CN202475873U - LED (light emitting diode) energy-saving lamp circuit - Google Patents
LED (light emitting diode) energy-saving lamp circuit Download PDFInfo
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- CN202475873U CN202475873U CN 201220046744 CN201220046744U CN202475873U CN 202475873 U CN202475873 U CN 202475873U CN 201220046744 CN201220046744 CN 201220046744 CN 201220046744 U CN201220046744 U CN 201220046744U CN 202475873 U CN202475873 U CN 202475873U
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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 an LED (light emitting diode) energy-saving lamp circuit comprising a rectification filter circuit, a starting circuit, an oscillating circuit, a follow current circuit, a constant current control circuit and an output circuit, wherein the rectification filter circuit is connected with the starting circuit and the oscillating circuit respectively; the oscillating circuit is connected with the output circuit; the follow current circuit is connected with the oscillating circuit; and the constant current control circuit is connected with the starting circuit, the oscillating circuit and the output circuit. The LED energy-saving lamp circuit has the benefits of simple and compact structure, less elements, low manufacturing cost, stable performance, low energy consumption, high efficiency, safe and reliable work, long service life, extensive use, and constant current-controlled switch power.
Description
Technical field
The utility model relates to a kind of floodlight circuit, more specifically to a kind of LED energy-saving lamp circuit.
Background technology
Along with improving constantly of China's sustainable development of economy and living standards of the people, the demand of people's illumination light fixture also increases fast, simultaneously, also payes attention to the quality and the effect of lighting more.The LED electricity-saving lamp is as a kind of new type light source, has that long service life, energy consumption are low, the advantage of hygienic environment-protecting, and the scope of application enlarges rapidly.But the driving power majority of the existing LED electricity-saving lamp of selling on the market is used for low pressure, if be used for the 220v alternating current, need add ballast, and bulky complex uses inconvenience.Can be used for 220v alternating current majority is capacitance-resistance current limliting power supply or resistance current limliting power drives, no constant current function, though simple, efficient is low, and unstable properties can not adapt to the requirement of LED electricity-saving lamp.
Summary of the invention
The purpose of the utility model is the deficiency that overcomes prior art, and the LED energy-saving lamp circuit of a kind of efficient height, stable performance is provided.
The purpose of the utility model is to be achieved through following technical proposals:
A kind of LED energy-saving lamp circuit comprises current rectifying and wave filtering circuit, start-up circuit, oscillating circuit, freewheeling circuit, constant-current control circuit and output circuit; Said current rectifying and wave filtering circuit is connected with oscillating circuit with start-up circuit respectively, and oscillating circuit is connected with output circuit, and freewheeling circuit is connected with oscillating circuit, constant-current control circuit respectively with start-up circuit, oscillating circuit is connected with output circuit.
Said current rectifying and wave filtering circuit is made up of with filter capacitor C1 bridge rectifier D 1, and 1 pin of bridge rectifier D 1 is connected with negative pole with the positive pole of filter capacitor C1 respectively with 4 pin; Said start-up circuit is made up of starting resistance R1; Said oscillating circuit is made up of switching tube Q1, switch transformer T1 and feedback resistance R2, and the e utmost point of switching tube Q1 is connected with 1 pin of switch transformer T1, and the end of feedback resistance R2 is connected with the b utmost point of switching tube Q1, and the other end is connected with 2 pin of switch transformer T1; Said freewheeling circuit is made up of sustained diode 2; Said constant-current control circuit is made up of signal amplifying triode Q3, control triode Q2, sample resistance R3; The b utmost point of control triode Q2 is connected with the c utmost point of signal amplifying triode Q3, and the two ends of sample resistance R3 are connected with the b utmost point with the e utmost point of signal amplifying triode Q3 respectively; Said output circuit is made up of filter capacitor C2 and load LED1.
The beneficial effect of the utility model is:
1, simple and compact for structure, components and parts are few, cost of manufacture is low.
2, Switching Power Supply adds constant current control, and the job requirement of LED electricity-saving lamp is satisfied in stable performance.
3, energy consumption is low, and efficient is high, and is safe and reliable, long service life.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the circuit theory diagrams of the utility model.
Be labeled as among the figure: 1-current rectifying and wave filtering circuit, 2-start-up circuit, 3-oscillating circuit, 4-freewheeling circuit, 5-constant-current control circuit, 6-output circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail:
The LED energy-saving lamp circuit block diagram of the utility model is as shown in Figure 1, comprises current rectifying and wave filtering circuit 1, start-up circuit 2, oscillating circuit 3, freewheeling circuit 4, constant-current control circuit 5 and output circuit 6; Said current rectifying and wave filtering circuit 1 is connected with oscillating circuit 3 with start-up circuit 2 respectively, and oscillating circuit 3 is connected with output circuit 6, and freewheeling circuit 4 is connected with oscillating circuit 3, and constant-current control circuit 5 is connected with start-up circuit 2, oscillating circuit 3 and output circuit 6 respectively.
The circuit theory diagrams of the utility model are as shown in Figure 2, and said current rectifying and wave filtering circuit 1 is made up of with filter capacitor C1 bridge rectifier D 1; Said start-up circuit 2 is made up of starting resistance R1; Said oscillating circuit 3 is made up of switching tube Q1, switch transformer T1 and feedback resistance R2; Said freewheeling circuit 4 is made up of sustained diode 2; Said constant-current control circuit 5 is made up of signal amplifying triode Q3, control triode Q2, sample resistance R3; Said output circuit 6 is made up of filter capacitor C2 and load LED1.Circuit connects:
2 pin of bridge rectifier D 1 are connected with an input of civil power, and 3 pin of bridge rectifier D 1 are connected with another input of civil power; 1 pin of bridge rectifier D 1 is connected with the positive pole of filter capacitor C1, the end of starting resistance R1 and the c utmost point of switching tube Q1 respectively; The e utmost point of 4 pin of bridge rectifier D 1, the negative pole of filter capacitor C1, control triode Q2, the negative pole of LED1, the negative pole of filter capacitor C2, the anodal of sustained diode 2 all are connected with ground; The other end of starting resistance R1 is connected with the b utmost point of switching tube Q1, the end of feedback resistance R2 and the c utmost point of control triode Q2 respectively; The e utmost point of switching tube Q1 is connected with the negative pole of sustained diode 2 and 1 pin of switch transformer T1 respectively; 2 pin of switch transformer T1 are connected with the other end of feedback resistance R2; 3 pin of switch transformer T1 are connected with the end of sample resistance R3, the positive pole of filter capacitor C2 and the e utmost point of signal amplifying triode Q3 respectively; The c utmost point of signal amplifying triode Q3 is connected with the b utmost point of control triode Q2; The b utmost point of signal amplifying triode Q3 is connected with the other end of sample resistance R3 and the positive pole of LED1 respectively.
The operation principle of this LED energy-saving lamp circuit:
220 volts of civil powers obtain the collector electrode of level and smooth direct current one tunnel up to switching tube Q1 after the rectification of bridge rectifier D 1 and filter capacitor C1 filtering; One the tunnel arrives the base stage deactivation oscillating circuit of switching tube Q1 after starting resistance R1 shunting; Switching tube Q1 has faint electric current to flow out from emitter after starting resistance R1 starts, and this electric current flows into 1 pin of switch transformer T1, and flows out from its 3 pin; 1 pin of switch transformer T1 and 3 pin are elementary winding; 1 pin and 2 pin are the feedback winding, and this moment, the feedback winding of switch transformer T1 produced feedback current through the base stage formation positive feedback that feedback resistance R2 is input to switching tube Q1, made the rapid saturation conduction of switching tube Q1; The electric current of elementary winding of switch transformer T1 flow through behind the switching tube Q1 saturation conduction by increasing to maximum for a short time; This moment, current changing rate reduced, and also ended rapidly so the feedback current that the feedback winding of switch transformer T1 produces also reduces and oppositely make switching tube Q1 withdraw from saturation conduction, thereby accomplished a cycle of oscillation.Next switching tube Q1 gets into next cycle of oscillation after starting resistance R1 starts.Switching tube Q1 by the time switch transformer T1 energy that retains through sustained diode 2 afterflows after the elementary winding of switch transformer T1 be defeated by load LED1 and be released.The pulse current that flows out from 3 pin of switch transformer T1 flows to sample resistance R3 after filter capacitor C2 filtering; After sample resistance R3 takes out the signal that output current changes, export to load LED1 from its other end, load LED1 is made up of one or several light-emitting diodes.The signal that takes out from sample resistance R3 arrives the base stage that controls triode Q2 after signal amplifying triode Q3 amplifies, thereby reaches the purpose of constant current output by control triode Q2 control switch pipe Q1.
The advantage that in the circuit of the utility model switch transformer T1 has been placed on the back of switching tube Q1 is: saved the afterflow winding; Switching tube Q1 do not bear its by the time switch transformer T1 high pressure that produces, make switching tube Q1 by the time switch transformer T1 energy that retains fully discharge to load LED1.
Claims (2)
1. a LED energy-saving lamp circuit is characterized in that: comprise current rectifying and wave filtering circuit, start-up circuit, oscillating circuit, freewheeling circuit, constant-current control circuit and output circuit; Said current rectifying and wave filtering circuit is connected with oscillating circuit with start-up circuit respectively, and oscillating circuit is connected with output circuit, and freewheeling circuit is connected with oscillating circuit, constant-current control circuit respectively with start-up circuit, oscillating circuit is connected with output circuit.
2. LED energy-saving lamp circuit according to claim 1 is characterized in that: said current rectifying and wave filtering circuit is made up of with filter capacitor C1 bridge rectifier D 1, and 1 pin of bridge rectifier D 1 is connected with negative pole with the positive pole of filter capacitor C1 respectively with 4 pin; Said start-up circuit is made up of starting resistance R1; Said oscillating circuit is made up of switching tube Q1, switch transformer T1 and feedback resistance R2, and the e utmost point of switching tube Q1 is connected with 1 pin of switch transformer T1, and the end of feedback resistance R2 is connected with the b utmost point of switching tube Q1, and the other end is connected with 2 pin of switch transformer T1; Said freewheeling circuit is made up of sustained diode 2; Said constant-current control circuit is made up of signal amplifying triode Q3, control triode Q2, sample resistance R3; The b utmost point of control triode Q2 is connected with the c utmost point of signal amplifying triode Q3, and the two ends of sample resistance R3 are connected with the b utmost point with the e utmost point of signal amplifying triode Q3 respectively; Said output circuit is made up of filter capacitor C2 and load LED1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220046744 CN202475873U (en) | 2012-02-12 | 2012-02-12 | LED (light emitting diode) energy-saving lamp circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220046744 CN202475873U (en) | 2012-02-12 | 2012-02-12 | LED (light emitting diode) energy-saving lamp circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202475873U true CN202475873U (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220046744 Expired - Fee Related CN202475873U (en) | 2012-02-12 | 2012-02-12 | LED (light emitting diode) energy-saving lamp circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202475873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298204A (en) * | 2013-04-22 | 2013-09-11 | 厦门通士达照明有限公司 | Silicon controlled dimming LED lamp driver with open circuit protection function |
-
2012
- 2012-02-12 CN CN 201220046744 patent/CN202475873U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298204A (en) * | 2013-04-22 | 2013-09-11 | 厦门通士达照明有限公司 | Silicon controlled dimming LED lamp driver with open circuit protection function |
| CN103298204B (en) * | 2013-04-22 | 2015-08-12 | 厦门通士达照明有限公司 | With the controllable silicon light modulation LED lamp driver of open-circuit-protection |
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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: 20121003 Termination date: 20150212 |
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| EXPY | Termination of patent right or utility model |