CN207266350U - LED dimming driving circuits and LED drive device - Google Patents
LED dimming driving circuits and LED drive device Download PDFInfo
- Publication number
- CN207266350U CN207266350U CN201721355208.0U CN201721355208U CN207266350U CN 207266350 U CN207266350 U CN 207266350U CN 201721355208 U CN201721355208 U CN 201721355208U CN 207266350 U CN207266350 U CN 207266350U
- Authority
- CN
- China
- Prior art keywords
- resistor
- electronic switch
- circuit
- driving circuit
- switch
- 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.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 4
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid 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]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a kind of LED dimming driving circuits and LED drive device, the drive circuit includes dim signal detection circuit, master controller and switch driving circuit and pwm signal output circuit, the dim signal detection circuit is used to access dim signal, and the output terminal of dim signal detection circuit is connected with master controller；The control terminal of master controller and the input terminal of switch driving circuit connect, and the output terminal of switch driving circuit is connected with the controlled end of pwm signal output circuit, and the output terminal of pwm signal output circuit is connected with LED light；Wherein, the pulse signal exported with controlling switch drive circuit according to the master controller turns on/off, so as to drive the switch driving circuit to turn on/off, and exports corresponding high/low level pulse drive signal, realizes driving LED light work.The utility model realizes the dimming function to LED light, reduces output power, energy conservation and environmental protection.
Description
Technical Field
The utility model relates to a LED lamp drive technical field, in particular to LED drive circuit and LED drive arrangement that adjusts luminance.
Background
At present, the LED lamp has many advantages such as energy saving, environmental protection, long service life, small volume, etc., and is gradually applied to replace the traditional light source in the aspect of lighting, etc., becoming a new generation of solid lighting source. However, the existing various LED lamp driving circuits are complex, high in cost and low in cost performance, and with the improvement of the lighting quality requirements of people, the LED lamp with fixed brightness cannot meet the requirements of people, and is not beneficial to saving energy.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a LED drive circuit and LED drive arrangement that adjusts luminance aims at realizing the dimming function to the LED lamp, reduces output, and is energy-concerving and environment-protective to improve LED lamp vision transform effect.
In order to achieve the above object, the present invention provides an LED dimming driving circuit, which includes a dimming signal detection circuit, a main controller, a switch driving circuit and a PWM signal output circuit, wherein the dimming signal detection circuit is used for accessing a dimming signal, and an output end of the dimming signal detection circuit is connected to the main controller; the control end of the main controller is connected with the input end of the switch driving circuit, the output end of the switch driving circuit is connected with the controlled end of the PWM signal output circuit, and the output end of the PWM signal output circuit is connected with the LED lamp; wherein,
the dimming signal detection circuit is used for detecting and outputting a dimming signal input from the outside;
the main controller is used for generating a corresponding pulse signal according to the dimming signal and outputting the pulse signal;
the switch driving circuit is used for switching on/off according to the pulse signal output by the main controller;
and the PWM signal output circuit is used for outputting corresponding high/low level pulse driving signals according to the on/off of the switch driving circuit so as to drive the LED lamp to work.
Preferably, the dimming signal detection circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, and a first capacitor, a first end of the first resistor is an input end of the dimming signal detection circuit, and a second end of the first resistor is interconnected with a first end of the third resistor and a first end of the fourth resistor through the second resistor; the second end of the third resistor is the output end of the dimming signal detection circuit and is connected with the first end of the first capacitor; the first end of the fourth resistor and the second end of the first capacitor are both grounded.
Preferably, the dimming signal detection circuit further comprises a fifth resistor and a first diode, a first end of the fifth resistor is connected with the first direct current power supply, and a second end of the fifth resistor is connected with an anode of the first diode; a cathode of the first diode is interconnected with the first and second resistors.
Preferably, the switch driving circuit includes a sixth resistor, a seventh resistor, an eighth resistor, and a first electronic switch, a first end of the sixth resistor is an input end of the switch driving circuit and is connected to a first end of the seventh resistor, and a second end of the sixth resistor is connected to a controlled end of the first electronic switch; the first conductive end of the first electronic switch is the output end of the switch driving circuit and is connected with the first end of the eighth resistor, and the output end of the first electronic switch is grounded; and the second end of the seventh resistor and the second end of the eighth resistor are both connected with a first direct current power supply.
Preferably, the first electronic switch is an NPN type triode, a base of the NPN type triode is a controlled terminal of the first electronic switch, a collector of the NPN type triode is a first conductive terminal of the first electronic switch, and an emitter of the NPN type triode is a second conductive terminal of the first electronic switch.
Preferably, the PWM signal output circuit includes a second electronic switch and a third electronic switch, the controlled terminals of the second electronic switch and the third electronic switch are both connected to the output terminal of the switch driving circuit, and the first conductive terminal of the second electronic switch is connected to the first dc power supply; the second conductive end of the second electronic switch is connected with the first conductive end of the third electronic switch, and the second conductive end of the third electronic switch is grounded; and the common end of the second electronic switch and the second electronic switch is the output end of the PWM signal output circuit.
Preferably, the second electronic switch is an NPN type triode, the third electronic switch is a PNP type triode, a base of the NPN type triode is a controlled terminal of the second electronic switch, a collector of the NPN type triode is a first conductive terminal of the second electronic switch, and an emitter of the NPN type triode is a second conductive terminal of the second electronic switch; the base of the PNP type triode is the controlled end of the third electronic switch, the collector of the PNP type triode is the first conducting end of the second electronic switch, and the emitter of the PNP type triode is the second conducting end of the second electronic switch.
Preferably, the main controller is an STM8S003F3P3 type singlechip.
The utility model also provides a LED driving device, which comprises an LED lamp and the LED dimming driving circuit; the LED dimming driving circuit comprises a dimming signal detection circuit, a main controller, a switch driving circuit and a PWM signal output circuit, wherein the dimming signal detection circuit is used for accessing a dimming signal, and the output end of the dimming signal detection circuit is connected with the main controller; the control end of the main controller is connected with the input end of the switch driving circuit, the output end of the switch driving circuit is connected with the controlled end of the PWM signal output circuit, and the output end of the PWM signal output circuit is connected with the LED lamp; the dimming signal detection circuit is used for detecting and outputting a dimming signal input from the outside; the main controller is used for generating a corresponding pulse signal according to the dimming signal and outputting the pulse signal; the switch driving circuit is used for switching on/off according to the pulse signal output by the main controller; and the PWM signal output circuit is used for outputting corresponding high/low level pulse driving signals according to the on/off of the switch driving circuit so as to drive the LED lamp to work.
The utility model discloses a set up main control unit to the pulse signal that corresponds is produced according to the dimming signal of the signal detection circuit output that adjusts luminance that links to each other with it, with control switch drive circuit basis the pulse signal of main control unit output is opened/is turn-offed, thereby the drive switch drive circuit is opened/is turn-offed, and the high/low level pulse drive signal that the output corresponds realizes the work of drive LED lamp. The utility model discloses a controller is according to received signal of adjusting luminance, adjusts pulse signal's duty cycle, adjusts PWM signal output circuit's duty cycle, realizes the adjustment and exports the voltage size to the LED lamp to control the luminance of LED lamp. The utility model discloses a to the dimming function of LED lamp, reduce output, it is energy-concerving and environment-protective to improve LED lamp vision transform effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of a functional module of an embodiment of the LED dimming driving circuit of the present invention applied to an LED driving device;
fig. 2 is a schematic circuit diagram of an embodiment of the LED dimming driving circuit in fig. 1.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a LED drive circuit that adjusts luminance.
Referring to fig. 1 and 2, in an embodiment of the present invention, the LED dimming driving circuit includes a dimming signal detection circuit 10, a main controller 20, a switch driving circuit 30, and a PWM signal output circuit 40.
The dimming signal detection circuit 10 is used for accessing a dimming signal, and an output end of the dimming signal detection circuit 10 is connected with the main controller 20; the control end of the main controller 20 is connected with the input end of the switch driving circuit 30, the output end of the switch driving circuit 30 is connected with the controlled end of the PWM signal output circuit 40, and the output end of the PWM signal output circuit 40 is connected with the LED lamp; wherein,
the dimming signal detection circuit 10 is configured to detect and output a dimming signal input from the outside;
the main controller 20 is configured to generate and output a corresponding pulse signal according to the dimming signal;
the switch driving circuit 30 is configured to turn on/off according to a pulse signal output by the main controller 20;
the PWM signal output circuit 40 is configured to output a corresponding high/low level pulse driving signal according to the on/off of the switch driving circuit 30, so as to drive the LED lamp to operate.
In this embodiment, the main controller 20 may be implemented by using a DSP control system, a single chip microcomputer, and the like, and in this embodiment, an STM8S003F3P3 type single chip microcomputer is preferably used for implementation.
It should be noted that the input end of the dimming signal detection circuit 10 can generally receive an externally input dimming signal through the communication interface J1, and one end of the communication interface J1 can be connected to a wireless communication circuit or a key circuit, and generates a corresponding dimming signal according to a brightness adjustment signal input by a user, such as a remote controller or a key. In this embodiment, the dimming signal detection circuit 10 may receive an externally input voltage signal of 0 to 10V or an externally input PWM signal, and output the corresponding voltage signal or PWM signal to the main controller 20 after performing voltage division processing, so that the main controller 20 outputs a corresponding pulse signal according to the corresponding voltage signal or PWM signal.
The switch driving circuit 30 drives the electronic switch 30 to be turned on or off based on the control of the main controller 20. The operating voltage of the main controller 20 is generally 5V, and the driving voltage of the LED lamp is 10-35V, in order to improve the driving capability of the LED lamp, the switch driving circuit 30 amplifies the pulse signal output by the main controller 20 and outputs the amplified pulse signal to the PWM signal output circuit 40, so that the PWM signal output circuit 40 outputs a high/low level PWM signal to the LED lamp according to the pulse driving signal output by the switch driving circuit 30, thereby driving the LED lamp to operate.
The LED lamp has an anode connected to a driving power source and a cathode connected to an output terminal of the PWM signal output circuit 40, and is turned on when the PWM signal output circuit 40 outputs a low-level pulse driving signal, and is turned off and not turned on when the low-level pulse driving signal is output. Specifically, when the switch driving circuit 30 receives the high level pulse signal outputted from the main controller 20, the switch driving circuit 30 is turned on, and controls the PWM signal output circuit 40 to output the low level pulse signal to the LED lamp, where the cathode of the LED lamp is at a low level and the anode of the LED lamp is at a high level, and the LED lamp is turned on. When the switch driving circuit 30 receives the low level pulse signal outputted from the main controller 20, the switch driving circuit 30 is turned off, and controls the PWM signal output circuit 40 to output a high level pulse signal to the LED lamp, where the cathode and the anode of the LED lamp are both at a high level and are not turned on.
It can be understood that the main controller 20 adjusts the duty ratio of the pulse signal according to the received dimming signal, that is, adjusts the duty ratio of the PWM signal output circuit 40, thereby adjusting the brightness of the LED lamp.
The utility model discloses a set up main control unit 20 to the pulse signal that corresponds is produced according to the dimming signal of the signal detection circuit of adjusting luminance 10 output that links to each other with it, with control switch drive circuit 30 basis the pulse signal of main control unit 20 output is opened/is shut off, thereby the drive switch drive circuit 30 is opened/is shut off to the high/low level pulse drive signal that the output corresponds realizes driving the LED lamp work. The utility model discloses a controller is according to received signal of adjusting luminance, adjusts pulse signal's duty cycle, adjusts PWM signal's of PWM signal output circuit 40 duty cycle, realizes the adjustment and exports the voltage size to the LED lamp to control the luminance of LED lamp. The utility model discloses a to the dimming function of LED lamp, reduce output, it is energy-concerving and environment-protective to improve LED lamp vision transform effect.
Referring to fig. 1 and 2, in a preferred embodiment, the dimming signal detection circuit 10 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first capacitor C1, a first end of the first resistor R1 is an input end of the dimming signal detection circuit 10, and a second end of the first resistor R1 is interconnected with a first end of the third resistor R3 and a first end of the fourth resistor R4 through the second resistor R2; the second end of the third resistor R3 is the output end of the dimming signal detection circuit 10, and is connected to the first end of the first capacitor C1; the first end of the fourth resistor R4 and the second end of the first capacitor C1 are both grounded.
The dimming signal detection circuit 10 can receive an externally input voltage signal of 0-10V, and input the voltage signal through the first resistor R1, the voltage signal is divided by serially connecting the second resistor R2 and the fourth resistor R4, and output to the main controller 20 after being limited by the third resistor R3, so that the main controller 20 generates and outputs a corresponding pulse signal according to the voltage value corresponding to the voltage signal.
In this embodiment, the dimming signal detecting circuit 10 further includes a fifth resistor R5 and a first diode D1, a first end of the fifth resistor R5 is connected to the first dc power source VCC1, and a second end of the fifth resistor R5 is connected to an anode of the first diode D1; the cathode of the first diode D1 is interconnected with the first resistor R1 and the second resistor R2.
In this embodiment, the voltage value of the first dc power VCC1 is 12V, the fifth resistor R5 is a pull-up resistor, and when the voltage value of the external input voltage signal is 0V, the voltage signal output by the first dc power VCC1 is divided by the series connection of the second resistor R2 and the fourth resistor R4, and is output to the main controller 20 after being limited by the current of the third resistor R3, so that the main controller 20 can determine the magnitude of the voltage signal output by the outside according to the reference voltage output by the first dc power VCC1 output by the fifth resistor R5, thereby improving the detection sensitivity of the main controller 20. The diode D1 is a rectifying diode D1, and is used for rectifying and outputting the voltage of the second dc power supply.
Referring to fig. 1 and 2, in a preferred embodiment, the switch driving circuit 30 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a first electronic switch Q1, a first end of the sixth resistor R6 is an input end of the switch driving circuit 30 and is connected to a first end of the seventh resistor R7, and a second end of the sixth resistor R6 is connected to a controlled end of the first electronic switch Q1; a first conductive terminal of the first electronic switch Q1 is an output terminal of the switch driving circuit 30, and is connected to a first terminal of the eighth resistor R8, and an output terminal of the first electronic switch Q1 is grounded; a second end of the seventh resistor R7 and a second end of the eighth resistor R8 are both connected to a first dc power source VCC 1.
The first electronic switch Q1 is an NPN transistor, a base of the NPN transistor is a controlled terminal of the first electronic switch Q1, a collector of the NPN transistor is a first conductive terminal of the first electronic switch Q1, and an emitter of the NPN transistor is a second conductive terminal of the first electronic switch Q1.
In this embodiment, the seventh resistor R7 provides a bias voltage for the first electronic switch Q1, when the pulse signal output by the main controller 20 is at a high level, the first electronic switch Q1 is turned on, so as to amplify and output the high-level pulse signal output by the main controller 20, and when the pulse signal output by the main controller 20 is at a low level, the first electronic switch Q1 is turned off, and outputs a low-level pulse driving signal. It can be understood that, by adjusting the voltage value corresponding to the pulse signal of the main controller 20, the conduction degree of the first electronic switch Q1 can be adjusted, that is, the duty ratio of the PWM signal output circuit 40 can be adjusted, so as to implement dimming of the LED lamp.
Referring to fig. 1 and 2, in a preferred embodiment, the PWM signal output circuit 40 includes a second electronic switch Q2 and a third electronic switch Q3, the controlled terminals of the second electronic switch Q2 and the third electronic switch Q3 are both connected to the output terminal of the switch driving circuit 30, and the first conductive terminal of the second electronic switch Q2 is connected to a first dc power VCC 1; a second conductive terminal of the second electronic switch Q2 is connected to the first conductive terminal of the third electronic switch Q3, and a second conductive terminal of the third electronic switch Q3 is grounded; the common terminal of the second electronic switch Q2 and the second electronic switch Q2 is the output terminal of the PWM signal output circuit 40.
The second electronic switch Q2 is an NPN type transistor, the third electronic switch Q3 is a PNP type transistor, a base of the NPN type transistor is a controlled terminal of the second electronic switch Q2, a collector of the NPN type transistor is a first conductive terminal of the second electronic switch Q2, and an emitter of the NPN type transistor is a second conductive terminal of the second electronic switch Q2; the base of the PNP triode is the controlled terminal of the third electronic switch Q3, the collector of the PNP triode is the first conductive terminal of the second electronic switch Q2, and the emitter of the PNP triode is the second conductive terminal of the second electronic switch Q2.
When the main controller 20 outputs the control signal of the square wave pulse to the bases of the second electronic switch Q2 and the third electronic switch Q3, the second electronic switch Q2 and the third electronic switch Q3 are driven to be turned on in turn, and when the square wave pulse is at a high level, the second electronic switch Q2 is turned on, and the third electronic switch Q3 is at an off state, so that the pulse signal of a low level is output to the LED lamp, and the LED lamp is turned on. When the square wave pulse is at a low level, the third electronic switch Q3 is turned on, and the second electronic switch Q2 is in an off state, so that a pulse signal at a high level is output to the LED lamp, and the LED lamp is in the off state and is not lighted.
The utility model discloses still provide a LED drive arrangement, LED drive arrangement includes B and as above LED drive circuit that adjusts luminance. The detailed structure of the LED dimming driving circuit can refer to the above embodiments, and is not described herein; it can be understood that, because the utility model discloses used above-mentioned LED among the LED drive arrangement to adjust luminance drive circuit, consequently, the utility model discloses LED drive arrangement's embodiment includes the whole technical scheme of the whole embodiments of above-mentioned LED drive circuit that adjusts luminance, and the technical effect who reaches is also identical, no longer gives unnecessary details here.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (9)
1. An LED dimming drive circuit is characterized by comprising a dimming signal detection circuit, a main controller, a switch drive circuit and a PWM signal output circuit, wherein the dimming signal detection circuit is used for accessing a dimming signal, and the output end of the dimming signal detection circuit is connected with the main controller; the control end of the main controller is connected with the input end of the switch driving circuit, the output end of the switch driving circuit is connected with the controlled end of the PWM signal output circuit, and the output end of the PWM signal output circuit is connected with the LED lamp; wherein,
the dimming signal detection circuit is used for detecting and outputting a dimming signal input from the outside;
the main controller is used for generating a corresponding pulse signal according to the dimming signal and outputting the pulse signal;
the switch driving circuit is used for switching on/off according to the pulse signal output by the main controller;
and the PWM signal output circuit is used for outputting corresponding high/low level pulse driving signals according to the on/off of the switch driving circuit so as to drive the LED lamp to work.
2. The LED dimming driving circuit according to claim 1, wherein the dimming signal detection circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a first capacitor, a first end of the first resistor is an input end of the dimming signal detection circuit, and a second end of the first resistor is interconnected with a first end of the third resistor and a first end of the fourth resistor via the second resistor; the second end of the third resistor is the output end of the dimming signal detection circuit and is connected with the first end of the first capacitor; the first end of the fourth resistor and the second end of the first capacitor are both grounded.
3. The LED dimming driving circuit of claim 2, wherein the dimming signal detection circuit further comprises a fifth resistor and a first diode, a first end of the fifth resistor is connected to the first dc power supply, and a second end of the fifth resistor is connected to an anode of the first diode; a cathode of the first diode is interconnected with the first and second resistors.
4. The LED dimming driving circuit according to claim 1, wherein the switch driving circuit comprises a sixth resistor, a seventh resistor, an eighth resistor and a first electronic switch, a first end of the sixth resistor is an input end of the switch driving circuit and is connected to a first end of the seventh resistor, and a second end of the sixth resistor is connected to a controlled end of the first electronic switch; the first conductive end of the first electronic switch is the output end of the switch driving circuit and is connected with the first end of the eighth resistor, and the output end of the first electronic switch is grounded; and the second end of the seventh resistor and the second end of the eighth resistor are both connected with a first direct current power supply.
5. The LED dimming driving circuit according to claim 4, wherein the first electronic switch is an NPN transistor, a base of the NPN transistor is a controlled terminal of the first electronic switch, a collector of the NPN transistor is a first conductive terminal of the first electronic switch, and an emitter of the NPN transistor is a second conductive terminal of the first electronic switch.
6. The LED dimming driving circuit according to claim 1, wherein the PWM signal output circuit comprises a second electronic switch and a third electronic switch, the controlled terminals of the second electronic switch and the third electronic switch are connected to the output terminal of the switch driving circuit, and the first conducting terminal of the second electronic switch is connected to the first dc power supply; the second conductive end of the second electronic switch is connected with the first conductive end of the third electronic switch, and the second conductive end of the third electronic switch is grounded; and the common end of the second electronic switch and the second electronic switch is the output end of the PWM signal output circuit.
7. The LED dimming driving circuit of claim 6, wherein the second electronic switch is an NPN transistor, the third electronic switch is a PNP transistor, a base of the NPN transistor is a controlled terminal of the second electronic switch, a collector of the NPN transistor is a first conductive terminal of the second electronic switch, and an emitter of the NPN transistor is a second conductive terminal of the second electronic switch; the base of the PNP type triode is the controlled end of the third electronic switch, the collector of the PNP type triode is the first conducting end of the second electronic switch, and the emitter of the PNP type triode is the second conducting end of the second electronic switch.
8. The LED dimming driving circuit according to any one of claims 1-7, wherein the main controller is an STM8S003F3P3 type single chip microcomputer.
9. An LED driving apparatus, comprising an LED lamp and the LED dimming driving circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721355208.0U CN207266350U (en) | 2017-10-19 | 2017-10-19 | LED dimming driving circuits and LED drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721355208.0U CN207266350U (en) | 2017-10-19 | 2017-10-19 | LED dimming driving circuits and LED drive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207266350U true CN207266350U (en) | 2018-04-20 |
Family
ID=61916537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721355208.0U Active CN207266350U (en) | 2017-10-19 | 2017-10-19 | LED dimming driving circuits and LED drive device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207266350U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474458A (en) * | 2020-04-17 | 2020-07-31 | 歌尔微电子有限公司 | L ED light source test tool and L ED light source test system |
-
2017
- 2017-10-19 CN CN201721355208.0U patent/CN207266350U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474458A (en) * | 2020-04-17 | 2020-07-31 | 歌尔微电子有限公司 | L ED light source test tool and L ED light source test system |
| CN111474458B (en) * | 2020-04-17 | 2022-08-19 | 歌尔微电子有限公司 | LED light source test fixture and LED light source test system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9161412B2 (en) | LED driving and dimming circuit and configuration method | |
| EP3481154B1 (en) | Led lamp control system | |
| CN212278507U (en) | Deep dimming circuit | |
| KR20100094421A (en) | Circuit for controlling an operating device for a light application, operating device and method for operation of the circuit | |
| US10362647B2 (en) | Amplitude dimming power supply for constant-voltage LED lamp group | |
| US8624526B2 (en) | Sensing device for LED lighting equipment | |
| CN108601149B (en) | LED driver supporting DMX512, IP67 and NFC wireless mode setting parameters | |
| CN207266350U (en) | LED dimming driving circuits and LED drive device | |
| CN102843804A (en) | Touch control circuit and electric torch | |
| AU2010262280A1 (en) | Dimmer luminaire | |
| CN109302777B (en) | LED dimming device and dimming system | |
| CN204559954U (en) | Automobile room lamp | |
| CN108738191B (en) | Multifunctional LED dimming interface circuit | |
| US6329766B1 (en) | Digital illumination adjusting circuit | |
| CN113411931B (en) | LED silicon controlled rectifier dimming quick response circuit and LED lighting device | |
| CN110323941A (en) | Low-power consumption standby circuit | |
| CN211184327U (en) | Load driving circuit with power switch adjusting function and lighting driving system thereof | |
| CN108924997B (en) | Two-stage light adjusting circuit | |
| CN210124031U (en) | LED lighting system capable of adaptively adjusting light according to ambient illumination | |
| CN210899726U (en) | Trinity control interface circuit of lamps and lanterns | |
| CN110267409B (en) | Dimming circuit | |
| US9198265B2 (en) | Illumination apparatus automatically adjusted with time | |
| CN203206567U (en) | LED lamp adjustment and control system | |
| CN217985484U (en) | Automatic brightness-adjusting lighting device | |
| CN110996452A (en) | Gesture induction lamp and control circuit thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |