CN104302060A - Control device of LED driving power supply - Google Patents
Control device of LED driving power supply Download PDFInfo
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- CN104302060A CN104302060A CN201410579208.3A CN201410579208A CN104302060A CN 104302060 A CN104302060 A CN 104302060A CN 201410579208 A CN201410579208 A CN 201410579208A CN 104302060 A CN104302060 A CN 104302060A
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Abstract
The invention relates to the technical field of control over driving power supplies, and provides a control device of an LED driving power supply. The control device of the LED driving power supply comprises an input module, a controller, at least one rectification module, a driving module and an LED lamp, wherein the rectification modules are connected in parallel to form a rectification module block, the input module provides alternating current electric signals for the rectification module block, the rectification module block converts alternating current into direct current and outputs the direct current to the driving module, and the driving module drives the LED lamp. The controller adjusts output current of the driving module to reach a first preset value, so that the brightness of the LED lamp is reduced, the brightness of the LED lamp is adjusted when people are fewer at night, the LED lamp is made to become dark, when the LED lamp works at a certain brightness value, input signals and output signals of the rectification modules are monitored, and the efficiency of an entire grid system is controlled according to the input signals and the output signals, so that the efficiency at the optimal state is obtained.
Description
Technical field
The present invention relates to driving power control technology field, particularly relate to a kind of LED drive power control device.
Background technology
At present, due to the advantage of efficient energy-saving, the application of LED is also more and more extensive, compared to conventional light source, the LED life-span is long, under same power, illuminating effect more energy-conservation than traditional light source more than 80%, LED lamplight is a kind of green light source simultaneously, and environment protecting is better, particularly LED is widely used on street lamp, but when people late at night is few, be not too many to the demand of street lamp, LED kept constant brightness can produce certain waste, therefore, street lamp power supply, road lamp power supply system can dim street lamp brightness when people late at night is few.The method used in prior art is the Energy transmission reducing LED driving power, such as reduce the switching frequency of switch PWM duty ratio or raising LED driving power, the shortcoming of this scheme is after LED is turned down brightness, LED driving power is not quota power stage, usually the efficiency of driving power is not optimization in this case, cannot reach whole electric power system efficiency optimization effect.In sum, to keep brightness constant and brightness is turned down the power consumption efficiency of rear electric power system not high problem when LED is employed even if exist in prior art.
Summary of the invention
The object of the present invention is to provide a kind of LED drive power control device, to keep brightness constant and brightness is turned down the not high problem of the power consumption efficiency of rear electric power system even if be intended to solve when LED is employed for existing in prior art.
The present invention is achieved in that a kind of LED drive power control device, and described LED drive power control device comprises input module, controller, at least one rectification module, driver module and LED;
At least one rectification module described is connected in parallel and forms rectification module group, the output of described input module connects the input of described rectification module group and the first input end of described controller, the output of described rectification module group connects the input of described driver module, described input module provides ac signal to described rectification module group, described AC conversion is direct current and exports to described driver module by described rectification module group, and described driving optical module drives described LED;
First output of described controller connects the control end of described rectification module group, second input of described controller connects the output of described rectification module group, second output of described controller connects the control end of described driver module, and what described controller reduced described driver module when extraneous light is dimmed according to described light signal outputs current to the first preset value.
Described controller progressively controls the output voltage of rectification module according to the input power of described rectification module group and power output, and the power output calculating described rectification module is to obtain the minimum value of described power output, the power output adjusting described rectification module is the minimum value of described power output, makes described rectification module export output voltage corresponding to the minimum value of described power output.
Described LED drive power control device also comprises current sampling circuit, the input of described current sampling circuit connects the output of described input module, the output of described current sampling circuit connects the four-input terminal of described controller, and what described controller adjusted described driver module outputs current to the first preset value to reduce the brightness of described LED.
Described current sampling circuit comprises the 39 resistance, the 42 resistance, the 43 resistance, the 45 resistance, the 19 electric capacity, the 21 electric capacity, the 22 electric capacity and the 5th amplifier and the 6th amplifier;
The first end of described 42 resistance is the input of described current sampling circuit, second end of described 42 resistance connects the first end of described 39 resistance, the first end of described 19 electric capacity and the inverting input of described 5th amplifier, second end ground connection of described 19 electric capacity, second end of described 39 resistance connects the output of described 5th amplifier and the first end of described 43 resistance, the in-phase input end of described 5th amplifier connects the first end of described 45 resistance, second end ground connection of described 45 resistance, the voltage input end of described 5th amplifier connects the first end of high level and described 21 electric capacity, second end ground connection of described 21 electric capacity, second end of described 43 resistance connects the in-phase input end of described 6th amplifier and the first end of described 22 electric capacity, second end ground connection of described 22 electric capacity, the inverting input of described 6th amplifier connects the output of described 6th amplifier, the output of described 6th amplifier is the output of described current sampling circuit.
Described LED drive power control device also comprises voltage sampling circuit, the input of described voltage sampling circuit connects the output of described input module, the output of described voltage sampling circuit connects of described controller without input, and described controller gathers the output voltage of described input module according to described voltage sampling circuit.
Described voltage sampling circuit comprises the 25 resistance, the 26 resistance, the 12 electric capacity, the first voltage-stabiliser tube and the second voltage-stabiliser tube;
The first end of described 25 resistance connects the first end of the 26 resistance and forms the input of described voltage sampling circuit, second end ground connection of described 26 resistance, second end of described 25 resistance connects the negative electrode of the first end of described 12 electric capacity, the negative electrode of described first voltage-stabiliser tube and described second voltage-stabiliser tube, the anode of the second end of described 12 electric capacity, the anode of described first voltage-stabiliser tube and described second voltage-stabiliser tube connects altogether, and the second end of described 25 resistance is the output of described voltage sampling circuit.
Described input module comprises surge protection module and EMMC filtration module.
Described driver module is at least two, and described at least two driver modules are connected in parallel, and each driver module connects a LED.
A kind of LED drive power control device provided by the invention, the brightness of LED is adjusted when people late at night is few, make its brightness dimmed, and under a certain brightness of LED, can by the input signal of monitoring rectification module and output signal, the efficiency of whole network system is calculated, to obtain the state of efficiency optimization according to input signal and output signal.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the LED drive power control device that an embodiment of the present invention provides;
Fig. 2 is the structural representation of the LED drive power control device that the another kind of embodiment of the present invention provides;
Fig. 3 is the circuit diagram of the LED drive power control device middle controller that an embodiment of the present invention provides;
Fig. 4 is the circuit diagram of current sampling circuit in the LED drive power control device that provides of an embodiment of the present invention;
Fig. 5 is the circuit diagram of voltage sampling circuit in the LED drive power control device that provides of an embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In order to technical scheme of the present invention is described, be described below by specific embodiment.
An embodiment of the present invention provides a kind of LED drive power control device, and as shown in Figure 1, LED drive power control device comprises input module 101, controller 103, at least one rectification module, driver module 104 and LED 105;
At least one rectification module is connected in parallel and forms rectification module group 102, the output of input module 101 connects the input of rectification module group 102 and the first input end of controller 103, the output of rectification module group 102 connects the input of driver module 104, input module 101 provides ac signal to rectification module group 102, AC conversion is direct current and exports to driver module 104 by rectification module group 102, drives optical module driving LED lamp 105;
First output of controller 103 connects the control end of rectification module group 102, second input of controller 103 connects the output of rectification module group 102, second output of controller 103 connects the control end of driver module 104, and what controller 103 adjusted driver module 104 outputs current to the first preset value to reduce the brightness of LED 105.
First said process carries out light modulation to LED drive power, its main purpose is exactly the brightness of LED 105 dimmed, because do not need too high brightness time such as the late into the night, people was few at some time, in order to energy savings needs the brightness of LED 105 to dim, concrete, communicated with driver module 104 by controller 103, the electric current that controller 103 driver module 104 pairs of LED 105 export is decreased to a certain preset value to reduce the brightness of LED 105 tool, after light modulation terminates, the luminous energy of whole electrical network exports just to be decided, the gross power of one or more driver modules 104 of LED 105 just immobilizes.Therefore, the power that controller 103 now controls to export to driver module 104 is minimum, can realize the efficiency optimization of whole electrical network.
Further, controller 103 controls the output of rectification module according to the input power of rectification module group 102, and the power output calculating rectification module is to obtain the minimum value of power output, the power output of adjustment rectification module group is the minimum value of power output, makes rectification module group export output voltage corresponding to the minimum value of this power output.
Concrete, after each paths of LEDs lamp 105 modulated light is stable, namely when controller 103 adjust driver module 104 output current to the first preset value time, controller 103 communicates with rectification module, obtain the input ac voltage of rectification module, electric current and power factor calculate input power, and obtain the output dc voltage of rectification module further and export direct current information, calculate power output, rectification module output voltage is progressively controlled according to input power value and power output with Time Controller 103, concrete, the method of controller being carried out to software control can be adopted, the output reference voltage to rectification module group is exported by controller, to adjust the output voltage of rectification module group according to predetermined step change, controller calculates the power output of rectification module until find the minimum value of power output one by one by the electric current detecting the output of rectification module group, and the power output adjusting rectification module is minimum value, even if rectification module group exports the output voltage corresponding to the minimum value of this power output, now can realize the peak efficiency of whole electrical network.
Concrete, controller can comprise microprocessor (MCU), this MCU can comprise CPU (Central Processing Unit, CPU), read-only memory module (read-only memory, ROM), random memory module (random access memory, RAM), time block, digital-to-analogue conversion module (A/D converter) and plural I/O.Certainly, controller also can adopt the integrated circuit of other form, as: application-specific IC (Application Specific ntegrated Circuit, or field programmable gate arrays (Field Programmable Gate Array, FPGA) etc. ASIC).
As shown in Figure 3, for in a kind of embodiment of controller, the voltage that its 14 pin exports for gathering output module, the electric current that its 15 pin exports for gathering output module, the electric current that its 11 pin exports for gathering rectification module, the voltage that its 12 pin exports for gathering rectification module, its 8th pin is the output connecting rectification module control end, to set the output-current rating of rectification module.
Further, LED drive power control device also comprises current sampling circuit 107, the input of current sampling circuit 107 connects the output of input module 101,3rd input of the output connection control device 103 of current sampling circuit 107, controller 103 is according to the output current of current sampling circuit Gather and input module 101.
Concrete, as shown in Figure 4, current sampling circuit 107 comprises the 39 resistance R39, the 42 resistance R42, the 43 resistance R43, the 45 resistance R45, the 19 electric capacity C19, the 21 electric capacity C21, the 22 electric capacity C22 and the 5th amplifier U5A and the 6th amplifier U5B;
The first end of the 42 resistance R42 is the input of current sampling circuit 107, second end of the 42 resistance R42 connects the first end of the 39 resistance R39, the first end of the 19 electric capacity C19 and the inverting input of the 5th amplifier U5A, the second end ground connection of the 19 electric capacity C19, second end of the 39 resistance R39 connects the output of the 5th amplifier and the first end of the 43 resistance R43, the in-phase input end of the 5th amplifier U5A connects the first end of the 45 resistance R45, the second end ground connection of the 45 resistance R45, the voltage input end of the 5th amplifier U5A connects the first end of high level and the 21 electric capacity C21, the second end ground connection of the 21 electric capacity C21, second end of the 43 resistance R43 connects the in-phase input end of the 6th amplifier and the first end of the 22 electric capacity C22, the second end ground connection of the 22 electric capacity C22, the inverting input of the 6th amplifier U5B connects the output of the 6th amplifier, the output of the 6th amplifier U5B is the output of current sampling circuit 107.
The first end of the 42 resistance R42 connects the output of output module 101, is gathered the output current of output module 101 by the 5th amplifier U5A, then exports to controller 103 after being amplified the current signal gathered by the 6th amplifier U5B.
Further, LED drive power control device also comprises voltage sampling circuit 108, the input of voltage sampling circuit 108 connects the output of input module 101, the four-input terminal of the output connection control device 103 of voltage sampling circuit 108, controller 103 is according to the output voltage of voltage sampling circuit Gather and input module 101.
Voltage sampling circuit 108 comprises the 25 resistance R25, the 26 resistance R26, the 12 electric capacity C12, the first voltage-stabiliser tube D4 and the second voltage-stabiliser tube TVS2;
The first end of the 25 resistance R25 connects the first end of the 26 resistance R26 and forms the input of voltage sampling circuit, the second end ground connection of the 26 resistance R26, second end of the 25 resistance R25 connects the negative electrode of the first end of the 12 electric capacity C12, the negative electrode of the first voltage-stabiliser tube D4 and the second voltage-stabiliser tube TVS2, the anode of second end of the 12 electric capacity C12, the anode of the first voltage-stabiliser tube D4 and the second voltage-stabiliser tube TVS2 connects altogether, and second end of the 25 resistance R25 is the output of voltage sampling circuit 108.
The first end of the 25 resistance R25 connects the output of output module, by the 26 resistance R26, current conversion is become voltage, and voltage signal is exported to controller 103.
Further, input module 101 comprises surge protection module and EMC filtration module.
Concrete; AC power supplies is connected with the input of protection module of surging; in order to surge, protection module provides input voltage signal, carries out harmonic filtration and electromagnetic interference filtering after AC power source signal access respectively through surge protection module and EMC filtration module, ensure power supply signal without noise jamming.
Further, driver module 104 is at least two, and at least two driver modules 104 are connected in parallel, and each driver module 104 connects a LED 105.
A kind of LED drive power control device provided by the invention, the brightness of LED is being adjusted when people late at night is few, make its brightness dimmed, and under a certain brightness of LED, can by the input signal of monitoring rectification module and output signal, the efficiency of whole network system is calculated by feeding back respective ac input voltage and current information to controller according to input signal and output signal, DC output voltage and current information, controller is according to these information, calculate the efficiency of whole network system, control rectification module output dc voltage with Time Controller slowly to change, find the state of efficiency optimization.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; make some equivalent alternative or obvious modification without departing from the inventive concept of the premise; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (8)
1. a LED drive power control device, is characterized in that, described LED drive power control device comprises input module, controller, at least one rectification module, driver module and LED;
At least one rectification module described is connected in parallel and forms rectification module group, the output of described input module connects the input of described rectification module group and the first input end of described controller, the output of described rectification module group connects the input of described driver module, described input module provides ac signal to described rectification module group, described AC conversion is direct current and exports to described driver module by described rectification module group, and described driving optical module drives described LED;
First output of described controller connects the control end of described rectification module group, second input of described controller connects the output of described rectification module group, second output of described controller connects the control end of described driver module, and what described controller adjusted described driver module outputs current to the first preset value to reduce the brightness of described LED.
2. LED drive power control device as claimed in claim 1, it is characterized in that, described controller progressively controls the output voltage of rectification module according to the input power of described rectification module group and power output, and the power output calculating described rectification module is to obtain the minimum value of described power output, the power output adjusting described rectification module group is the minimum value of described power output, makes described rectification module group export the output voltage corresponding to minimum value of described power output.
3. LED drive power control device as claimed in claim 1, it is characterized in that, described LED drive power control device also comprises current sampling circuit, the input of described current sampling circuit connects the output of described input module, the output of described current sampling circuit connects the four-input terminal of described controller, and described controller gathers the output current of described input module according to described current sampling circuit.
4. LED drive power control device as claimed in claim 1, it is characterized in that, described current sampling circuit comprises the 39 resistance, the 42 resistance, the 43 resistance, the 45 resistance, the 19 electric capacity, the 21 electric capacity, the 22 electric capacity and the 5th amplifier and the 6th amplifier;
The first end of described 42 resistance is the input of described current sampling circuit, second end of described 42 resistance connects the first end of described 39 resistance, the first end of described 19 electric capacity and the inverting input of described 5th amplifier, second end ground connection of described 19 electric capacity, second end of described 39 resistance connects the output of described 5th amplifier and the first end of described 43 resistance, the in-phase input end of described 5th amplifier connects the first end of described 45 resistance, second end ground connection of described 45 resistance, the voltage input end of described 5th amplifier connects the first end of high level and described 21 electric capacity, second end ground connection of described 21 electric capacity, second end of described 43 resistance connects the in-phase input end of described 6th amplifier and the first end of described 22 electric capacity, second end ground connection of described 22 electric capacity, the inverting input of described 6th amplifier connects the output of described 6th amplifier, the output of described 6th amplifier is the output of described current sampling circuit.
5. LED drive power control device as claimed in claim 1, it is characterized in that, described LED drive power control device also comprises voltage sampling circuit, the input of described voltage sampling circuit connects the output of described input module, the output of described voltage sampling circuit connects the 5th input of described controller, and described controller gathers the output voltage of described input module according to described voltage sampling circuit.
6. LED drive power control device as claimed in claim 1, it is characterized in that, described voltage sampling circuit comprises the 25 resistance, the 26 resistance, the 12 electric capacity, the first voltage-stabiliser tube and the second voltage-stabiliser tube;
The first end of described 25 resistance connects the first end of the 26 resistance and forms the input of described voltage sampling circuit, second end ground connection of described 26 resistance, second end of described 25 resistance connects the negative electrode of the first end of described 12 electric capacity, the negative electrode of described first voltage-stabiliser tube and described second voltage-stabiliser tube, the anode of the second end of described 12 electric capacity, the anode of described first voltage-stabiliser tube and described second voltage-stabiliser tube connects altogether, and the second end of described 25 resistance is the output of described voltage sampling circuit.
7. LED drive power control device as claimed in claim 1, it is characterized in that, described input module comprises surge protection module and EMC filtration module.
8. LED drive power control device as claimed in claim 1, it is characterized in that, described driver module is at least two, and described at least two driver modules are connected in parallel, and each driver module connects a LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579208.3A CN104302060B (en) | 2014-10-24 | 2014-10-24 | A kind of LED drive power control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579208.3A CN104302060B (en) | 2014-10-24 | 2014-10-24 | A kind of LED drive power control device |
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| CN104302060A true CN104302060A (en) | 2015-01-21 |
| CN104302060B CN104302060B (en) | 2017-03-29 |
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| CN201410579208.3A Expired - Fee Related CN104302060B (en) | 2014-10-24 | 2014-10-24 | A kind of LED drive power control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128367A (en) * | 2016-07-28 | 2016-11-16 | 刘超 | A kind of backlight control circuit |
| TWI777578B (en) * | 2021-05-26 | 2022-09-11 | 台達電子工業股份有限公司 | An led power control device with precise control ability of tiny current and control method of the same |
| CN115413084A (en) * | 2021-05-26 | 2022-11-29 | 台达电子工业股份有限公司 | LED power supply control device and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120236456A1 (en) * | 2011-03-17 | 2012-09-20 | Yu Chung-Che | Transistor circuit with protecting function |
| CN202488799U (en) * | 2011-10-14 | 2012-10-10 | 欧司朗股份有限公司 | Illumination system |
| CN103354685A (en) * | 2013-07-22 | 2013-10-16 | 广州晶锐信息技术有限公司 | LED driving chip |
-
2014
- 2014-10-24 CN CN201410579208.3A patent/CN104302060B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120236456A1 (en) * | 2011-03-17 | 2012-09-20 | Yu Chung-Che | Transistor circuit with protecting function |
| CN202488799U (en) * | 2011-10-14 | 2012-10-10 | 欧司朗股份有限公司 | Illumination system |
| CN103354685A (en) * | 2013-07-22 | 2013-10-16 | 广州晶锐信息技术有限公司 | LED driving chip |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128367A (en) * | 2016-07-28 | 2016-11-16 | 刘超 | A kind of backlight control circuit |
| TWI777578B (en) * | 2021-05-26 | 2022-09-11 | 台達電子工業股份有限公司 | An led power control device with precise control ability of tiny current and control method of the same |
| CN115413084A (en) * | 2021-05-26 | 2022-11-29 | 台达电子工业股份有限公司 | LED power supply control device and control method thereof |
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| CN104302060B (en) | 2017-03-29 |
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