator circuit 109 respectively with output, the direct current of current rectifying and wave filtering circuit 107 output is carried out voltage division processing reducing described galvanic voltage, and export the galvanic division module 201 of a dividing potential drop;
Input connects first end of resistance R 4, the voltage of first end of resistance R 4 is detected, and correspondingly export control level voltage of signals detection module 202 according to testing result;
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, adjusts the galvanic voltage of dividing potential drop of division module 201 outputs so that the output level of voltage comparator circuit 109 adjusted dividing potential drop control module 203 correspondingly according to described control level signal.
In the utility model embodiment, current comparison circuit 108 is formed OR circuit with voltage comparator circuit 109 the two poles of the earth voltage difference of the light-emitting diode of optocoupler U1 is regulated, and then the conducting electric current of the phototriode of optocoupler U1 regulated, and the conducting electric current of the phototriode of optocoupler U1 can influence the feedback current of feedback circuit 106 outputs, this feedback current directly determines the control of 103 pairs of switching tubes 104 of pwm control circuit, thereby has determined the output voltage of transformer T1.Below be current comparison circuit 108 and the adjustment process of the output level of voltage comparator circuit 109 to transformer T1 output voltage:
When current comparison circuit 108 or voltage comparator circuit 109 output high level, the two poles of the earth voltage difference of the light-emitting diode of optocoupler U1 reduces, corresponding the reducing of conducting electric current of the phototriode of optocoupler U1 then, the feedback current that feedback circuit 106 exports pwm control circuit 103 to is corresponding reducing also, then pwm control circuit 103 increases it and exports the duty ratio of the pulse signal of switching tube 104 to, thereby by the primary voltage of switching tube 104 increase transformer T1, so the secondary output voltage of transformer T1 also can increase thereupon;
When current comparison circuit 108 and voltage comparator circuit 109 simultaneously 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 conducting electric current of the phototriode of optocoupler U1, feedback circuit 106 exports the also corresponding increase of feedback current of pwm control circuit 103 to, then pwm control circuit 103 reduces its duty ratio that exports the pulse signal of switching tube 104 to, thereby reduce 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 and voltage comparator circuit 109 are exported high level simultaneously, the two poles of the earth voltage difference of the light-emitting diode of optocoupler U1 reduces, corresponding the reducing of conducting electric current of the phototriode of optocoupler U1 then, the feedback current that feedback circuit 106 exports pwm control circuit 103 to is corresponding reducing also, then pwm control circuit 103 increases it and exports the duty ratio of the pulse signal of switching tube 104 to, thereby by the primary voltage of switching tube 104 increase transformer T1, 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 fixture that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model, and details are as follows:
As the utility model one preferred embodiment, division module 201 comprises resistance R 11 and resistance R 12, first end of resistance R 11 is the input of division module 201, the common contact of second end of resistance R 11 and first end of resistance R 12 is as the output of division module 201, the second end ground connection of resistance R 12.
As the utility model one preferred embodiment, voltage detection module 202 comprises:
Resistance R 13, resistance R 14, comparator U2, resistance R 15 and capacitor C 2;
First end of resistance R 13 is the input of voltage detection module 202, second end of resistance R 13 and first end of resistance R 14 are connected to the in-phase input end of comparator U2 altogether, second end of resistance R 14 and the inverting input of comparator U2 are connected to ground altogether, the positive power source terminal of comparator U2 is connected DC power supply VCC and ground respectively with negative power end, the output of comparator U2 is the output of voltage detection module 202, resistance R 15 is connected between first end of the output of comparator U2 and capacitor C 2, and second end of capacitor C 2 connects the inverting input of comparator U2.Wherein, the output voltage of DC power supply VCC can be+5V.
As the utility model one preferred embodiment, dividing potential drop control module 203 comprises NPN type triode Q1 and resistance R 16, 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, first end of resistance R 16 connects the collector electrode of NPN type triode Q1, and second end of resistance R 16 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 resistance by selected resistance R 11 and resistance R 12 makes resistance R 11 and resistance R 12 that the output voltage of current rectifying and wave filtering circuit 107 is carried out dividing potential drop, this output voltage is reduced to half of LED rated voltage, and then the output voltage of driving power 200 when zero load just has only half of LED rated voltage.As user earlier with driving power 200 incoming transports electricity but when it not being connected with the LED lamp plate, the output voltage of driving power 200 (for half of LED rated voltage) is carried in the input LED+ of LED in the moment of finishing connection, so just can not cause damage to LED, and the LED on the LED lamp plate has electric current to pass through at this moment, and R7 produces pressure drop at current sense resistor, this pressure drop by resistance R 10 be carried in the inverting input of current comparison circuit 108-, and since the voltage of resistance R 1 and the input LED+ of 2 pairs of LED lamp plates of resistance R carry out the in-phase input end of input voltage comparison circuit 109 after the dividing potential drop+, and the common contact of resistance R 2 and resistance R 3 produces the 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 in-phase input end of comparator U2 through resistance R 4 and resistance R 13 respectively, when the galvanic voltage of this dividing potential drop during greater than the voltage of the inverting input of comparator U2, comparator U2 can export high level control NPN type triode Q1 conducting, and then make NPN type triode Q1 draw electric current by resistance R 16 from the common contact of resistance R 11 and resistance R 12, simultaneously because resistance R 16 is in parallel with resistance R 12, so this moment, resistance R 11 can reduce with the common contact of resistance R 12, voltage comparator circuit 109 just can be exported high level so, and then by resistance R 9 and diode D3 the two poles of the earth voltage difference of the light-emitting diode of optocoupler U1 is reduced, corresponding the reducing of conducting electric current of the phototriode of optocoupler U1 then, then feedback circuit 106 feedback current that feeds back to pwm control circuit 103 also can reduce, so pwm control circuit 103 increases the duty ratio of its pulse signal of exporting, so just can increase the primary voltage of transformer T1 by switching tube 104, and then make the secondary output voltage of transformer T1 increase (referring to when no show LED rated voltage) herein, make LED be in the constant current operating state thereby promote the voltage that exports the LED lamp plate to steadily.
The utility model embodiment comprises division module by adopting in split type LED light fixture; the driving power plug protective circuit of voltage detection module and dividing potential drop control module; be not connected with the LED lamp plate but incoming transport when power supply at driving power; by division module the output voltage of current rectifying and wave filtering circuit being carried out step-down handles; and finish to be connected at driving power and LED lamp plate and correspondingly export control level after the back is detected the voltage of first end of resistance R 4 by voltage detection module and drive the dividing potential drop control module and adjust the galvanic voltage of dividing potential drop that division module exports so that the output level of voltage comparator circuit is correspondingly adjusted; and then reach the feedback current of control driving power so that the pwm control circuit of driving power realizes that to the LED lamp plate constant current drives according to this feedback current, thereby guaranteeing that driving power and LED lamp plate are finished can not make LED because of overcurrent reduction of service life when being connected.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. the driving power of a split type LED light fixture plugs protective circuit, current rectifying and wave filtering circuit with driving power, divider resistance R1, divider resistance R2, divider resistance R3, resistance R 4 and voltage comparator circuit connect, described divider resistance R1 is connected between first end of the output of described current rectifying and wave filtering circuit and described divider resistance R2, first end that is connected to described resistance R 4 altogether of described divider resistance R2 and described divider resistance R3, second end of described resistance R 4 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 are controlled the feedback current that the feedback circuit of described driving power is exported jointly, make the pwm control circuit of described driving power 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:
Input is connected the output of described current rectifying and wave filtering circuit and the inverting input of described voltage comparator circuit respectively with output, the direct current of described current rectifying and wave filtering circuit output is carried out voltage division processing reducing described galvanic voltage, and export the galvanic division module of a dividing potential drop;
Input connects first end of described resistance R 4, is used for the voltage of first end of described resistance R 4 is detected, and correspondingly exports control level voltage of signals detection module according to testing result;
Control end is connected the output of described voltage detection module and the output of described division module respectively with dividing potential drop adjustment end, adjusts the galvanic voltage of described dividing potential drop so that the output level of described voltage comparator circuit adjusted dividing potential drop control module correspondingly according to described control level signal.
2. driving power as claimed in claim 1 plugs protective circuit; it is characterized in that; described division module comprises resistance R 11 and resistance R 12; first end of described resistance R 11 is the input of described division module; the common contact of second end of described resistance R 11 and first end of described resistance R 12 is as the output of described division module, the second end ground connection of described resistance R 12.
3. driving power as claimed in claim 1 plugs protective circuit, it is characterized in that described voltage detection module comprises:
Resistance R 13, resistance R 14, comparator, resistance R 15 and capacitor C 2;
First end of described resistance R 13 is the input of described voltage detection module, second end of described resistance R 13 and first end of described resistance R 14 are connected to the in-phase input end of described comparator altogether, second end of described resistance R 14 and the inverting input of described comparator are connected to ground altogether, the positive power source terminal of described comparator is connected described DC power supply and ground respectively with negative power end, the output of described comparator is the output of described voltage detection module, described resistance R 15 is connected between first end of the output of described comparator and described capacitor C 2, and second end of described capacitor C 2 connects the inverting input of described comparator.
4. driving power as claimed in claim 1 plugs protective circuit; it is characterized in that; described dividing potential drop control module comprises NPN type triode Q1 and resistance R 16; 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; first end of described resistance R 16 connects the collector electrode of described NPN type triode Q1, and second end of described resistance R 16 is the dividing potential drop adjustment end of described dividing potential drop control module.
5. split type LED light fixture, comprise LED lamp plate and driving power, it is characterized in that, described split type LED light fixture also comprises 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 R 4 and voltage comparator circuit connect, described divider resistance R1 is connected between first end of the output of described current rectifying and wave filtering circuit and described divider resistance R2, first end that is connected to described resistance R 4 altogether of described divider resistance R2 and described divider resistance R3, second end of described resistance R 4 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 are controlled the feedback current that the feedback circuit of described driving power is exported jointly, make the pwm control circuit of described driving power adjust the output voltage of the transformer T1 of described driving power according to described feedback current;
Described driving power plug protective circuit comprises:
Input is connected the output of described current rectifying and wave filtering circuit and the inverting input of described voltage comparator circuit respectively with output, the direct current of described current rectifying and wave filtering circuit output is carried out voltage division processing reducing described galvanic voltage, and export the galvanic division module of a dividing potential drop;
Input connects first end of described resistance R 4, is used for the voltage of first end of described resistance R 4 is detected, and correspondingly exports control level voltage of signals detection module according to testing result;
Control end is connected the output of described voltage detection module and the output of described division module respectively with dividing potential drop adjustment end, adjusts the galvanic voltage of described dividing potential drop so that the output level of described voltage comparator circuit adjusted dividing potential drop control module correspondingly according to described control level signal.
6. split type LED light fixture as claimed in claim 5, it is characterized in that, described division module comprises resistance R 11 and resistance R 12, first end of described resistance R 11 is the input of described division module, the common contact of second end of described resistance R 11 and first end of described resistance R 12 is as the output of described division module, the second end ground connection of described resistance R 12.
7. split type LED light fixture as claimed in claim 5 is characterized in that described voltage detection module comprises:
Resistance R 13, resistance R 14, comparator, resistance R 15 and capacitor C 2;
First end of described resistance R 13 is the input of described voltage detection module, second end of described resistance R 13 and first end of described resistance R 14 are connected to the in-phase input end of described comparator altogether, second end of described resistance R 14 and the inverting input of described comparator are connected to ground altogether, the positive power source terminal of described comparator is connected described DC power supply and ground respectively with negative power end, the output of described comparator is the output of described voltage detection module, described resistance R 15 is connected between first end of the output of described comparator and described capacitor C 2, and second end of described capacitor C 2 connects the inverting input of described comparator.
8. split type LED light fixture as claimed in claim 5, it is characterized in that, described dividing potential drop control module comprises NPN type triode Q1 and resistance R 16, 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, first end of described resistance R 16 connects the collector electrode of described NPN type triode Q1, and second end of described resistance R 16 is the dividing potential drop adjustment end of described dividing potential drop control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712375 CN203039967U (en) | 2012-12-21 | 2012-12-21 | Split LED lamp and split LED lamp driving power supply insertion and extraction protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712375 CN203039967U (en) | 2012-12-21 | 2012-12-21 | Split LED lamp and split LED lamp driving power supply insertion and extraction protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203039967U true CN203039967U (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220712375 Withdrawn - After Issue CN203039967U (en) | 2012-12-21 | 2012-12-21 | Split LED lamp and split LED lamp driving power supply insertion and extraction protection circuit |
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|---|---|
| CN (1) | CN203039967U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103037585A (en) * | 2012-12-21 | 2013-04-10 | 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 |
| CN103762859A (en) * | 2014-02-26 | 2014-04-30 | 杨华新 | Non-electrolytic isolated type syntonic switching power supply |
-
2012
- 2012-12-21 CN CN 201220712375 patent/CN203039967U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103037585A (en) * | 2012-12-21 | 2013-04-10 | 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 |
| WO2014094648A1 (en) * | 2012-12-21 | 2014-06-26 | 深圳桑达百利电器有限公司 | Split led lamp and driving power supply insertion and extraction protection circuit thereof |
| 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 |
| CN103762859A (en) * | 2014-02-26 | 2014-04-30 | 杨华新 | Non-electrolytic isolated type syntonic switching power supply |
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Granted publication date: 20130703 Effective date of abandoning: 20141217 |
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