CN201766755U - Constant current driving power supply of LED - Google Patents
Constant current driving power supply of LED Download PDFInfo
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- CN201766755U CN201766755U CN2010205247099U CN201020524709U CN201766755U CN 201766755 U CN201766755 U CN 201766755U CN 2010205247099 U CN2010205247099 U CN 2010205247099U CN 201020524709 U CN201020524709 U CN 201020524709U CN 201766755 U CN201766755 U CN 201766755U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to a constant current driving power supply, specifically to a constant current driving power supply of an LED for supplying power to LED driven IC. The circuit belongs to a passive power factor compensation circuit with low cost. A rectifier bridge is connected to a balance self-bridge compensation circuit; a padding principle is adopted for compensating, and simultaneously, an induction correction circuit is adopted. The circuit is low in cost of passive PFC correction, and high in power factor of an active PFC circuit, is the first solution of driving IC power supply problem in the LED driving power module, and improves the working stability and current precision of IC, and has high economic benefit and reliability.
Description
Technical field
The utility model relates to a kind of constant-current driving power supply, the constant-current driving power supply of especially a kind of LED for LED drive IC power supply.
Background technology
The constant-current driving power supply of LED when promptly using LED as display or other lighting apparatus or backlight, need carry out the power supply of constant-current driving to it.
According to the characteristic requirement of the electricity consumption of electrical network rule and LED driving power, when selecting and design the LED driving power, to consider following some:
1. high reliability.The driving power of special picture LED street lamp is contained in the high-altitude, and maintenance is inconvenient, and the cost of maintenance is also big.
2. high efficiency.LED is an energy-conserving product, and it is high that the efficient of driving power is wanted.Be installed in structure in the light fixture for power supply, particularly important.Because the luminous efficiency of LED descends along with the rising of LED temperature, so the heat radiation of LED is extremely important.The efficient height of power supply, its dissipation power is little, and is just little in light fixture internal heat generation amount, also just reduced the temperature rise of light fixture.Favourable to the light decay that delays LED.
3. high power factor.Power factor (PF) is the requirement of electrical network to load.General electrical appliance below 70 watts does not have mandatory index.Though it is a bit little to the influence of electrical network that the little single electrical appliance power factor (PF) of power is hanged down, light a lamp evening, and similar load is too concentrated, can produce more serious pollution to electrical network.For 30 watts ~ 40 watts LED driving power, it is said in the near future perhaps can the certain index requirement be arranged to the power factor (PF) aspect.
4. type of drive.Current now has two kinds: constant pressure source of the first is for a plurality of constant-current sources, and each constant-current source is given every paths of LEDs power supply separately.This mode, combination is flexible, and a paths of LEDs fault does not influence the work of other LED, but cost can omit height a bit.Another kind is direct constant current power supply, the operation of LED serial or parallel connection.Its advantage is that cost is a little low, but very flexible also will solve certain LED fault, does not influence the problem of other LED operations.These two kinds of forms are in a period of time and deposit.Multiple constant current output supply power mode can be better at cost and aspect of performance.Perhaps be later main flow direction.
5. surge protection.The ability of LED antisurge is poor, particularly anti-reverse voltage ability.The protection of strengthening this respect is also very important.Some LED lamp is contained in the open air, as the LED street lamp.Owing to the induction of getting rid of and being struck by lightning of opening of electrical network load, can invade various surges from network system, some surge can cause the damage of LED.Therefore the LED driving power will have the intrusion that suppresses surge, the not impaired ability of protection LED.
6. defencive function.Power supply is except the defencive function of routine, and being preferably in increases the negative feedback of LED temperature in the constant current output, prevent that the LED temperature is too high.
7. protection aspect.The outer mount type of light fixture, power supply architecture is wanted waterproof, protection against the tide, and shell is wanted sun-proof.
8. the life-span of driving power is suitable with the life-span of LED.
9. to meet security regulations and electromagnetic compatibility requirements.
(Valley Fill Circuit) belongs to a kind of novel passive power factor corrector circuit " to fill out the paddy circuit "." filling out the paddy circuit " is with the current waveform behind the electric main rectifying and wave-filtering, is deployed into from the burst pulse shape and approaches sine wave shape, is equivalent to circuit greatly " has been filled and led up " in the zone, valley point in the short duration current waveform.
At present, general AC/DC converter all is connected with electrical network by rectification circuit.Its importation generally is made of bridge rectifier and filtering capacitor, and the two all belongs to non-linear element.Because the existence of big capacity filtering capacitor makes the angle of flow of rectifier diode become very narrow, near the only ability conducting peak value of AC-input voltage causes the interchange input current to produce serious distortion, becomes to be spike.Comprised a large amount of harmonic components in this current waveform, not only electrical network has been polluted, the active power that also causes exporting after the filtering significantly reduces, and power factor is reduced significantly.The power factor of common AC/DC converter is lower, only can reach about 0.6, and harmonic distortion simultaneously is big.Therefore, improve its power factor and can not only reduce line loss, can also reduce the harmonic pollution of electrical network, improve the power supply quality of electrical network.
" filling out the paddy circuit " is the angle of flow that the paddy circuit increases considerably rectifying tube of filling out that utilizes the rectifier bridge back, by filling and leading up the valley point, input current is become from spike approach sinusoidal wave waveform, power factor is brought up to about 0.89, can significantly reduce total harmonic distortion.Compare with traditional inductance type passive power factor correcting circuit, its advantage is that circuit is simple, and cost is lower, and the power factor compensation effect is remarkable, and does not need to use the big inductor of the big heavy of volume in input circuit.
Along with the application of LED is increasingly extensive, the performance of LED driving power will more and more be fit to the requirement of LED.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and the constant-current driving power supply of a kind of LED is provided, and improves the High Power Factor and the IC(integrated circuit of LED driving power) electric power system, improve circuit efficiency and stability.
The technical scheme that provides according to the utility model, the constant-current driving power supply of described LED comprises: two input termination AC power of bridge rectifier, wherein first input end connects AC power again through behind the differential mode inductance, the positive output of bridge rectifier connects the positive plate of first electric capacity and the negative electrode of the 3rd diode, the negative output of bridge rectifier connects the negative plate and the ground connection of the anode and second electric capacity of first diode, the negative plate of the negative electrode of first diode and first electric capacity connects the anode of second diode, the anode of the positive plate of second electric capacity and the 3rd diode connects the negative electrode of second diode, bridge rectifier just, connect the 3rd electric capacity between the negative output terminal, the positive plate exit of second electric capacity is externally powered.
Second input of described bridge rectifier is by insurance wire connection AC power.
Described first electric capacity and second capacitance equate.First electric capacity, second electric capacity all adopt electrochemical capacitor, and the 3rd electric capacity adopts electric capacity of the dacron.
The utility model has the advantages that: drive the field at LED, as the VIN power supply of high drive IC, this circuit has adopted to be filled out in the paddy circuit power taking and compresses into capable IC power supply; This circuit arrangement has the advantage of low cost that passive PFC proofreaies and correct, have active PFC(power factor correction again) advantage of circuit High Power Factor, be the preferred option of drive IC powerup issue in the LED driving power module simultaneously, improve job stability and the current precision of IC, have very high economic benefit and reliability and be worth.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.The utility model relates to a kind of LED constant-current drive circuit, is specially a kind of composite type and fills out passive PFC of paddy and power supply circuits.As shown in the figure, this circuit comprises: two input termination AC power of bridge rectifier, wherein connect AC power again behind the first input end process differential mode inductance L, the positive output of bridge rectifier connects the positive plate of first capacitor C 1 and the negative electrode of the 3rd diode D3, the negative output of bridge rectifier connects the anode of the first diode D1 and the negative plate and the ground connection of second capacitor C 2, the negative plate of the negative electrode of the first diode D1 and first capacitor C 1 connects the anode of the second diode D2, the anode of the positive plate of second capacitor C 2 and the 3rd diode D3 connects the negative electrode of the second diode D2, bridge rectifier just, the positive plate exit A that connects the 3rd capacitor C 3, the second capacitor C 2 between the negative output terminal externally powers.First capacitor C 1 and second capacitor C, 2 capacity equate.First capacitor C 1, second capacitor C 2 adopt electrochemical capacitor, and the 3rd capacitor C 3 adopts electric capacity of the dacron.An input of bridge rectifier connects AC power by inductance L, and another input connects AC power by fuse FUSE.
This circuit all is made of passive component, and diode D1, D2, D3 and capacitor C 1, C2 form a standard valley fill circuit, bridge rectifier DB in inductance L, fill out between the paddy circuit.
This circuit belongs to a kind of compensating circuit of passive power factor cheaply.This circuit is balancing half-bridge compensation circuit behind the rectifier bridge among the figure, and capacitor C 1 and diode D3 form an arm of half-bridge, and capacitor C 2 and diode D1 form another arm of half-bridge, and diode D2 is the charging connecting path, and utilization is filled out the paddy principle and compensated.Adopt inductively compensated circuit simultaneously, its advantage is that circuit is simple, and cost is lower, and the power factor compensation effect is remarkable, and does not need to use the big inductor of the big heavy of volume in input circuit.
After adopting this circuit, the power factor of system brings up to 0.94 ~ 0.96 from 0.88 ~ 0.9, compares favourably with active PFC power factor circuit, breaks the technical field that passive power factor can not be broken through 0.90-0.92.Size in conjunction with C3 appearance value is being guaranteed under the situation of power factor at 0.93-0.92 harmonic distortion≤35%.Even lost 2 percentages of power factor like this, but guaranteed with market on fill out the paddy circuit and increase 2 percentages (under the price situation), satisfied the requirement of harmonic distortion.
Half V of voltage after the voltage maintenance rectification on the while capacitor C 2
DC/ 2, in case line drop is to V
DCBelow/2, diode D1 and D3 will be made C1 and C2 begin parallel discharge by forward bias like this.Promptly in input civil power 220V, the A point voltage is being stablized 150V.Like this for the LED driving power, especially be in the non-insulating power supply LED chip for driving IC electric power system often from the bus power taking press, promptly the power taking of 308V high pressure is pressed after the rectification.Voltage is fluctuation after the rectification like this, be fluctuation also, also make LED chip for driving IC internal work the driven MOS change in duty cycle occur causing unusually even the VCC of LED chip for driving IC increases voltage stabilizing circuit with regard to the supply power voltage that LED chip for driving IC is taken off.Cause the voltage regulation of system to descend.Adopt this patent from the power taking of C2 electric capacity, not only reduced the bus power taking Keep Clear-High Voltage property, reduced dangerous for LED chip for driving IC power supply simultaneously and improved stability.Reduce the power consumption of power-supply circuit simultaneously, thereby improved system effectiveness.Save loaded down with trivial details LED and driven non-insulating power supply IC power supply circuits.Save cost.
Claims (4)
1. the constant-current driving power supply of a LED, it is characterized in that: two input termination AC power that comprise bridge rectifier, wherein connect AC power again behind the first input end process differential mode inductance (L), the positive output of bridge rectifier connects the positive plate of first electric capacity (C1) and the negative electrode of the 3rd diode (D3), the negative output of bridge rectifier connects the negative plate and the ground connection of the anode and second electric capacity (C2) of first diode (D1), the negative plate of the negative electrode of first diode (D1) and first electric capacity (C1) connects the anode of second diode (D2), the anode of the positive plate of second electric capacity (C2) and the 3rd diode (D3) connects the negative electrode of second diode (D2), bridge rectifier just, connect the 3rd electric capacity (C3) between the negative output terminal, the positive plate exit (A) of second electric capacity (C2) is power supply externally.
2. the constant-current driving power supply of LED as claimed in claim 1 is characterized in that second input of described bridge rectifier connects AC power by fuse (FUSE).
3. the constant-current driving power supply of LED as claimed in claim 1 is characterized in that described first electric capacity (C1) and second electric capacity (C2) capacity equate.
4. the constant-current driving power supply of LED as claimed in claim 1 is characterized in that described first electric capacity (C1), second electric capacity (C2) adopt electrochemical capacitor, and the 3rd electric capacity (C3) adopts electric capacity of the dacron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205247099U CN201766755U (en) | 2010-09-10 | 2010-09-10 | Constant current driving power supply of LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205247099U CN201766755U (en) | 2010-09-10 | 2010-09-10 | Constant current driving power supply of LED |
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| Publication Number | Publication Date |
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| CN201766755U true CN201766755U (en) | 2011-03-16 |
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| CN2010205247099U Expired - Lifetime CN201766755U (en) | 2010-09-10 | 2010-09-10 | Constant current driving power supply of LED |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437726A (en) * | 2011-12-20 | 2012-05-02 | 成都成电硅海科技股份有限公司 | Passive PF correction circuit |
| CN102802303A (en) * | 2011-05-24 | 2012-11-28 | 日亚化学工业株式会社 | Light-emitting diode driving apparatus including charging/discharging capacitor |
| CN102858071A (en) * | 2012-09-27 | 2013-01-02 | 魏其萃 | High-power-factor direct-current current output light-emitting diode (LED) driving circuit with low-energy-storage capacitor |
| CN103249204A (en) * | 2012-02-07 | 2013-08-14 | 深圳市比格利电源科技有限公司 | Built-in drive power supply of LED fluorescent lamp |
| CN103634974A (en) * | 2012-08-27 | 2014-03-12 | 海立尔股份有限公司 | LED drive circuit structure with dark area filling |
| CN104749418A (en) * | 2015-04-03 | 2015-07-01 | 四川蓝讯宝迩电子科技有限公司 | Indoor high voltage electrified display device |
| CN104749420A (en) * | 2015-04-03 | 2015-07-01 | 四川蓝讯宝迩电子科技有限公司 | Sensing type high-voltage presence indication device |
| CN104749422A (en) * | 2015-04-03 | 2015-07-01 | 四川蓝讯宝迩电子科技有限公司 | High-voltage live display circuit for improving flaring brightness |
| CN104749417A (en) * | 2015-04-03 | 2015-07-01 | 四川蓝讯宝迩电子科技有限公司 | High-voltage live display system for enhancing prompting effect |
| CN104981065A (en) * | 2015-06-23 | 2015-10-14 | 成都亿信标准认证集团有限公司 | LED drive device with valley fill circuit |
| CN105939549A (en) * | 2015-03-02 | 2016-09-14 | 晶元光电股份有限公司 | Driver of light emitting diode and related lighting system |
| CN110224584A (en) * | 2019-07-03 | 2019-09-10 | 广东美的制冷设备有限公司 | Household appliance and its passive power factor correcting circuit |
-
2010
- 2010-09-10 CN CN2010205247099U patent/CN201766755U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802303A (en) * | 2011-05-24 | 2012-11-28 | 日亚化学工业株式会社 | Light-emitting diode driving apparatus including charging/discharging capacitor |
| US8847509B2 (en) | 2011-05-24 | 2014-09-30 | Nichia Corporation | Light-emitting diode driving apparatus including charging/discharging capacitor |
| CN102802303B (en) * | 2011-05-24 | 2015-03-04 | 日亚化学工业株式会社 | Light-emitting diode driving apparatus including charging/discharging capacitor |
| CN102437726A (en) * | 2011-12-20 | 2012-05-02 | 成都成电硅海科技股份有限公司 | Passive PF correction circuit |
| CN103249204A (en) * | 2012-02-07 | 2013-08-14 | 深圳市比格利电源科技有限公司 | Built-in drive power supply of LED fluorescent lamp |
| CN103634974A (en) * | 2012-08-27 | 2014-03-12 | 海立尔股份有限公司 | LED drive circuit structure with dark area filling |
| CN102858071A (en) * | 2012-09-27 | 2013-01-02 | 魏其萃 | High-power-factor direct-current current output light-emitting diode (LED) driving circuit with low-energy-storage capacitor |
| CN102858071B (en) * | 2012-09-27 | 2014-09-17 | 魏其萃 | High-power-factor direct-current current output light-emitting diode (LED) driving circuit with low-energy-storage capacitor |
| CN105939549A (en) * | 2015-03-02 | 2016-09-14 | 晶元光电股份有限公司 | Driver of light emitting diode and related lighting system |
| CN105939549B (en) * | 2015-03-02 | 2020-03-17 | 晶元光电股份有限公司 | Driver of light emitting diode and related lighting system |
| CN104749418A (en) * | 2015-04-03 | 2015-07-01 | 四川蓝讯宝迩电子科技有限公司 | Indoor high voltage electrified display device |
| CN104749417A (en) * | 2015-04-03 | 2015-07-01 | 四川蓝讯宝迩电子科技有限公司 | High-voltage live display system for enhancing prompting effect |
| CN104749422A (en) * | 2015-04-03 | 2015-07-01 | 四川蓝讯宝迩电子科技有限公司 | High-voltage live display circuit for improving flaring brightness |
| CN104749420A (en) * | 2015-04-03 | 2015-07-01 | 四川蓝讯宝迩电子科技有限公司 | Sensing type high-voltage presence indication device |
| CN104981065A (en) * | 2015-06-23 | 2015-10-14 | 成都亿信标准认证集团有限公司 | LED drive device with valley fill circuit |
| CN110224584A (en) * | 2019-07-03 | 2019-09-10 | 广东美的制冷设备有限公司 | Household appliance and its passive power factor correcting circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUXI JINGYUAN MICROELECTRONICS CO., LTD. Free format text: FORMER OWNER: WUXI AIXINKE MICROELECTRONICS CO., LTD. Effective date: 20120821 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120821 Address after: 214028 A building, block 106-C, national hi tech Industrial Development Zone, Jiangsu, Wuxi, 209 Patentee after: Wuxi Jingyuan Microelectronics Co., Ltd. Address before: 214028, A, block 2, Jiangsu international technology transfer center, 8 Xintai Road, New District, Jiangsu, Wuxi, 5F Patentee before: Wuxi Aixinke Microelectronics Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110316 |