CN102685966A - Constant current circuit and lamp - Google Patents
Constant current circuit and lamp Download PDFInfo
- Publication number
- CN102685966A CN102685966A CN2011100573029A CN201110057302A CN102685966A CN 102685966 A CN102685966 A CN 102685966A CN 2011100573029 A CN2011100573029 A CN 2011100573029A CN 201110057302 A CN201110057302 A CN 201110057302A CN 102685966 A CN102685966 A CN 102685966A
- Authority
- CN
- China
- Prior art keywords
- current
- chip
- load
- termination
- power supply
- 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.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a constant current circuit and a lamp, which are applicable to the field of illumination devices. The constant current circuit comprises a direct current/direct current conversion module, a current adjuster and a sampling resistor, wherein the current adjuster is connected with an anode of a load, and the sampling resistor is connected with a cathode of the load. In the embodiment of the invention, through changing the resistance of the sampling resistor, the current of the load can be randomly set according to needs.
Description
Technical field
The invention belongs to the lighting apparatus field, relate in particular to a kind of constant-current circuit and light fixture.
Background technology
Fig. 1 is the structure of existing constant-current circuit, and constant-current circuit comprises DC module and constant flow module, and the DC module a value, makes the current constant that flows through load through constant flow module with stabilized input voltage again.
But the shortcoming that this constant-current circuit exists is the specification that its reference constant current is limited by constant flow module, and size of current can not arbitrarily be provided with as required.
Summary of the invention
The object of the present invention is to provide a kind of constant-current circuit, be intended to solve the problem that present constant-current circuit exists size of current arbitrarily not to be provided with as required.
The present invention is achieved in that a kind of constant-current circuit, and said constant-current circuit comprises:
DC module, the current regulator that is connected with the positive pole of load and the sampling resistor that is connected with the negative pole of load;
The input termination DC power supply of said DC module, output termination current regulator, the said sampling resistor of feedback termination is used for the load current according to said sampling resistor sampling, controls said current regulator regulating load electric current.
Another purpose of the present invention is to provide a kind of light fixture, and said light fixture comprises constant-current circuit, and said constant-current circuit comprises:
DC module, the current regulator that is connected with the positive pole of load and the sampling resistor that is connected with the negative pole of load;
The input termination DC power supply of said DC module, output termination current regulator, the said sampling resistor of feedback termination is used for the load current according to said sampling resistor sampling, controls said current regulator regulating load electric current.
In the present invention, constant-current circuit comprises DC module, the current regulator that is connected with the positive pole of load and the sampling resistor that is connected with the negative pole of load, through changing the resistance of sampling resistor, the load current size can be set arbitrarily as required.
Description of drawings
Fig. 1 is the module map of the constant-current circuit that provides of the embodiment of the invention;
Fig. 2 is the exemplary circuit figure of the constant-current circuit that provides of the embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 shows the modular structure of the constant-current circuit that the embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
Constant-current circuit comprises DC module 100, the current regulator 200 that is connected with the positive pole of load and the sampling resistor R2 that is connected with the negative pole of load;
The input termination DC power supply of DC module 100, output termination current regulator 200, feedback termination sampling resistor R2 is used for the load current according to sampling resistor R2 sampling, Control current adjuster 200 regulating load electric currents.
Fig. 2 shows the exemplary circuit structure of the constant-current circuit that the embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
As one embodiment of the present invention, DC module 100 comprises:
DC chip U1, current-limiting resistance R1 and sequential capacitor C 1;
The driving tube collector terminal DRV COLL of DC chip U1 connects DC power supply through current-limiting resistance R1; The load peak current detecting end IPK of DC chip U1 connects DC power supply through current-limiting resistance R1; The power end VCC of DC chip U1 connects DC power supply; The switching tube collector terminal SW COLL of DC chip U1 connects DC power supply through current-limiting resistance R1; The timing capacitor end TIM CAP of DC chip U1 is through sequential capacitor C 1 ground connection; The ground end GND ground connection of DC chip U1, the switching tube emitter terminal SW EM of DC chip U1 connects current regulator 200, and the comparator inverting input IN of DC chip U1 connects the negative pole of load and the link of sampling resistor R2.As one embodiment of the present invention, DC chip U1 can adopt 34063 model chips.
As one embodiment of the present invention, current regulator 200 comprises:
Inductance L 1, sustained diode 1 and electrochemical capacitor C2;
The switching tube emitter terminal SW EM of one termination DC chip U1 of inductance L 1; The positive pole of another termination load of inductance L 1; The negative electrode of sustained diode 1 meets the switching tube emitter terminal SW EM of DC chip U1; The plus earth of sustained diode 1, electrochemical capacitor C2 is connected between load positive pole and the ground.
As one embodiment of the present invention; DC power supply is rectifier U2; The ac input end AC of rectifier U2 connects AC power; The positive output end V+ of rectifier U2 meets DC chip U1, and the positive output end V+ of rectifier U2 passes through capacitor C 3 ground connection, the negative output terminal V-ground connection of rectifier U2 simultaneously.
The sampling resistor R2 load current of sampling; Convert load current to comparator inverting input IN that voltage signal is input to DC chip U1; Compare with the benchmark of inside, recently regulate the energy storage of inductance L 1 according to result relatively through the duty that changes switching tube emitter terminal SW EM output signal, indirect regulation flows through the electric current of load; Through changing the resistance of sampling resistor R2, the load current size can be set arbitrarily as required.
Another embodiment of the present invention also provide one comprise above-mentioned constant-current circuit light fixture.
In embodiments of the present invention; Constant-current circuit comprises DC module, the current regulator that is connected with the positive pole of load and the sampling resistor that is connected with the negative pole of load; Through changing the resistance of sampling resistor, the load current size can be set arbitrarily as required.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a constant-current circuit is characterized in that, said constant-current circuit comprises:
DC module, the current regulator that is connected with the positive pole of load and the sampling resistor that is connected with the negative pole of load;
The input termination DC power supply of said DC module, output termination current regulator, the said sampling resistor of feedback termination is used for the load current according to said sampling resistor sampling, controls said current regulator regulating load electric current.
2. constant-current circuit as claimed in claim 1 is characterized in that, said DC module comprises:
DC chip U1, current-limiting resistance R1 and sequential capacitor C 1;
The driving tube collector terminal of said DC chip U1 connects DC power supply through current-limiting resistance R1; The load peak current detecting end of said DC chip U1 connects DC power supply through current-limiting resistance R1; The power supply termination DC power supply of said DC chip U1; The switching tube collector terminal of said DC chip U1 connects DC power supply through current-limiting resistance R1; The timing capacitor end of said DC chip U1 is through sequential capacitor C 1 ground connection; The ground end ground connection of said DC chip U1, the switching tube emitter termination current regulator of said DC chip U1, the comparator inverting input of said DC chip U1 connects the negative pole of load and the link of sampling resistor.
3. constant-current circuit as claimed in claim 2 is characterized in that, said current regulator comprises:
Inductance L 1, sustained diode 1 and electrochemical capacitor C2;
The switching tube emitter terminal of one termination DC chip U1 of said inductance L 1; The positive pole of another termination load of said inductance L 1; The negative electrode of said sustained diode 1 connects the switching tube emitter terminal of DC chip U1; The plus earth of said sustained diode 1, said electrochemical capacitor C2 is connected between load positive pole and the ground.
4. a light fixture is characterized in that, said light fixture comprises constant-current circuit, and said constant-current circuit comprises:
DC module, the current regulator that is connected with the positive pole of load and the sampling resistor that is connected with the negative pole of load;
The input termination DC power supply of said DC module, output termination current regulator, the said sampling resistor of feedback termination is used for the load current according to said sampling resistor sampling, controls said current regulator regulating load electric current.
5. light fixture as claimed in claim 4 is characterized in that, said DC module comprises:
DC chip U1, current-limiting resistance R1 and sequential capacitor C 1;
The driving tube collector terminal of said DC chip U1 connects DC power supply through current-limiting resistance R1; The load peak current detecting end of said DC chip U1 connects DC power supply through current-limiting resistance R1; The power supply termination DC power supply of said DC chip U1; The switching tube collector terminal of said DC chip U1 connects DC power supply through current-limiting resistance R1; The timing capacitor end of said DC chip U1 is through sequential capacitor C 1 ground connection; The ground end ground connection of said DC chip U1, the switching tube emitter termination current regulator of said DC chip U1, the comparator inverting input of said DC chip U1 connects the negative pole of load and the link of sampling resistor.
6. light fixture as claimed in claim 5 is characterized in that, said current regulator comprises:
Inductance L 1, sustained diode 1 and electrochemical capacitor C2;
The switching tube emitter terminal of one termination DC chip U1 of said inductance L 1; The positive pole of another termination load of said inductance L 1; The negative electrode of said sustained diode 1 connects the switching tube emitter terminal of DC chip U1; The plus earth of said sustained diode 1, said electrochemical capacitor C2 is connected between load positive pole and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110057302.9A CN102685966B (en) | 2011-03-10 | 2011-03-10 | A kind of constant-current circuit and light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110057302.9A CN102685966B (en) | 2011-03-10 | 2011-03-10 | A kind of constant-current circuit and light fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102685966A true CN102685966A (en) | 2012-09-19 |
| CN102685966B CN102685966B (en) | 2015-10-28 |
Family
ID=46817147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110057302.9A Expired - Fee Related CN102685966B (en) | 2011-03-10 | 2011-03-10 | A kind of constant-current circuit and light fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102685966B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887867A (en) * | 2014-03-28 | 2014-06-25 | 国网节能服务有限公司 | Method for providing electric power for electricity consumption facilities through expressway wind energy |
| CN111491421A (en) * | 2020-04-21 | 2020-08-04 | 深圳海令科技有限公司 | Festive lantern actuating system based on P L C-BUS technique |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200997705Y (en) * | 2007-01-09 | 2007-12-26 | 张建平 | High-brightness LED illuminating system |
| CN201114894Y (en) * | 2007-06-13 | 2008-09-10 | 王元成 | A LED driving circuit |
| CN201528453U (en) * | 2009-11-20 | 2010-07-14 | 鞠娣 | LED constant current source capable of half-power controlling |
| CN101827480A (en) * | 2010-04-30 | 2010-09-08 | 海洋王照明科技股份有限公司 | LED drive control circuit |
| CN101861005A (en) * | 2010-04-01 | 2010-10-13 | 海洋王照明科技股份有限公司 | LED drive circuit and portable lamp |
-
2011
- 2011-03-10 CN CN201110057302.9A patent/CN102685966B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200997705Y (en) * | 2007-01-09 | 2007-12-26 | 张建平 | High-brightness LED illuminating system |
| CN201114894Y (en) * | 2007-06-13 | 2008-09-10 | 王元成 | A LED driving circuit |
| CN201528453U (en) * | 2009-11-20 | 2010-07-14 | 鞠娣 | LED constant current source capable of half-power controlling |
| CN101861005A (en) * | 2010-04-01 | 2010-10-13 | 海洋王照明科技股份有限公司 | LED drive circuit and portable lamp |
| CN101827480A (en) * | 2010-04-30 | 2010-09-08 | 海洋王照明科技股份有限公司 | LED drive control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887867A (en) * | 2014-03-28 | 2014-06-25 | 国网节能服务有限公司 | Method for providing electric power for electricity consumption facilities through expressway wind energy |
| CN111491421A (en) * | 2020-04-21 | 2020-08-04 | 深圳海令科技有限公司 | Festive lantern actuating system based on P L C-BUS technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102685966B (en) | 2015-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101389168B (en) | High-voltage large power LCD constant current driving device | |
| CN108966430B (en) | Linear driving circuit of LED lighting lamp | |
| CN102105007A (en) | LED constant-current driver with boosting function | |
| CN103152895B (en) | The circuit of the direct driving LED of a kind of alternating current | |
| CN101581443A (en) | Flameproof intrinsically safe LED illuminating lamp with unlimited output power | |
| CN102630114A (en) | Closed-loop control LED (Light Emitting Diode) constant-current driving circuit | |
| EP2953430A1 (en) | Alternating current rectifying circuit and alternating current rectifying method for driving led module | |
| CN104010405A (en) | LED light modulation circuit | |
| CN203136261U (en) | LED light modulation circuit | |
| CN102685966A (en) | Constant current circuit and lamp | |
| CN104242812A (en) | Single-chip microcomputer based solar power controller | |
| CN204377199U (en) | Adopt constant current driver circuit for LED and the device of step-down constant current driving unit | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN104080231A (en) | LED drive system | |
| CN103068096A (en) | Light-emitting diode (LED) lamp, current sampling circuit and drive circuit of LED lamp | |
| CN102821520A (en) | LED (light-emitting diode) driving circuit and control method thereof | |
| CN202663614U (en) | Low-power light emitting diode (LED) constant-current power supply | |
| CN201429013Y (en) | LED emergency lighting lamp | |
| CN202503717U (en) | Solar energy light-operated light emitting diode array lamp capable of automatic turning on and off | |
| CN211019358U (en) | Voltage reduction driving circuit | |
| CN203151827U (en) | Ultra-long-life large-current light emitting diode (LED) drive power circuit | |
| CN103052237A (en) | PWM (Pulse Width Modulation) dimming LED (Light-Emitting Diode) system | |
| CN203167377U (en) | A non-isolated driving power supply used for a LED fluorescent lamp | |
| CN207505178U (en) | A kind of LED constant current source system | |
| CN102695318A (en) | A driving circuit of lamp and a ballast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20151028 Termination date: 20190310 |