CN201378883Y - Constant-voltage LED lighting circuit - Google Patents
Constant-voltage LED lighting circuit Download PDFInfo
- Publication number
- CN201378883Y CN201378883Y CN200920053126U CN200920053126U CN201378883Y CN 201378883 Y CN201378883 Y CN 201378883Y CN 200920053126 U CN200920053126 U CN 200920053126U CN 200920053126 U CN200920053126 U CN 200920053126U CN 201378883 Y CN201378883 Y CN 201378883Y
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- circuit
- voltage
- led
- constant
- voltage stabilizing
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- 230000000087 stabilizing effect Effects 0.000 claims description 32
- 238000005286 illumination Methods 0.000 claims description 10
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a constant-voltage LED lighting circuit with lower cost, simple structure, high efficiency, low power consumption and energy conservation. The circuit comprises a rectification circuit (1), a voltage-stabilizing circuit (2) and an LED load (3), alternating current is output from the output end of the voltage-stabilizing circuit (2) after being rectified through the rectification circuit (1), is changed into high and constant voltage direct current, and then passes through the LED load (3); the voltage-stabilizing circuit (2) adopts the switching power supply, and comprises a power factor correcting circuit (IC1); and the LED load (3) comprises at least one group of a plurality LEDs connected in series among which the output end of the voltage-stabilizing circuit (2) is connected in parallel. The utility model can be widely applied to the field of LED lighting circuits.
Description
Technical field
The utility model relates to a kind of constant-voltage LED illumination circuit.
Background technology
At present, the application of LED more and more widely is used for daily indoor also just more and more universal with LED light fixture outdoor lighting.Existing led drive circuit generally all is by current stabilization or voltage stabilizing circuit are set LED to be carried out drive controlling.In the application of LED light fixture especially LED street lamp, the illumination driving circuit of each producer adopts the Switching Power Supply scheme mostly, voltage is generally between 24～48V, because the power of street lamp is bigger, generally more than 120W, therefore to use many group Switching Power Supplies simultaneously, this can cause with high costs, the average power consumption of Switching Power Supply itself loss simultaneously is about 15～20%, and the energy consumption of the LED street lamp waste 15～20% of this just feasible originally energy-conservation province consumption makes energy-saving effect have a greatly reduced quality.Fig. 1 is a kind of existing isolation type switching power supply voltage stabilizing circuit, so-called " isolated " is meant that the earth terminal of the both sides of transformer is independently, the voltage of the power output end of sort circuit is lower, the LED limited amount of series connection, therefore to use many group Switching Power Supplies to export simultaneously, this can cause the circuit complexity, the line trouble, and cost is higher.Fig. 2 is a kind of existing non-isolated power supply constant-current circuit, though sort circuit can guarantee the current stabilization of output, but under the situation of a plurality of load parallel connections, then can cause the inequality of electric current in each branch road to distribute, so that after a paths of LEDs burns, quicken to cause all burning of a paths of LEDs easily.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and the constant-voltage LED illumination circuit that a kind of cost is lower, simple in structure, efficient is high, low in energy consumption, energy-conservation is provided.
The technical scheme that the utility model adopted is: the utility model comprises rectification circuit, voltage stabilizing circuit, LED load, the described LED load of flowing through behind the direct current of alternating current through become the high pressure constant voltage after the described rectification circuit rectification from the output of the output of described voltage stabilizing circuit, described voltage stabilizing circuit is a Switching Power Supply, described voltage stabilizing circuit comprises circuit of power factor correction, described LED load comprises at least one group of several LED that are in series, and each organizes the output that directly is connected to described voltage stabilizing circuit in parallel again between described several LED that are in series.
Described constant-voltage LED illumination circuit also comprises short-circuit protection circuit, and described short-circuit protection circuit is connected between the input and described rectification circuit of AC power.
Described rectification circuit adopts bridge rectifier.
The beneficial effects of the utility model are: because the utility model comprises rectification circuit, voltage stabilizing circuit, the LED load, the described LED load of flowing through behind the direct current of alternating current through become the high pressure constant voltage after the described rectification circuit rectification from the output of the output of described voltage stabilizing circuit, described voltage stabilizing circuit is a Switching Power Supply, described voltage stabilizing circuit comprises circuit of power factor correction IC, described LED load comprises at least one group of several LED that are in series, each organizes the output that directly is connected to described voltage stabilizing circuit in parallel again between described several LED that are in series, by described rectification circuit, described voltage stabilizing circuit obtains stable high tension voltage output, and at least one group of several LED that are in series directly are connected to the output of described voltage stabilizing circuit, many group Switching Power Supplies have been avoided using, make circuit element significantly reduce, circuit is simple, and cost is lower.In addition, described voltage stabilizing circuit comprises circuit of power factor correction, makes that circuit is simple, efficient is high, can provide the output of the stable high-voltage power supply of voltage to described LED load, so the utility model cost is lower, simple in structure, efficient is high, low in energy consumption, energy-conservation.
Description of drawings
Fig. 1 is a kind of schematic diagram of existing isolation type switching power supply voltage stabilizing circuit;
Fig. 2 is a kind of schematic diagram of existing non-isolated power supply constant-current circuit;
Fig. 3 is the circuit diagram of the utility model embodiment one;
Fig. 4 is the circuit diagram of the utility model embodiment two.
Embodiment
Embodiment one:
As shown in Figure 3; the constant-voltage LED illumination circuit of present embodiment comprises rectification circuit 1; voltage stabilizing circuit 2; LED load 3; short-circuit protection circuit 5; the described LED load 3 of flowing through behind the direct current of alternating current through become the high pressure constant voltage after described rectification circuit 1 rectification from the output of the output of described voltage stabilizing circuit 2; described rectification circuit 1 adopts by four rectifier diode D1; D2; D3; the bridge rectifier that D4 forms; described short-circuit protection circuit 5 comprises fuse F1 and piezo-resistance RV1; be used for overcurrent and short-circuit protection; be connected between the input and described rectification circuit 1 of AC power; described voltage stabilizing circuit 2 is Switching Power Supplies; described voltage stabilizing circuit 2 comprises circuit of power factor correction IC1; the model that described circuit of power factor correction IC1 adopts ST company to produce is the power supply PFC power factor control circuit of L6561; it is simple that it has a circuit; the efficient advantages of higher; its power factor can reach more than 98% when normal pressure 220V; be widely used at present in the power circuit of required power factor correctings such as electricity-saving lamp; its peripheral cell comprises six capacitor C 1～C6; 11 resistance R 1～R9; R1 '; R9 '; three diode D5～D7; a metal-oxide-semiconductor Q1; an inductance coil T1; described LED load 3 comprises one group of 121 LED that are in series; this organizes the output that directly is connected to described voltage stabilizing circuit 2 after described 121 LED are in series; the quantity of the described LED that is in series should be looked the voltage V of the output of described voltage stabilizing circuit 2
0And the conducting voltage V of average each described LED
FAnd decide, so the number of described LED approximates V
0/ V
F, in the present embodiment, the output end voltage V of described voltage stabilizing circuit 2
0=400V, the conducting voltage V of each described LED
F=3.3V, then the number of LED described in the present embodiment is V
0/ V
F=121.
Embodiment two:
As shown in Figure 4, the difference of present embodiment and embodiment one is: the described load 3 of present embodiment comprises four groups of LED that are in series, the quantity of every group of described LED is 121, respectively organizes between the described LED output that directly is connected to described voltage stabilizing circuit 2 in parallel after the series connection again.In the present embodiment, the quantity Calculation mode of the every group of described LED that contacts mutually is identical with embodiment one.
All the other features of present embodiment are with embodiment one.
The utility model by described rectification circuit 1 rectification after through with obtaining stable high tension voltage output after described voltage stabilizing circuit 2 frequency modulation of described circuit of power factor correction IC1 or the pulsewidth adjustment, and at least one group of several LED that are in series directly are connected to the output of described voltage stabilizing circuit 2, avoided using many group Switching Power Supplies low-voltage (24～48V), high electric current (1～3A) drive scheme, be a kind of brand-new high voltage (about 400V), low current (0.3～0.5A) drive scheme, make circuit element significantly reduce, circuit is simple, and cost is lower.In addition, described voltage stabilizing circuit 2 comprises circuit of power factor correction IC1, makes that circuit is simple, efficient is high, and its effective power greater than 92%, can provide voltage stable high-voltage power supply output to described LED load 3 when normal pressure 220V.
The utility model can be widely used in LED lighting circuit field.
Claims (3)
1, a kind of constant-voltage LED illumination circuit, it is characterized in that: comprise rectification circuit (1), voltage stabilizing circuit (2), LED load (3), the described LED load (3) of flowing through behind the direct current of alternating current through become the high pressure constant voltage after described rectification circuit (1) rectification from the output of the output of described voltage stabilizing circuit (2), described voltage stabilizing circuit (2) is a Switching Power Supply, described voltage stabilizing circuit (2) comprises circuit of power factor correction (IC1), described LED load (3) comprises at least one group of several LED that are in series, and each organizes between described several LED that are in series the output that parallel connection more directly is connected to described voltage stabilizing circuit (2).
2, constant-voltage LED illumination circuit according to claim 1 is characterized in that: described constant-voltage LED illumination circuit also comprises short-circuit protection circuit (5), and described short-circuit protection circuit (5) is connected between the input and described rectification circuit (1) of AC power.
3, constant-voltage LED illumination circuit according to claim 1 is characterized in that: described rectification circuit (1) adopts bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920053126U CN201378883Y (en) | 2009-03-23 | 2009-03-23 | Constant-voltage LED lighting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920053126U CN201378883Y (en) | 2009-03-23 | 2009-03-23 | Constant-voltage LED lighting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201378883Y true CN201378883Y (en) | 2010-01-06 |
Family
ID=41519001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920053126U Expired - Fee Related CN201378883Y (en) | 2009-03-23 | 2009-03-23 | Constant-voltage LED lighting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201378883Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221170A (en) * | 2010-04-14 | 2011-10-19 | 三星Led株式会社 | Lamp body unit applied in lighting device and lighting device |
| CN103249199A (en) * | 2012-02-03 | 2013-08-14 | 深圳市比格利电源科技有限公司 | LEDbulb lamp |
| CN105706533A (en) * | 2016-01-31 | 2016-06-22 | 冯旋宇 | LED energy-saving control method and system |
| RU2733513C1 (en) * | 2019-12-25 | 2020-10-05 | Михаил Альфредович Альтшулер | Street and road led lamp |
-
2009
- 2009-03-23 CN CN200920053126U patent/CN201378883Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221170A (en) * | 2010-04-14 | 2011-10-19 | 三星Led株式会社 | Lamp body unit applied in lighting device and lighting device |
| CN102221170B (en) * | 2010-04-14 | 2014-05-14 | 三星电子株式会社 | Lamp body unit applied in lighting device and lighting device |
| CN103249199A (en) * | 2012-02-03 | 2013-08-14 | 深圳市比格利电源科技有限公司 | LEDbulb lamp |
| CN105706533A (en) * | 2016-01-31 | 2016-06-22 | 冯旋宇 | LED energy-saving control method and system |
| RU2733513C1 (en) * | 2019-12-25 | 2020-10-05 | Михаил Альфредович Альтшулер | Street and road led lamp |
| RU2733513C9 (en) * | 2019-12-25 | 2021-02-16 | Михаил Альфредович Альтшулер | Street or road led luminaire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100106 Termination date: 20180323 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |