CN101175355A - Intelligent high-power LED controller - Google Patents
Intelligent high-power LED controller Download PDFInfo
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- CN101175355A CN101175355A CNA2007101713044A CN200710171304A CN101175355A CN 101175355 A CN101175355 A CN 101175355A CN A2007101713044 A CNA2007101713044 A CN A2007101713044A CN 200710171304 A CN200710171304 A CN 200710171304A CN 101175355 A CN101175355 A CN 101175355A
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Abstract
The present invention relates to an intelligent high-power LED controller, which comprises a MCU central control unit, a clock circuit, a reset circuit, a controlling keyboard, a status display unit, a fault output and alarm circuit, a LIN bus interface, a photoelectric isolation driving unit and a plurality of LED driving unit. The clock circuit, the reset circuit, the controlling keyboard, the status display unit, the fault output and alarm circuit, the LIN bus interface and the photoelectric isolation driving unit are all mutually connected with the MCU central control unit. The MCU central control unit is mutually connected with the photoelectric isolation driving unit. The photoelectric isolation driving unit is mutually connected with a plurality of LED driving units. The LED driving units are mutually connected with each other and are connected respectively with a high-power LED array. Compared with the prior art, the present invention is characterized by high efficiency and multi-channel.
Description
Technical field
The present invention relates to the applied technical field that throws light on, particularly relate to a kind of intelligent high-power LED controller.
Background technology
Present great power LED control device all is single pass, can only control paths of LEDs output, and its control mode is single, and output current is fixed, can not dynamic adjustments.
Summary of the invention
Technical problem to be solved of the present invention provides a kind of efficient, multichannel intelligent high-power LED controller in order to overcome above-mentioned existing in prior technology defective exactly.
Purpose of the present invention can be achieved through the following technical solutions: intelligent high-power LED controller, it is characterized in that, and comprising:
MCU central controller as the control core;
Clock circuit is used to the MCU central controller that clock reference is provided;
Reset circuit is used to the MCU central controller that power-on reset signal is provided;
Supervisory keyboard is used for outside input;
Status display unit is used for the operating state and the demonstration of o controller;
Fault output and warning circuit are used for fault output and audible alarm;
The LIN bus interface is used to other system that interface is provided;
Photoelectricity isolation drive unit, the signal that is used to isolate the output of MCU central controller;
Several LED driver elements are used for controlling respectively the high-power LED array of respective numbers, and this LED driver element is by photoelectricity isolation drive unit controls;
Described clock circuit, reset circuit, supervisory keyboard, status display unit, fault output and warning circuit, LIN bus interface and photoelectricity isolation drive unit all interconnect with the MCU central controller, this MCU central controller and photoelectricity isolation drive unit interconnect, this photoelectricity isolation drive unit and several LED driver elements interconnect, and these several LED driver elements interconnect and also are connected with a high-power LED array respectively.
Described LED driver element comprises core controller, precision comparator, standard signal generator, the PWM output circuit, voltage current conversion and output driving circuit, current detection circuit, low noise amplifier circuit, protective circuit, described core controller and precision comparator, standard signal generator and PWM output circuit interconnect, described standard signal generator and precision comparator interconnect, described PWM output circuit by voltage current conversion and output driving circuit and a high-power LED array interconnect, this high-power LED array is through current detection circuit, interconnect with core controller behind the low noise amplifier circuit, described current detection circuit and low noise amplifier circuit all interconnect with protective circuit, and this protective circuit and core controller interconnect;
From the pwm control signal of outside and the standard clock signal of standard signal generator generation; be input to precision comparator simultaneously; carry out voltage and bit comparison mutually; produce difference signal and give core controller; give the PWM output circuit by core controller through calculating back output pwm control signal; produce big electric current supply led array through voltage/current conversion and output driving circuit then and carry out luminous demonstration; the real work electric current of led array is through the detection of dynamic of overcurrent sensing circuit; output feedback signal is given low noise amplifier circuit and protective circuit respectively; low noise amplifier circuit with LED operating current feedback signal amplify with noise reduction process after; give core controller; carrying out dynamic current follows the tracks of and adjusting control; protective circuit determines according to LED operating current feedback signal whether the LED operating current of this moment transfinites; when being short-circuited or overcurrent when output; protective circuit will produce the fault interrupt signal; give core controller and propose the system protection control request; core controller is correspondingly taked the protection action; stop PWM output, and then close the electric current output of LED.
Described controller comprises eight LED driver elements, is connected with a high-power LED array respectively.
Described MCU central controller adopts single-chip microcomputer MM908E626.
Compared with prior art, the present invention can control the output of eight road great power LEDs simultaneously, owing to adopted the MCU central controller, make system intelligent more, the operating current of eight passages can carry out dynamic adjustments, independent fully each other control, avoided influencing each other, in order to reduce the influence of system noise to output current, adopted photoelectric isolating circuit to carry out isolated controlling between MCU central controller and led driver, thereby improved the control stability and the reliability of system, the embedded LIN bus interface of the present invention makes the present invention be easy to be connected with other system or equipment, made things convenient for the expansion of the system integration and function, main feature of the present invention is:
The MCU integrated design;
The digital PWM mode is carried out the LED luminance dynamic and is regulated;
Multi-channel parallel output (maximum 8 road export synchronously);
Has the LIN bus interface;
The present invention adopts the great power LED special driving chip of wide operating voltage range to design, this led controller has 1000: 1 dimming scope, support analog form and digital PWM mode to carry out brightness adjustment control, the present invention adopts the digital PWM mode to carry out brightness adjustment control, realize the current stabilization control and the dynamic adjustments of LED luminous intensity, its advantage is when guaranteeing that colour temperature is stable, realizes the dynamic adjustments of luminous intensity; The present invention has many advantages, makes it be fit to very much great power LED and drives:
Super wide input voltage range: 6V-76V;
Chip integration becomes LED operating current detecting amplifier;
Lofty tone light ratio: 1000: 1;
Have LED work and allow/close input control;
The support external clock is synchronous, can realize multicore chip level joint control system;
Have load changing overvoltage protection, peak current limit, LED short-circuit protection, the protection of LED superhigh temperature;
Operating temperature range is wide :-40---+125 ℃.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of LED driver element of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, 2, intelligent high-power LED controller comprises:
MCU central controller 1 as the control core;
Clock circuit 2 is used to the MCU central controller that clock reference is provided;
Supervisory keyboard 4 is used for outside input;
Fault output and warning circuit 6 are used for fault output and audible alarm;
Photoelectricity isolation drive unit 8, the signal that is used to isolate the output of MCU central controller;
Several LED driver elements 9～16 are used for controlling respectively the high-power LED array of respective numbers, and this LED driver element is by photoelectricity isolation drive unit controls;
Described clock circuit, reset circuit, supervisory keyboard, status display unit, fault output and warning circuit, LIN bus interface and photoelectricity isolation drive unit all interconnect with the MCU central controller, this MCU central controller and photoelectricity isolation drive unit interconnect, this photoelectricity isolation drive unit and several LED driver elements interconnect, and these several LED driver elements interconnect and also are connected with a high-power LED array respectively.
Described LED driver element comprises core controller 17, precision comparator 18, standard signal generator 19, PWM output circuit 20, voltage current conversion and output driving circuit 21, current detection circuit 22, low noise amplifier circuit 23, protective circuit 24, described core controller and precision comparator, standard signal generator and PWM output circuit interconnect, described standard signal generator and precision comparator interconnect, described PWM output circuit by voltage current conversion and output driving circuit and a high-power LED array interconnect, this high-power LED array is through current detection circuit, interconnect with core controller behind the low noise amplifier circuit, described current detection circuit and low noise amplifier circuit all interconnect with protective circuit, and this protective circuit and core controller interconnect;
From the pwm control signal of outside and the standard clock signal of standard signal generator generation, be input to precision comparator simultaneously, carry out voltage and bit comparison mutually, produce difference signal and give core controller, give the PWM output circuit by core controller through calculating back output pwm control signal, produce big electric current supply led array through voltage/current conversion and output driving circuit then and carry out luminous demonstration, the real work electric current of led array is through the detection of dynamic of overcurrent sensing circuit, output feedback signal is given low noise amplifier circuit and protective circuit respectively, low noise amplifier circuit with LED operating current feedback signal amplify with noise reduction process after, give core controller, carrying out dynamic current follows the tracks of and adjusting control, protective circuit determines according to LED operating current feedback signal whether the LED operating current of this moment transfinites, when being short-circuited or overcurrent when output, protective circuit will produce the fault interrupt signal, give core controller and propose the system protection control request, core controller is correspondingly taked the protection action, stop PWM output, and then close the electric current output of LED; Described controller comprises eight LED driver elements, is connected with a high-power LED array respectively; Described MCU central controller rice single-chip microcomputer MM908E626.
Multiple-passage large power LED control device of the present invention is become by several LED driver element cascades.
The core component of multiple-passage large power LED control device of the present invention is selected the special-purpose single-chip microcomputer MM908E626 of high reliability for use, and its operating temperature range is wide :-40---+115 ℃.This MCU internal resource is abundant, has 16K in-chip FLASH, 512 byte ram in slice, 2 16 binary channels timers, internal clocking CGM module, 10 A/D converters, enhancement mode UART interface (ESCI), SPI interface, LIN interface etc.The present invention selects the controller of MM908E626 as the multi-functional high-power LED control device for use, has reserved rich in natural resources for the upgrading of product, especially is convenient to carry out the system intelligent design.Eight great power LEDs drive passage and independently control, and can carry out dynamic current output and regulate.MCU is provided with requirement according to input, exports eight tunnel different pwm control signals respectively, and control eight paths of LEDs drivers carry out the LED brilliance control after photoelectricity is isolated.The present invention utilizes the embedded LIN interface module of MCU to realize external general LIN bus interface, realizes the cascade and intelligent control of system by certain software communication agreement, can easily apparatus of the present invention be integrated into other internal system.
Photoelectricity isolation drive unit is connected with the MCU central controller, the output signal of MCU central controller is carried out photoelectricity isolate, and controls one to eight work of LED driver element respectively; The corresponding respectively control high-power LED array one to eight of LED driver element one to eight, they are power output units of system.
The present invention is by the MCU integrated design, utilize the MCU central controller to produce the multi-channel PWM control signal, carry out the photoelectricity isolation of control signal through photoelectric isolated driver after, driving LED driver one to eight is realized the light intensity control to the different LED array respectively, the brightness output of dynamic adjustments led array one to eight, the light distribution that produces multiple various combination.On the other hand, the LIN bus interface that the present invention reserves, make this controller be highly susceptible to inserting other system, for example as the light source controller of car headlamp, being connected to the automobile control bus, being convenient to automobile and totally controlling, also is the intelligent AFS design of car headlamp, lay the foundation, providing may.
Claims (4)
1. intelligent high-power LED controller is characterized in that, comprising:
MCU central controller as the control core;
Clock circuit is used to the MCU central controller that clock reference is provided;
Reset circuit is used to the MCU central controller that power-on reset signal is provided;
Supervisory keyboard is used for outside input;
Status display unit is used for the operating state and the demonstration of o controller;
Fault output and warning circuit are used for fault output and audible alarm;
The LIN bus interface is used to other system that interface is provided;
Photoelectricity isolation drive unit, the signal that is used to isolate the output of MCU central controller;
Several LED driver elements are used for controlling respectively the high-power LED array of respective numbers, and this LED driver element is by photoelectricity isolation drive unit controls;
Described clock circuit, reset circuit, supervisory keyboard, status display unit, fault output and warning circuit, LIN bus interface and photoelectricity isolation drive unit all interconnect with the MCU central controller, this MCU central controller and photoelectricity isolation drive unit interconnect, this photoelectricity isolation drive unit and several LED driver elements interconnect, and these several LED driver elements interconnect and also are connected with a high-power LED array respectively.
2. intelligent high-power LED controller according to claim 1; it is characterized in that; described LED driver element comprises core controller; precision comparator; standard signal generator; the PWM output circuit; voltage current conversion and output driving circuit; current detection circuit; low noise amplifier circuit; protective circuit; described core controller and precision comparator; standard signal generator and PWM output circuit interconnect; described standard signal generator and precision comparator interconnect; described PWM output circuit by voltage current conversion and output driving circuit and a high-power LED array interconnect; this high-power LED array is through current detection circuit; interconnect with core controller behind the low noise amplifier circuit; described current detection circuit and low noise amplifier circuit all interconnect with protective circuit, and this protective circuit and core controller interconnect.
3. intelligent high-power LED controller according to claim 1 and 2 is characterized in that, described controller comprises eight LED driver elements, is connected with a high-power LED array respectively.
4. intelligent high-power LED controller according to claim 3 is characterized in that, described MCU central controller adopts single-chip microcomputer MM908E626.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101713044A CN101175355A (en) | 2007-11-29 | 2007-11-29 | Intelligent high-power LED controller |
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| CNA2007101713044A CN101175355A (en) | 2007-11-29 | 2007-11-29 | Intelligent high-power LED controller |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636019A (en) * | 2008-07-24 | 2010-01-27 | 颜睿志 | Active multi-channel LED driving power source system |
| CN101666455A (en) * | 2008-09-04 | 2010-03-10 | 福特全球技术公司 | Ambient LED lighting system and method |
| CN101938876A (en) * | 2010-09-19 | 2011-01-05 | 无锡力芯微电子股份有限公司 | Led drive circuit |
| CN102182985A (en) * | 2011-03-15 | 2011-09-14 | 中山伟强科技有限公司 | Indoor lighting system based on network control |
| CN102278624A (en) * | 2011-05-17 | 2011-12-14 | 南京安达泰星电子有限公司 | LED (light-emitting diode) light source for module type constant current source and module type LED lightening unit |
| CN101592304B (en) * | 2009-05-05 | 2014-06-11 | 威海东兴电子有限公司 | Intelligent fire emergency lamp with MCU control |
| CN104515609A (en) * | 2013-09-26 | 2015-04-15 | 深圳市海洋王照明工程有限公司 | Temperature control circuit and LED illuminating device |
| CN104883797A (en) * | 2015-06-11 | 2015-09-02 | 中国地质大学（武汉） | Large-scale LED array light modulation control method and light modulation control system |
| CN104924977A (en) * | 2015-07-17 | 2015-09-23 | 北京汽车研究总院有限公司 | LED driver, LED drive system and LED drive device |
| CN108337775A (en) * | 2018-03-01 | 2018-07-27 | 安徽省东超科技有限公司 | A kind of the lamp house panel system and its control method of detectable LED lamp panel failure |
-
2007
- 2007-11-29 CN CNA2007101713044A patent/CN101175355A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636019A (en) * | 2008-07-24 | 2010-01-27 | 颜睿志 | Active multi-channel LED driving power source system |
| CN101636019B (en) * | 2008-07-24 | 2013-07-03 | 颜睿志 | Active multi-channel LED driving power source system |
| CN101666455A (en) * | 2008-09-04 | 2010-03-10 | 福特全球技术公司 | Ambient LED lighting system and method |
| CN101592304B (en) * | 2009-05-05 | 2014-06-11 | 威海东兴电子有限公司 | Intelligent fire emergency lamp with MCU control |
| CN101938876A (en) * | 2010-09-19 | 2011-01-05 | 无锡力芯微电子股份有限公司 | Led drive circuit |
| CN101938876B (en) * | 2010-09-19 | 2013-03-13 | 无锡力芯微电子股份有限公司 | Led drive circuit |
| CN102182985A (en) * | 2011-03-15 | 2011-09-14 | 中山伟强科技有限公司 | Indoor lighting system based on network control |
| CN102278624A (en) * | 2011-05-17 | 2011-12-14 | 南京安达泰星电子有限公司 | LED (light-emitting diode) light source for module type constant current source and module type LED lightening unit |
| CN104515609A (en) * | 2013-09-26 | 2015-04-15 | 深圳市海洋王照明工程有限公司 | Temperature control circuit and LED illuminating device |
| CN104883797A (en) * | 2015-06-11 | 2015-09-02 | 中国地质大学（武汉） | Large-scale LED array light modulation control method and light modulation control system |
| CN104924977A (en) * | 2015-07-17 | 2015-09-23 | 北京汽车研究总院有限公司 | LED driver, LED drive system and LED drive device |
| CN108337775A (en) * | 2018-03-01 | 2018-07-27 | 安徽省东超科技有限公司 | A kind of the lamp house panel system and its control method of detectable LED lamp panel failure |
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Open date: 20080507 |