CN203466999U - Resistance, voltage and PWM three-in-one LED intelligent dimming circuit - Google Patents
Resistance, voltage and PWM three-in-one LED intelligent dimming circuit Download PDFInfo
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- CN203466999U CN203466999U CN201320201230.5U CN201320201230U CN203466999U CN 203466999 U CN203466999 U CN 203466999U CN 201320201230 U CN201320201230 U CN 201320201230U CN 203466999 U CN203466999 U CN 203466999U
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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 resistance, voltage and PWM three-in-one LED intelligent dimming circuit. The LED intelligent dimming circuit comprises a single chip microcomputer microprocessor unit power supply circuit, a microampere-level constant current circuit used for converting external dimming resistance signals into voltage signals, a D/A digital analog conversion circuit composed of a three-order low-pass filter, and a single chip microcomputer (MCU) interface circuit. The resistance, voltage and PWM three-in-one LED intelligent dimming circuit of the utility model is compatible with three dimming modes mainly adopted in the prior art, and finally, resistance, voltage and PWM signals are inputted to two signal input lines in an unified manner, and therefore, different dimming requirements can be satisfied; current that a user needs to control and output is guided according to a relation diagram between dimming signals and output current. The resistance, voltage and PWM three-in-one LED intelligent dimming circuit has greater flexibility. Since the single chip microcomputer (MCU) is adopted, a relation between dimming signals and current outputted by a driver can be conveniently modified.
Description
Technical field
The utility model belongs to LED illumination path regulating circuit field, especially relates to the three-in-one LED Intelligent dimming circuit of a kind of resistance, voltage and PWM.
Background technology
LED illumination has a little incomparable with respect to traditional lighting, more and more receive consumer's favor, is mainly reflected in: owing to there is no ultraviolet ray and infrared ray in spectrum, both there is no heat, also there is no radiation, belong to typical green illumination light source, environmental benefit is very good.LED illumination is controlled easily, as long as adjust electric current, and just arbitrarily light modulation, different photochromic combinations are changeful, utilize sequential control circuit, more can reach colourful dynamic change effect.But existing LED light-modulating mode is all often the resistance adopting, or voltage or the single mode of PWM carry out light modulation, and it is not very good controlling effect.
Utility model content
The purpose of this utility model is to provide a kind of resistance, voltage and PWM three-in-one LED Intelligent dimming circuit; By the microampere order constant-current source of resistance light modulation, the D/A D/A conversion circuit that third-order low-pass filter forms, the voltage signal that outside resistance, voltage and tri-kinds of dim signal unifications of PWM are processed into simulation is to single-chip microcomputer (MCU), after data processing, by MCU(single-chip microcomputer) size of built-in PWM module controls LED driver output current.
For achieving the above object, the technical solution adopted in the utility model is:
The three-in-one LED Intelligent dimming circuit of resistance, voltage and PWM, described LED Intelligent dimming circuit comprises singlechip microprocessor unit power supply circuits, external dimmer resistance dim signal is converted to the microampere order constant-current circuit of voltage signal, the D/A D/A conversion circuit that three rank low-pass filtering form, and single-chip microcomputer (MCU) interface circuit; Described singlechip microprocessor unit is built-in with PWM module, non-essential resistance makes resistance dim signal convert the voltage signal of simulation to through microampere order constant-current source, the D/A D/A conversion circuit forming through third-order low-pass filter again, after A/D analog-digital converter is processed, according to dim signal and driver output current relation, the built-in PWM module of single-chip microcomputer is output pwm signal on request, controls output current size.
Described MCU interface circuit figure is the single-chip microcomputer oscillating circuit that crystal oscillator Y1 and capacitor C 20, C21 form.
The D/A D/A conversion circuit that three described rank low-pass filtering form comprises resistance R 26, capacitor C 9, resistance R 27, capacitor C 11 operational amplifiers, resistance R 28, resistance R 18 dividing potential drops and capacitor C 10; The voltage signal that the signal that the voltage signal of external dimmer or the resistance of external dimmer are processed through microampere order constant-current source or the square wave pwm signal unification of external dimmer are simulated through 7 pin outputs of resistance R 26, capacitor C 9, resistance R 27, capacitor C 11 operational amplifier IC2B portions, then send single-chip simulation digital translation mouth to process after resistance R 28, resistance R 18 dividing potential drops and capacitor C 10 filtering.
The utility model is with respect to prior art, main three kinds of light-modulating modes that adopt in the compatible prior art of the utility model, finally unified to two signal input lines, can meet different requirement of light regulation like this, can instruct user need to control the electric current of output by dim signal and output current graph of a relation.Make the flexibility of product higher, owing to having adopted single-chip microcomputer (MCU), can revise easily dim signal and driver output current relation.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is the utility model single-chip microcomputer (MCU) power supply generation+5V power supply diagram.
Fig. 3 is the utility model single-chip microcomputer (MCU) online programming terminal circuit diagram.
Fig. 4 is microampere order constant-current circuit figure of the present utility model.
Fig. 5 is the D/A D/A conversion circuit figure that three rank low-pass filtering of the present utility model form.
Fig. 6 is MCU interface circuit figure of the present utility model.
Fig. 7 is non-essential resistance light modulation of the present utility model and driver output current graph of a relation.
Fig. 8 is external voltage light modulation of the present utility model and driver output current graph of a relation.
Fig. 9 is outside PWM light modulation of the present utility model and driver output current graph of a relation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Figure 1 shows that schematic diagram of the present utility model, the utility model has built the three-in-one light adjusting circuit being comprised of non-essential resistance, voltage and PWM
,comprise: the D/A digital analog converter that the third-order low-pass filter that single-chip microcomputer (MCU) microprocessor unit, the microampere order constant-current source for non-essential resistance light modulation, external voltage and PWM light modulation are used forms.No matter use resistance light modulation or voltage or PWM dim signal, after finally becoming unified analog voltage signal, send MCU(single-chip microcomputer), through MCU(single-chip microcomputer) built-in A/D analog-digital converter, follow procedure carries out digital processing, and by MCU(single-chip microcomputer) electric current of built-in PWM module controls LED driver output.
The utility model combines the various dim signals of LED, the resistance or voltage or the pwm signal that comprise external dimmer, if outside resistance is done dim signal, first through microampere order constant-current source, make resistance dim signal convert the voltage signal of simulation to, resistance scope 10K ohm is to 100K ohm, convert the voltage signal of 1-10V to, if voltage signal or the pwm signal of the 1-10V of simulation, the D/A D/A conversion circuit forming through third-order low-pass filter again, send single-chip microcomputer (MCU) built-in the A/D analog-digital converter of 10 BIT, process, according to dim signal and driver output current relation, the built-in PWM module of single-chip microcomputer (MCU) is output pwm signal on request, control output current size.
The single-chip microcomputer of the utility model shown in Fig. 2 (MCU) power supply generation+5V power supply diagram.By standby power, provided+12V is after resistance R 30 and R31 current limliting, resistance R 29 is as the base biasing resistor of triode Q1, with IC3 AZ431, capacitor C 14, resistance R 20 and resistance R 21 form linear voltage-stabilizing circuit, output+5V power supply, then give single-chip microcomputer (MCU) power supply through electrochemical capacitor C19 and patch capacitor C15 filtering and inductance L 1.
The single-chip microcomputer of the utility model shown in Fig. 3 (MCU) online programming terminal circuit diagram, terminal J11 is single-chip microcomputer (MCU) online programming terminal, utilize the program that this interface can online modification single-chip microcomputer (MCU), realize the modification of LED street lamp driver non-essential resistance, voltage and PWM dim signal and driver output current graph of relation, and the isoparametric setting of the electric current of constant current.
Microampere order constant-current source circuit of the present utility model shown in Fig. 4, the A portion that comprises operational amplifier IC2, with resistance R 8, R9, C8, C5, R16, R17, R11, R10, constant output current 100uA, when external dimmer resistance is 10K ohm, voltage is 10KX100uA=1V, when external dimmer resistance is 100K ohm, voltage 100K X100uA=10V, external dimmer resistance dim signal just converts the voltage signal of 1-10V to like this.
The D/A D/A conversion circuit figure that shown in Fig. 5, third-order low-pass filter of the present utility model forms, operation principle is: the voltage signal that the signal that the resistance (R) of the voltage of external dimmer (V) signal or external dimmer is processed through microampere order constant-current source or square wave (PWM) the signal unification of external dimmer are simulated through 7 pin outputs of resistance R 26, capacitor C 9, resistance R 27, capacitor C 11 operational amplifier IC2B portions, then after resistance R 28, resistance R 18 dividing potential drops and capacitor C 10 filtering, send single-chip microcomputer (MCU) analog digital conversion mouthful AN0 to process.
MCU interface circuit figure of the present utility model shown in Fig. 6, single-chip microcomputer (MCU) oscillating circuit being formed by crystal oscillator Y1 and capacitor C 20, C21, opening or closing of single-chip microcomputer (MCU) 18 foot control light fixture processed, single-chip microcomputer (MCU) 6 pin are fault output indication ERR, single-chip microcomputer (MCU) 17 pin are responsible for processing external dimmer signal, no matter be the D/A digital analog converter that resistance, voltage or pwm signal process microampere order constant-current source and third-order low-pass filter form, convert unified analog voltage signal to.
Non-essential resistance light modulation and driver output current graph of a relation of the present utility model shown in Fig. 7, when external dimmer resistance is less than or equal to 10K ohm, output current is 10%, when external dimmer resistance is more than or equal to 90 K ohm, exports 100%.Between external dimmer resistance 1-90K ohm, output current is the linear ratio of 10-100%.
External voltage light modulation and driver output current graph of a relation of the present utility model shown in Fig. 8, when external dimmer voltage is less than or equal to 1V, output current is 10%, when being more than or equal to 9V, external dimmer voltage exports 100%, between external dimmer voltage 1-9V, output current is the linear ratio of 10-100%.
Outside PWM light modulation and driver output current graph of a relation of the present utility model shown in Fig. 9, when external dimmer PWM is less than or equal to 10%, output current is 10%, when being more than or equal to 90%, external dimmer voltage exports 100%, when external dimmer PWM is between 10-90%, output current is the linear ratio of 10-100%.
Claims (3)
1. the three-in-one LED Intelligent dimming circuit of resistance, voltage and PWM, it is characterized in that: described LED Intelligent dimming circuit comprises singlechip microprocessor unit power supply circuits, external dimmer resistance dim signal is converted to the microampere order constant-current circuit of voltage signal, the D/A D/A conversion circuit that three rank low-pass filtering form, and MCU interface circuit; Described singlechip microprocessor unit is built-in with PWM module, non-essential resistance makes resistance dim signal convert the voltage signal of simulation to through microampere order constant-current source, the D/A D/A conversion circuit forming through third-order low-pass filter again, after A/D analog-digital converter is processed, according to dim signal and driver output current relation, the built-in PWM module of single-chip microcomputer is output pwm signal on request, controls output current size.
2. the three-in-one LED Intelligent dimming circuit of resistance as claimed in claim 1, voltage and PWM, is characterized in that: described MCU interface circuit is the single-chip microcomputer oscillating circuit that crystal oscillator Y1 and capacitor C 20, C21 form.
3. the three-in-one LED Intelligent dimming circuit of resistance as claimed in claim 1, voltage and PWM, it is characterized in that: the D/A D/A conversion circuit that three described rank low-pass filtering form comprises resistance R 26, capacitor C 9, resistance R 27, capacitor C 11 operational amplifiers, resistance R 28, resistance R 18 dividing potential drops and capacitor C 10; The voltage signal that the signal that the voltage signal of external dimmer or the resistance of external dimmer are processed through microampere order constant-current source or the square wave pwm signal unification of external dimmer are simulated through 7 pin outputs of resistance R 26, capacitor C 9, resistance R 27, capacitor C 11 operational amplifier IC2B portions, then send single-chip simulation digital translation mouth to process after resistance R 28, resistance R 18 dividing potential drops and capacitor C 10 filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320201230.5U CN203466999U (en) | 2013-04-19 | 2013-04-19 | Resistance, voltage and PWM three-in-one LED intelligent dimming circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320201230.5U CN203466999U (en) | 2013-04-19 | 2013-04-19 | Resistance, voltage and PWM three-in-one LED intelligent dimming circuit |
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| CN203466999U true CN203466999U (en) | 2014-03-05 |
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| CN201320201230.5U Expired - Fee Related CN203466999U (en) | 2013-04-19 | 2013-04-19 | Resistance, voltage and PWM three-in-one LED intelligent dimming circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307360A (en) * | 2015-12-02 | 2016-02-03 | 上海航空电器有限公司 | Simulation PWM (Pulse-Width Modulation) light modulation output circuit |
| CN105472842A (en) * | 2015-12-02 | 2016-04-06 | 上海航空电器有限公司 | Analog-voltage light modulation output circuit |
| CN106658817A (en) * | 2016-09-30 | 2017-05-10 | 深圳市莱福德光电有限公司 | Dimming signal processing system applied to LED driving power supply |
| CN107463127A (en) * | 2017-07-28 | 2017-12-12 | 厦门乐人电子有限公司 | Light-adjustment film intelligent controller |
| CN109302773A (en) * | 2018-11-15 | 2019-02-01 | 常州格林照明股份有限公司 | A kind of LED projector lamp driving circuit |
-
2013
- 2013-04-19 CN CN201320201230.5U patent/CN203466999U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307360A (en) * | 2015-12-02 | 2016-02-03 | 上海航空电器有限公司 | Simulation PWM (Pulse-Width Modulation) light modulation output circuit |
| CN105472842A (en) * | 2015-12-02 | 2016-04-06 | 上海航空电器有限公司 | Analog-voltage light modulation output circuit |
| CN106658817A (en) * | 2016-09-30 | 2017-05-10 | 深圳市莱福德光电有限公司 | Dimming signal processing system applied to LED driving power supply |
| CN106658817B (en) * | 2016-09-30 | 2018-06-22 | 深圳莱福德科技股份有限公司 | A kind of dim signal processing system for LED drive power |
| CN107463127A (en) * | 2017-07-28 | 2017-12-12 | 厦门乐人电子有限公司 | Light-adjustment film intelligent controller |
| CN109302773A (en) * | 2018-11-15 | 2019-02-01 | 常州格林照明股份有限公司 | A kind of LED projector lamp driving circuit |
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Granted publication date: 20140305 Termination date: 20170419 |