CN106714389A - LED (Light Emitting Diode) driving device and surge protection circuit and surge protection method of LED driving device - Google Patents
LED (Light Emitting Diode) driving device and surge protection circuit and surge protection method of LED driving device Download PDFInfo
- Publication number
- CN106714389A CN106714389A CN201710084182.9A CN201710084182A CN106714389A CN 106714389 A CN106714389 A CN 106714389A CN 201710084182 A CN201710084182 A CN 201710084182A CN 106714389 A CN106714389 A CN 106714389A
- Authority
- CN
- China
- Prior art keywords
- module
- surge
- semiconductor
- oxide
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/22—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage of short duration, e.g. lightning
-
- 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]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an LED (Light Emitting Diode) driving device and a surge protection circuit and a surge protection method of the LED driving device. The surge protection circuit of the LED driving device comprises a surge detection module, a control module and a constant-current driving module; voltage of the constant-current driving module is detected through the surge detection module; a corresponding control signal is output to the control module according to whether surge voltage is detected or not; the control module is used for controlling the constant-current driving module to be switched on or off according to the control signal, and controlling a working state of the constant-current driving module in real time according to whether input voltage has surge or not; the surge protection capability of a system is remarkably improved while the cost of a surge protection device of the system is not increased.
Description
Technical field
The present invention relates to technical field of LED illumination, more particularly to a kind of LED drive device and its surging protection circuit, wave
Gush means of defence.
Background technology
Surge is above the transient overvoltage of normal working voltage, and adverse effect is brought to electrical equipment, and traditional LED shines
Bright drive circuit, as shown in figure 1, the Surge handling capability to improve system, pressure-sensitive in one in parallel of the ac input end of rectifier bridge
Resistance MOV, it is necessary to the out of phase in alternating current is tested during surge test, generally there is 0 °, 90 °, 180 °,
270 ° of four phases, find that in 0 ° and 180 ° two phase system 9 ° and 270 ° two of surge voltage ratio can be born in test
Phase wants more than 1000V high.
However, in 0 ° and 180 ° of two phase tests, input line voltage is 0, and constant-current driven chip is in power down
State, the state that the high-voltage tube M11 of chip internal is off；In 90 ° and 270 ° of two phase tests, line voltage is input into
It is ceiling voltage, constant-current driven chip is in the state of work, and the high-voltage tube M11 of chip internal is in the state opened.With normal
That advises is applied to as a example by the 500V high-voltage MOS pipes of constant-current driven chip, and the ceiling voltage that can be born in off state is 550V,
But can be in 100V or so in the ceiling voltage that opening can bear.Due to the difference of both working conditions, cause 0 ° and
The result of surge test has larger difference, the Surge handling capability of system under surge test and 90 ° and 270 ° of phases under 180 ° of phases
Also there is larger uncertainty.
Thus prior art could be improved and improve.
The content of the invention
In view of above-mentioned the deficiencies in the prior art part, it is an object of the invention to provide a kind of LED drive device and its wave
Protection circuit, carrying out surge protection method are gushed, the work of surge real-time control constant-current driven module can be whether there is according to input voltage
State, in the case where system surge protective device cost is not increased, significantly improves the carrying out surge protection ability of system.
In order to achieve the above object, this invention takes following technical scheme：
A kind of surging protection circuit of LED drive device, it includes surge detection module, control module and constant-current driven module；
The voltage of constant-current driven module is detected by surge detection module, and according to whether detects the corresponding control letter of surge voltage output
Number to control module, control module controls being switched on or off for constant-current driven module according to the control signal.
In the surging protection circuit of described LED drive device, the surge detection module is when surge voltage is detected
The first control signal is exported, the second control signal is otherwise exported.
In the surging protection circuit of described LED drive device, the control module when the first control signal is received,
Control constant-current driven module shut-off；The control module when the second control signal is received, open by control constant-current driven module.
In the surging protection circuit of described LED drive device, the control module includes the first metal-oxide-semiconductor, described first
The grid connection surge detection module of metal-oxide-semiconductor, the drain electrode connection constant-current driven module of first metal-oxide-semiconductor, first metal-oxide-semiconductor
Source ground.
In the surging protection circuit of described LED drive device, the constant-current driven module includes that the first power supply, computing are put
Big device and high-voltage MOS pipe, the in-phase input end of the positive pole concatenation operation amplifier of first power supply, first power supply it is negative
Pole is grounded；The inverting input of the operational amplifier is connected the source electrode of high-voltage MOS pipe, is also grounded by first resistor, described
The output end of operational amplifier connects the drain electrode of the first metal-oxide-semiconductor and the grid of high-voltage MOS pipe；The drain electrode of the high-voltage MOS pipe connects
Connect surge detection module.
In the surging protection circuit of described LED drive device, the surge detection module includes the first electric capacity and second
Resistance, one end of first electric capacity connects the drain electrode of high-voltage MOS pipe, and the other end of the first described electric capacity connects a MOS
The grid of pipe, also by second resistance be grounded.
In the surging protection circuit of described LED drive device, the surge detection module includes the second metal-oxide-semiconductor and the 3rd
Resistance, one end of second metal-oxide-semiconductor connects the drain electrode of high-voltage MOS pipe, and the grid of second metal-oxide-semiconductor connects the second metal-oxide-semiconductor
Source electrode and the first metal-oxide-semiconductor grid, also by 3rd resistor be grounded.
In the surging protection circuit of described LED drive device, first metal-oxide-semiconductor, the second metal-oxide-semiconductor and high-voltage MOS pipe
It is N-channel MOS pipe.
A kind of carrying out surge protection method of LED drive device, it comprises the following steps：
A, the voltage that constant-current driven module is detected by surge detection module, and according to whether detect surge voltage output accordingly
Control signal is to control module；
B, control module control being switched on or off for constant-current driven module according to the control signal.
A kind of LED drive device, including fuse, piezo-resistance and the rectification mould for carrying out rectification to input AC electricity
Block, it also includes surging protection circuit as described above, the input connection alternating current of the rectification module, the rectification module
Output end by LED contact connect surging protection circuit；The piezo-resistance is in parallel with the input of rectification module, the guarantor
Dangerous silk is connected with the input of rectification module.
Compared to LED drive device and its surging protection circuit, carrying out surge protection method that prior art, the present invention are provided
In, the surging protection circuit of the LED drive device includes surge detection module, control module and constant-current driven module；By wave
The voltage that detection module detects constant-current driven module is gushed, and according to whether detecting surge voltage exports corresponding control signal extremely
Control module, control module controls being switched on or off for constant-current driven module according to the control signal, can be according to input voltage
With the presence or absence of the working condition of surge real-time control constant-current driven module, do not increasing the situation of system surge protective device cost
Under, significantly improve the carrying out surge protection ability of system.
Brief description of the drawings
Fig. 1 is the circuit diagram of LED illumination drive circuit in the prior art.
The schematic diagram of the LED drive device that Fig. 2 is provided for the present invention.
The circuit diagram of the surging protection circuit first embodiment of the LED drive device that Fig. 3 is provided for the present invention.
The circuit diagram of the surging protection circuit second embodiment of the LED drive device that Fig. 4 is provided for the present invention.
The flow chart of the carrying out surge protection method of the LED drive device that Fig. 5 is provided for the present invention.
Specific embodiment
In view of surge test is uncertain big in the prior art, it is impossible to the shortcomings of ensureing the Surge handling capability of system, this hair
Bright purpose is to provide a kind of LED drive device and its surging protection circuit, carrying out surge protection method, can be according to input voltage
The no working condition that there is surge real-time control constant-current driven module, is not increasing the situation of system surge protective device cost
Under, significantly improve the carrying out surge protection ability of system.
To make the purpose of the present invention, technical scheme and effect clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that specific embodiment described herein is only used to explain the present invention, it is not used to
Limit the present invention.
Fig. 2 is referred to, the LED drive device that the present invention is provided is including fuse F1, piezo-resistance Rv, for handing over input
Stream electricity carries out the rectification module 11 and surging protection circuit 12 of rectification, the input connection alternating current of the rectification module 11, institute
The output end for stating rectification module 11 connects surging protection circuit 12 by LED series winding；The piezo-resistance Rv and rectification module 11
Input it is in parallel, the fuse F1 connects with the input of rectification module 11, on the basis of prior art piezo-resistance Rv
On, set up the stability that surging protection circuit 12 is further ensured that the system when surge voltage is produced, there is provided its Surge handling capability.
In the present embodiment, the rectification module 11 is rectifier bridge.
Specifically, the surging protection circuit 12 includes surge detection module 10, control module 20 and constant-current driven module
30, the surge detection module 10 connects constant-current driven module 30, the surge detection module 10 and perseverance by control module 20
Stream drive module 30 is also connected with LED string, and LED string lower section, i.e. constant-current driven module 30 are detected by surge detection module 10
Voltage, according to whether detecting surge voltage exports corresponding control signal to control module 20, one is entered by control module 20
Walk and control constant-current driven module 30 being switched on or off according to the control signal, make the constant-current driven module 30 can according to whether having
Surge event adjusts its working condition, eliminates the difference of the working condition come due to phase different band in surge test, cause be
The unstable phenomenon of system Surge handling capability.
Preferably, the surge detection module 10 exports the first control signal when surge voltage is detected, and otherwise exports
Second control signal, such as when an instantaneous high pressure 500V is produced, LED string lower section voltage can be fast with rectified input voltage
Speed rises, and now surge detection module 10 exports the first control signal after detecting the instantaneous high pressure, instantaneous not detecting
Then keep exporting secondary signal during high pressure, first control signal and the second control signal can be that voltage signal or electric current are believed
Number.
Correspondingly, when the first control signal is received, control constant-current driven module 30 is turned off the control module 20；Institute
Control module 20 is stated when the second control signal is received, control constant-current driven module 30 is opened.I.e. control module 20 is according to wave
The control signal for gushing the output of detection module 10 controls the working condition of constant-current driven module 30, when there is surge event, control
The shut-off of constant-current driven module 30 improves its voltage carrying capacity, when in the absence of surge event, then controls constant-current driven module 30
Open, it is ensured that its normal work, the working condition of surge real-time control constant-current driven module 30 whether there is according to input voltage,
Do not increasing system surge protective device（Such as piezo-resistance Rv）In the case of cost, the carrying out surge protection energy of system is significantly improved
Power.
Specifically, the control module 20 includes the grid connection surge inspection of the first metal-oxide-semiconductor M1, the first metal-oxide-semiconductor M1
Survey module 10, the drain electrode connection constant-current driven module 30 of the first metal-oxide-semiconductor M1, the source ground of the first metal-oxide-semiconductor M1.Institute
Stating constant-current driven module 30 includes the first power supply U1, operational amplifier Q1 and high-voltage MOS pipe M0, the positive pole of the first power supply U1
The in-phase input end of concatenation operation amplifier Q1, the negative pole ground connection of the first power supply U1；The operational amplifier Q1's is anti-phase
The source electrode and ground of input connection high-voltage MOS pipe M0, the specific LED drive device also include the first electricity for current sample
Resistance R1, the inverting input of the operational amplifier Q1 is grounded by the first resistor R1, and the operational amplifier Q1's is defeated
Go out the drain electrode of the first metal-oxide-semiconductor M1 of end connection and the grid of high-voltage MOS pipe M0；The drain electrode connection surge inspection of the high-voltage MOS pipe M0
Survey module 10.
Control module 20 controls the signal of high-voltage MOS pipe M0 according to the output signal of surge detection module 10, works as wave
When gushing detection module 10 and detecting surge event and export the first control signal, the grid of high-voltage MOS pipe M0 pulls down to ground, now
High-voltage MOS pipe M0 is off state, and constant-current driven chip is in power-down state, by taking 500V high-voltage MOS pipes M0 as an example, in shut-off
The ceiling voltage that state can bear is 550V, it is ensured that the carrying out surge protection ability of system；And work as the output of surge detection module 10 the
During two control signals, the grid of high-voltage MOS pipe M0 is controlled by operational amplifier Q1, is now in normal operating conditions, is realized
The normal work of chip when without surge event.
Further, heretofore described surge detection module 10 provides two kinds of embodiments, as shown in figure 3, first implements
In example, the surge detection module 10 includes one end connection height of the first electric capacity C1 and second resistance R2, the first electric capacity C1
The drain electrode of pressure metal-oxide-semiconductor M0, the other end of the first described electric capacity C1 connects the grid of the first metal-oxide-semiconductor M1, also passes through second resistance
R2 is grounded.When surge event occurs, the quick changes in voltage below LED string synchronous can produce one on second resistance R2
Fast-changing voltage signal, and the grid of the first metal-oxide-semiconductor M1 level is connected to the top of second resistance R2, now the first metal-oxide-semiconductor M1 is opened
Open, high-voltage MOS pipe M0 pulled down to ground, high-voltage MOS pipe M0 is off state, it is to avoid system is due to work caused by surge voltage
Make abnormal.
As shown in figure 4, in second embodiment, the surge detection module 10 includes the second metal-oxide-semiconductor M2 and 3rd resistor R3,
One end of the second metal-oxide-semiconductor M2 connects the drain electrode of high-voltage MOS pipe M0, and the grid of the second metal-oxide-semiconductor M2 connects the second metal-oxide-semiconductor
The grid of the source electrode of M2 and the first metal-oxide-semiconductor M1, also it is grounded by 3rd resistor R3.Wherein the second metal-oxide-semiconductor M2 is high-voltage tube, its tool
There are gate-drain parasitic capacitances, the parasitic capacitance and 3rd resistor R3 collectively form surge detection module 10, and use the high-voltage tube can be with
By surge detect circuit, control circuit and continuous current be integrated into same chip, improve integrated level, reduce system into
This.When surge event occurs, the quick changes in voltage below lamp string synchronous can produce a quick change on 3rd resistor R3
Voltage signal, the grid level of the first metal-oxide-semiconductor M1 is connected to the top of 3rd resistor R3, and now the first metal-oxide-semiconductor M1 is opened, high pressure
Metal-oxide-semiconductor M0 pulled down to ground, and high-voltage MOS pipe M0 is off state, has equally reached the purpose of carrying out surge protection.
During specific implementation, the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2 and high-voltage MOS pipe M0 are N-channel MOS pipe.
Correspondingly, the present invention also provides a kind of carrying out surge protection method of LED drive device, as shown in figure 5, the LED drives
The carrying out surge protection method of dynamic device comprises the following steps：
S100, the voltage that constant-current driven module is detected by surge detection module, and according to whether detect surge voltage output phase
The control signal answered is to control module；
S200, control module control being switched on or off for constant-current driven module according to the control signal.
The present invention correspondingly provides a kind of surging protection circuit of LED drive device, due to anti-to the surge above
Protection circuit is described in detail, and no longer describes in detail herein.
In sum, it is described in the LED drive device and its surging protection circuit, carrying out surge protection method of present invention offer
The surging protection circuit of LED drive device includes surge detection module, control module and constant-current driven module；Mould is detected by surge
Block detects the voltage of constant-current driven module, and according to whether detecting surge voltage exports corresponding control signal to controlling mould
Whether block, control module controls being switched on or off for constant-current driven module according to the control signal, can be deposited according to input voltage
In the working condition of surge real-time control constant-current driven module, in the case where system surge protective device cost is not increased, show
Write the carrying out surge protection ability of raising system.
It is understood that for those of ordinary skills, can be with technology according to the present invention scheme and its hair
Bright design is subject to equivalent or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Shield scope.
Claims (10)
1. a kind of surging protection circuit of LED drive device, it is characterised in that including surge detection module, control module and perseverance
Stream drive module；The voltage of constant-current driven module is detected by surge detection module, and according to whether detects surge voltage output
Corresponding control signal to control module, control module controls unlatching or the pass of constant-current driven module according to the control signal
It is disconnected.
2. the surging protection circuit of LED drive device according to claim 1, it is characterised in that the surge detects mould
Block exports the first control signal when surge voltage is detected, and otherwise exports the second control signal.
3. the surging protection circuit of LED drive device according to claim 2, it is characterised in that the control module exists
When receiving the first control signal, control constant-current driven module shut-off；The control module when the second control signal is received,
Control constant-current driven module is opened.
4. the surging protection circuit of LED drive device according to claim 1, it is characterised in that the control module bag
The first metal-oxide-semiconductor is included, the grid connection surge detection module of first metal-oxide-semiconductor, the drain electrode connection constant current of first metal-oxide-semiconductor is driven
Dynamic model block, the source ground of first metal-oxide-semiconductor.
5. the surging protection circuit of LED drive device according to claim 4, it is characterised in that the constant current drives mould
Block include the first power supply, operational amplifier and high-voltage MOS pipe, the positive pole concatenation operation amplifier of first power supply it is same mutually defeated
Enter end, the negative pole ground connection of first power supply；The inverting input of the operational amplifier connects the source electrode of high-voltage MOS pipe, goes back
It is grounded by first resistor, the output end of the operational amplifier connects the drain electrode of the first metal-oxide-semiconductor and the grid of high-voltage MOS pipe；
The drain electrode connection surge detection module of the high-voltage MOS pipe.
6. the surging protection circuit of LED drive device according to claim 5, it is characterised in that the surge detects mould
Block includes the first electric capacity and second resistance, and one end of first electric capacity connects the drain electrode of high-voltage MOS pipe, the first described electric capacity
The other end connect the first metal-oxide-semiconductor grid, also by second resistance be grounded.
7. the surging protection circuit of LED drive device according to claim 5, it is characterised in that the surge detects mould
Block includes the second metal-oxide-semiconductor and 3rd resistor, and one end of second metal-oxide-semiconductor connects the drain electrode of high-voltage MOS pipe, the 2nd MOS
The grid of pipe is connected the source electrode of the second metal-oxide-semiconductor and the grid of the first metal-oxide-semiconductor, is also grounded by 3rd resistor.
8. the surging protection circuit of LED drive device according to claim 7, it is characterised in that first metal-oxide-semiconductor,
Second metal-oxide-semiconductor and high-voltage MOS pipe are N-channel MOS pipe.
9. a kind of carrying out surge protection method of LED drive device, it is characterised in that comprise the following steps：
A, the voltage that constant-current driven module is detected by surge detection module, and according to whether detect surge voltage output accordingly
Control signal is to control module；
B, control module control being switched on or off for constant-current driven module according to the control signal.
10. a kind of LED drive device, including fuse, piezo-resistance and the rectification mould for carrying out rectification to input AC electricity
Block, it is characterised in that also including the surging protection circuit as described in claim 1-8 any one, the rectification module it is defeated
Enter end connection alternating current, the output end of the rectification module is contacted by LED and connects surging protection circuit；The piezo-resistance with
The input of rectification module is in parallel, and the fuse is connected with the input of rectification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084182.9A CN106714389B (en) | 2017-02-16 | 2017-02-16 | A kind of LED drive device and its surging protection circuit, carrying out surge protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084182.9A CN106714389B (en) | 2017-02-16 | 2017-02-16 | A kind of LED drive device and its surging protection circuit, carrying out surge protection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106714389A true CN106714389A (en) | 2017-05-24 |
| CN106714389B CN106714389B (en) | 2019-05-21 |
Family
ID=58909247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710084182.9A Active CN106714389B (en) | 2017-02-16 | 2017-02-16 | A kind of LED drive device and its surging protection circuit, carrying out surge protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106714389B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301792A (en) * | 2018-12-05 | 2019-02-01 | 珠海格力电器股份有限公司 | protection circuit, circuit system, automation device, control method and device |
| CN112068633A (en) * | 2020-09-02 | 2020-12-11 | 北京市科通电子继电器总厂有限公司 | Surge current protection circuit and solid state relay |
| CN114301035A (en) * | 2021-12-31 | 2022-04-08 | 上海晶丰明源半导体股份有限公司 | Surge protection circuit, drive circuit, and surge protection method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577855A (en) * | 2003-07-24 | 2005-02-09 | 松下电器产业株式会社 | Semiconductor integrated circuit device |
| WO2010020898A1 (en) * | 2008-08-19 | 2010-02-25 | Nxp B.V. | A surge protection circuit |
| TW201242416A (en) * | 2011-04-11 | 2012-10-16 | Green Solution Tech Co Ltd | LED driving circuit and protecting circuit thereof |
| CN103152928A (en) * | 2013-02-20 | 2013-06-12 | 郑英贵 | Load overvoltage protection circuit and control method thereof |
| CN103260302A (en) * | 2013-01-14 | 2013-08-21 | 美芯晟科技（北京）有限公司 | LED driver with adjustable conduction time |
| CN203708551U (en) * | 2013-12-17 | 2014-07-09 | 四川新力光源股份有限公司 | LED alternating-current drive circuit |
| CN104218551A (en) * | 2013-05-30 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | Lamp surge protection circuit and lamp |
| CN105811517A (en) * | 2010-03-26 | 2016-07-27 | 半导体元件工业有限责任公司 | Semiconductor integrated circuit |
| CN107004638A (en) * | 2014-12-05 | 2017-08-01 | 索尼半导体解决方案公司 | Semiconductor integrated circuit |
| CN206472347U (en) * | 2017-02-16 | 2017-09-05 | 深圳市晟碟半导体有限公司 | A kind of LED drive device and its surging protection circuit |
-
2017
- 2017-02-16 CN CN201710084182.9A patent/CN106714389B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577855A (en) * | 2003-07-24 | 2005-02-09 | 松下电器产业株式会社 | Semiconductor integrated circuit device |
| WO2010020898A1 (en) * | 2008-08-19 | 2010-02-25 | Nxp B.V. | A surge protection circuit |
| CN102132627A (en) * | 2008-08-19 | 2011-07-20 | Nxp股份有限公司 | A surge protection circuit |
| CN105811517A (en) * | 2010-03-26 | 2016-07-27 | 半导体元件工业有限责任公司 | Semiconductor integrated circuit |
| TW201242416A (en) * | 2011-04-11 | 2012-10-16 | Green Solution Tech Co Ltd | LED driving circuit and protecting circuit thereof |
| CN103260302A (en) * | 2013-01-14 | 2013-08-21 | 美芯晟科技（北京）有限公司 | LED driver with adjustable conduction time |
| CN103152928A (en) * | 2013-02-20 | 2013-06-12 | 郑英贵 | Load overvoltage protection circuit and control method thereof |
| CN104218551A (en) * | 2013-05-30 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | Lamp surge protection circuit and lamp |
| CN203708551U (en) * | 2013-12-17 | 2014-07-09 | 四川新力光源股份有限公司 | LED alternating-current drive circuit |
| CN107004638A (en) * | 2014-12-05 | 2017-08-01 | 索尼半导体解决方案公司 | Semiconductor integrated circuit |
| CN206472347U (en) * | 2017-02-16 | 2017-09-05 | 深圳市晟碟半导体有限公司 | A kind of LED drive device and its surging protection circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301792A (en) * | 2018-12-05 | 2019-02-01 | 珠海格力电器股份有限公司 | protection circuit, circuit system, automation device, control method and device |
| CN112068633A (en) * | 2020-09-02 | 2020-12-11 | 北京市科通电子继电器总厂有限公司 | Surge current protection circuit and solid state relay |
| CN112068633B (en) * | 2020-09-02 | 2022-02-01 | 北京市科通电子继电器总厂有限公司 | Surge current protection circuit and solid state relay |
| CN114301035A (en) * | 2021-12-31 | 2022-04-08 | 上海晶丰明源半导体股份有限公司 | Surge protection circuit, drive circuit, and surge protection method |
| CN114301035B (en) * | 2021-12-31 | 2024-03-22 | 上海晶丰明源半导体股份有限公司 | Surge protection circuit, driving circuit and surge protection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106714389B (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208174243U (en) | A kind of leakage protection circuit | |
| CN103956708B (en) | Low-voltage direct load overload telemetry circuit | |
| CN106714389A (en) | LED (Light Emitting Diode) driving device and surge protection circuit and surge protection method of LED driving device | |
| CN205584024U (en) | Switching power supply circuit with over-temperature protection | |
| CN104865513B (en) | A kind of surge electric current test circuit for carrying detection function | |
| CN206321697U (en) | Overvoltage detection circuit and switching power supply circuit | |
| CN203368336U (en) | Frequency converter | |
| CN206472347U (en) | A kind of LED drive device and its surging protection circuit | |
| CN106655750A (en) | Pre-charging apparatus used for voltage source converter and with line fault detection function | |
| CN206673559U (en) | A kind of phase shortage monitoring and protecting circuit | |
| CN203838232U (en) | High-voltage electroscope circuit capable of self-checking | |
| CN102998620B (en) | Device and method for quick online fault detection of high voltage thyristor valve block | |
| CN107425811A (en) | The monitoring device and photovoltaic generating system of photovoltaic resistor | |
| CN106501691A (en) | Portable high-pressure transducer power unit comprehensive detection device | |
| CN104218624B (en) | Lithium battery charging circuit and light fixture | |
| CN104411035B (en) | A kind of LED drive circuit powered without assists winding | |
| CN206450743U (en) | A kind of electric power system high voltage testing device | |
| CN207269145U (en) | A kind of protection circuit against input over-voltage for Switching Power Supply | |
| CN203587756U (en) | Silicon controlled rectifier on-line detection device | |
| CN206931988U (en) | High reliability under-voltage protecting circuit and power supply | |
| CN208062871U (en) | A kind of charger charging circuit | |
| CN206211600U (en) | Charging indication and charging device | |
| CN209432886U (en) | A kind of current detection circuit and current detecting system based on BUCK circuit | |
| CN203929854U (en) | Voltage magnitude testing circuit | |
| CN203929900U (en) | Simple and easy three-phase power supply phase sequence indicator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |