CN204652745U - A kind of constant current driver circuit for LED - Google Patents
A kind of constant current driver circuit for LED Download PDFInfo
- Publication number
- CN204652745U CN204652745U CN201520347713.5U CN201520347713U CN204652745U CN 204652745 U CN204652745 U CN 204652745U CN 201520347713 U CN201520347713 U CN 201520347713U CN 204652745 U CN204652745 U CN 204652745U
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- led
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
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Abstract
The utility model discloses a kind of constant current driver circuit for LED, comprise transformer W, rectifier bridge T, chip IC 1, resistance R1 and electric capacity C1, one end of the winding N1 of described transformer W connects anode and the 220V alternating current of diode D1, the negative electrode of diode D1 connects the negative electrode of diode D2, the plus earth of diode D2, the other end of the winding N1 of transformer W connects the other end of 220V alternating current.The utility model constant current driver circuit for LED is at the armature winding of transformer two diodes in parallel, the peak voltage clamper that transformer leakage inductance can be produced is to safety value, and ringing voltage of decaying, circuit adopts MBI1802 chip to realize constant current driving simultaneously, suppress great power LED forward voltage to change and the current fluctuation that causes simultaneously, therefore have that structure is simple, stable output, control advantage accurately.
Description
Technical field
The utility model relates to a kind of control circuit, specifically a kind of constant current driver circuit for LED.
Background technology
LED is acknowledged as green forth generation light source, is a kind of solid cold light source, has the plurality of advantages such as efficient, life-span length, safety and environmental protection, volume are little, high reliability, fast response time.Reach same illuminating effect at present, the power consumption of LED is approximately 1/10 of incandescent lamp, 1/2 of fluorescent lamp, and LED drive circuit is concerning most important LED.Current most LED drive circuit many uses transformer isolation mode, Transformer Winding can produce peak voltage when being coupled, thus affects the stability of output voltage.
Utility model content
The purpose of this utility model is to provide the constant current driver circuit for LED that a kind of structure is simple, cost of manufacture is low, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of constant current driver circuit for LED, comprise transformer W, rectifier bridge T, chip IC 1, resistance R1 and electric capacity C1, one end of the winding N1 of described transformer W connects anode and the 220V alternating current of diode D1, the negative electrode of diode D1 connects the negative electrode of diode D2, the plus earth of diode D2, the other end of the winding N1 of transformer W connects the other end of 220V alternating current, the two ends of the winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, the port 2 of rectifier bridge T connects the pin 1 of electric capacity C1 and chip IC 1, the pin 2 contact resistance R3 of chip IC 1, electric capacity C2, the anode of diode D3, the pin 1 of chip IC 1 and the port 4 of rectifier bridge T, the pin 3 contact resistance R1 of chip IC 1, resistance R2 and electric capacity C2, the other end of resistance R1 connects the negative electrode of diode D3 and the pin 8 of chip IC 2, the other end of resistance R3 connects the pin 2 of chip IC 2, the other end of resistance R2 connects the anode of LED group H and diode D4, the negative electrode of diode D4 connects the other end of LED group H and the pin 5 of chip IC 2.
As preferred version of the present utility model: the model of described chip IC 1 is LM7812.
As preferred version of the present utility model: the model of described chip IC 2 is MBI1802.
Compared with prior art, the beneficial effects of the utility model are: the utility model constant current driver circuit for LED is at the armature winding of transformer two diodes in parallel, the peak voltage clamper that transformer leakage inductance can be produced is to safety value, and ringing voltage of decaying, circuit adopts MBI1802 chip to realize constant current driving simultaneously, suppress great power LED forward voltage to change and the current fluctuation that causes simultaneously, therefore have that structure is simple, stable output, control advantage accurately.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of constant current driver circuit for LED.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of constant current driver circuit for LED, comprise transformer W, rectifier bridge T, chip IC 1, resistance R1 and electric capacity C1, one end of the winding N1 of described transformer W connects anode and the 220V alternating current of diode D1, the negative electrode of diode D1 connects the negative electrode of diode D2, the plus earth of diode D2, the other end of the winding N1 of transformer W connects the other end of 220V alternating current, the two ends of the winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, the port 2 of rectifier bridge T connects the pin 1 of electric capacity C1 and chip IC 1, the pin 2 contact resistance R3 of chip IC 1, electric capacity C2, the anode of diode D3, the pin 1 of chip IC 1 and the port 4 of rectifier bridge T, the pin 3 contact resistance R1 of chip IC 1, resistance R2 and electric capacity C2, the other end of resistance R1 connects the negative electrode of diode D3 and the pin 8 of chip IC 2, the other end of resistance R3 connects the pin 2 of chip IC 2, the other end of resistance R2 connects the anode of LED group H and diode D4, the negative electrode of diode D4 connects the other end of LED group H and the pin 5 of chip IC 2.
The model of described chip IC 1 is LM7812.The model of described chip IC 2 is MBI1802.
Operation principle of the present utility model is: 220V alternating current is by giving drive circuitry after transformer W step-down, rectifier bridge T rectification, electric capacity C1 filtering and 7812 three terminal regulator device voltage stabilizings, the peak voltage clamper that transformer leakage inductance can produce by diode D1 and diode D2 is to safety value, can be by voltage stabilizing didoe D3 the driving voltage that chip IC 1 provides stable, now decided primarily of reference voltage level and chip IC 1 operating voltage by the electric current of LED group H.Meanwhile, at LED group two ends, a zener in parallel, can provide open-circuit-protection for LED.To drive white light LEDs with parallel way, each white light LEDs must be connected a steady resistance, for avoiding occurring difference by its electric current, these resistance also can consumed power, reduce circuit efficiency, so adopt the LED group that series system can drive multiple LED to form, circuit is at the armature winding of transformer two diodes in parallel, the peak voltage clamper that transformer leakage inductance can be produced is to safety value, and ringing voltage of decaying, circuit adopts MBI1802 chip to realize constant current driving simultaneously, suppress great power LED forward voltage to change and the current fluctuation that causes simultaneously, therefore there is structure simple, stable output, control advantage accurately.
Claims (3)
1. a constant current driver circuit for LED, comprise transformer W, rectifier bridge T, chip IC 1, resistance R1 and electric capacity C1, it is characterized in that, one end of the winding N1 of described transformer W connects anode and the 220V alternating current of diode D1, the negative electrode of diode D1 connects the negative electrode of diode D2, the plus earth of diode D2, the other end of the winding N1 of transformer W connects the other end of 220V alternating current, the two ends of the winding N2 of transformer W connect the port one of rectifier bridge T and the port 3 of rectifier bridge T respectively, the port 2 of rectifier bridge T connects the pin 1 of electric capacity C1 and chip IC 1, the pin 2 contact resistance R3 of chip IC 1, electric capacity C2, the anode of diode D3, the pin 1 of chip IC 1 and the port 4 of rectifier bridge T, the pin 3 contact resistance R1 of chip IC 1, resistance R2 and electric capacity C2, the other end of resistance R1 connects the negative electrode of diode D3 and the pin 8 of chip IC 2, the other end of resistance R3 connects the pin 2 of chip IC 2, the other end of resistance R2 connects the anode of LED group H and diode D4, the negative electrode of diode D4 connects the other end of LED group H and the pin 5 of chip IC 2.
2. a kind of constant current driver circuit for LED according to claim 1, is characterized in that, the model of described chip IC 1 is LM7812.
3. a kind of constant current driver circuit for LED according to claim 1, is characterized in that, the model of described chip IC 2 is MBI1802.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520347713.5U CN204652745U (en) | 2015-05-27 | 2015-05-27 | A kind of constant current driver circuit for LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520347713.5U CN204652745U (en) | 2015-05-27 | 2015-05-27 | A kind of constant current driver circuit for LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204652745U true CN204652745U (en) | 2015-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520347713.5U Expired - Fee Related CN204652745U (en) | 2015-05-27 | 2015-05-27 | A kind of constant current driver circuit for LED |
Country Status (1)
| Country | Link |
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| CN (1) | CN204652745U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105828484A (en) * | 2016-05-18 | 2016-08-03 | 上海欧美拉光电股份有限公司 | Super energy-saving LED lamp system and rectifier circuit thereof |
| CN105828483A (en) * | 2016-05-18 | 2016-08-03 | 上海欧美拉光电股份有限公司 | LED lamp system with high luminous efficiency |
| CN107632693A (en) * | 2017-11-03 | 2018-01-26 | 郑州云海信息技术有限公司 | A kind of administration of power supply of server storage node |
-
2015
- 2015-05-27 CN CN201520347713.5U patent/CN204652745U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105828484A (en) * | 2016-05-18 | 2016-08-03 | 上海欧美拉光电股份有限公司 | Super energy-saving LED lamp system and rectifier circuit thereof |
| CN105828483A (en) * | 2016-05-18 | 2016-08-03 | 上海欧美拉光电股份有限公司 | LED lamp system with high luminous efficiency |
| CN107632693A (en) * | 2017-11-03 | 2018-01-26 | 郑州云海信息技术有限公司 | A kind of administration of power supply of server storage node |
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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: 20150916 Termination date: 20170527 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |