CN206365089U - A kind of multi-stage isolation LED drive circuit dimmed for LED - Google Patents
A kind of multi-stage isolation LED drive circuit dimmed for LED Download PDFInfo
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- CN206365089U CN206365089U CN201621475540.6U CN201621475540U CN206365089U CN 206365089 U CN206365089 U CN 206365089U CN 201621475540 U CN201621475540 U CN 201621475540U CN 206365089 U CN206365089 U CN 206365089U
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model, which provides a kind of multi-stage isolation LED drive circuit for LED light modulations, to be included：Input rectifying filter circuit, dimmer input signal conversion isolation circuit, output adjusting control circuit, pwm signal correcting circuit；The dimmer input signal conversion isolation circuit is converted into pwm signal including microcontroller U6, and exports the on or off for controlling triode Q6 by pwm signal to triode Q6 base stage；The emitter stage of the triode is connected with photoelectrical coupler U7 input；The output adjusting control circuit includes operational amplifier U3, and its negative input connects a reference voltage, and electrode input end is connected to the output end of the photoelectrical coupler U7；The output end of the operational amplifier U3 is connected to the pwm signal correcting circuit by photo-coupler U2；The input of the pwm control signal input output adjusting control circuit after the correction of the pwm signal correcting circuit output, changes the brightness of LED chip.
Description
Technical field
The utility model is related to a kind of LED drive circuit, more particularly to a kind of LED dimming driving circuits.
Background technology
At present in LED light adjusting circuits, the 0-10V signals of light adjusting circuit output are used with output loop shares ground connection, directly
Connect and be compared 0-10V d. c. voltage signals with amplifier reference signal, be output to feedback circuit to adjust circuit output, such as
Fruit 0-10V input signals are non-isolated (non-security) circuit, there is potential safety hazard.
Utility model content
Technical problem underlying to be solved in the utility model is to provide a kind of multi-stage isolation LED drives dimmed for LED
Dynamic circuit, isolates to the signal that light modulator is exported, and timely light modulator is in the state of non-security isolation, can also make safely
With.
In order to solve above-mentioned technical problem, the utility model provides a kind of multi-stage isolation LED drives dimmed for LED
Dynamic circuit, including：Input rectifying filter circuit, dimmer input signal conversion isolation circuit, output adjusting control circuit, PWM
Peaking circuit；
The dimmer input signal conversion isolation circuit is converted into pwm signal including microcontroller U6, and exports to three
Pole pipe Q6 base stage, triode Q6 on or off is controlled by pwm signal；The emitter stage and photoelectric coupling of the triode
Device U7 input connection；
The output adjusting control circuit includes operational amplifier U3, and its negative input connects reference electricity
Pressure, electrode input end is connected to the output end of the photoelectrical coupler U7；The output end of the operational amplifier U3 passes through optocoupler
Clutch U2 is connected to the pwm signal correcting circuit；
Pwm control signal after the correction of the pwm signal correcting circuit output inputs the output adjusting control circuit
Input, change LED chip brightness.
In a preferred embodiment：Another electrode input end of the operational amplifier U3 sets 2.5V reference electricity
Pressure, another negative input is connected to the output end of output adjusting control circuit by decompression network, and another output end passes through
Photo-coupler U2 is connected to the pwm signal correcting circuit.
In a preferred embodiment：The pwm signal correcting circuit is exported according to two output ends of operational amplifier U3
Signal, changes the dutycycle of output pwm signal, adjusts power output.
In a preferred embodiment：The light modulator is the light modulator that output signal is 0-10V.
In a preferred embodiment：The light modulator is resistance light modulator or PWM count word signal light modulator.
Compared to prior art, the technical solution of the utility model possesses following beneficial effect：
A kind of multi-stage isolation LED drive circuit dimmed for LED that the utility model is provided, using first that 0-10V is straight
Voltage signal sampling is flowed, pwm signal is converted into by microcontroller, then pwm signal is transmitted by the optocoupler being electrically isolated
To the output current controller of power supply.Carry out completion brightness adjustment control.After so setting, even if light modulator is the type of non-security isolation
Number, safe handling can also be accomplished.
A kind of multi-stage isolation LED drive circuit dimmed for LED that the utility model is provided, can using microprocessor interface
, such as can directly connecting resistance light modulator or PWM count word light modulator with other compatible various types of dim signals.
Brief description of the drawings
Fig. 1 is the circuit diagram of the preferred embodiment of the present invention.
Embodiment
With reference to Fig. 1, a kind of multi-stage isolation LED drive circuit dimmed for LED, the light modulator is that output signal is 0-
10V light modulator.The drive circuit includes：Input rectifying filter circuit, dimmer input signal conversion isolation circuit, output
Adjusting control circuit, pwm signal correcting circuit；
The dimmer input signal conversion isolation circuit is converted into pwm signal including microcontroller U6, and exports to three
Pole pipe Q6 base stage, triode Q6 on or off is controlled by pwm signal；The emitter stage and photoelectric coupling of the triode
Device U7 input connection；
The output adjusting control circuit includes operational amplifier U3, and its negative input connects reference electricity
Pressure, electrode input end is connected to the output end of the photoelectrical coupler U7；The output end of the operational amplifier U3 passes through optocoupler
Clutch U2 is connected to the pwm signal correcting circuit；
Pwm control signal after the correction of the pwm signal correcting circuit output inputs the output adjusting control circuit
Input, change LED chip brightness.Therefore, dimmer input signal and output adjusting control circuit output are achieved that
The isolation of signal, even if dimmer input signal is non-isolated, it is also ensured that safe handling.
Another electrode input end of the operational amplifier U3 sets 2.5V reference voltage, and another negative input leads to
The output end that decompression network is connected to output adjusting control circuit is crossed, another output end is connected to described by photo-coupler U2
Pwm signal correcting circuit.
The signal that the pwm signal correcting circuit is exported according to two output ends of operational amplifier U3, changes output PWM letters
Number dutycycle, adjust power output.
Due to using microprocessor interface, therefore circuit of the present utility model can other compatible various types of light modulation letters
Number, such as can directly connecting resistance light modulator or PWM count word light modulator.
It is described above, only the utility model preferably embodiment, but design concept of the present utility model is not
This is confined to, any one skilled in the art utilizes this design in the technical scope that the utility model is disclosed
The change of unsubstantiality is carried out to the utility model, belongs to invade the behavior of the utility model protection domain.
Claims (5)
1. a kind of multi-stage isolation LED drive circuit dimmed for LED, it is characterised in that including：Input rectifying filter circuit, tune
Light device input signal conversion isolation circuit, output adjusting control circuit, pwm signal correcting circuit；
The dimmer input signal conversion isolation circuit is converted into pwm signal including microcontroller U6, and exports to triode
Q6 base stage, triode Q6 on or off is controlled by pwm signal；The emitter stage of the triode and photoelectrical coupler U7
Input connection；
The output adjusting control circuit includes operational amplifier U3, and its negative input connects a reference voltage, just
Pole input is connected to the output end of the photoelectrical coupler U7；The output end of the operational amplifier U3 passes through photo-coupler U2
It is connected to the pwm signal correcting circuit；
Pwm control signal after the correction of the pwm signal correcting circuit output inputs the defeated of the output adjusting control circuit
Enter end, change the brightness of LED chip.
2. a kind of multi-stage isolation LED drive circuit dimmed for LED according to claim 1, it is characterised in that：It is described
Operational amplifier U3 another electrode input end sets 2.5V reference voltage, and another negative input is connected by decompression network
The output end of output adjusting control circuit is connected to, another output end is connected to the pwm signal by photo-coupler U2 and corrected
Circuit.
3. a kind of multi-stage isolation LED drive circuit dimmed for LED according to claim 2, it is characterised in that：It is described
The signal that pwm signal correcting circuit is exported according to two output ends of operational amplifier U3, changes the dutycycle of output pwm signal,
Adjust power output.
4. a kind of multi-stage isolation LED drive circuit dimmed for LED according to claim 1, it is characterised in that：It is described
Light modulator is the light modulator that output signal is 0-10V.
5. a kind of multi-stage isolation LED drive circuit dimmed for LED according to claim 4, it is characterised in that：It is described
Light modulator is resistance light modulator or PWM count word signal light modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621475540.6U CN206365089U (en) | 2016-12-30 | 2016-12-30 | A kind of multi-stage isolation LED drive circuit dimmed for LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621475540.6U CN206365089U (en) | 2016-12-30 | 2016-12-30 | A kind of multi-stage isolation LED drive circuit dimmed for LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206365089U true CN206365089U (en) | 2017-07-28 |
Family
ID=59378354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621475540.6U Active CN206365089U (en) | 2016-12-30 | 2016-12-30 | A kind of multi-stage isolation LED drive circuit dimmed for LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206365089U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107787085A (en) * | 2017-10-18 | 2018-03-09 | 浙江凯耀照明股份有限公司 | 0 10V of one kind light modulation isolation LED power circuits |
-
2016
- 2016-12-30 CN CN201621475540.6U patent/CN206365089U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107787085A (en) * | 2017-10-18 | 2018-03-09 | 浙江凯耀照明股份有限公司 | 0 10V of one kind light modulation isolation LED power circuits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190422 Address after: 7th Floor, 88 Houxiang Road, Haicang District, Xiamen City, Fujian Province, 361000 Patentee after: Xiamen Sunshine Commercial Lighting Co., Ltd. Address before: No. 88 Houxiang Road, Xinyang Industrial Park, Haicang District, Xiamen City, Fujian Province, 361000 Patentee before: Xiamen Yankon Energetic Lighting Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190828 Address after: Xinyang Industrial Park Haicang District of Xiamen City, Fujian province 361000 after Cheung Road No. 88 Patentee after: Xiamen Yankon Energetic Lighting Co., Ltd. Address before: 7th Floor, 88 Houxiang Road, Haicang District, Xiamen City, Fujian Province, 361000 Patentee before: Xiamen Sunshine Commercial Lighting Co., Ltd. |
|
| TR01 | Transfer of patent right |