CN103517523A - High-voltage constant-current drive circuit and LED light source with same - Google Patents
High-voltage constant-current drive circuit and LED light source with same Download PDFInfo
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- CN103517523A CN103517523A CN201310439989.1A CN201310439989A CN103517523A CN 103517523 A CN103517523 A CN 103517523A CN 201310439989 A CN201310439989 A CN 201310439989A CN 103517523 A CN103517523 A CN 103517523A
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Abstract
The invention discloses a high-voltage constant-current drive circuit which comprises a rectifier module and a constant-current module. The constant-current module is a stabilized voltage supply regulator, the input end of the stabilized voltage supply regulator is connected with the positive electrode output of the constant-current module, and the output end of the stabilized voltage supply regulator is connected with a high-impedance load. The GND end of the stabilized voltage supply regulator is connected with a feedback resistor in series and then is connected with the output end of the stabilized voltage supply regulator. The negative electrode of an LED chip is connected with the negative electrode output of the rectifier module or is connected with the ground. Meanwhile, the invention further discloses an LED light source with the circuit. The stabilized voltage supply regulator is creatively used as a constant current controller, and controls the rectified alternating currents directly in a constant-current mode and then supplies the currents to the high-impedance load. The magnitude of the output constant currents of the output can be conveniently regulated through changing of the feedback resistor, the structure is concise, cost is low, and market competitiveness is effectively improved.
Description
Technical field
The present invention relates to power technique fields, particularly relate to the LED light source of a kind of high voltage and constant current drive circuit and this circuit of use.
Background technology
Linear constant-current drive circuit, general alternating current circuit is converted to DC circuit, always be conventional drive circuit in present life and work, can be used for the DC equipment such as driving LED, what but present linear constant-current drive circuit generally all adopted is that common IC chip drives, the size of current driving is controlled by IC chip, and the driver output of IC chip is limited in one's ability, cannot export the linear constant current drive current of high pressure, cause now in order to obtain high-voltage linear constant current drive current, can adopt the mode of polylith IC chip stack to export, like this, can cause again, too much apply IC chip, higher to resource requirement, unfavorable to environmental protection, and, efficiency is not high yet, therefore the LED high-voltage linear constant-current drive circuit of producing and develop a kind of high-efficiency environment friendly is imperative.
Chinese patent notification number: CN202310207 discloses a kind of high-voltage linear LED constant-current drive circuit, its low reference pin (R) by three ends voltage stabilizing didoe able to programme detects the electric current of the emitter resistance of the Darlington transistor being comprised of two high-voltage tubes, the negative electrode (K) that utilizes three ends voltage stabilizing didoe able to programme to the line impedance of anode (A) is subject to reference to the voltage-controlled characteristic of pin (R), adjust the base current of the high-voltage three-pole pipe of driving LED, make the driving current constant of LED in set point.Owing to using the form of two high-voltage three-pole pipe group Darlington transistors, so the electric current that its base stage needs is very little, and the power consuming on inclined to one side resistance is like this just very little, makes the efficiency of whole circuit very high.But this technical scheme still exists too much application IC chip, higher to resource requirement, unfavorable to environmental protection, and efficiency is not high problem also, and is applied on the drive circuit of LED and also can causes volume excessive.
Summary of the invention
The object of the invention is for the technological deficiency existing in prior art, and a kind of high voltage and constant current drive circuit and the LED light source that uses this circuit are provided.
For realizing the technical scheme that object of the present invention adopts, be:
A kind of high voltage and constant current drive circuit, comprise the rectification module that input is communicated with alternating current, be connected with the output of described rectification module and in order to the constant flow module of constant current to be provided to high impedance load, described constant flow module is stabilized voltage power supply adjuster, the described input of stabilized voltage power supply adjuster and the output of the positive pole of constant flow module are connected, the output of described stabilized voltage power supply adjuster is connected with high impedance load, after the GND end serial Feedback resistance of described stabilized voltage power supply adjuster, be connected with the output of stabilized voltage power supply adjuster, the negative pole of described LED chip is connected or ground connection with the output of the negative pole of rectification module.
Described rectification module is bridge rectifier module, and described stabilized voltage power supply adjuster is three-terminal voltage-stabilizing feed regulator isolator.
Described bridge rectifier module bridge heap, input and the external communication electric connection of described bridge heap, the cathode output end of described bridge heap is connected with the input of stabilized voltage power supply adjuster.
The cathode output end of piling at described bridge and the output of three-terminal voltage-stabilizing feed regulator isolator are also respectively arranged with high-voltage filtering capacitor C1 and the C2 of earth.
Described high impedance load is the series-parallel LED chip of many groups or LED lamp pearl.
, comprise high voltage and constant current drive circuit as claimed in claim 1 and by the LED lamp group of described high voltage and constant current drive circuit energy supply, described LED lamp group comprises a plurality of series-parallel LED chips or LED lamp pearl.
Described high voltage and constant current drive circuit and LED lamp group are arranged on same substrate, and described high voltage and constant current drive circuit adopts SMD device, and that described LED lamp group adopts is SMD, plug-in type or polycrystalline packaged type are arranged on substrate.
On each or every a plurality of LED chip or LED lamp pearl, be also provided with in parallel filter capacitor C3.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is creatively using stabilized voltage power supply adjuster as constant-current controller, and it controls rear function to high impedance load by the direct constant current of the alternating current after rectification, gets final product the output constant current size of convenient adjustment output by changing feedback resistance.Using stabilized voltage power supply adjuster as constant-current source, during especially to high-voltage load, himself operating current is little, generate heat little, without focus, then when constant current is provided without heat abstractor is set, and structure simplifies, cost is low, effectively improves the market competitiveness.
As the preferably load using the LED chip of the many also many string loops of employing as circuit of the present invention, loop current is less, produce temperature-rise effect lower, single loop only needs 20 milliamperes of electric currents, by the requirement of LED chip specification, little operating current like this, the working temperature of LED chip is at 75-80 degree, the upper limit 110 degree that do not surpass specification, give full play to the usefulness of LED chip, can avoid dead lamp on a large scale simultaneously, also do not need to do heat dissipation, more can simplify strip source structure, reduce manufacturing cost.
Accompanying drawing explanation
Figure 1 shows that strip source structural representation of the present invention;
Figure 2 shows that strip source electrical block diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 2, high voltage and constant current drive circuit of the present invention comprises resistance R 1, R2, bridge rectifier 6 and three-terminal voltage-stabilizing feed regulator isolator 7, the input of described rectification circuit respectively after resistance R 1 and R2 with external communication electric connection, the input of described three-terminal voltage-stabilizing feed regulator isolator is connected with the output of the positive pole of rectifier circuit 6, the output of described three-terminal voltage-stabilizing feed regulator isolator is connected to give its energy supply with high impedance load, after the GND end serial Feedback resistance R 3 of described three-terminal voltage-stabilizing feed regulator isolator, be connected with the output of three-terminal voltage-stabilizing feed regulator isolator, the negative pole of described LED chip is connected with the output of the negative pole of rectifier circuit, preferably, at the cathode output end of described rectifier circuit and the output of three-terminal voltage-stabilizing feed regulator isolator, high-voltage filtering capacitor C1 and C2 have also been arranged in parallel respectively, described high-voltage filtering capacitor C1 and C2 other end ground connection or be connected with the negative pole output of described bridge heap.Described high impedance load is preferably HV LED, certainly also can be other any high pressure low current devices, and high pressure herein refers to the direct current obtaining through the direct rectification of civil power alternating current, does not need to carry out transformer pressure-reducing.
It should be noted that, described rectification circuit can adopt the commutation technique of arbitrary form, described voltage stabilizing adjuster is not limited to three ends, by corresponding this voltage stabilizing adjuster that connects of thinking of the present invention, soon hold to be output as with reference to and corresponding adjustment feedback resistance all can realize aim of the present invention.Wherein, described three-terminal voltage-stabilizing feed regulator isolator is preferably 78 series, as 78L05, and 78L09,78L12 etc.The ground end of three-terminal voltage-stabilizing feed regulator isolator is communicated with output through feedback resistance, creatively using stabilized voltage power supply adjuster as constant-current controller, it can be widely used in alternating current high pressure, as 220V, 100V and 110v etc., himself pressure drop is according to model difference and inequality, generally, several volts or tens volts, it can export the electric current of 0-100mA consistently simultaneously, by changing the constant current size that feedback resistance can convenient adjustment output.Using stabilized voltage power supply adjuster as constant-current source, during especially to high-voltage load, himself operating current is little, generate heat little, without focus, then when constant current is provided without heat abstractor is set, and structure simplifies, cost is low, effectively improves the market competitiveness.
Rectification circuit is preferably bridge heap, and its inside is comprised of a plurality of diodes, and Main Function is rectification, adjusts the sense of current.Four pipes of its inside are generally selected pairing, so its performance is more approaching, while being exactly powerful rectification in addition, Qiao Duishang can fill radiating block so that when work performance more stable.
As shown in Figure 1, 2, the present invention has provided embodiment that this high voltage and constant current drive circuit is applied to driving LED light source simultaneously, wherein, it is to be noted, described LED light source wraps the LED chip of going here and there and connecting or quantity and its operating voltage of LED lamp pearl matches, and described LED light source is HV LED.; the strip source that is directly applied for 220V alternating current of take is example; if adopt the LED chip of 3V20mA, alternating current probably at 215V, needs the LED chip that 72 groups of series connection are set to meet its operating voltage demand at voltage after pass a bridge heap and three-terminal voltage-stabilizing feed regulator isolator.Preferably, every group comprises 3 LED chips, A, and B, C arranges 216 LED chips on substrate, and the constant current that three-terminal voltage-stabilizing feed regulator isolator provides so is accordingly 60mA.
Be understandable that, by design concept of the present invention, can produce different power and the strip source of spectrum, as 5 watts of white lights, 10 watts of warm whites, or the alternate plant lamp bar light source of red indigo plant all can, even can be connected in series as longer stripe shape light source or the color strip source of horn of plenty more, it can produce single string, sealing two also, seals three also, from different spectral mixings, the stripe shape light that is more suitable for plant lamp is of long standing and well established, for special-purpose stripe shape light source of agricultural greenhouse etc.
Because back segment light source is the LED light source module that belongs to high voltage low current; a plurality of series-parallel LED chips itself are own through having formed high impedance load; bridge heap was enough to be competent at coordinating of 78L05, did not need to use transformer to do power supply and transformed, to a kind of protective effect of 78L05 also self-assembling formation.Because low current work can not produce focus, all voltage is transformed into LED chip load end completely, so 78L05 has only brought into play constant current effectiveness, the 78L05 100 milliamperes of electric currents of can working, only be applied to 60 milliamperes of electric currents herein, do not have the hot spot-effect of overtension, the whole LED chip polycrystalline encapsulation technology that adopts, reach the magical effect of microminiaturization, only taken minimum substrate space.
In the embodiment of the present invention, adopt the many also many string loops technology of LED chip, principal character is exactly that loop current is less, produce temperature-rise effect lower, because adopt high voltage high impedance load pattern, thereby there is no a device of core transformers, its single loop only needs 20 milliamperes of electric currents, by the requirement of LED chip specification, little operating current like this, the working temperature of LED chip is at 75-80 degree, does not surpass the upper limit 110 degree of specification, give full play to the usefulness of LED chip, do not need to do heat dissipation, more can simplify strip source structure, reduce manufacturing cost yet.Simultaneously because closed many and loop-type design, when there is the dead lamp situation of monocrystalline, every group of two LED chips of take are example, electric current can arrive another chip on the same group by automatic shunt, for chip operating current, be 20mA+20mA=40mA, by chip specifications, record greatest limit 70mA electric current, still within the scope of safe current, can simultaneously dead lamp.So problem that can the dead lamp of large area, is different from single string or goes here and there the major defect of open loop more.If adopt three also many string loop designs, during the dead lamp of monocrystalline, its other two HVLED operating currents on the same group become 30mA, within safe current scope, can guarantee not have the risk of the dead lamp of large area equally.
Closer, at described one or more groups, on every 9 groups of LED chips as shown in Figure 2, be also provided with in parallel filter capacitor C3, specifically, the Copper Foil interblock at rear side is provided with every nine groups of connecting lines that are communicated with and filter capacitor is set on connecting line.On electric power loop, adopt higfh-tension ceramics filter capacitor, the ripple in filtering DC power supply and multiple harmonic, the sudden strain of a muscle of minimizing LED is effect frequently, and highdensity LED chip is arranged, and does not put luminous effect, stabilized light source.
Be in above-described embodiment, take rational data arrangement, make LED chip comply with programming nation and determine die bond, with large-sized automatic mechanical hand, once put rubber seal and install into light source, and again better by the combination of polycrystalline integration packaging and SMD microminiaturization paster technique, utilize mechanization production, can also keep uniformity and the stability of product quality, and can reduce costs.
Certainly, also can adopt lamp pearl formula, SMD design, type of attachment is Without wishing and above-described embodiment also, and the HV LED circuit that connected mode forms arbitrarily all can directly be driven by high-voltage constant-current circuit of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a high voltage and constant current drive circuit, it is characterized in that, comprise the rectification module that input is communicated with alternating current, be connected with the output of described rectification module and in order to the constant flow module of constant current to be provided to high impedance load, described constant flow module is stabilized voltage power supply adjuster, the described input of stabilized voltage power supply adjuster and the output of the positive pole of constant flow module are connected, the output of described stabilized voltage power supply adjuster is connected with high impedance load, after the GND end serial Feedback resistance of described stabilized voltage power supply adjuster, be connected with the output of stabilized voltage power supply adjuster, the negative pole of described LED chip is connected or ground connection with the output of the negative pole of rectification module.
2. high voltage and constant current drive circuit as claimed in claim 1, is characterized in that, described rectification module is bridge rectifier module, and described stabilized voltage power supply adjuster is three-terminal voltage-stabilizing feed regulator isolator.
3. high voltage and constant current drive circuit as claimed in claim 2, is characterized in that, described bridge rectifier module bridge heap, and input and the external communication electric connection of described bridge heap, the cathode output end of described bridge heap is connected with the input of stabilized voltage power supply adjuster.
4. high voltage and constant current drive circuit as claimed in claim 3, is characterized in that, the cathode output end of piling at described bridge and the output of three-terminal voltage-stabilizing feed regulator isolator are also respectively arranged with high-voltage filtering capacitor C1 and the C2 of earth.
5. bridge rectifier module constant-current circuit as claimed in claim 4, is characterized in that, described high impedance load is the series-parallel LED chip of many groups or LED lamp pearl.
6. a LED light source, is characterized in that, comprises high voltage and constant current drive circuit as claimed in claim 1 and by the LED lamp group of described high voltage and constant current drive circuit energy supply, described LED lamp group comprises a plurality of series-parallel LED chips or LED lamp pearl.
7. LED light source as claimed in claim 6, it is characterized in that, described high voltage and constant current drive circuit and LED lamp group are arranged on same substrate, described high voltage and constant current drive circuit adopts SMD device, and that described LED lamp group adopts is SMD, plug-in type or polycrystalline packaged type are arranged on substrate.
8. LED light source as claimed in claim 6, is characterized in that, on each or every a plurality of LED chip or LED lamp pearl, is also provided with in parallel filter capacitor C3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310439989.1A CN103517523A (en) | 2013-09-25 | 2013-09-25 | High-voltage constant-current drive circuit and LED light source with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310439989.1A CN103517523A (en) | 2013-09-25 | 2013-09-25 | High-voltage constant-current drive circuit and LED light source with same |
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| CN103517523A true CN103517523A (en) | 2014-01-15 |
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| CN201310439989.1A Pending CN103517523A (en) | 2013-09-25 | 2013-09-25 | High-voltage constant-current drive circuit and LED light source with same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015149210A1 (en) * | 2014-03-31 | 2015-10-08 | 东莞高仪电子科技有限公司 | Led lamp panel, high-voltage pulse protection circuit of led lamp panel and led lamp |
| CN105472818A (en) * | 2016-01-13 | 2016-04-06 | 黎时勇 | LED lighting circuit |
| CN108575006A (en) * | 2017-03-09 | 2018-09-25 | 郭尔峰 | A kind of LED light source of COB encapsulation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050023536A1 (en) * | 2003-07-29 | 2005-02-03 | Shackle Peter W. | LED drive for generating constant light output |
| CN101977473A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Indoor light-emitting diode (LED) constant current illuminating lamp |
| CN201789659U (en) * | 2010-07-23 | 2011-04-06 | 佛山市神之光宇星照明实业有限公司 | LED drive circuit |
| CN203523092U (en) * | 2013-09-25 | 2014-04-02 | 天津金玛光电有限公司 | High-voltage constant-current drive circuit and LED light source using circuit |
-
2013
- 2013-09-25 CN CN201310439989.1A patent/CN103517523A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050023536A1 (en) * | 2003-07-29 | 2005-02-03 | Shackle Peter W. | LED drive for generating constant light output |
| CN201789659U (en) * | 2010-07-23 | 2011-04-06 | 佛山市神之光宇星照明实业有限公司 | LED drive circuit |
| CN101977473A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Indoor light-emitting diode (LED) constant current illuminating lamp |
| CN203523092U (en) * | 2013-09-25 | 2014-04-02 | 天津金玛光电有限公司 | High-voltage constant-current drive circuit and LED light source using circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015149210A1 (en) * | 2014-03-31 | 2015-10-08 | 东莞高仪电子科技有限公司 | Led lamp panel, high-voltage pulse protection circuit of led lamp panel and led lamp |
| CN105472818A (en) * | 2016-01-13 | 2016-04-06 | 黎时勇 | LED lighting circuit |
| CN108575006A (en) * | 2017-03-09 | 2018-09-25 | 郭尔峰 | A kind of LED light source of COB encapsulation |
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Application publication date: 20140115 |