CN203618196U - Anti-surge circuit and integrated circuit comprising same - Google Patents
Anti-surge circuit and integrated circuit comprising same Download PDFInfo
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- CN203618196U CN203618196U CN201320860168.0U CN201320860168U CN203618196U CN 203618196 U CN203618196 U CN 203618196U CN 201320860168 U CN201320860168 U CN 201320860168U CN 203618196 U CN203618196 U CN 203618196U
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Abstract
The utility model discloses an anti-surge circuit and an integrated circuit comprising the same. The anti-surge circuit comprises a positive input end connected with a power supply anode, a negative input end connected with a power supply cathode, and a plurality of LED lamp strings which are connected in parallel between the positive input end and the negative input end; the anti-surge circuit further comprises an overvoltage impact protection circuit for preventing surge voltage and a first overcurrent impact protection circuit for preventing surge current; and the overvoltage impact protection circuit is connected with the LED lamp strings in parallel, and the overvoltage impact protection circuit is connected with the first overcurrent impact protection circuit in series after the overvoltage impact protection circuit is connected with the LED lamp strings in parallel. The overvoltage impact protection circuit and the first overcurrent impact protection circuit are directly arranged on an LED lamp panel, damage of LED lamps caused by the surge overvoltage and surge current is effectively prevented, a protective function for the LED lamp strings is effectively improved, service lives and reliability of the lamp strings are improved, and the failure rate is reduced.
Description
Technical field
The utility model relates to LED lamp plate protection field, the integrated circuit that relates in particular to a kind of anti-surge circuit and comprise this anti-surge circuit.
Background technology
The features such as LED light fixture has efficiently, reliable, low power consuming, have purposes very widely, be commonly used to make throw light on, the field such as demonstration, signal lamp, landscape light in city, room lighting and decoration.But due to the complexity of LED light fixture environment for use, especially when LED is while using out of doors, its LED light fixture is very easy to be subjected to the impact of overvoltage (ESD) and overcurrent (EOS) and causes fault or damage, cause unnecessary property loss or even casualties, produced the main cause of surge: when extraneous curtage exceedes the maximum specification condition of device, the performance of this device can weaken even to be damaged.
Overvoltage and over-current damage result from following several situation conventionally:
1, power supply (AC/DC) interference, power supply noise, surging and overvoltage.
2, because power drives is switched transient current/peak value/low-frequency disturbance that (hot-swap) causes.Its process duration may be several microseconds to several seconds (may be also several nanoseconds), the damage that very short EOS pulse causes and electrostatic discharge (ESD) damage similar.
3, lightning thunderbolt.
4, transient state/burr/short-time pulse waveform that mains switch causes disturbs.
While there is transient over-current event, the electric current of process LED is by the maximum rated current higher than in LED technical data sheet, and this may be that logical excessive current directly produces or indirectly produces by high voltage.These events are all transient states, when they occur in other words, only continue the extremely short time, conventionally can not exceed a second.Sometimes also they are called " sharp cutting edge of a knife or a sword " to for example " electric current point cutting edge of a knife or a sword " or " voltage point cutting edge of a knife or a sword ".If produce immediately overcurrent event at LED lamp plate in the time switching on power or insert the power supply (also referred to as " warm swap ") of energising, this overcurrent event is known as " surge current ".Any EOS and ESD may cause the performance of light fixture to reduce and damage above.
Tradition LED Design of Luminaires only considers the driver of light fixture once simply to protect, and corresponding LED lamp plate is not carried out to relevant secondary protection.Therefore caused life-span and the performance of LED light fixture to reduce, reliability reduces, and causes rate of breakdown higher.
Therefore, there is defect in prior art, needs to improve.
Utility model content
The technical problems to be solved in the utility model is, do not have carrying out surge protection function, performance reduction, life and reliability to reduce and the higher defect of rate of breakdown for the above-mentioned LED lamp plate of prior art, the integrated circuit that a kind of anti-surge circuit is provided and comprises this anti-surge circuit.
The utility model solves the technical scheme that its technical problem adopts: construct a kind of anti-surge circuit, for LED lamp plate, described anti-surge circuit comprises positive input terminal, the negative input end being connected with power cathode being connected with positive source and is connected to several LED lamp strings in parallel between described positive input terminal and negative input end, each described LED lamp string comprises at least one LED lamp, and described anti-surge circuit also comprises overvoltage impact protection circuit for preventing surge voltage and for preventing the first overcurrent impact protection circuit of surge current;
Described overvoltage impact protection circuit and the connection in series-parallel of each described LED lamp, and described overvoltage impact protection circuit with after the connection in series-parallel of described LED lamp, connect with described the first overcurrent impact protection circuit.
Anti-surge circuit described in the utility model, wherein, described anti-surge circuit also comprises a resettable fuse of connecting with described the first overcurrent impact protection circuit, described overvoltage impact protection circuit comprise for reducing direct impedance when the described positive input terminal output surge voltage so that between described positive input terminal and negative input end short circuit make described resettable fuse disconnect putting the piezo-resistance that only surge voltage enters described LED lamp string;
One end of described piezo-resistance is connected to described negative input end, and the other end of described piezo-resistance is connected to described positive input terminal after by described the first overcurrent impact protection circuit and resettable fuse.
Anti-surge circuit described in the utility model, wherein, described overvoltage impact protection circuit comprise for when the described positive input terminal output surge voltage by the voltage clamp at described LED lamp string two ends the Transient Voltage Suppressor on predetermined voltage;
The positive pole of described Transient Voltage Suppressor is connected to described negative input end, and the negative pole of described Transient Voltage Suppressor is connected to described positive input terminal after by described the first overcurrent impact protection circuit.
Anti-surge circuit described in the utility model, wherein, described the first overcurrent impact protection circuit comprises for improve self-resistance to protect described LED lamp string to avoid the resetted overcurrent protective device of the impact of surge current in the time that described positive input terminal is exported surge current;
One end of the described overcurrent protective device that resets is connected to described positive input terminal, and the other end of the described overcurrent protective device that resets is connected to respectively described LED lamp string and overvoltage impact protection circuit.
Anti-surge circuit described in the utility model, wherein, the described overcurrent protective device that resets is thermistor.
Anti-surge circuit described in the utility model; wherein; described anti-surge circuit also comprises several corresponding with described LED lamp string number the second overcurrent impact protection circuit for preventing that overcurrent from impacting, in parallel with described overvoltage impact protection circuit after described LED lamp string corresponding to each described the second overcurrent impact protection circuit series connection.
Anti-surge circuit described in the utility model; wherein; described the second overcurrent impact protection circuit comprises the current regulator diode for constant current is provided; the positive pole of each described current regulator diode is connected to described overvoltage impact protection circuit and the first overcurrent impact protection circuit respectively, and the negative pole of each described current regulator diode is connected to corresponding described LED lamp string.
Anti-surge circuit described in the utility model, wherein, described anti-surge circuit also comprise several be connected in parallel on corresponding each described LED lamp two ends, for conducting in the time that the described LED lamp of correspondence disconnects so that the fallback circuit of the corresponding normal work of LED lamp string.
Anti-surge circuit described in the utility model, wherein, described fallback circuit is the Zener diode that puncture voltage is greater than the forward voltage values of described LED lamp, the positive pole of described Zener diode is connected to the negative pole of corresponding described LED lamp, and the negative pole of described Zener diode is connected to the positive pole of corresponding described LED lamp.
The invention also discloses a kind of integrated circuit, comprise described anti-surge circuit.
The integrated circuit of implementing anti-surge circuit of the present utility model and comprising this anti-surge circuit; there is following beneficial effect: anti-surge circuit of the present utility model is directly provided with overvoltage impact protection circuit and the first overcurrent impact protection circuit on LED lamp plate; can effectively prevent the infringement that surge voltage and surge current cause LED lamp; effectively raise defencive function to LED lamp string, improved the life and reliability of lamp string, reduced rate of breakdown.The utility model also further arranges the second overcurrent impact protection circuit; the surge current that can further carry out each lamp string branch road protects; further; the utility model also arranges fallback circuit for each LED lamp; in the time that this LED lamp breaks down disconnection; fallback circuit conducting makes the LED lamp string at this LED lamp place keep normal work, has further increased the reliability of lamp string.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the theory diagram of the utility model anti-surge circuit;
Fig. 2 is the circuit theory diagrams of the utility model anti-surge circuit;
Fig. 3 is the design sketch that the first overcurrent impact protection circuit of the present utility model adopts the anti-current surge of NTC resistor.
Embodiment
The utility model does not have carrying out surge protection function, performance reduction, life and reliability to reduce and the higher defect of rate of breakdown in order to solve LED lamp plate, the integrated circuit that a kind of anti-surge circuit is provided and comprises this anti-surge circuit.
Anti-surge circuit of the present utility model; set up and the series-parallel overvoltage impact protection circuit of LED lamp; also set up the first overcurrent impact protection circuit of connecting with the parallel circuits of LED lamp string and the formation of overvoltage impact protection circuit; can effectively prevent infringement LED lamp being caused from surge voltage and the surge current of power supply; effectively raise defencive function to LED lamp string, improved the life and reliability of lamp string, reduced rate of breakdown.
Understand for technical characterictic of the present utility model, object and effect being had more clearly, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
If Fig. 1 is the theory diagram of the utility model anti-surge circuit; Fig. 2 is the circuit theory diagrams of the utility model anti-surge circuit.
Anti-surge circuit of the present utility model, for LED lamp plate, described anti-surge circuit comprises positive input terminal 20, the negative input end 30 being connected with power cathode being connected with positive source and is connected to several LED lamp strings 10 in parallel between described positive input terminal 20 and negative input end 30, each described LED lamp string 10 comprises at least one LED lamp D0, the positive pole of first LED lamp D0 in each LED lamp string 10 is connected to positive input terminal 20, LED lamp D0 in LED lamp string 10 connects successively, and the negative pole of last LED lamp D0 is connected to negative input end 30.
In order to prevent voltage surge and current surge, described anti-surge circuit of the present utility model comprises overvoltage impact protection circuit 1 for preventing surge voltage and for preventing the first overcurrent impact protection circuit 2 of surge current.Described overvoltage impact protection circuit 1 is in parallel with each described LED lamp string 10, and described overvoltage impact protection circuit 1 is connected with described the first overcurrent impact protection circuit 2 with after described LED lamp string 10 parallel connections.
In order further to prevent the surge current of each lamp string branch road; preferably; described anti-surge circuit also comprises several corresponding with described LED lamp string 10 numbers the second overcurrent impact protection circuit 3 for preventing that overcurrent from impacting, in parallel with described overvoltage impact protection circuit 1 after described LED lamp string 10 corresponding to each described the second overcurrent impact protection circuit 3 series connection.
Consider in LED lamp string 10, due to LED lamp D0 series connection, once certain LED lamp D0 breaks down and has disconnected, can cause so the whole LED lamp string 10 at this LED lamp D0 place to open circuit, affect the work of other normal LED lamp D0, therefore, anti-surge circuit described in the utility model also comprise several be connected in parallel on corresponding each described LED lamp D0 two ends, for conducting in the time that the described LED lamp D0 of correspondence disconnects so that the fallback circuit of corresponding LED lamp string 10 normal work.
The overvoltage event of LED lamp plate may often occur, and comprises that light fixture is in the time of assembling, test, installation and maintenance LED light fixture.Protection LED is not subject to the impact of these events, preferably, in LED lamp string array, with lamp connection in series-parallel, overvoltage impact protection circuit 1 is set.Wherein, described overvoltage impact protection circuit 1 can comprise piezo-resistance; now require also to comprise in circuit resettable fuse; resettable fuse is connected with described the first overcurrent impact protection circuit 2; one end of described piezo-resistance is connected to described negative input end 30, and the other end of described piezo-resistance is connected to described positive input terminal 20 after by described the first overcurrent impact protection circuit 2 and resettable fuse.
Piezo-resistance is in the time of rest; relatively shielded LED lamp string 10; there is very high impedance; and can not change design circuit characteristic; but when moment surge voltage appearance; while crossing the breakdown voltage of piezo-resistance; the impedance meeting step-down of this piezo-resistance; and cause the short circuit between positive input terminal 20 and negative input end 30; described resettable fuse is disconnected; path between positive input terminal 20 and negative input end 30 disconnects, thereby effectively prevents that overvoltage from entering LED lamp string 10, and in other words therefore LED lamp string 10 is protected.
Preferably; overvoltage impact protection circuit 1 adopt in the time that described positive input terminal 20 is exported surge voltage by the voltage clamp at described LED lamp string 10 two ends the Transient Voltage Suppressor D1 on predetermined voltage (TVS pipe); the positive pole of Transient Voltage Suppressor D1 is connected to negative input end 30, and the negative pole of described Transient Voltage Suppressor D1 is connected to described positive input terminal 20 after by described the first overcurrent impact protection circuit 2.
Under normal circumstances, TVS pipe works in reverse blocking state in circuit, and now it does not affect any function of circuit.In the time there is surge voltage, the high energy impact events of moment is stood at TVS pipe two ends, it can reduce its impedance with high speed (be up to 1*10-12 second) suddenly, absorb a large electric current simultaneously, by the voltage clamp between its two ends on a predetermined numerical value, thereby guarantee that LED lamp string below avoids the high-octane impact of transient state of surge voltage and damage.
TVS pipe comprises unidirectional TVS pipe and two-way TVS pipe, and two-way TVS can absorb instantaneous large pulse power at positive and negative both direction, and voltage clamping is arrived to predeterminated level.If when TVS pipe likely bears peaking voltage (surge voltage) impact from both direction, should select two-way TVS pipe, otherwise can select unidirectional TVS pipe.General alternating current circuit is suitable for two-way TVS pipe, and DC circuit is suitable for unidirectional TVS pipe.
Rigidly connect when logical when the LED lamp string 10 in LED lamp plate is connected to the power supply of energising or power supply, a kind of overcurrent situations of common form can occur.This situation is known as surge current.The protection of surge current can be used for improving self-resistance in the time that described positive input terminal 20 is exported surge current to protect described LED lamp string 10 to avoid the resetted overcurrent protective device of the impact of surge current by employing; one end of the described overcurrent protective device that resets is connected to described positive input terminal 20, and the other end of the described overcurrent protective device that resets is connected to respectively overvoltage impact protection circuit 1 and is connected to described LED lamp string 10 by the second overcurrent impact protection circuit 3.
Preferably; the described overcurrent protective device that resets is thermistor R1 (NTC resistor), and the other end that one end of described thermistor R1 is connected to described positive input terminal 20 thermistor R1 is connected to respectively the positive pole of first LED lamp D0 in each LED lamp string 10 and the negative pole of TVS pipe.
Adopt NTC resistor that passive surge current protection can be provided.Shown in figure 3, particularly, in the time of Power supply belt hot-line insertion and extraction or initial power-up, NTC resistor provides a high resistance to protect LED to avoid the damage of surge current, after device transit time, NTC resistor will switch on power, its resistance can be ignored, can not affect the work of other components and parts in circuit, the circuit neutralization that Fig. 3 has reacted connection NTC resistor does not connect in the circuit of NTC resistor, occur before surge to the variation of electric current in the time period occurring after surge, the rush of current of subsequent conditioning circuit when the visible NTC of utilization resistor can reduce surge greatly.
For the selection of NTC resistor, need first understand the maximum output voltage of power supply and LED lamp D0 exemplary voltages used under its running current.Use the difference of two voltages and the resistance of NTC resistor, can use formula below to calculate initial peak currents:
I
NTCpeak=(V
outputMAX–N*V
F)/R
NTC
Wherein I
nTCpeakfor peak current, it is generally far above normal electrical flow valuve, V
outputMAXfor power supply output maximum voltage value, N is the number of the LED lamp D0 in LED lamp string 10, V
ffor the forward voltage values of each LED lamp D0, R
nTCfor the resistance value of NTC resistor.
Although adopt the energy consumption of negative temperature coefficient NTC resistor will reduce the gross efficiency of LED light fixture, cause energy loss amount to depend on ambient temperature and drive current used by NTC resistor, this loss may be somewhat large, but be to connect with series connection form to many LED lamp plates, maximum mains voltage can far not exceed the LED lamp plate of the Maximum Forward Voltage of LED series connection, and adopting NTC resistor is a very good solution.
Wherein, described the second overcurrent impact protection circuit 3 comprises the current regulator diode D2 for constant current is provided; wherein; the positive pole of each described current regulator diode D2 is connected to described overvoltage impact protection circuit 1 and the first overcurrent impact protection circuit 2 respectively; and the positive pole of each described current regulator diode D2 is connected to one end of thermistor R1 and the negative pole of Transient Voltage Suppressor D1, the negative pole of each described current regulator diode D2 is connected to the positive pole of first LED lamp D0 in corresponding described LED lamp string 10.
Certainly, can suitably increase according to the required current value of every string in LED lamp string 10 quantity of current regulator diode D2 in parallel.Current regulator diode D2 exports constant electric current in wider voltage range, and has very high motional impedance.Because its constant current performance is good, easy to use, therefore utilize current regulator diode D2 can prevent at LED lamp plate the surge of crossing of surge voltage.
Wherein, described fallback circuit is the Zener diode D3 that puncture voltage is greater than the forward voltage values of described LED lamp D0, the positive pole of described Zener diode D3 is connected to the negative pole of corresponding described LED lamp D0, and the negative pole of described Zener diode D3 is connected to the positive pole of corresponding described LED lamp D0.
On each LED, a Zener diode D3 in parallel, also can select LED itself to have the encapsulation that carries Zener diode.Zener diode is a kind of until all have very high-resistance semiconductor device before critical reverse breakdown voltage. on this critical breakdown point, backward resistance is reduced to a little numerical value, in this low-resistance region, electric current increase voltage keeps constant, and the puncture voltage of this Zener diode must select to be slightly larger than the forward voltage values of this LED.So, if this LED lamp string 10 has LED lamp D0 to disconnect while not working, due in order to maintain constant current, can be by Zener diode D3 reverse breakdown, therefore, the LED lamp string 10 still conductings of whole string.And TVS pipe has limited overvoltage event, but still may cause LED lamp string to occur overcurrent situations.Because the forward voltage of LED lamp D0 all approaches representative value, add Zener diode and can further guarantee that the LED lamp D0 life-span is longer, safer more stable use.
Separately, in the formation Anti-surging scheme of the devices such as TVS pipe, Zener diode, negative temperature coefficient NTC resistor and the current regulator diode that the utility model uses, preferably all adopt surface-mounted device, easily settle, can allow and directly be placed on easily on LED lamp plate, abreast of the times aesthetic and energy-conserving and environment-protective demand.And greatly protect LED lamp plate and avoid being subjected to the impact of overvoltage and overcurrent and cause fault or damage, cause unnecessary property loss or even casualties.And this anti-surge circuit is with low cost, promote reliability and the actual life of the whole lamp of LED light fixture.
The utility model also provides one to comprise above-mentioned anti-surge circuit integrated circuit.
In sum; the anti-surge circuit of utility model and the integrated circuit that comprises this anti-surge circuit; on LED lamp plate, be directly provided with overvoltage impact protection circuit and the first overcurrent impact protection circuit; can effectively prevent the infringement that surge voltage and surge current cause LED lamp; effectively raise defencive function to LED lamp string, improved the life and reliability of lamp string, reduced rate of breakdown.The utility model also further arranges the second overcurrent impact protection circuit; the surge current that can further carry out each lamp string branch road protects; further; the utility model also arranges fallback circuit for each LED lamp; in the time that this LED lamp breaks down disconnection; fallback circuit conducting makes the LED lamp string at this LED lamp place keep normal work; further increase the reliability of lamp string; and the Zener diode that in the utility model, fallback circuit adopts, the further voltage stability of reinforcement LED lamp.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not departing from the scope situation that the utility model aim and claim protect, also can make a lot of forms, within these all belong to protection of the present utility model.
Claims (10)
1. an anti-surge circuit, for LED lamp plate, described anti-surge circuit comprises the positive input terminal (20) being connected with positive source, the negative input end (30) being connected with power cathode and be connected to described positive input terminal (20) and negative input end (30) between several LED lamp strings (10) in parallel, each described LED lamp string (10) comprises at least one LED lamp (D0), it is characterized in that, described anti-surge circuit also comprises overvoltage impact protection circuit (1) for preventing surge voltage and for preventing the first overcurrent impact protection circuit (2) of surge current,
Described overvoltage impact protection circuit (1) is in parallel with each described LED lamp string (10), and described overvoltage impact protection circuit (1) is connected with described the first overcurrent impact protection circuit (2) with after described LED lamp string (10) parallel connection.
2. anti-surge circuit according to claim 1, it is characterized in that, described anti-surge circuit also comprises a resettable fuse of connecting with described the first overcurrent impact protection circuit (2), described overvoltage impact protection circuit (1) comprise for reducing direct impedance when described positive input terminal (20) the output surge voltage so that between described positive input terminal (20) and negative input end (30) short circuit make described resettable fuse disconnect putting to stop the piezo-resistance that surge voltage enters described LED lamp string (10);
One end of described piezo-resistance is connected to described negative input end (30), and the other end of described piezo-resistance is connected to described positive input terminal (20) after by described the first overcurrent impact protection circuit (2) and resettable fuse.
3. anti-surge circuit according to claim 2, it is characterized in that, described overvoltage impact protection circuit (1) comprise for when described positive input terminal (20) the output surge voltage by the voltage clamp at described LED lamp string (10) two ends the Transient Voltage Suppressor (D1) on predetermined voltage;
The positive pole of described Transient Voltage Suppressor (D1) is connected to described negative input end (30), and the negative pole of described Transient Voltage Suppressor (D1) is connected to described positive input terminal (20) after by described the first overcurrent impact protection circuit (2).
4. anti-surge circuit according to claim 1, it is characterized in that, described the first overcurrent impact protection circuit (2) comprises for improve self-resistance to protect described LED lamp string (10) to avoid the resetted overcurrent protective device of the impact of surge current in the time that described positive input terminal (20) is exported surge current;
One end of the described overcurrent protective device that resets is connected to described positive input terminal (20), and the other end of the described overcurrent protective device that resets is connected to respectively described LED lamp string (10) and overvoltage impact protection circuit (1).
5. anti-surge circuit according to claim 4, is characterized in that, the described overcurrent protective device that resets is thermistor (R1).
6. anti-surge circuit according to claim 1; it is characterized in that; described anti-surge circuit also comprises several corresponding with described LED lamp string (10) number the second overcurrent impact protection circuit (3) for preventing that overcurrent from impacting, in parallel with described overvoltage impact protection circuit (1) after described LED lamp string (10) corresponding to each described the second overcurrent impact protection circuit (3) series connection.
7. anti-surge circuit according to claim 6; it is characterized in that; described the second overcurrent impact protection circuit (3) comprises the current regulator diode (D2) for constant current is provided; the positive pole of each described current regulator diode (D2) is connected to described overvoltage impact protection circuit (1) and the first overcurrent impact protection circuit (2) respectively, and the negative pole of each described current regulator diode (D2) is connected to corresponding described LED lamp string (10).
8. anti-surge circuit according to claim 1, it is characterized in that, described anti-surge circuit also comprise several be connected in parallel on corresponding each described LED lamp (D0) two ends, for conducting in the time that the described LED lamp (D0) of correspondence disconnects so that the fallback circuit of the corresponding normal work of LED lamp string (10).
9. anti-surge circuit according to claim 1, it is characterized in that, described fallback circuit is the Zener diode (D3) of the puncture voltage forward voltage values that is greater than described LED lamp (D0), the positive pole of described Zener diode (D3) is connected to the negative pole of corresponding described LED lamp (D0), and the negative pole of described Zener diode (D3) is connected to the positive pole of corresponding described LED lamp (D0).
10. an integrated circuit, is characterized in that, comprises the anti-surge circuit as described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860168.0U CN203618196U (en) | 2013-12-24 | 2013-12-24 | Anti-surge circuit and integrated circuit comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860168.0U CN203618196U (en) | 2013-12-24 | 2013-12-24 | Anti-surge circuit and integrated circuit comprising same |
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| CN203618196U true CN203618196U (en) | 2014-05-28 |
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| CN201320860168.0U Expired - Fee Related CN203618196U (en) | 2013-12-24 | 2013-12-24 | Anti-surge circuit and integrated circuit comprising same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735854A (en) * | 2013-12-24 | 2015-06-24 | 深圳市达特照明股份有限公司 | Anti-surge circuit and integrated circuit with same |
| CN109219183A (en) * | 2017-07-06 | 2019-01-15 | 深圳市海洋王照明工程有限公司 | A kind of nuclear power environment LED lamp device and its driving circuit |
| CN111446691A (en) * | 2019-01-17 | 2020-07-24 | 力智电子股份有限公司 | Transient voltage suppression element |
| CN113629987A (en) * | 2021-08-03 | 2021-11-09 | 深圳市康佳壹视界商业显示有限公司 | LED screen electrical control system |
-
2013
- 2013-12-24 CN CN201320860168.0U patent/CN203618196U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735854A (en) * | 2013-12-24 | 2015-06-24 | 深圳市达特照明股份有限公司 | Anti-surge circuit and integrated circuit with same |
| CN109219183A (en) * | 2017-07-06 | 2019-01-15 | 深圳市海洋王照明工程有限公司 | A kind of nuclear power environment LED lamp device and its driving circuit |
| CN109219183B (en) * | 2017-07-06 | 2021-08-13 | 深圳市海洋王照明工程有限公司 | Nuclear power environment LED lamp device and drive circuit thereof |
| CN111446691A (en) * | 2019-01-17 | 2020-07-24 | 力智电子股份有限公司 | Transient voltage suppression element |
| CN111446691B (en) * | 2019-01-17 | 2023-12-01 | 源芯半导体股份有限公司 | Transient voltage suppression element |
| CN113629987A (en) * | 2021-08-03 | 2021-11-09 | 深圳市康佳壹视界商业显示有限公司 | LED screen electrical control system |
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Address after: 518040 West, 3rd floor, block B1, building f5.8, Tianji building, Tian'an Digital City, chegongmiao, Futian District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Date Culture Technology Co.,Ltd. Address before: 518040 West, 3rd floor, block B1, building F58, Tianji building, Tian'an Digital City, chegongmiao, Futian District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN DART ILLUMINATION Co.,Ltd. |
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Granted publication date: 20140528 |