CN102625543A - Light-emitting diode (LED) power supply - Google Patents
Light-emitting diode (LED) power supply Download PDFInfo
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- CN102625543A CN102625543A CN201210107976XA CN201210107976A CN102625543A CN 102625543 A CN102625543 A CN 102625543A CN 201210107976X A CN201210107976X A CN 201210107976XA CN 201210107976 A CN201210107976 A CN 201210107976A CN 102625543 A CN102625543 A CN 102625543A
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Abstract
The invention discloses a light-emitting diode (LED) power supply, which comprises an electromagnetic interference (EMI) filter, a rectifier, a passive power-factor correction module, a controlling module and a constant current compensation module, wherein the EMI filter is connected with an outer mains supply and used for reducing electromagnetic interference of the LED power supply; the rectifier is connected with the EMI filter and used for rectifying electrical current input by the outer mains supply; the passive power-factor correction module is connected with the rectifier and used for improving power-factors of the LED power supply; and the controlling module is connected with the passive power-factor correction module and used for driving a LED light bead which is arranged at a load end of the LED power supply to work; and the constant current compensation module is connected with the controlling module and used for providing constant current voltage regulation power supply compensation for the controlling module. The LED power supply has the advantages of being high in current output precision and LED power supply efficiency and wide in applicable voltage range, so that the LED power supply and the LED light bead can work under a stable constant current condition, and service life is prolonged.
Description
Technical field
The present invention relates to field of power supplies, relate in particular to a kind of LED power supply.
Background technology
The advantage that light-emitting diode (LED, Light Emitting Diode) is used in lighting field has been well-known.Because the inherent characteristics of LED; Using the constant-current driving scheme almost is best selection, can protect LED can even not burn because of the excessive LED of the influence life-span of electric current on the one hand, on the other hand because need not seal in " current-limiting resistance "; Can reduce meaningless consumption widely, improve service efficiency.
Problems such as exist the output current precision low in the existing LED power supply, the LED power-efficient is low, and the voltage range that the LED power supply is suitable for is narrow, the influence that the problems referred to above are direct or indirect job stability and the useful life of LED power supply and LED lamp pearl.
Summary of the invention
Embodiment of the invention technical problem to be solved is; A kind of LED power supply is provided; It has higher output current precision and LED power-efficient; Advantages the such as simultaneously voltage range that is suitable for of LED power supply is wide can guarantee that LED power supply and LED lamp pearl work under a more stable constant current conditions, increase the service life.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of LED power supply, comprising:
Be connected with outside mains supply, be used for reducing the electromagnetic interference electromagnetic interface filter of said LED power supply electromagnetic interference; Be connected with said electromagnetic interface filter, be used for the rectifier that the electric current that said outside mains supply is imported is carried out rectification; Be connected with said rectifier, be used to improve the power factor correction module for no reason at all of said LED electrical source power factor;
Is connected with said for no reason at all power factor correction module, is used to drive the control module that the LED lamp pearl of said LED power source loads end is worked; Be connected with said control module, be used to the constant current compensating module that control module provides the constant current regulated power supply compensation.
Wherein, be provided with between said electromagnetic interface filter and the outside mains supply and be used to prevent that said LED power supply from suffering the piezo-resistance of surge and thunderbolt (VZ1); Said piezo-resistance (VZ1) cross-over connection is in the input of said outside mains supply.
Wherein, said electromagnetic interface filter is made up of common mode inductance (LC1) and X electric capacity; The one X electric capacity (CX1) and the primary coil two ends that are connected across common mode inductance (LC1) after first inductance (LD1) is connected; The 2nd X electric capacity (CX2) is connected across the secondary coil two ends of common mode inductance (LC1).
Wherein, the DC break down voltage value of said X electric capacity is more than 2000V, and said common mode inductance is 10mH ~ 30mH.
Wherein, said rectifier is full-bridge rectifier (BD1), and it has at least 1.5 times safe clearance coefficient.
Wherein, said power factor correction module for no reason at all is a balancing half-bridge compensation circuit, is made up of an arm of half-bridge first electric capacity (CE1) and the 4th diode (D4); Second electric capacity (CE2) and second diode (D2) are formed another arm of half-bridge; The 3rd diode (D3) and the tenth electric capacity (R10) are formed the charging connecting path.
Wherein, said control module is made up of first metal-oxide-semiconductor (Q1), the 6th diode (D6), first resistance (Rg), second resistance (Rt), the 3rd resistance (RS1), the 4th resistance (RS2) and chip BP2808;
Wherein, the 6th diode (D6) is connected with the pin VDD of chip BP2808 with first resistance (Rg) parallel connection back, one end, and the other end is connected with the grid of first metal-oxide-semiconductor (Q1); The source electrode of said first metal-oxide-semiconductor (Q1) is connected with the pin OUT of chip BP2808; Said second resistance (Rt) end is connected other end ground connection with the pin RT of chip BP2808; Said the 3rd resistance (RS1) and the 4th resistance (RS2) parallel connection, an end is connected other end ground connection with the pin CS of chip BP2808.
Wherein, said constant current compensating module comprises:
Be used for the 5th resistance (R15) and the 6th resistance (R16) the starting resistance step-down, series connection;
Be used to carry out the 7th resistance (R17) and the 3rd electric capacity (C3) of silver cabinet compensation; And
After the circuit voltage stabilizing, give the 5th diode (DZ1), the 4th electric capacity (C4) and the 8th resistance (R18) of the control circuit power supply among the chip BP2808; Said the 5th diode (DZ1), the 4th electric capacity (C4) and the 8th resistance (R18) parallel connection.
Wherein, said LED power supply also comprises: be used for the electric current on first metal-oxide-semiconductor (Q1) restricted passage load end LED lamp pearl when turning on, at first metal-oxide-semiconductor (Q1) the energy storage power inductance (LM1) of operating current be provided to load end LED lamp pearl when closing; Said energy storage power inductance (LM1) is connected with the drain electrode of first metal-oxide-semiconductor (Q1).
The LED power supply that the embodiment of the invention provided; It has higher output current precision and LED power-efficient; Advantages the such as simultaneously voltage range that is suitable for of LED power supply is wide can guarantee that LED power supply and LED lamp pearl work under a more stable constant current conditions, increase the service life.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The LED power supply first example structure sketch map that Fig. 1 provides for invention;
The LED power supply second example structure sketch map that Fig. 2 provides for invention.
Embodiment
The LED power supply that the embodiment of the invention provided; It has higher output current precision and LED power-efficient; Advantages the such as simultaneously voltage range that is suitable for of LED power supply is wide can guarantee that LED power supply and LED lamp pearl work under a more stable constant current conditions, increase the service life.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to Fig. 1; The LED power supply first example structure sketch map that provides for invention; As shown in Figure 1; This LED power supply comprises: electromagnetic interference (EMI, Electro Magnetic Interference) filter 1, rectifier 2, power factor correction module 3, control module 4 and constant current compensating module 5 for no reason at all.
Electromagnetic interface filter 1 is connected with outside mains supply, is used for reducing said LED power supply electromagnetic interference.
More concrete, electromagnetic compatibility (EMC, Electro Magnetic Compatibility) is meant that the operation that in its electromagnetic environment, meets the requirements of equipment or LED power supply does not produce the ability of intolerable electromagnetic interference to any equipment in its environment.Therefore, EMC comprises the requirement of two aspects: the equipment that is meant on the one hand can not surpass certain limit value to the electromagnetic interference EMI that the place environment produces in normal course of operation; Be meant that on the other hand utensil has immunity to interference to a certain degree to the electromagnetic interference that exists in the environment of place, i.e. electromagnetic susceptibility (EMS, Electro Magnetic susceptibility).Because (the speed-sensitive switch action of MOS power switch pipe will inevitably cause serious EMI for MOS, Metal-Oxide-Semiconductor) power switch pipe to have field effect in the circuit of LED power supply.
In order effectively to suppress and to reduce EMI, need generally externally that the mains supply input increases the filter of being made up of common mode inductance, X electric capacity and Y electric capacity, increased the anti-EMI effect of whole power supply, rate is removed conducted interference signal and radiated noise.And in LED power supply provided by the invention, adopt common mode inductance to add the compact way of X electric capacity, can further reduce cost the compression power volume.
Rectifier 2 said electromagnetic interface filters 1 connect, and are used for the rectifier that the electric current that said outside mains supply is imported is carried out rectification.More concrete, in embodiments of the present invention, said rectifier 2 adopts full-bridge rectifier BD1, mainly carries out the AC/DC conversion, therefore need give the safe clearance of 1.5 coefficients, more than the preferred 1000V/1A specification.
Power factor correction module 3 is connected with said rectifier 2 for no reason at all, is used to improve said LED electrical source power factor.More concrete; Because pulse direct current during the electric current of exporting after the general bridge rectifier rectification; Electric current is discontinuous, harmonic distortion is big, power factor is low; Therefore need to increase cheaply power factor correction module 3 for no reason at all, in the present embodiment, power factor correction module 3 can be selected balancing half-bridge compensation circuit for use for no reason at all.
Control module 4 is connected with said power factor correction module 3 for no reason at all, is used to drive LED lamp pearl 8 work of said LED power source loads end.
Constant current compensating module 5 said control modules 4 connect, and be used to control module 4 the constant current regulated power supply compensation is provided.
Preferably, be provided with between said electromagnetic interface filter 1 and the outside mains supply and be used to prevent that said LED power supply from suffering the piezo-resistance 6 of surge and thunderbolt; Said piezo-resistance 6 cross-over connections are in the input of said outside mains supply.
The LED power supply that the embodiment of the invention provided; It has higher output current precision and LED power-efficient; Advantages the such as simultaneously voltage range that is suitable for of LED power supply is wide can guarantee that LED power supply and LED lamp pearl work under a more stable constant current conditions, increase the service life.
Referring to Fig. 2, be the LED power supply second example structure sketch map that invention provides, as shown in the figure, this LED power supply comprises: electromagnetic interface filter, rectifier, power factor correction module, control module 4, constant current compensating module and piezo-resistance for no reason at all.
Electromagnetic interface filter is connected with outside mains supply, is used for reducing said LED power supply electromagnetic interference.More concrete, said electromagnetic interface filter is made up of common mode inductance LC1 and X electric capacity; The one X capacitor C X1 and the primary coil two ends that are connected across common mode inductance LC1 after the first inductance L D1 connects; The 2nd X capacitor C X2 is connected across the secondary coil two ends of common mode inductance LC1.The DC break down voltage value of said X electric capacity is more than 2000V, and said common mode inductance is 10mH ~ 30mH.For reduced volume and raising filter effect, the product that preferred high permeability micro crystal material magnetic core is made, inductance value should be selected bigger value as far as possible.
Piezo-resistance VZ1 is located between electromagnetic interface filter and the outside mains supply, is used to prevent that said LED power supply from suffering surge and thunderbolt, and said piezo-resistance VZ1 cross-over connection is in the input of said outside mains supply.
The said electromagnetic interface filter of rectifier connects, and is used for the rectifier that the electric current that said outside mains supply is imported is carried out rectification.More concrete, in embodiments of the present invention, said rectifier adopts full-bridge rectifier BD1, mainly carries out the AC/DC conversion, therefore need give the safe clearance of 1.5 coefficients, more than the preferred 1000V/1A specification.
Power factor correction module is connected with said rectifier for no reason at all, is used to improve said LED electrical source power factor.In the present embodiment, power factor correction module is a balancing half-bridge compensation circuit for no reason at all, is made up of an arm of half-bridge the first capacitor C E1 and the 4th diode D4; The second capacitor C E2 and the second diode D2 form another arm of half-bridge; The 3rd diode D3 and the tenth electric capacity R10 form the charging connecting path, and utilization is filled out the paddy principle and compensated.The first capacitor C E1 and second capacitor C E2 series connection; The highest the half the of input voltage that be charged to of voltage on the electric capacity; In case line drop arrives below half of input voltage; The second diode D2 and the 4th diode D4 will be made the first capacitor C E1 and the second capacitor C E2 begin parallel discharge by forward bias like this.So, the angle of flow of positive half period input current is from 75 <sup original >.</sup>~105<sup >。</sup>Rise to 30<sup ></sup>~150<sup >。</sup>The angle of flow of negative half-cycle input current is from original 255<sup ></sup>~285<sup >。</sup>Rise to 210<sup ></sup>~330<sup >。</sup>。The tenth electric capacity R10 that connects with the 3rd diode D3 helps level and smooth input current spike, can also improve power factor through the electric current of the restriction inflow first capacitor C E1 and the second capacitor C E2.
After the power factor correction module for no reason at all that the employing embodiment of the invention provides, the power factor of LED power-supply system brings up to 0.89 ~ 0.90 from 0.6.Preferably, the first capacitor C E1 in the present embodiment and the second capacitor C E2 select the electrochemical capacitor of 105 ℃ of two 22Uf/250V for use.
Control module is connected with said power factor correction module for no reason at all, is used to drive the LED lamp pearl work of said LED power source loads end.More concrete, this control module is made up of the first metal-oxide-semiconductor Q1, the 6th diode D6, the first resistance R g, the second resistance R t, the 3rd resistance R S1, the 4th resistance R S2 and chip BP2808.Wherein, an end is connected with the pin VDD of chip BP2808 after the 6th diode D6 and the first resistance R g parallel connection, and the other end is connected with the grid of the first metal-oxide-semiconductor Q1; The source electrode of the said first metal-oxide-semiconductor Q1 is connected with the pin OUT of chip BP2808; The said second resistance R t, one end is connected other end ground connection with the pin RT of chip BP2808; Said the 3rd resistance R S1 and the 4th resistance R S2 parallel connection, an end is connected other end ground connection with the pin CS of chip BP2808.
Can be known that by said structure control module is actual to be the source pole driving mode that adopts, this mode reduces the required electric current of LED power supply, has especially reduced the electric current on the similar R15-17 in traditional High Pressure Difference supply access, thereby has reduced power, has improved efficient.The 6th diode D6 and the first resistance R g can make switch open the driving deliquescing, turn-off to drive to keep stronger, thereby have both improved EMI, do not sacrifice efficient again.The output filter capacitor C0 parallelly connected with LED lamp pearl is used to reduce the current ripples on the LED lamp pearl.
The pin CS of chip BP2808 gathers the peak current on the 3rd resistance R S1 and the 4th resistance R S2; By the pulse duty factor of internal logic in monocycle inner control OUT leg signal; Thereby carry out constant current control, the freewheeling circuit of output constant current and diode D5, energy storage power inductance LM1 merges supplies power to LED lamp pearl.When the array combination of LED lamp pearl changed, the resistance value of the 3rd resistance R S1 and the 4th resistance R S2 also needed to change thereupon, makes the output current of entire circuit satisfy the job requirement of LED lamp pearl.
The said control module of constant current compensating module connects, and is used to control module the constant current regulated power supply compensation is provided.More concrete, said constant current compensating module comprises: be used for the 5th resistance R 15 and the 6th resistance R 16 the starting resistance step-down, series connection; Be used to carry out the 7th resistance R 17 and the 3rd capacitor C 3 of silver cabinet compensation; And the 5th diode DZ1, the 4th capacitor C 4 and the 8th resistance R 18 of after the circuit voltage stabilizing, giving the control circuit power supply among the chip BP2808; Said the 5th diode DZ1, the 4th capacitor C 4 and 18 parallel connections of the 8th resistance R.
In practical work process; Chip BP2808 is by the 5th resistance R 15 and the 16 starting resistance step-downs of the 6th resistance R; Through the 7th resistance R 17 and the 3rd capacitor C 3 feedforward compensations; And supply power for chip BP2808 control circuit after the constant current compensating circuit voltage stabilizing of forming by the 5th diode DZ1, the 4th capacitor C 4, the 8th resistance R 18 and chip BP2808 internal circuit; Because the quiescent current of control circuit own is little, and chip internal exists the feedback stream diode from pin OUT to pin VCC working power to be provided to chip BP2808 behind the LED power initiation, and the electric current that pass through on the resistance R 15-17 this moment will reduce greatly; Thereby the also reduction greatly of total LED power supply power consumption, the LED power-efficient is significantly improved.
Simultaneously; The LED power supply that present embodiment provides also comprises: energy storage power inductance LM1; Energy storage power inductance LM1 is connected with the drain electrode of the first metal-oxide-semiconductor Q1; The electric current that is used for restricted passage load end LED lamp pearl when the first metal-oxide-semiconductor Q1 turns on provides the energy storage power inductance LM1 of operating current to load end LED lamp pearl when the first metal-oxide-semiconductor Q1 closes.Energy storage power inductance LM1 requires Q value height, saturation current is big, resistance is little.In the present embodiment, the inductance of preferred nominal 2.6mH, the Q value should be greater than 90 in 40KHz ~ 100KHz frequency range.
The LED power supply that the embodiment of the invention provided; It has higher output current precision and LED power-efficient; Advantages the such as simultaneously voltage range that is suitable for of LED power supply is wide can guarantee that LED power supply and LED lamp pearl work under a more stable constant current conditions, increase the service life.
It should be noted that; What the present invention described is a kind of product form of LED power supply; Other satisfies constructed products according to the invention, and not influence the factor of product performance inequality even material, device name, outward appearance, device are put sequential scheduling, still belongs to the scope of the present invention's protection.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (9)
1. a LED power supply is characterized in that, comprising:
Be connected with outside mains supply, be used for reducing the electromagnetic interference electromagnetic interface filter of said LED power supply electromagnetic interference; Be connected with said electromagnetic interface filter, be used for the rectifier that the electric current that said outside mains supply is imported is carried out rectification; Be connected with said rectifier, be used to improve the power factor correction module for no reason at all of said LED electrical source power factor;
Is connected with said for no reason at all power factor correction module, is used to drive the control module that the LED lamp pearl of said LED power source loads end is worked; Be connected with said control module, be used to the constant current compensating module that control module provides the constant current regulated power supply compensation.
2. LED power supply as claimed in claim 1 is characterized in that, is provided with between said electromagnetic interface filter and the outside mains supply to be used to prevent that said LED power supply from suffering the piezo-resistance of surge and thunderbolt (VZ1); Said piezo-resistance (VZ1) cross-over connection is in the input of said outside mains supply.
3. LED power supply as claimed in claim 1 is characterized in that, said electromagnetic interface filter is made up of common mode inductance (LC1) and X electric capacity; The one X electric capacity (CX1) and the primary coil two ends that are connected across common mode inductance (LC1) after first inductance (LD1) is connected; The 2nd X electric capacity (CX2) is connected across the secondary coil two ends of common mode inductance (LC1).
4. LED power supply as claimed in claim 3 is characterized in that, the DC break down voltage value of said X electric capacity is more than 2000V, and said common mode inductance is 10mH ~ 30mH.
5. LED power supply as claimed in claim 1 is characterized in that, said rectifier is full-bridge rectifier (BD1), and it has at least 1.5 times safe clearance coefficient.
6. LED power supply as claimed in claim 1 is characterized in that, said power factor correction module for no reason at all is a balancing half-bridge compensation circuit, is made up of an arm of half-bridge first electric capacity (CE1) and the 4th diode (D4); Second electric capacity (CE2) and second diode (D2) are formed another arm of half-bridge; The 3rd diode (D3) and the tenth electric capacity (R10) are formed the charging connecting path.
7. LED power supply as claimed in claim 1; It is characterized in that said control module is made up of first metal-oxide-semiconductor (Q1), the 6th diode (D6), first resistance (Rg), second resistance (Rt), the 3rd resistance (RS1), the 4th resistance (RS2) and chip BP2808;
Wherein, the 6th diode (D6) is connected with the pin VDD of chip BP2808 with first resistance (Rg) parallel connection back, one end, and the other end is connected with the grid of first metal-oxide-semiconductor (Q1); The source electrode of said first metal-oxide-semiconductor (Q1) is connected with the pin OUT of chip BP2808; Said second resistance (Rt) end is connected other end ground connection with the pin RT of chip BP2808; Said the 3rd resistance (RS1) and the 4th resistance (RS2) parallel connection, an end is connected other end ground connection with the pin CS of chip BP2808.
8. LED power supply as claimed in claim 1 is characterized in that, said constant current compensating module comprises:
Be used for the 5th resistance (R15) and the 6th resistance (R16) the starting resistance step-down, series connection;
Be used to carry out the 7th resistance (R17) and the 3rd electric capacity (C3) of silver cabinet compensation; And
After the circuit voltage stabilizing, give the 5th diode (DZ1), the 4th electric capacity (C4) and the 8th resistance (R18) of the control circuit power supply among the chip BP2808; Said the 5th diode (DZ1), the 4th electric capacity (C4) and the 8th resistance (R18) parallel connection.
9. LED power supply as claimed in claim 7 is characterized in that, said LED power supply also comprises:
Be used for electric current, the energy storage power inductance (LM1) of operating current be provided when closing to load end LED lamp pearl at first metal-oxide-semiconductor (Q1) on first metal-oxide-semiconductor (Q1) restricted passage load end LED lamp pearl when turning on;
Said energy storage power inductance (LM1) is connected with the drain electrode of first metal-oxide-semiconductor (Q1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210107976XA CN102625543A (en) | 2012-04-13 | 2012-04-13 | Light-emitting diode (LED) power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210107976XA CN102625543A (en) | 2012-04-13 | 2012-04-13 | Light-emitting diode (LED) power supply |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795025A (en) * | 2014-01-23 | 2014-05-14 | 重庆四联光电科技有限公司 | Anti-lightning overvoltage protecting circuit |
| CN109296995A (en) * | 2018-11-02 | 2019-02-01 | 华域视觉科技(上海)有限公司 | LED lamp mould group and LED light source driving circuit |
| WO2019179007A1 (en) * | 2018-03-23 | 2019-09-26 | 深圳市电明科技股份有限公司 | Led lighting device |
| CN110515013A (en) * | 2019-07-25 | 2019-11-29 | 广东浪潮大数据研究有限公司 | A kind of dielectric strength test method, system and server power supply |
| CN111479354A (en) * | 2019-01-04 | 2020-07-31 | 一统光电（江苏）有限公司 | Interference-free low-cost long-life L ED power supply directly using mains supply and L ED lighting appliance thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100910198B1 (en) * | 2008-03-24 | 2009-07-30 | (주)유니온전자통신 | Smps suppling regular current for led-light |
| CN102026448A (en) * | 2010-11-01 | 2011-04-20 | 王子能 | LED power circuit |
| CN202017899U (en) * | 2010-11-10 | 2011-10-26 | 深圳市丰泰晶电子科技有限公司 | High-efficiency ultra-low interference light-emitting diode (LED) energy-saving lamp |
| CN202077247U (en) * | 2011-06-20 | 2011-12-14 | 江阴职业技术学院 | Illumination drive power supply for Light-emitting diode (LED) streetlamp |
| CN202551447U (en) * | 2012-04-13 | 2012-11-21 | 汕头市南帆电器有限公司 | LED (light-emitting diode) power supply |
-
2012
- 2012-04-13 CN CN201210107976XA patent/CN102625543A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100910198B1 (en) * | 2008-03-24 | 2009-07-30 | (주)유니온전자통신 | Smps suppling regular current for led-light |
| CN102026448A (en) * | 2010-11-01 | 2011-04-20 | 王子能 | LED power circuit |
| CN202017899U (en) * | 2010-11-10 | 2011-10-26 | 深圳市丰泰晶电子科技有限公司 | High-efficiency ultra-low interference light-emitting diode (LED) energy-saving lamp |
| CN202077247U (en) * | 2011-06-20 | 2011-12-14 | 江阴职业技术学院 | Illumination drive power supply for Light-emitting diode (LED) streetlamp |
| CN202551447U (en) * | 2012-04-13 | 2012-11-21 | 汕头市南帆电器有限公司 | LED (light-emitting diode) power supply |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795025A (en) * | 2014-01-23 | 2014-05-14 | 重庆四联光电科技有限公司 | Anti-lightning overvoltage protecting circuit |
| WO2019179007A1 (en) * | 2018-03-23 | 2019-09-26 | 深圳市电明科技股份有限公司 | Led lighting device |
| CN109296995A (en) * | 2018-11-02 | 2019-02-01 | 华域视觉科技(上海)有限公司 | LED lamp mould group and LED light source driving circuit |
| CN109296995B (en) * | 2018-11-02 | 2024-02-06 | 华域视觉科技(上海)有限公司 | LED lamp module and LED light source driving circuit |
| CN111479354A (en) * | 2019-01-04 | 2020-07-31 | 一统光电（江苏）有限公司 | Interference-free low-cost long-life L ED power supply directly using mains supply and L ED lighting appliance thereof |
| CN110515013A (en) * | 2019-07-25 | 2019-11-29 | 广东浪潮大数据研究有限公司 | A kind of dielectric strength test method, system and server power supply |
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Application publication date: 20120801 |