CN206596269U - Dimmable LED drive control circuit - Google Patents
Dimmable LED drive control circuit Download PDFInfo
- Publication number
- CN206596269U CN206596269U CN201720297010.5U CN201720297010U CN206596269U CN 206596269 U CN206596269 U CN 206596269U CN 201720297010 U CN201720297010 U CN 201720297010U CN 206596269 U CN206596269 U CN 206596269U
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- Prior art keywords
- circuit
- control circuit
- electrically connected
- led
- led drive
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- Expired - Fee Related
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- 238000013021 overheating Methods 0.000 claims abstract description 11
- 230000005619 thermoelectricity Effects 0.000 claims description 2
- 238000005286 illumination Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model belongs to technical field of LED illumination, and in particular to a kind of Dimmable LED drive control circuit.It includes filter circuit, bridge rectifier, reduction voltage circuit, overvoltage crowbar, control circuit, overheating protection circuit, PWM drive circuit and LED/light source, the input termination civil power of filter circuit, the output end of filter circuit and the input of bridge rectifier are electrically connected with, the output end of bridge rectifier and the input of reduction voltage circuit are electrically connected with, reduction voltage circuit is electrically connected with overvoltage crowbar and control circuit respectively, overvoltage crowbar is electrically connected with PWM drive circuit, circuit is controlled to be electrically connected with respectively with PWM drive circuit and overheating protection circuit, PWM drive circuit is electrically connected with LED/light source.
Description
Technical field
The utility model belongs to technical field of LED illumination, and in particular to a kind of Dimmable LED drive control circuit.
Background technology
LED (Light-Emitting-Diode Chinese meaning the be light emitting diode) is that one kind can convert electrical energy into can
See the semiconductor of light, it changes the luminous principle lighted with electricity-saving lamp tricolor powder of incandescent lamp tungsten filament, and uses electroluminescence.
According to analysis, long lifespan, light efficiency be high, radiationless and low-power consumption the characteristics of LED clearly.LED spectrum almost all is concentrated on
Visible light frequency band, its luminous efficiency is up to 80~90%.By LED and ordinary incandescent lamp, spiral energy-saving lamp and T5 three primary colours fluorescence
Lamp is contrasted, and is as a result shown：The light efficiency of ordinary incandescent lamp is 12lm/W, and the life-span is less than 2000 hours, the light of spiral energy-saving lamp
Imitate as 60lm/W, the life-span is less than 8000 hours, T5 fluorescent lamps are then 96lm/W, and the life-span is about 10000 hours, and a diameter of 5
The white light LEDs of millimeter are 20~28lm/W, and the life-span can be more than 100000 hours.
The electrology characteristic of white light LEDs has very strong discreteness, and white light LEDs are a kind of homomorphism electric light sources, is a kind of
Semiconductor lighting devices.It has that small volume, mechanical strength be big, low in energy consumption, long lifespan, is easy to adjust and controls and pollution-free
It is a kind of new type light source product for having a tremendous expansion prospect etc. feature.But because the positive C-V characteristic of white light LEDs is very steep, it is
Its power supply is relatively difficult, and the relatively minor swing of White LED operating voltage may result in the drastically change of operating current, in some instances it may even be possible to burn
Bad LED.
Referenced patent document CN201623892U discloses a kind of LED control circuit and the LED lamp using the circuit, should
Circuit includes power circuit, LED drive circuit, wireless reception circuit, control circuit and is connected on the LED drive circuit
LED output interfaces, power circuit connects wireless receiving circuit, control circuit and LED drive circuit and powered respectively, and power circuit is
The power circuit of direct current is exported, wireless receiving circuit is the control circuit of generation data signal, wireless receiving circuit, control circuit
With the connection of LED drive circuit successively signal.Although the referenced patent document discloses LED control circuit, but only has control
The bright function of LED, during LED uses, is not protected to LED, and when overvoltage, excessively stream, LED can be caused not
Recoverable infringement.
Utility model content
Part, the utility model proposes a kind of Dimmable LED drive control circuit, is somebody's turn to do in view of the shortcomings of the prior art
Drive control circuit, the direct current that civil power is converted into being available for LED/light source to use, and also powered for control circuit.In order to prevent
Voltage is caused damage to LED/light source, and LED/light source is protected using overvoltage crowbar.
The utility model is adopted the following technical scheme that：
Dimmable LED drive control circuit, it includes filter circuit, bridge rectifier, reduction voltage circuit, overvoltage protection electricity
Road, control circuit, overheating protection circuit, PWM drive circuit and LED/light source, the input termination civil power of filter circuit, filter circuit
Output end and the input of bridge rectifier be electrically connected with, the output end of bridge rectifier and the input of reduction voltage circuit
It is electrically connected with, reduction voltage circuit is electrically connected with overvoltage crowbar and control circuit respectively, and overvoltage crowbar drives electricity with PWM
Road is electrically connected with, and control circuit is electrically connected with PWM drive circuit and overheating protection circuit respectively, PWM drive circuit and LED light
Source is electrically connected with.
Further, PWM drive circuit includes first resistor R1, triode Q1, second resistance R2 and FET Q2, three
Pwm signal output end of the pole pipe Q1 base stage through first resistor R1 connection control circuits, grounded emitter, colelctor electrode connects FET
Q2 grid, concatenates second resistance R2 between FET Q2 grid and source electrode, drain electrode is grounded through LED, and
Source electrode takes over the output end of voltage protection circuit.
Further, triode Q1 is NPN type triode, and FET Q2 is P-channel power MOSFET IRF9540.
Further, filter circuit is capacitor filter.
Further, overheating protection circuit includes temperature sensor, and temperature sensor is thermoelectricity occasionally thermistor.
Further, it is single chip machine controlling circuit to control circuit.
The utility model has advantages below and beneficial effect compared with prior art：1. using overvoltage crowbar, prevent
Voltage is raised suddenly, and LED/light source is caused damage；2. using overheating protection circuit, prevent temperature too high, circuit performance degenerates,
Component premature failure；3. it is direct current by AC conversion to utilize bridge rectifier, and bridge rectifier is using simply
Bridge architecture, just can have full-wave rectifying circuit rectification feature, make Dimmable LED drive circuit of the present invention simpler.
Brief description of the drawings
Fig. 1 is the structured flowchart of Dimmable LED drive control circuit；
Fig. 2 is the schematic diagram of PWM drive circuit.
Embodiment
To further illustrate each embodiment, the utility model is provided with accompanying drawing.These accompanying drawings are in the utility model is disclosed
A part for appearance, it is mainly to illustrate embodiment, and running of the associated description of specification to explain embodiment can be coordinated former
Reason.Coordinate and refer to these contents, those of ordinary skill in the art will be understood that other possible embodiments and this practicality are new
The advantage of type.Component in figure is not necessarily to scale, and similar element numbers are conventionally used to indicate similar component.
The utility model is further illustrated in conjunction with the drawings and specific embodiments.
As shown in fig.1, the structural frames of the Dimmable LED drive control circuit 106 of the utility model preferably embodiment
Figure, it include filter circuit 101, bridge rectifier 102, reduction voltage circuit 103, overvoltage crowbar 104, control circuit 106,
Overheating protection circuit 108, PWM drive circuit 107 and LED/light source 105, the input termination civil power of filter circuit 101, filter circuit
101 output end is electrically connected with the input of bridge rectifier 102, output end and the decompression electricity of bridge rectifier 102
The input on road 103 is electrically connected with, and reduction voltage circuit 103 is electrically connected with overvoltage crowbar 104 and control circuit 106 respectively,
Overvoltage crowbar 104 is electrically connected with PWM drive circuit 107, control circuit 106 respectively with PWM drive circuit 107 and overheat
Protection circuit 108 is electrically connected with, and PWM drive circuit 107 is electrically connected with LED/light source 105.
In addition, filter circuit 101 is capacitor filter 101.And capacitor filter 101 has that circuit is simple, volume
It is small, the characteristics of cost is low.
Civil power after circuit 101, bridge rectifier 102, the processing of reduction voltage circuit 103, obtains DC voltage after filtering,
Powered for control circuit 106.Because civil power is unstable, the voltage for causing reduction voltage circuit 103 to export also can and then change, and work as voltage
Suddenly during rise, the electric current increase of LED/light source 105 is flowed through, LED/light source 105 is caused damage.The embodiment uses overvoltage protection
Circuit 104, is protected to LED/light source 105.
As shown in fig.2, being the schematic diagram of PWM drive circuit 107, PWM drive circuit 107 includes first resistor R1, three
Pole pipe Q1, second resistance R2 and FET Q2, triode Q1 PWM letter of the base stage through first resistor R1 connection control circuits 106
Number output end, grounded emitter, colelctor electrode connects FET Q2 grid, is concatenated between FET Q2 grid and source electrode
Two resistance R2, drain electrode is grounded through LED, and source electrode takes over the output end of voltage protection circuit 104.
It should be noted that the triode Q1 of the embodiment is NPN type triode, FET Q2 is P-channel power
MOSFET IRF9540.When PWM ripples export high level, triode Q1 conductings, so that FET Q2 grid voltage is low
In source voltage, FET Q2 source electrode and drain electrode are turned on, and LED is lighted；When PWM ripples export low level, triode Q1 is cut
Only, FET Q2 is also switched off, and LED extinguishes.When PWM frequency is more than 100Hz, the average LED of human viewable conducting and cut-off
Time, the sensation of LED luminance change is produced, its brightness is directly proportional to LED turn-on cycles.
LED/light source 105 can produce amount of heat due to working long hours, and the component in general circuit is all thermo-labile,
If permanent infringement at component long-time at high temperature, can be caused to component.The overheating protection circuit of the embodiment
108 include temperature sensor, and temperature sensor is thermistor.Thermistor detects the temperature at LED/light source 105, and will
Testing result feeds back to control circuit 106, and control circuit 106 is contrasted real time temperature with preset value, if it exceeds default
Value, then control the control LED/light source 105 of circuit 106 to close, to realize the purpose of protection circuit.
In order to save cost, the control circuit 106 of the embodiment uses single chip machine controlling circuit 106.
Although specifically showing and describing the utility model with reference to preferred embodiment, those skilled in the art should
This is understood, is not departing from the spirit and scope of the present utility model that appended claims are limited, in form and details
On the utility model can be made a variety of changes, be protection domain of the present utility model.
Claims (6)
1. Dimmable LED drive control circuit, it is characterised in that：It include filter circuit, bridge rectifier, reduction voltage circuit,
Overvoltage crowbar, control circuit, overheating protection circuit, PWM drive circuit and LED/light source, the input of the filter circuit
Civil power is connect, the output end of filter circuit and the input of bridge rectifier are electrically connected with, the output of the bridge rectifier
End and the input of reduction voltage circuit are electrically connected with, and reduction voltage circuit is electrically connected with overvoltage crowbar and control circuit respectively, institute
State overvoltage crowbar to be electrically connected with PWM drive circuit, control circuit is electric with PWM drive circuit and overheating protection circuit respectively
Property connection, the PWM drive circuit and LED/light source are electrically connected with.
2. Dimmable LED drive control circuit as claimed in claim 1, it is characterised in that：The PWM drive circuit includes the
One resistance R1, triode Q1, second resistance R2 and FET Q2, the base stage of the triode Q1 connect control through first resistor R1
The pwm signal output end of circuit, grounded emitter, colelctor electrode connects FET Q2 grid, FET Q2 grid and source
Second resistance R2 is concatenated between pole, drain electrode is grounded through LED, and source electrode takes over the output end of voltage protection circuit.
3. Dimmable LED drive control circuit as claimed in claim 2, it is characterised in that：The triode Q1 is NPN type three
Pole pipe, FET Q2 is P-channel power MOSFET IRF9540.
4. Dimmable LED drive control circuit as claimed in claim 1, it is characterised in that：The filter circuit is filtered for electric capacity
Wave circuit.
5. Dimmable LED drive control circuit as claimed in claim 1, it is characterised in that：The overheating protection circuit includes
Temperature sensor, the temperature sensor is thermoelectricity occasionally thermistor.
6. Dimmable LED drive control circuit as claimed in claim 1, it is characterised in that：It is described to control circuit to be single-chip microcomputer
Control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720297010.5U CN206596269U (en) | 2017-03-24 | 2017-03-24 | Dimmable LED drive control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720297010.5U CN206596269U (en) | 2017-03-24 | 2017-03-24 | Dimmable LED drive control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206596269U true CN206596269U (en) | 2017-10-27 |
Family
ID=60122070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720297010.5U Expired - Fee Related CN206596269U (en) | 2017-03-24 | 2017-03-24 | Dimmable LED drive control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206596269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024422A (en) * | 2018-01-15 | 2018-05-11 | 佛山市南海区平翊电子有限公司 | A kind of bluetooth color-temperature regulating LED drive power |
-
2017
- 2017-03-24 CN CN201720297010.5U patent/CN206596269U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024422A (en) * | 2018-01-15 | 2018-05-11 | 佛山市南海区平翊电子有限公司 | A kind of bluetooth color-temperature regulating LED drive power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20171027 |