CN201708994U - Led constant-current source driving device - Google Patents
Led constant-current source driving device Download PDFInfo
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- CN201708994U CN201708994U CN2010202047067U CN201020204706U CN201708994U CN 201708994 U CN201708994 U CN 201708994U CN 2010202047067 U CN2010202047067 U CN 2010202047067U CN 201020204706 U CN201020204706 U CN 201020204706U CN 201708994 U CN201708994 U CN 201708994U
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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 LED constant-current source driving device, comprising an EMI circuit, a bridge type commutation filter circuit and a LED load circuit, wherein the input end of the EMI circuit is connected with an electric network and the output end of the EMI circuit is connected with the input end of the bridge type commutation filter circuit; also comprising a passive powder factor correction circuit, a pulse width modulation switch circuit, a constant-current source control circuit and an output power tube, wherein the output end of the bridge type commutation filter circuit is connected with the input end of the pulse width modulation switch circuit and the output end of the pulse width modulation switch circuit is connected with the input end of the constant-current source control circuit, the output end of the constant-current source control circuit is connected with the input end of the output power tube; the output end of the output power tube is connected with the input end of the LED load circuit; the passive powder factor correction circuit is respectively connected with the output end of the commutation filter circuit and the ground. The commercial power is directly rectified and decompressed and the non-separation topological structure is used to output the commercial power and the structure is simple the LED constant-current source driving device is universal for the large, middle power LED light source and easy to be popularized.
Description
Technical field
The utility model provides a kind of LED constant-current source drive unit, particularly a kind of constant current regulated power supply device that is applied to electronic technology field.
Background technology
LED (Light Emitting Diode), it is light-emitting diode, it is a kind of solid-state semiconductor device, can directly be converted into light to electricity, it is little as a kind of volume, power consumption is low, long service life, high brightness, low in calories, environmental protection and robust light source are widely used in the display unit of a new generation.
Mainly are driven by it the influence of electric current in the luminosity of LED and useful life, best LED type of drive should be that constant-current source drives.A kind of drive source is provided in the market, and as the ONNN power supply, its application as drive source is very extensive, and has used the pressure-stabilizing constant flow technology, solves the needs of LED load, and its main drawback is:
(1) structure of described technology is too complicated, and components and parts are many, and volume is big, debugs loaded down with trivial details;
(2) described technology only is applicable to the needs of small-power (8-10W), can't satisfy the user demand of big or middle power LED light source;
(3) described Technology Need by current rectifying and wave filtering circuit and EMI circuit etc., has increased the cost of product by power frequency supply in the input front end otherwise designed greatly, is not easy to popularize.
The semi-bridge alternation circuit has been adopted in another kind of widely used design, prime is used IC chip NCP1015, make structure simplify to some extent, but output adopts isolated structure, coupling transformer wherein all causes burden for loading in cost and the design of different capacity, and parameter adjustment need be confirmed through complicated calculating and test.
The utility model content
The technical problem that the utility model solves is, because the technical pattern of LED drive source is too complicated, components and parts are too much and volume is big, and the production debugging that causes is loaded down with trivial details, can't satisfy the user demand of big or middle power LED light source, and product cost is higher, design is complicated, difficulty of parameter tuning, the problem that is not easy to popularize etc., and then a kind of LED constant-current source drive unit of optimal design is provided.
The technical scheme that the utility model adopted is, a kind of LED constant-current source drive unit, comprise the EMI circuit that is used for the various interference signals of filtering, bridge rectifier filter circuit and LED load circuit, the input and the electrical network of described EMI circuit join, the output of EMI circuit and bridge rectifier filter circuit input join, described LED constant-current source drive unit also comprises passive power factor correcting circuit, the pulse width modulating switch circuit, the power output pipe that is used to monitor and adjust the constant current source control circuit of output current and is used to provide bearing power, described bridge rectifier filter circuit output and pulse width modulating switch circuit input end join, pulse width modulating switch circuit output end and constant current source control circuit input join, constant current source control circuit output and power output pipe input join, power output pipe output and LED load circuit input join, passive power factor correcting circuit one is terminated at the bridge rectifier filter circuit output, passive power factor correcting circuit other end ground connection.
Preferably, described constant current source control circuit adopts IC chip MT7910.
Preferably, described passive power factor correcting circuit comprises RS1J type diode D1, D2, D3,22uF/250V type electrochemical capacitor C3, C4 and resistance R 2, anodal and the electrochemical capacitor C4 negative pole difference ground connection of diode D3, diode D3 negative pole connects diode D1 negative pole and resistance R 2 one ends, and resistance R 2 other ends connect electrochemical capacitor C4 positive pole, and diode D2 negative pole connects electric capacity electrolysis C3 positive pole, electrochemical capacitor C3 negative pole connects diode D1 positive pole, the anodal electrochemical capacitor C4 positive pole that connects of diode D2.
Preferably, described pulse width modulating switch circuit comprises resistance R 5, R6, triode Q1 and electrochemical capacitor C6, and the collector electrode of triode is connected by resistance R 5 with emitter, transistor emitter be connected to resistance R 6 one ends after resistance R 5 is connected, resistance R 6 other ends are connected with electrochemical capacitor C6 is anodal.
Preferably, the triode Q1 of described pulse width modulating switch circuit is the middle pressure triode of power 0.6～1W.
Preferably, described power output pipe comprises diode D5, resistance R 8 and field effect transistor Q2, and diode D5 negative pole is connected with resistance R 8 one ends, and diode D5 is anodal to be connected with resistance R 8 other ends and to be connected to field effect transistor Q2 grid.
Preferably, described resistance R 8 is the resistance less than 5 ohm.
Preferably, described LED load circuit comprises diode D4, inductance L 3, electrochemical capacitor C5 and resistance R 3, R4, diode D4 negative pole connection electrochemical capacitor C5 positive pole, diode D4 is anodal to connect electrochemical capacitor C5 negative poles by inductance L 3, in parallel with electrochemical capacitor C5 after resistance R 3, the R4 series connection.
Preferably, described EMI circuit comprises frequency converter RZ, capacitor C 1, inductance L 1, L2.
Preferably, described bridge rectifier filter circuit comprises 4 DB107 type diodes, and described diode full-bridge connects.
Adopt technical scheme provided by the utility model, advantage in conjunction with prior art, and in the direct rectification step-down of input employing line voltage mode, non-isolated topological structure, simplified structure are adopted in output, reduce components and parts, be easy to debugging, have universality, the load of high-power LED connection in series-parallel combination in being suitable for driving for the led light source of big or middle power, and cost is lower, is easy to popularize.
Description of drawings
Fig. 1 is a circuit structure diagram of the present utility model.
Wherein, 1 is the EMI circuit; 2 is bridge rectifier filter circuit; 3 is passive power factor correcting circuit; 4 is the pulse width modulating switch circuit; 5 is constant current source control circuit; 6 is the power output pipe; 7 is the LED load circuit.
Embodiment
Below in conjunction with embodiment the utility model is described in further detail, but protection range of the present utility model is not limited to this.
As shown in Figure 1, the utility model relates to a kind of LED constant-current source drive unit, comprise the EMI circuit 1 that is used for the various interference signals of filtering, bridge rectifier filter circuit 2 and LED load circuit 7, the input and the electrical network of described EMI circuit 1 join, the output of EMI circuit 1 and bridge rectifier filter circuit 2 inputs join, described LED constant-current source drive unit also comprises passive power factor correcting circuit 3, pulse width modulating switch circuit 4, the power output pipe 6 that is used to monitor and adjust the constant current source control circuit 5 of output current and is used to provide bearing power, described bridge rectifier filter circuit 2 outputs and pulse width modulating switch circuit 4 inputs join, pulse width modulating switch circuit 4 outputs and constant current source control circuit 5 inputs join, constant current source control circuit 5 outputs and power output pipe 6 inputs join, power output pipe 6 outputs and LED load circuit 7 inputs join, passive power factor correcting circuit 3 one is terminated at bridge rectifier filter circuit 2 outputs, passive power factor correcting circuit 3 other end ground connection.
Described constant current source control circuit 5 adopts IC chip MT7910.
Described passive power factor correcting circuit 3 comprises RS1J type diode D1, D2, D3,22uF/250V type electrochemical capacitor C3, C4 and resistance R 2, anodal and the electrochemical capacitor C4 negative pole difference ground connection of diode D3, diode D3 negative pole connects diode D1 negative pole and resistance R 2 one ends, resistance R 2 other ends connect electrochemical capacitor C4 positive pole, diode D2 negative pole connects electric capacity electrolysis C3 positive pole, and electrochemical capacitor C3 negative pole connects diode D1 positive pole, the anodal electrochemical capacitor C4 positive pole that connects of diode D2.
Described pulse width modulating switch circuit 4 comprises resistance R 5, R6, triode Q1 and electrochemical capacitor C6, the collector electrode of triode is connected by resistance R 5 with emitter, transistor emitter be connected to resistance R 6 one ends after resistance R 5 is connected, resistance R 6 other ends are connected with electrochemical capacitor C6 is anodal.
The triode Q1 of described pulse width modulating switch circuit 4 is the middle pressure triode of power 0.6～1W.
Described power output pipe 6 comprises diode D5, resistance R 8 and field effect transistor Q2, and diode D5 negative pole is connected with resistance R 8 one ends, and diode D5 is anodal to be connected with resistance R 8 other ends and to be connected to field effect transistor Q2 grid.
Described resistance R 8 is the resistance less than 5 ohm.
Described LED load circuit 7 comprises diode D4, inductance L 3, electrochemical capacitor C5 and resistance R 3, R4, diode D4 negative pole connect electrochemical capacitor C5 positive pole, diode D4 is anodal to connect electrochemical capacitor C5 negative pole by inductance L 3, in parallel with electrochemical capacitor C5 after resistance R 3, the R4 series connection.Wherein, diode D4 is the protection tube of field effect transistor, and electrochemical capacitor C5 is used for filtering, and inductance L 2 is for being used to ensure to the outputting inductance that load provides the continous-stable electric current.
Described EMI circuit 1 comprises frequency converter RZ, capacitor C 1, inductance L 1, L2.
Described bridge rectifier filter circuit 2 comprises 4 DB107 type diodes, and described diode full-bridge connects.
Claims (10)
1. LED constant-current source drive unit, comprise the EMI circuit that is used for the various interference signals of filtering, bridge rectifier filter circuit and LED load circuit, the input and the electrical network of described EMI circuit join, the output of EMI circuit and bridge rectifier filter circuit input join, it is characterized in that: described LED constant-current source drive unit also comprises passive power factor correcting circuit, the pulse width modulating switch circuit, the power output pipe that is used to monitor and adjust the constant current source control circuit of output current and is used to provide bearing power, described bridge rectifier filter circuit output and pulse width modulating switch circuit input end join, pulse width modulating switch circuit output end and constant current source control circuit input join, constant current source control circuit output and power output pipe input join, power output pipe output and LED load circuit input join, passive power factor correcting circuit one is terminated at the bridge rectifier filter circuit output, passive power factor correcting circuit other end ground connection.
2. LED constant-current source drive unit according to claim 1 is characterized in that: described constant current source control circuit adopts IC chip MT7910.
3. LED constant-current source drive unit according to claim 1, it is characterized in that: described passive power factor correcting circuit comprises RS1J type diode D1, D2, D3,22uF/250V type electrochemical capacitor C3, C4 and resistance R 2, anodal and the electrochemical capacitor C4 negative pole difference ground connection of diode D3, diode D3 negative pole connects diode D1 negative pole and resistance R 2 one ends, resistance R 2 other ends connect electrochemical capacitor C4 positive pole, diode D2 negative pole connects electric capacity electrolysis C3 positive pole, electrochemical capacitor C3 negative pole connects diode D1 positive pole, the anodal electrochemical capacitor C4 positive pole that connects of diode D2.
4. LED constant-current source drive unit according to claim 1, it is characterized in that: described pulse width modulating switch circuit comprises resistance R 5, R6, triode Q1 and electrochemical capacitor C6, the collector electrode of triode is connected by resistance R 5 with emitter, transistor emitter be connected to resistance R 6 one ends after resistance R 5 is connected, resistance R 6 other ends are connected with electrochemical capacitor C6 is anodal.
5. LED constant-current source drive unit according to claim 4 is characterized in that: the triode Q1 of described pulse width modulating switch circuit is the middle pressure triode of power 0.6～1W.
6. LED constant-current source drive unit according to claim 1, it is characterized in that: described power output pipe comprises diode D5, resistance R 8 and field effect transistor Q2, diode D5 negative pole is connected with resistance R 8 one ends, and diode D5 is anodal to be connected with resistance R 8 other ends and to be connected to field effect transistor Q2 grid.
7. LED constant-current source drive unit according to claim 6 is characterized in that: described resistance R 8 is the resistance less than 5 ohm.
8. LED constant-current source drive unit according to claim 1, it is characterized in that: described LED load circuit comprises diode D4, inductance L 3, electrochemical capacitor C5 and resistance R 3, R4, diode D4 negative pole connects electrochemical capacitor C5 positive pole, diode D4 is anodal to connect electrochemical capacitor C5 negative pole by inductance L 3, in parallel with electrochemical capacitor C5 after resistance R 3, the R4 series connection.
9. LED constant-current source drive unit according to claim 1 is characterized in that: described EMI circuit comprises frequency converter RZ, capacitor C 1, inductance L 1, L2.
10. LED constant-current source drive unit according to claim 1 is characterized in that: described bridge rectifier filter circuit comprises 4 DB107 type diodes, and described diode full-bridge connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202047067U CN201708994U (en) | 2010-05-26 | 2010-05-26 | Led constant-current source driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202047067U CN201708994U (en) | 2010-05-26 | 2010-05-26 | Led constant-current source driving device |
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| Publication Number | Publication Date |
|---|---|
| CN201708994U true CN201708994U (en) | 2011-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202047067U Expired - Fee Related CN201708994U (en) | 2010-05-26 | 2010-05-26 | Led constant-current source driving device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873746A (en) * | 2010-06-02 | 2010-10-27 | 杭州丽晶照明电器有限公司 | Constant current source driving circuit for medium and high power LED lamps |
| CN105375749A (en) * | 2015-12-15 | 2016-03-02 | 福州大学 | Resonant drive dissociation circuit for LED visible-light communication |
| CN108901100A (en) * | 2018-07-17 | 2018-11-27 | 浙江金来奥光电科技有限公司 | Multiple LED lamp beads are stablized with the constant-current supply drive system lighted |
-
2010
- 2010-05-26 CN CN2010202047067U patent/CN201708994U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873746A (en) * | 2010-06-02 | 2010-10-27 | 杭州丽晶照明电器有限公司 | Constant current source driving circuit for medium and high power LED lamps |
| CN105375749A (en) * | 2015-12-15 | 2016-03-02 | 福州大学 | Resonant drive dissociation circuit for LED visible-light communication |
| CN108901100A (en) * | 2018-07-17 | 2018-11-27 | 浙江金来奥光电科技有限公司 | Multiple LED lamp beads are stablized with the constant-current supply drive system lighted |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU LIJING OPTOELECTRONICS CO., LTD. Free format text: FORMER NAME: HANGZHOU LIJING LIGHTING CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 311199 Zhejiang province Hangzhou Yuhang District Nanyuan Street Highland Village Patentee after: Hangzhou Regent Au Optronics Co Address before: 311100, Yuhang District, Zhejiang City, Hangzhou province Linping Nanyuan Street Highland Village Patentee before: Hangzhou Lijing Lighting Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20170526 |