CN201440744U - LED constant-current controller - Google Patents
LED constant-current controller Download PDFInfo
- Publication number
- CN201440744U CN201440744U CN2009201522732U CN200920152273U CN201440744U CN 201440744 U CN201440744 U CN 201440744U CN 2009201522732 U CN2009201522732 U CN 2009201522732U CN 200920152273 U CN200920152273 U CN 200920152273U CN 201440744 U CN201440744 U CN 201440744U
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- China
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- circuit
- led
- current
- resistance
- inductance coil
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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)
Abstract
The utility model relates to an LED constant-current controller, comprising a filtering circuit, a current detection circuit and a voltage and current stabilization circuit; the filtering circuit comprises a one-phase bridge type rectifier filter, an inductance coil, an electrolysis capacitor C1 and a magnetic sheet type capacitor C2, and the electrolysis capacitor C1 and the magnetic sheet type capacitor C2 are connected on the filtering circuit in parallel; the current detection circuit is formed by connecting a resistance R1, a resistance R2, a resistance R3 and a resistance R4, and the current detection circuit is connected with the filtering circuit; the Vin end of the voltage and current stabilization circuit is connected with LED+, and the Mosc end of the voltage and current stabilization circuit is connected with the LED- by the resistances R6 and R3 and the inductance coil. The LED constant-current controller has the beneficial effects that: constant current can be output by a switch circuit after passing through the filtering circuit, the current detection circuit and the voltage and current stabilization circuit, so as to ensure the LED brightness to be uniform and be suitable for the field of road lamps, lawn lamps, energy-saving lamps and garden lamps.
Description
Technical field
The utility model relates to a kind of power-supply controller of electric, relates in particular to a kind of LED constant-current controller, belongs to power technique fields.
Background technology
LED (Light Emitting Diode), light-emitting diode, it is a kind of solid-state semiconductor device, can directly be converted into light to electricity.The heart of LED is a semi-conductive wafer, and an end of wafer is attached on the support, and an end is a negative pole, and the other end connects the positive pole of power supply, makes entire wafer by epoxy encapsulation.Semiconductor wafer is made up of three parts, and a part is a P type semiconductor, occupies an leading position in its hole, the inside, and the other end is a N type semiconductor, mainly is electronics here, the middle normally quantum well in 1 to 5 cycle.When electric current acted on this wafer by lead, electronics and hole will be pushed to quantum well, and electronics will send energy with the form of photon, the luminous principle of LED that Here it is then with hole-recombination in quantum well.And the light wavelength color of light just is by the material decision that forms the P-N knot.The operating voltage of LED lamp is between the 3.0-3.5 volt, electric current is at 20 milliamperes, and existing led circuit adopts be traditional be the interchange constant voltage power supply of adopting 220V, 50HZ, realize constant current by series resistance, consume a lot of energy on the resistance, make LED efficient can not fully play very much brightness irregularities, the easily broken ring of lamp is not suitable for the LED power supply.
The utility model content
The purpose of this utility model provides a kind of LED constant-current controller, is the constant voltage power supply with what overcome existing led circuit employing, realizes constant current by series resistance, and consumed energy on the resistance makes LED efficient not fully play very much, the deficiency of brightness irregularities.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of LED constant-current controller, comprise filter circuit, current detection circuit and voltage stabilization and current stabilization circuit, described filter circuit comprises a single-phase bridge rectification filter, inductance coil, electrolytic capacitor C1 and magnetic sheet capacitor C2, the positive terminal of described single-phase bridge rectification filter connects LED+, the negative pole end of single-phase bridge rectification filter by be connected into LED-after resistance R 3, metal-oxide-semiconductor and inductance coil are connected; Described electrolytic capacitor C1 and magnetic sheet capacitor C2 are connected in parallel on the described filter circuit; Described current detection circuit is connected to form by resistance R 1, R2, R3 and R4, and described current detection circuit is connected with filter circuit;
The Vin end of described voltage stabilization and current stabilization circuit is connected with LED+, the Mosc end of voltage stabilization and current stabilization circuit is connected LED-by R6, R3 with inductance coil, the LD of voltage stabilization and current stabilization circuit end is connected the negative pole of LED lamp through R3 after by the parallel connection of R8 and C5 with inductance coil, the vdd terminal of voltage stabilization and current stabilization circuit is in parallel with C4 again by the series connection of R7, R8, through R3 and the inductance coil LED-that is linked back, the PWM end of voltage stabilization and current stabilization circuit is connected into negative pole end VDD by resistance R 5 at last.
Beneficial effect described in the utility model is: behind filter circuit, current detection circuit and voltage stabilization and current stabilization circuit, make switching circuit export certain constant current, the brightness that guarantees LED is even, and the fields such as street lamp, Lawn lamp, electricity-saving lamp, garden lamp that are adapted at are extensive use of.
Description of drawings
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the circuit theory diagrams of the described a kind of LED constant-current controller of the utility model embodiment.
Embodiment
As shown in Figure 1, the described a kind of LED constant-current controller of the utility model embodiment, comprise filter circuit, current detection circuit and voltage stabilization and current stabilization circuit, described filter circuit comprises a single-phase bridge rectification filter, inductance coil, electrolytic capacitor C1 and magnetic sheet capacitor C2, the positive terminal of described single-phase bridge rectification filter connects LED+, the negative pole end of single-phase bridge rectification filter by be connected into LED-after resistance R 3, metal-oxide-semiconductor and inductance coil are connected; Described electrolytic capacitor C1 and magnetic sheet capacitor C2 are connected in parallel on the described filter circuit; Described current detection circuit is connected to form by resistance R 1, R2, R3 and R4, and described current detection circuit is connected with filter circuit; The Vin end of described voltage stabilization and current stabilization circuit is connected with LED+, the Mosc end of voltage stabilization and current stabilization circuit is connected LED-by R6, R3 with inductance coil, the LD of voltage stabilization and current stabilization circuit end is connected the negative pole of LED lamp through R3 after by the parallel connection of R8 and C5 with inductance coil, the vdd terminal of voltage stabilization and current stabilization circuit is in parallel with C4 again by the series connection of R7, R8, through R3 and the inductance coil LED-that is linked back, the PWM end of voltage stabilization and current stabilization circuit is connected into negative pole end VDD by resistance R 5 at last.
Need to prove; particular of the present utility model; the utility model is described in detail; concerning with those skilled in the art, under the situation that does not deviate from spirit and scope of the present utility model it is being carried out conspicuous change all within protection range of the present utility model.
Claims (1)
1. LED constant-current controller, comprise filter circuit, current detection circuit and voltage stabilization and current stabilization circuit, it is characterized in that: described filter circuit comprises a single-phase bridge rectification filter, inductance coil, electrolytic capacitor C1 and magnetic sheet capacitor C2, the positive terminal of described single-phase bridge rectification filter connects LED+, the negative pole end of single-phase bridge rectification filter by be connected into LED-after resistance R 3, metal-oxide-semiconductor and inductance coil are connected; Described electrolytic capacitor C1 and magnetic sheet capacitor C2 are connected in parallel on the described filter circuit; Described current detection circuit is connected to form by resistance R 1, R2, R3 and R4, and described current detection circuit is connected with filter circuit; The Vin end of described voltage stabilization and current stabilization circuit is connected with LED+, the Mosc end of voltage stabilization and current stabilization circuit is connected LED-by R6, R3 with inductance coil, the LD of voltage stabilization and current stabilization circuit end is connected the negative pole of LED lamp through R3 after by the parallel connection of R8 and C5 with inductance coil, the vdd terminal of voltage stabilization and current stabilization circuit is in parallel with C4 again by the series connection of R7, R8, through R3 and the inductance coil LED-that is linked back, the PWM end of voltage stabilization and current stabilization circuit is connected into negative pole end VDD by resistance R 5 at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201522732U CN201440744U (en) | 2009-04-30 | 2009-04-30 | LED constant-current controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201522732U CN201440744U (en) | 2009-04-30 | 2009-04-30 | LED constant-current controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201440744U true CN201440744U (en) | 2010-04-21 |
Family
ID=42545398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201522732U Expired - Fee Related CN201440744U (en) | 2009-04-30 | 2009-04-30 | LED constant-current controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201440744U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675419A (en) * | 2012-09-19 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Constant-current comparison circuit and LED lamp group current monitoring device |
-
2009
- 2009-04-30 CN CN2009201522732U patent/CN201440744U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675419A (en) * | 2012-09-19 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Constant-current comparison circuit and LED lamp group current monitoring device |
| CN103675419B (en) * | 2012-09-19 | 2018-02-06 | 深圳市海洋王照明工程有限公司 | Constant current comparison circuit and LED light group current monitoring device |
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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: 20100421 Termination date: 20140430 |