CN202634853U - Power-saving light emitting diode driver - Google Patents
Power-saving light emitting diode driver Download PDFInfo
- Publication number
- CN202634853U CN202634853U CN 201220316410 CN201220316410U CN202634853U CN 202634853 U CN202634853 U CN 202634853U CN 201220316410 CN201220316410 CN 201220316410 CN 201220316410 U CN201220316410 U CN 201220316410U CN 202634853 U CN202634853 U CN 202634853U
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- China
- Prior art keywords
- triode
- voltage
- emitting diode
- stabiliser tube
- resistance
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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 a power-saving light emitting diode driver. The power-saving light emitting diode driver comprises a rectifier, a light emitting diode set and a constant current controller, wherein the light emitting diode set includes a plurality of light emitting diodes arranged in parallel; the constant current controller comprises a second resistor, a third resistor, a first triode, a second triode, a first voltage regulator tube and a second voltage regulator tube; the output terminal of the light emitting diode set is connected to a circuit between the first voltage regulator tube and the second resistor; the positive electrode of the first voltage regulator tube is connected to the base electrode of the first diode; the collector electrode of the second triode is connected to a circuit between the first voltage regulator tube and base electrode of the first triode; the negative electrode of the second voltage regulator tube is connected to a line between the base electrode of the second triode and the collector electrode of the first triode; and the two ends of the third resistor are respectively connected to a circuit between the positive electrode of the second voltage regulator tube and the emitting electrode of the second diode. With the above structure, the power-saving light emitting diode driver has a simple integral structure and a small size, and can save voltage and avoid damage to light emitting diodes due to the change of the voltage.
Description
Technical field
The utility model relates to lighting apparatus, specifically is the power conservation type LED drive.
Background technology
Along with the development of society, requiring of people's illumination equipment is increasingly high, and operating voltage is low, light efficiency is high because of LED has, so the research of LED and using more and more widely.Electrology characteristic by LED can be known; The mean forward current of LED is along with the increase of forward voltage presents significantly linear growth; The change of LED its forward voltage behind forward conduction will cause the LED very big variation of stream that powers on; And electric current is very big to the influence of LED junction temperature, and excessive electric current is easy to cause LED to damage because of junction temperature raises.LED can damage because of the change of voltage, and this has just had influence on applying of LED lighting.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, provide a kind of can avoid the supply power voltage change time LED damage because of the change of voltage, and can save the power conservation type LED drive of voltage.
The purpose of the utility model mainly realizes through following technical scheme: the power conservation type LED drive; Comprise the rectifier, light-emitting diode group and the constant-current controller that connect successively; Said rectifier is provided with two inputs and two outputs; An output of rectifier is connected with light-emitting diode group, its another output head grounding; Said light-emitting diode group comprises the light-emitting diode of a plurality of parallel connections; Said constant-current controller comprises second resistance, the 3rd resistance, first triode, second triode, first voltage-stabiliser tube and second voltage-stabiliser tube; The two ends of said second resistance are connected with the emitter of the first voltage-stabiliser tube negative pole and first triode respectively; The output of said light-emitting diode group is connected on the circuit between first voltage-stabiliser tube and second resistance; The positive pole of first voltage-stabiliser tube is connected with the base stage of first triode; The collector electrode of second triode is connected with circuit between first voltage-stabiliser tube and first transistor base, and second transistor base is connected with first transistor collector, and the negative pole of second voltage-stabiliser tube is connected with circuit between second transistor base and first transistor collector; Circuit between anodal with second voltage-stabiliser tube respectively and second transistor emitter in said the 3rd resistance two ends is connected, and is connected with earth connection on the line between the 3rd resistance and second voltage-stabiliser tube.
Said rectifier comprises the rectification unit and first electric capacity; Said rectification unit is provided with two inputs and two outputs; Be connected with first resistance on the input of rectification unit; An output of rectification unit is connected with light-emitting diode group, is connected with earth connection on another output of rectification unit, and the two ends of said first electric capacity are connected on two outputs of rectification unit.Two of rectification unit inputs in the utility model, output constitute the input and output side of rectifier, and two inputs of rectification unit receive the input of supply power voltages.
Said rectification unit is a bridge rectifier.
Because of thermistor its resistance when voltage increases increases, thereby can produce overcurrent protection, as preferably, said first resistance is thermistor.
Said first triode is the PNP triode, and second triode is the NPN triode.
Compared with prior art, the utlity model has following beneficial effect: the utility model comprises rectifier, light-emitting diode group and constant-current controller, wherein; Constant-current controller comprises second resistance, the 3rd resistance, first triode, second triode, first voltage-stabiliser tube and second voltage-stabiliser tube, and the utility model overall structure is simple, and volume is little; Be convenient to realize that cost is low, the utility model is when using; Second resistance, first triode and first voltage-stabiliser tube constitute a constant-current source in the constant-current controller; This constant-current source provides stable operating current for second voltage-stabiliser tube, and it is the constant-current source that first voltage-stabiliser tube provides the steady operation electric current that second triode, the 3rd resistance and second voltage-stabiliser tube constitute one, stablizes the other side's voltage-stabiliser tube working point mutually owing to two constant-current sources; Thereby the total current that flows through on the constant-current controller is no longer changed; Operating current is constant in the light-emitting diode group, and so the electric current of every light-emitting diode is identical in the light-emitting diode group, obtains uniform brightness; Light-emitting diode can not damage because of change in voltage, is convenient to applying of LED lighting apparatus; Light-emitting diode in the utility model in the light-emitting diode group adopts the mode of parallel connection to connect, and saves voltage.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
The pairing name of Reference numeral is called in the accompanying drawing: 1-rectification unit, R1-first resistance, R2-second resistance; R3-the 3rd resistance, C1-first electric capacity, Q1-first triode; Q2-second triode, LED1-first light-emitting diode, LED2-second light-emitting diode; LED3-the 3rd light-emitting diode, DW1-first voltage-stabiliser tube, DW2-second voltage-stabiliser tube.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is done further to specify, but the execution mode of the utility model is not limited thereto.
Embodiment:
As shown in Figure 1, the power conservation type LED drive comprises the rectifier, light-emitting diode group and the constant-current controller that connect successively; Wherein, rectifier comprises the rectification unit 1 and first capacitor C 1, and rectification unit 1 is a bridge rectifier; Rectification unit 1 is provided with two inputs and two outputs; Two inputs of rectification unit 1 receive the input of supply power voltage, are connected with first resistance R, 1, the first resistance R, the 1 preferred thermistor that adopts on the input of rectification unit 1.An output of rectification unit 1 is connected with light-emitting diode group, is connected with earth connection on another output of rectification unit 1, and the two ends of first capacitor C 1 are connected on two outputs of rectification unit 1.Light-emitting diode group comprises the light-emitting diode of a plurality of parallel connections, preferably is provided with three light-emitting diodes in the present embodiment, and three light-emitting diodes are respectively first LED 1, second LED 2 and the 3rd LED 3.
Constant-current controller comprises second resistance R 2, the 3rd resistance R 3, the first triode Q1, the second triode Q2, the first voltage-stabiliser tube DW1 and the second voltage-stabiliser tube DW2, and wherein, the first triode Q1 is the PNP triode, and the second triode Q2 is the NPN triode.The two ends of second resistance R 2 are connected with the emitter of the first voltage-stabiliser tube DW1 negative pole and the first triode Q1 respectively, and the output of light-emitting diode group is connected on the circuit between the first voltage-stabiliser tube DW1 and second resistance R 2.The positive pole of the first voltage-stabiliser tube DW1 is connected with the base stage of the first triode Q1, and the collector electrode of the second triode Q2 is connected with circuit between the first voltage-stabiliser tube DW1 and the first triode Q1 base stage.The second triode Q2 base stage is connected with the first triode Q1 collector electrode, and the negative pole of the second voltage-stabiliser tube DW2 is connected with circuit between the second triode Q2 base stage and the first triode Q1 collector electrode.Circuit between anodal with the second voltage-stabiliser tube the DW2 respectively and second triode Q2 emitter in the 3rd resistance R 3 two ends is connected, and is connected with earth connection on the line between the 3rd resistance R 3 and the second voltage-stabiliser tube DW2.
As stated, then can well realize the utility model.
Claims (5)
1. power conservation type LED drive; It is characterized in that: comprise the rectifier, light-emitting diode group and the constant-current controller that connect successively; Said rectifier is provided with two inputs and two outputs, and an output of rectifier is connected with light-emitting diode group, its another output head grounding; Said light-emitting diode group comprises the light-emitting diode of a plurality of parallel connections; Said constant-current controller comprises second resistance (R2), the 3rd resistance (R3), first triode (Q1), second triode (Q2), first voltage-stabiliser tube (DW1) and second voltage-stabiliser tube (DW2); The two ends of said second resistance (R2) are connected with the emitter of first voltage-stabiliser tube (DW1) negative pole and first triode (Q1) respectively; The output of said light-emitting diode group is connected on the circuit between first voltage-stabiliser tube (DW1) and second resistance (R2); The positive pole of first voltage-stabiliser tube (DW1) is connected with the base stage of first triode (Q1); The collector electrode of second triode (Q2) is connected with circuit between first voltage-stabiliser tube (DW1) and first triode (Q1) base stage; Second triode (Q2) base stage is connected with first triode (Q1) collector electrode; The negative pole of second voltage-stabiliser tube (DW2) is connected with circuit between second triode (Q2) base stage and first triode (Q1) collector electrode; Circuit between anodal with second voltage-stabiliser tube (DW2) respectively and second triode (Q2) emitter in said the 3rd resistance (R3) two ends is connected, and is connected with earth connection on the line between the 3rd resistance (R3) and second voltage-stabiliser tube (DW2).
2. power conservation type LED drive according to claim 1; It is characterized in that: said rectifier comprises rectification unit (1) and first electric capacity (C1); Said rectification unit (1) is provided with two inputs and two outputs; Be connected with first resistance (R1) on the input of rectification unit (1); An output of rectification unit (1) is connected with light-emitting diode group, is connected with earth connection on another output of rectification unit (1), and the two ends of said first electric capacity (C1) are connected on two outputs of rectification unit (1).
3. power conservation type LED drive according to claim 2 is characterized in that: said rectification unit (1) is a bridge rectifier.
4. power conservation type LED drive according to claim 2 is characterized in that: said first resistance (R1) is thermistor.
5. according to described any power conservation type LED drive of claim 1～4, it is characterized in that: said first triode (Q1) is the PNP triode, and second triode (Q2) is the NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220316410 CN202634853U (en) | 2012-07-03 | 2012-07-03 | Power-saving light emitting diode driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220316410 CN202634853U (en) | 2012-07-03 | 2012-07-03 | Power-saving light emitting diode driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202634853U true CN202634853U (en) | 2012-12-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220316410 Expired - Fee Related CN202634853U (en) | 2012-07-03 | 2012-07-03 | Power-saving light emitting diode driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202634853U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103533700A (en) * | 2012-07-03 | 2014-01-22 | 成都市宏山科技有限公司 | Power-saving light-emitting diode driver |
-
2012
- 2012-07-03 CN CN 201220316410 patent/CN202634853U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103533700A (en) * | 2012-07-03 | 2014-01-22 | 成都市宏山科技有限公司 | Power-saving light-emitting diode driver |
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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: 20121226 Termination date: 20130703 |