CN201821554U - LED energy-saving lamp drive circuit - Google Patents
LED energy-saving lamp drive circuit Download PDFInfo
- Publication number
- CN201821554U CN201821554U CN201020545051XU CN201020545051U CN201821554U CN 201821554 U CN201821554 U CN 201821554U CN 201020545051X U CN201020545051X U CN 201020545051XU CN 201020545051 U CN201020545051 U CN 201020545051U CN 201821554 U CN201821554 U CN 201821554U
- Authority
- CN
- China
- Prior art keywords
- circuit
- led
- saving lamp
- current
- lamp drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses an LED energy-saving lamp driving circuit, which comprises a voltage reduction circuit, a rectification circuit, a voltage stabilizing circuit and a current stabilizing circuit. An input end of the voltage reduction circuit is connected with a mains supply, an output end of the voltage reduction circuit is successively connected with the rectification circuit, the voltage stabilizing circuit and the current stabilizing circuit, and an output end of the current stabilizing circuit is connected with an LED. The LED energy-saving lamp driving circuit has the advantages of simple circuit, fewer elements, low cost, stable current, capability of meeting work requirements of the LED and the like, does not have switch electromagnetic interference, has power factor of 0.4 to 0.5, achieves efficiency of 80% to 90%, and is suitable for batch production.
Description
Technical field
The present invention relates to a kind of LED electricity-saving lamp drive circuit.
Background technology
The appearance of white light LEDs for general lighting provides new light source, is pointed out developing direction, and the power consumption of LED electricity-saving lamp has only 1/3～1/5 of fluorescent tube electricity-saving lamp, and popularizing in a large number of LED electricity-saving lamp is imperative.
The operating characteristic of LED requires that more stable operating current is arranged, and existing led drive circuit generally adopts constant current IC, and cost height, complex process are unfavorable for reducing manufacturing cost, is unfavorable for producing in enormous quantities.The led circuit that adopts resistance-capacitance depressurization to drive is also arranged at present on the market, but because line voltage instability, therefore the electric current of output produces bigger fluctuation with the variation of supply power voltage, thereby produce flicker when causing LED work, can cause the LED light decay too fast on the one hand, power factor (PF) is low on the other hand, light efficiency is low.
Summary of the invention
The drive circuit that the purpose of this invention is to provide a kind of LED electricity-saving lamp is simplified existing drive circuit, reduces element, is reduced cost, to be fit to batch process.
The present invention realizes above-mentioned purpose like this:
LED electricity-saving lamp drive circuit, comprise reduction voltage circuit, rectification circuit, voltage stabilizing circuit and current stabilization circuit, the reduction voltage circuit input is electrically connected with the city, and the reduction voltage circuit output connects rectification circuit, voltage stabilizing circuit and current stabilization circuit successively, and the current stabilization circuit output is connected with LED.
As improvement of the technical scheme, described current stabilization circuit is made up of triode, current sampling resistor and current-limiting resistance, described current sampling resistor is connected with LED, the base stage of triode is connected in current sampling resistor high potential one end, is connected to the output of rectification circuit or voltage stabilizing circuit after the collector electrode of triode or the emitter series limiting resistor.
As improvement of the technical scheme, described reduction voltage circuit is the resistance-capacitance depressurization circuit, by being serially connected with rectification circuit input end after dropping resistor and the decompression capacitor parallel connection.
As improvement of the technical scheme, described rectification circuit connects filter capacitor by bridge rectifier and output and forms.
As improvement of the technical scheme, voltage stabilizing circuit is made up of diode that is serially connected with rectification circuit output end and electrochemical capacitor.
The invention has the beneficial effects as follows: this drive circuit has that circuit is simple, element is few, cost is low, current stabilization can satisfy advantages such as LED job requirement, and does not have the switch electromagnetic interference, and power factor (PF) 0.4～0.5, efficient reach 80～90%, is fit to produce in batches.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified:
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
With reference to Fig. 1 and Fig. 2, LED electricity-saving lamp drive circuit comprises reduction voltage circuit, rectification circuit, voltage stabilizing circuit and current stabilization circuit, and the reduction voltage circuit input is electrically connected with the city, the reduction voltage circuit output connects rectification circuit, voltage stabilizing circuit and current stabilization circuit successively, and the current stabilization circuit output is connected with LED.
Wherein reduction voltage circuit is the resistance-capacitance depressurization circuit, by being serially connected with rectification circuit input end after dropping resistor R1 and the decompression capacitor C1 parallel connection.Described rectification circuit connects filter capacitor C2 by bridge rectifier D 1 and output and forms.Current stabilization circuit is made up of triode Q1, current sampling resistor R3 and current-limiting resistance R2, described current sampling resistor R3 connects with LED, the base stage of triode Q1 is connected in current sampling resistor R3 high potential one end, is connected to the output of rectification circuit or voltage stabilizing circuit behind the collector electrode of triode Q1 or the emitter series limiting resistor R2.Voltage stabilizing circuit is made up of diode D2 that is serially connected with rectification circuit output end and electrochemical capacitor C3.This drive circuit has that circuit is simple, element is few, cost is low, current stabilization can satisfy advantages such as LED job requirement, and does not have the switch electromagnetic interference, and power factor (PF) 0.4～0.5, efficient reach 80～90%, is fit to produce in batches.
Describe operation principle of the present utility model and process below in detail:
Obtain the lower alternating current of voltage behind the alternating current process resistance-capacitance depressurization circuit of 220V, can determine operating voltage, calculate the parameter of dropping resistor R1 and decompression capacitor C1 then according to the LED quantity of LED electricity-saving lamp series connection.Step-down is after rectification circuit obtains Rectified alternating current and filters high order harmonic component, and the electrochemical capacitor C3 by voltage stabilizing circuit carries out filtering acquisition galvanic current to pulsating current then.During the work of LED electricity-saving lamp, the flow through current sampling resistor of LED and current stabilization circuit of electric current, if supply power voltage raises, electric current by LED and current sampling resistor increases, just the dividing potential drop of current sampling resistor raises, according to the operating characteristic of triode Q1, along with the rising of base voltage, the collector electrode of the triode Q1 that flows through and the also corresponding increase of the electric current of emitter; Opposite when supply power voltage reduces, the electric current of the reduction of triode Q1 base voltage, collector electrode and emitter.So just can make LED obtain stable operating current.
Claims (5)
1.LED electricity-saving lamp drive circuit, it is characterized in that: comprise reduction voltage circuit, rectification circuit, voltage stabilizing circuit and current stabilization circuit, the reduction voltage circuit input is electrically connected with the city, and the reduction voltage circuit output connects rectification circuit, voltage stabilizing circuit and current stabilization circuit successively, and the current stabilization circuit output is connected with LED.
2. LED electricity-saving lamp drive circuit according to claim 1, it is characterized in that: described current stabilization circuit is made up of triode (Q1), current sampling resistor (R3) and current-limiting resistance (R2), described current sampling resistor (R3) is connected with LED, the base stage of triode (Q1) is connected in current sampling resistor (R3) high potential one end, is connected to the output of rectification circuit or voltage stabilizing circuit after the collector electrode of triode (Q1) or the emitter series limiting resistor (R2).
3. LED electricity-saving lamp drive circuit according to claim 1 is characterized in that: described reduction voltage circuit is the resistance-capacitance depressurization circuit, by being serially connected with rectification circuit input end after dropping resistor (R1) and decompression capacitor (C1) parallel connection.
4. LED electricity-saving lamp drive circuit according to claim 1 is characterized in that: described rectification circuit connects filter capacitor (C2) by bridge rectifier (D1) and output and forms.
5. LED electricity-saving lamp drive circuit according to claim 1 is characterized in that: voltage stabilizing circuit is made up of diode that is serially connected with rectification circuit output end (D2) and electrochemical capacitor (C3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020545051XU CN201821554U (en) | 2010-09-21 | 2010-09-21 | LED energy-saving lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020545051XU CN201821554U (en) | 2010-09-21 | 2010-09-21 | LED energy-saving lamp drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201821554U true CN201821554U (en) | 2011-05-04 |
Family
ID=43919495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020545051XU Expired - Fee Related CN201821554U (en) | 2010-09-21 | 2010-09-21 | LED energy-saving lamp drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201821554U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612210A (en) * | 2012-02-06 | 2012-07-25 | 陈国富 | Novel LED (light emitting diode) illuminating component with constant-current, constant-voltage and protection functions |
| CN102709999A (en) * | 2012-06-12 | 2012-10-03 | 六盘水金星机电设备有限公司 | Energy-saving charger |
| CN103167661A (en) * | 2011-12-08 | 2013-06-19 | 黄琪发 | High-energy-saving light-emitting diode (LED) ceiling lamp (plate lamp) |
| CN103407401A (en) * | 2013-08-23 | 2013-11-27 | 宁波市富来电子科技有限公司 | Constant current driving control system for rear view mirror steering lamp |
| CN104218794A (en) * | 2013-06-04 | 2014-12-17 | 尹万坡 | IND stabilized conversion circuit |
| CN106162992A (en) * | 2016-09-19 | 2016-11-23 | 江苏万邦微电子有限公司 | A kind of high-voltage driving circuit |
-
2010
- 2010-09-21 CN CN201020545051XU patent/CN201821554U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103167661A (en) * | 2011-12-08 | 2013-06-19 | 黄琪发 | High-energy-saving light-emitting diode (LED) ceiling lamp (plate lamp) |
| CN102612210A (en) * | 2012-02-06 | 2012-07-25 | 陈国富 | Novel LED (light emitting diode) illuminating component with constant-current, constant-voltage and protection functions |
| CN102709999A (en) * | 2012-06-12 | 2012-10-03 | 六盘水金星机电设备有限公司 | Energy-saving charger |
| CN102709999B (en) * | 2012-06-12 | 2015-01-21 | 六盘水金星机电设备有限公司 | Energy-saving charger |
| CN104218794A (en) * | 2013-06-04 | 2014-12-17 | 尹万坡 | IND stabilized conversion circuit |
| CN103407401A (en) * | 2013-08-23 | 2013-11-27 | 宁波市富来电子科技有限公司 | Constant current driving control system for rear view mirror steering lamp |
| CN103407401B (en) * | 2013-08-23 | 2016-04-13 | 宁波市富来电子科技有限公司 | A kind of back mirror steering indicating light constant current driving control system |
| CN106162992A (en) * | 2016-09-19 | 2016-11-23 | 江苏万邦微电子有限公司 | A kind of high-voltage driving circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101636021B (en) | LED constant current driving circuit | |
| CN201821554U (en) | LED energy-saving lamp drive circuit | |
| CN201180948Y (en) | A kind of energy-saving lamp | |
| CN103442481A (en) | Full-compatible low-ripper LED fluorescent lamp | |
| CN201893981U (en) | Light-emitting diode (LED) spotlight drive circuit | |
| CN202374531U (en) | White light-emitting diode (LED) drive circuit without electrolytic capacitor | |
| CN101754538B (en) | Adjustable photocontrol circuit of LED (light-emitting diode) lamp | |
| CN203136240U (en) | Wide-range constant-current LED power supply VCC drive circuit | |
| CN201904959U (en) | LED drive circuit with long service life | |
| CN201639821U (en) | Dimming control circuit of LED lamp | |
| CN203618188U (en) | Driving power supply of LED energy-saving lamp | |
| CN202425167U (en) | Light emitting diode (LED) driver | |
| CN204408707U (en) | A kind of 220V AC power LED adopting constant-current source circuit | |
| CN104918391A (en) | LED constant-voltage and constant-current driving power supply | |
| CN204795697U (en) | No ripple led lamp power supply circuit | |
| CN203645892U (en) | Constant current adjustable backlight circuit | |
| CN201851938U (en) | Indoor LED constant current lighting | |
| CN203671357U (en) | Novel light balance LED lamp | |
| CN205566709U (en) | Anti -interference power supply circuit of LED | |
| CN205137217U (en) | A light emitting diode (LED) spotlight | |
| CN203851349U (en) | Voltage-reducing and current-stabilizing circuit based on chip BP2833A | |
| CN203851312U (en) | LED lamp tube | |
| CN203233578U (en) | Light adjustable LED power supply | |
| CN203378125U (en) | High brightness LED flashlight with single battery | |
| CN202050571U (en) | Stabilized power supply for LED energy saving lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20110921 |