CN203872417U - Light-emitting diode drive circuit - Google Patents
Light-emitting diode drive circuit Download PDFInfo
- Publication number
- CN203872417U CN203872417U CN201420308059.2U CN201420308059U CN203872417U CN 203872417 U CN203872417 U CN 203872417U CN 201420308059 U CN201420308059 U CN 201420308059U CN 203872417 U CN203872417 U CN 203872417U
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- CN
- China
- Prior art keywords
- circuit
- thermistor
- voltage
- electronic switch
- electrically connected
- 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.)
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Classifications
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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
Abstract
The utility model relates to a light-emitting diode drive circuit which is used for driving light-emitting diode illumination lamps and lanterns. The light-emitting diode drive circuit comprises an electromagnetic interference filter circuit, a high-voltage protection circuit, a rectifying circuit, a voltage conversion circuit, a drive circuit, a surge protection circuit and a control circuit. The surge protection circuit comprises a thermistor and an electronic switch, and is used for suppressing surge current generated during start-up of the light-emitting diode drive circuit through the thermistor. The control circuit outputs a control signal to control on and off of the electronic switch so as to bypass the thermistor. By the above light-emitting diode drive circuit, surge current generated during start-up can be inhibited, and bypass of the surge protection circuit can be carried out when surge suppression is completed. Unnecessary power consumption generated by the surge protection circuit is avoided, and power usage effectiveness is raised.
Description
Technical field
The utility model relates to power-supplying circuit, relates in particular to a kind of large-power light-emitting diodes drive circuit.
Background technology
Light-emitting diode (LED) lighting is a kind of novel green illumination product, and with respect to traditional illuminating product (as: incandescent lamp, fluorescent lamp), that LED lighting has is efficient, energy-conservation, the life-span is long and the advantage such as environmental protection.Identical illuminating effect, LED lighting is more energy-conservation more than 60% than traditional illuminating product.
In LED lighting, need design driven circuit to come driving LED light source to realize illumination functions, drive circuit needs to design anti-surge circuit simultaneously to be realized and when drive circuit starts, suppresses surge circuit, yet after drive circuit is stable, anti-surge circuit still can electric consumption power, thereby cause the waste of the energy.
Utility model content
The purpose of this utility model is, a kind of LED drive circuit is provided, to solve traditional LED light source drive circuit under stable state, and the technical problem that its anti-surge circuit still can electric consumption power.
To achieve these goals, the utility model provides a kind of LED drive circuit, for driving LED lighting.Described LED drive circuit comprises electromagnetic interference filter circuit, high voltage protection circuit, rectification circuit, voltage conversion circuit, drive circuit, surging protection circuit and control circuit.Described surging protection circuit is electrically connected on described rectification circuit and described voltage conversion circuit, described surging protection circuit comprises thermistor and electronic switch, and described surging protection circuit suppresses the surge current producing when described LED drive circuit starts by described thermistor.Described control circuit is electrically connected on described electronic switch, controls conducting and the disconnection of described electronic switch, with thermistor described in bypass for exporting control signal.
Preferably, described control circuit is for receiving the voltage of described voltage conversion circuit output and carrying out voltage transformation to export described control signal.
Preferably, described control circuit is also for carrying out the driving voltage after described conversion rectification, filtering and voltage stabilizing to export described control signal.
Preferably, described electronic switch comprises control end, first end and the second end, and described control end is electrically connected on described control circuit, and described first end is electrically connected on one end of described thermistor, and described the second end is electrically connected on the other end of described thermistor.
Preferably, described electronic switch is N-type metal oxide semiconductor field effect tube.
The beneficial effects of the utility model: the utility model provides a kind of LED drive circuit, the surge current that it can suppress to produce in start-up course by surging protection circuit, avoid surge current to cause damage to late-class circuit/LED lighting, after completing Inrush current restraining, can carry out bypass processing to surging protection circuit simultaneously, avoid surging protection circuit to produce unnecessary power consumption, improved power supply service efficiency.
In order further to understand feature of the present utility model and technology contents, refer to following about detailed description of the present utility model and accompanying drawing, yet accompanying drawing only provide with reference to and explanation use, be not used for the utility model to be limited.
Accompanying drawing explanation
Fig. 1 is the module map of LED drive circuit in the utility model one execution mode.
Fig. 2 is the circuit diagram of control circuit in the utility model one execution mode.
Main element symbol description
LED drive circuit 100
External ac power source 10
Electromagnetic interference filter circuit 20
High voltage protection circuit 30
Rectification circuit 40
Voltage conversion circuit 50
Drive circuit 60
Surging protection circuit 70
Control circuit 80
LED lighting 90
Electronic switch Q1
The first to the 5th resistance R 1, R2, R3, R4, R5
Thermistor RT
Transformer T1
Diode D1
Capacitor C 1 C1
Voltage-stabiliser tube Z1
Triode Q2
Embodiment
Technological means and the effect thereof for further setting forth the utility model, taked, be described in detail below in conjunction with preferred embodiment of the present utility model and accompanying drawing thereof.
Fig. 1 is the module map of LED drive circuit 100 in the utility model one execution mode.In the present embodiment, LED drive circuit 100 receives the voltage of external ac power source 10 outputs and carries out voltage transformation with outputting drive voltage driving LED lighting 90.LED drive circuit 100 comprises electromagnetic interference filter circuit 20, high voltage protection circuit 30, rectification circuit 40, voltage conversion circuit 50, drive circuit 60, surging protection circuit 70 and control circuit 80.Electromagnetic interference filter circuit 20, high voltage protection circuit 30, rectification circuit 40, voltage conversion circuit 50, drive circuit 60 are connected in series successively.In the present embodiment, LED lighting 90 carries out luminous lighting by receiving the driving voltage of drive circuit 60 outputs.Electromagnetic interference filter circuit 20, high voltage protection circuit 30, voltage conversion circuit 50 and drive circuit 60 can utilize prior art circuits, module to realize, and rectification circuit 40 is preferably full bridge rectifier.
Surging protection circuit 70 is electrically connected on rectification circuit 40, for realizing, suppress when LED drive circuit 100 starts to say the surge current producing, thereby avoid the surge current that 100 startup moments of LED drive circuit produce to cause damage to late-class circuit or LED illuminating lamp 90.
In the present embodiment, surging protection circuit 70 comprises electronic switch Q1, thermistor RT, the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3.Electronic switch Q1 comprises control end, first end and the second end.The first end of electronic switch Q1 is electrically connected on rectification circuit 40, and the control end of electronic switch Q1 is electrically connected on one end of the first resistance R 1, and the other end of the first resistance R 1 is electrically connected on control circuit 80.The second resistance R 2 is electrically connected between the first end and control end of electronic switch Q1.One end of thermistor RT is electrically connected on the first end of electronic switch Q1 and the common port of rectification circuit 40, and the other end of thermistor RT is electrically connected on the second end of electronic switch Q1.One end of the 3rd resistance R 3 is electrically connected on the second end of electronic switch Q1 and the common port of thermistor RT, the other end ground connection of the 3rd resistance R 3.Surging protection circuit 70 is realized the surge current that suppresses to say when LED drive circuit 100 starts generation by thermistor RT.In the present embodiment, the resistance of the 3rd resistance R 3 is much smaller than the resistance of thermistor RT under normal temperature.
Control circuit 80 output control signals are controlled conducting and the disconnection of electronic switch Q1, thereby complete after Inrush current restraining at surging protection circuit 70, and thermistor RT is carried out to bypass.In the present embodiment, control circuit 80 can select to export control signal by receiving control command, thereby controls conducting and the disconnection of electronic switch Q1.When surging protection circuit 70 completes Inrush current restraining, control circuit outputs control signals to the control end of electronic switch Q1, make electronic switch Q1 in conducting state, thermistor RT is by short circuit, and then make surging protection circuit 70 after completing Inrush current restraining, thermistor RT does not produce power consumption, has improved capacity usage ratio, reaches the object of energy saving.
In the present embodiment, electronic switch Q1 is preferably N-type metal oxide semiconductor field effect tube, and the first resistance R 1 and the second resistance R 2 are for providing suitable bias voltage to electronic switch Q1.In other execution modes of the present utility model, electronic switch Q1 can be also the lower switch element of internal resistance after the conducting of other types.
The circuit diagram of control circuit 80 in Fig. 2 the utility model one execution mode.In the present embodiment, control circuit 80 comprises transformer T1, the 4th resistance R 4, diode D1, capacitor C 1, the 5th resistance R 5, voltage-stabiliser tube Z1 and triode Q2.One end that the primary coil of transformer T1 is electrically connected on voltage conversion circuit 50, the four resistance R 4 is electrically connected on one end of transformer T1 secondary coil, the other end ground connection of transformer T1 secondary coil.The positive pole of diode D1 is electrically connected on the other end of the 4th resistance R 4, and the negative electricity of diode D1 is connected in one end of capacitor C 1, the other end ground connection of capacitor C 1.The collector electrode of triode Q2 is electrically connected on the common port of diode D1 and capacitor C 1, and the emitter of triode Q2 is electrically connected on surging protection circuit 70, and the base stage of triode Q2 is electrically connected on the negative pole of voltage-stabiliser tube Z1, the plus earth of voltage-stabiliser tube Z1.The 5th resistance R 5 is electrically connected between the collector electrode and base stage of triode Q2.Control circuit 80 obtains voltage signal and carries out voltage transformation from voltage conversion circuit 50 by transformer T1, after through diode D1 carry out rectification, capacitor C 1 carries out filtering and voltage-stabiliser tube Z1 carries out voltage stabilizing, and then output control signals to surging protection circuit 70 by the emitter of triode Q2, thereby control conducting and the disconnection of electronic switch Q1, realization completes after Inrush current restraining at surging protection circuit 70, thermistor RT is carried out to bypass processing, avoid thermistor RT to produce unnecessary power consumption.
In sum, the utility model provides a kind of LED drive circuit, the surge current that it can suppress to produce in start-up course by surging protection circuit, avoid surge current to cause damage to late-class circuit/LED lighting, after completing Inrush current restraining, can carry out bypass processing to surging protection circuit simultaneously, avoid surging protection circuit to produce unnecessary power consumption, improved power supply service efficiency.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to the technical solution of the utility model and technical conceive, and all these changes and distortion all should belong to the protection range of the utility model claim.
Claims (5)
1. a LED driving circuit, for external ac power source being carried out to voltage transformation to drive light-emitting diode (LED) illuminating lamp, described LED driving circuit comprises electromagnetic interference filter circuit, high voltage protection circuit, rectification circuit, voltage conversion circuit and drive circuit, it is characterized in that, described LED driving circuit also comprises:
Surging protection circuit, is electrically connected on described rectification circuit, and described surging protection circuit comprises thermistor and electronic switch, and described surging protection circuit suppresses the surge current producing when described LED driving circuit starts by described thermistor; And
Control circuit, is electrically connected on described electronic switch, controls conducting and the disconnection of described electronic switch, with thermistor described in bypass for exporting control signal.
2. LED driving circuit as claimed in claim 1, is characterized in that, described control circuit is for receiving the voltage of described voltage conversion circuit output and carrying out voltage transformation to export described control signal.
3. LED driving circuit as claimed in claim 2, is characterized in that, described control circuit is also for carrying out the driving voltage after described conversion rectification, filtering and voltage stabilizing to export described control signal.
4. LED driving circuit as claimed in claim 1, it is characterized in that, described electronic switch comprises control end, first end and the second end, described control end is electrically connected on described control circuit, described first end is electrically connected on one end of described thermistor, and described the second end is electrically connected on the other end of described thermistor.
5. LED driving circuit as claimed in claim 1, is characterized in that, described electronic switch is N-type metal oxide semiconductor field effect tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420308059.2U CN203872417U (en) | 2014-06-11 | 2014-06-11 | Light-emitting diode drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420308059.2U CN203872417U (en) | 2014-06-11 | 2014-06-11 | Light-emitting diode drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203872417U true CN203872417U (en) | 2014-10-08 |
Family
ID=51653334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420308059.2U Expired - Fee Related CN203872417U (en) | 2014-06-11 | 2014-06-11 | Light-emitting diode drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203872417U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429449A (en) * | 2015-12-09 | 2016-03-23 | 深圳欧陆通电子有限公司 | Anti-surge switching power supply and anti-surge circuit |
-
2014
- 2014-06-11 CN CN201420308059.2U patent/CN203872417U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429449A (en) * | 2015-12-09 | 2016-03-23 | 深圳欧陆通电子有限公司 | Anti-surge switching power supply and anti-surge circuit |
| WO2017097002A1 (en) * | 2015-12-09 | 2017-06-15 | 深圳欧陆通电子有限公司 | Anti-surge switching power supply and anti-surge circuit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20160611 |