CN104302060B - A kind of LED drive power control device - Google Patents
A kind of LED drive power control device Download PDFInfo
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- CN104302060B CN104302060B CN201410579208.3A CN201410579208A CN104302060B CN 104302060 B CN104302060 B CN 104302060B CN 201410579208 A CN201410579208 A CN 201410579208A CN 104302060 B CN104302060 B CN 104302060B
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Abstract
The present invention relates to driving power supply control technology field, a kind of LED drive power control device of present invention offer, LED drive power control device include input module, controller, at least one rectification module, drive module and LED；At least one rectification module is connected in parallel to form rectification module group, and input module provides ac signal to rectification module group, and AC conversion is unidirectional current and is exported to drive module by rectification module group, drives optical module to drive LED；Controller adjustment drive module outputs current to the first preset value to reduce the brightness of the LED, 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 pass through to monitor the input signal and output signal of rectification module, according to input signal and the efficiency of the whole network system of output signal control adjustment, to obtain the state of efficiency optimization.
Description
Technical field
The present invention relates to driving power supply control technology field, more particularly 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, LED
Life-span length, under same power, illuminating effect is than traditional light source energy-conservation more than 80%, while LED lamplight is a kind of green light source,
Environment protecting more preferably, is particularly widely used in LED on street lamp, but when people late at night is few, the demand to street lamp
It is not too many, LED holding constant brightness can be produced into certain waste, therefore, street lamp power supply, road lamp power supply system can be when people late at night be few
Time dims street lamp brightness.Method used in prior art is to reduce the energy output of LED driving power supply, for example, reduce switch
The switching frequency of PWM duty cycle or raising LED driving power supply, the shortcoming of this scheme is that LED is turned down after brightness, LED
Lamp driving power source is not quota power output, and generally the efficiency of driving power supply is not optimization in this case, cannot be reached
Whole electric power system efficiency optimization effect.In sum, exist in prior art when LED is employed keep brightness it is constant with
Even and if the problem that brightness is turned down rear electric power system power consumption efficiency is not high.
The content of the invention
It is an object of the invention to provide a kind of LED drive power control device, it is intended to solve for depositing in prior art
Even if the not high problem of the power consumption efficiency of electric power system after keeping when LED is employed brightness constant and turning down brightness.
The present invention is achieved in that a kind of LED drive power control device, the LED drive power control device bag
Include input module, controller, at least one rectification module, drive module and LED；
At least one rectification module is connected in parallel to form rectification module group, the outfan connection of the input module
The first input end of the input and the controller of the rectification module group, the outfan connection of the rectification module group are described
The input of drive module, the input module provide ac signal to the rectification module group, and the rectification module group will
The AC conversion is unidirectional current and exports to the drive module that the driving optical module drives the LED；
First outfan of the controller connects the control end of the rectification module group, the second input of the controller
The outfan of the end connection rectification module group, the second outfan of the controller connect the control end of the drive module,
The controller reduces the outputing current to of the drive module according to the optical signal when extraneous light is dimmed first to be preset
Value.
The controller progressively controls the defeated of rectification module according to the input power and output of the rectification module group
Go out voltage, and the output of the rectification module is calculated to obtain the minima of the output, adjust the rectification mould
The output of block is the minima of the output, makes the minima institute of the rectification module output output right
The output voltage answered.
The LED drive power control device also includes current sampling circuit, and the input of the current sampling circuit connects
The outfan of the input module is connect, the outfan of the current sampling circuit connects the 4th input of the controller, institute
State controller and adjust the drive module and output current to the first preset value to reduce the brightness of the LED.
The current sampling circuit includes the 39th resistance, the 42nd resistance, the 43rd resistance, the 45th electric
Resistance, the 19th electric capacity, the 21st electric capacity, the 22nd electric capacity and the 5th amplifier and the 6th amplifier；
The first end of the 42nd resistance is the input of the current sampling circuit, the 42nd resistance
Second end connects first end, the first end of the 19th electric capacity and the 5th amplifier of the 39th resistance
Inverting input, the second end ground connection of the 19th electric capacity, the second end connection the described 5th of the 39th resistance are put
The outfan and the first end of the 43rd resistance of big device, the in-phase input end connection the described 4th of the 5th amplifier
The first end of 15 resistance, the second end ground connection of the 45th resistance, the voltage input end connection of the 5th amplifier
The first end of high level and the 21st electric capacity, the second end ground connection of the 21st electric capacity, the described 43rd is electric
The in-phase input end and the first end of the 22nd electric capacity of the second end connection the 6th amplifier of resistance, the described 20th
The second end ground connection of two electric capacity, the inverting input of the 6th amplifier connects the outfan of the 6th amplifier, described
The outfan of the 6th amplifier is the outfan of the current sampling circuit.
The LED drive power control device also includes voltage sampling circuit, and the input of the voltage sampling circuit connects
Connect the outfan of the input module, the outfan of the voltage sampling circuit connects the of the controller without input, institute
State the output voltage that controller gathers the input module according to the voltage sampling circuit.
The voltage sampling circuit include the 25th resistance, the 26th resistance, the 12nd electric capacity, the first stabilivolt and
Second stabilivolt；
The first end of the 25th resistance connects the first end of the 26th resistance and constitutes the voltage sample electricity
The input on road, the second end ground connection of the 26th resistance, the second end connection the described tenth of the 25th resistance
The negative electrode of the first end of two electric capacity, the negative electrode of first stabilivolt and second stabilivolt, the 12nd electric capacity
The anode common ground connection at the second end, the anode of first stabilivolt and second stabilivolt, the 25th resistance
The second end be the voltage sampling circuit outfan.
The input module includes surge protection module and EMMC filtration modules.
The drive module is at least two, and at least two drive module is connected in parallel, each drive module
One LED of connection.
A kind of LED drive power control device that the present invention is provided, adjusts the brightness of LED when people late at night is few,
Make its brightness dimmed, and under a certain brightness of LED, can pass through to monitor the input signal of rectification module and output letter
Number, the efficiency of whole network system is calculated according to input signal and output signal, to obtain the state of efficiency optimization.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to embodiment or description of the prior art
Needed for accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can be with according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the structural representation of the LED drive power control device that an embodiment of the present invention is provided；
Fig. 2 is the structural representation of the LED drive power control device that another kind embodiment of the invention is provided；
Fig. 3 is the circuit diagram of controller in the LED drive power control device that an embodiment of the present invention is provided；
Fig. 4 is the circuit diagram of current sampling circuit in the LED drive power control device that an embodiment of the present invention is provided；
Fig. 5 is the circuit diagram of voltage sampling circuit in the LED drive power control device that an embodiment of the present invention is provided.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical scheme, illustrate below by specific embodiment.
An embodiment of the present invention provides a kind of LED drive power control device, as shown in figure 1, LED drive power control
Device includes input module 101, controller 103, at least one rectification module, drive module 104 and LED 105；
At least one rectification module is connected in parallel to form rectification module group 102, and the outfan connection of input module 101 is whole
The first input end of the input and controller 103 of flow module group 102, the outfan connection drive module of rectification module group 102
104 input, input module 101 provide ac signal to rectification module group 102, and alternating current is turned by rectification module group 102
Turn to unidirectional current and export to drive module 104, drive optical module to drive LED 105；
The control end of the first outfan connection rectification module group 102 of controller 103, the second input of controller 103
The outfan of connection rectification module group 102, the second outfan of controller 103 connect the control end of drive module 104, controller
103 adjustment drive modules 104 output current to the first preset value to reduce the brightness of LED 105.
Said process is dimmed to LED drive power first, and its main purpose is exactly to dim the brightness of LED 105,
Because brightness that need not be too high when sometimes for example late into the night people is few, in order to energy saving is needed LED 105
Brightness is dimmed, and specifically, is communicated with drive module 104 by controller 103, and 103 drive module 104 of controller is to LED
The electric current of the output of lamp 105 is decreased to a certain preset value to reduce the tool brightness of LED 105, after light modulation terminates, the light of whole electrical network
Can export and determine that, the general power of one or more drive modules 104 of LED 105 just immobilizes.Therefore, control
Now controlled output is minimum to the power of drive module 104 for device 103, you 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 counts
The output of rectification module is calculated to obtain the minima of output, the output for adjusting rectification module group is output
Minima, make rectification module group export the output voltage corresponding to the minima of the output.
Specifically, after each 105 modulated light of paths of LEDs lamp is stable, i.e., when controller 103 adjusts the output of drive module 104
When electric current is to the first preset value, controller 103 is communicated with rectification module, obtains input ac voltage, the electricity of rectification module
Stream and power factor calculate input power, and further obtain the output DC voltage and output DC current letter of rectification module
Breath, calculates output, while controller 103 progressively controls rectification module output electricity according to input power value and output
Pressure, specifically, method that can be using software control is carried out to controller exports the output to rectification module group by controller
Reference voltage, to adjust the output voltage of rectification module group according to predetermined step change, controller is by detecting rectification module
The electric current of group output calculates the output of rectification module one by one until finding the minima of output, and adjusts rectification module
Output be minima, even if rectification module group exports the output voltage corresponding to the minima of the output, now
The peak efficiency of whole electrical network is capable of achieving.
Specifically, controller can include microprocessor (MCU), and the MCU can include CPU (Central
Processing Unit, CPU), read-only memory module (read-only memory, ROM), random storage module (random
Access memory, RAM), time block, digital-to-analogue conversion module (A/D converter), and plural number input/it is defeated
Go out.Certainly, the integrated circuit that controller can also take other form, such as：Application-specific IC (Application
Specific ntegrated Circuit, ASIC) or field programmable gate arrays (Field Programmable Gate
Array, FPGA) etc..
As shown in figure 3, for, in a kind of embodiment of controller, its 14th pin is used for the electricity for gathering output module output
Pressure, its 15th pin are used for the electric current for gathering output module output, and its 11st pin is used to gather rectification module output
Electric current, its 12nd pin are used for the voltage for gathering rectification module output, and its 8th pin is connection rectification module control end
Outfan, is set with the output-current rating to rectification module.
Further, LED drive power control device also include current sampling circuit 107, current sampling circuit 107 it is defeated
Enter the outfan of end connection input module 101, the outfan of current sampling circuit 107 connects the 3rd input of controller 103,
Controller 103 gathers the output current of input module 101 according to current sampling circuit.
Specifically, as shown in figure 4, current sampling circuit 107 include the 39th resistance R39, the 42nd resistance R42,
43rd resistance R43, the 45th resistance R45, the 19th electric capacity C19, the 21st electric capacity C21, the 22nd electric capacity C22
And the 5th amplifier U5A and the 6th amplifier U5B；
Input of the first end of the 42nd resistance R42 for current sampling circuit 107, the of the 42nd resistance R42
Two ends connect the anti-phase of first end, the first end of the 19th electric capacity C19 and the 5th amplifier U5A of the 39th resistance R39
Input, the second end ground connection of the 19th electric capacity C19, second end of the 39th resistance R39 connects the output of the 5th amplifier
End and the first end of the 43rd resistance R43, the in-phase input end of the 5th amplifier U5A connect the of the 45th resistance R45
One end, the second end ground connection of the 45th resistance R45, the voltage input end connection high level and the 20th of the 5th amplifier U5A
The first end of one electric capacity C21, the second end ground connection of the 21st electric capacity C21, the second end connection the 6th of the 43rd resistance R43
The first end of the in-phase input end of amplifier and the 22nd electric capacity C22, the second end ground connection of the 22nd electric capacity C22, the 6th
The inverting input of amplifier U5B connects the outfan of the 6th amplifier, and the outfan of the 6th amplifier U5B is current sample electricity
The outfan on road 107.
The first end of the 42nd resistance R42 connects the outfan of output module 101, is gathered by the 5th amplifier U5A
The output current of output module 101, then export to control after being amplified to the current signal for gathering by the 6th amplifier U5B
Device 103.
Further, LED drive power control device also include voltage sampling circuit 108, voltage sampling circuit 108 it is defeated
Enter the outfan of end connection input module 101, the outfan of voltage sampling circuit 108 connects the 4th input of controller 103,
Controller 103 gathers the output voltage of input module 101 according to voltage sampling circuit.
Voltage sampling circuit 108 include the 25th resistance R25, the 26th resistance R26, the 12nd electric capacity C12, first
Stabilivolt D4 and the second stabilivolt TVS2；
The first end of the 25th resistance R25 connects the first end of the 26th resistance R26 and constitutes voltage sampling circuit
Input, the second end ground connection of the 26th resistance R26, second end of the 25th resistance R25 connects the 12nd electric capacity C12
First end, the negative electrode of the first stabilivolt D4 and the second stabilivolt TVS2 negative electrode, second end of the 12nd electric capacity C12,
The anode common ground connection of the anode of one stabilivolt D4 and the second stabilivolt TVS2, second end of the 25th resistance R25 is electricity
The outfan of pressure sample circuit 108.
The first end of the 25th resistance R25 connects the outfan of output module, by the 26th resistance R26 by electric current
Voltage is converted into, and voltage signal is exported to controller 103.
Further, input module 101 includes surge protection module and EMC filtration modules.
Specifically, AC power supplies is connected with the input of protection module of surging, and provides input voltage letter for protection module of surging
Number, AC power source signal access after respectively through surging protection module and EMC filtration modules carry out harmonic filtration and electromagnetic interference mistake
Filter, it is ensured that power supply signal without noise jamming.
Further, drive module 104 is at least two, and at least two drive modules 104 are connected in parallel, each drive
Dynamic model block 104 connects a LED 105.
A kind of LED drive power control device that the present invention is provided, is adjusting the bright of LED when people late at night is few
Degree so as to which brightness is dimmed, and under a certain brightness of LED, can pass through to monitor input signal and the output of rectification module
Signal, it is defeated by feeding back respective AC to controller according to the efficiency that input signal and output signal calculate whole network system
Enter voltage and current information, DC output voltages and current information, controller calculates whole network system according to these information
Efficiency, while controller control rectification module output DC voltage is slowly varying, finds the state of efficiency optimization.
Above content is with reference to specific preferred implementation further description made for the present invention, it is impossible to assert
The present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention,
Some equivalent substitutes or obvious modification are made on the premise of without departing from present inventive concept, and performance or purposes are identical, all should
It is considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted to.
Claims (7)
1. a kind of LED drive power control device, it is characterised in that the LED drive power control device include input module,
Controller, at least one rectification module, drive module and LED；
At least one rectification module is connected in parallel to form rectification module group, and the outfan connection of the input module is described
The first input end of the input of rectification module group and the controller, the outfan of the rectification module group connect the driving
The input of module, the input module provide ac signal to the rectification module group, and the rectification module group will be described
AC conversion is unidirectional current and exports to the drive module that the drive module drives the LED；
First outfan of the controller connects the control end of the rectification module group, and the second input of the controller connects
The outfan of the rectification module group is connect, the second outfan of the controller connects the control end of the drive module, described
Controller adjusts the drive module and outputs current to the first preset value to reduce the brightness of the LED；
The controller progressively controls the output electricity of rectification module according to the input power and output of the rectification module group
Pressure, and the output of the rectification module is calculated to obtain the minima of the output, adjust the rectification module group
Output be the output minima, make the rectification module group export the output minima institute it is right
The output voltage answered.
2. LED drive power control device as claimed in claim 1, it is characterised in that the LED drive power control device
Also include current sampling circuit, the input of the current sampling circuit connects the outfan of the input module, the electric current
The outfan of sample circuit connects the 4th input of the controller, and the controller is gathered according to the current sampling circuit
The output current of the input module.
3. LED drive power control device as claimed in claim 2, it is characterised in that the current sampling circuit includes
39 resistance, the 42nd resistance, the 43rd resistance, the 45th resistance, the 19th electric capacity, the 21st electric capacity,
22 electric capacity and the 5th amplifier and the 6th amplifier；
The first end of the 42nd resistance is the input of the current sampling circuit, the second of the 42nd resistance
End connects the anti-phase of first end, the first end of the 19th electric capacity and the 5th amplifier of the 39th resistance
Input, the second end ground connection of the 19th electric capacity, the second end of the 39th resistance connects the 5th amplifier
Outfan and the 43rd resistance first end, the 5th amplifier in-phase input end connection the described 45th
The first end of resistance, the second end ground connection of the 45th resistance, the high electricity of voltage input end connection of the 5th amplifier
The first end of gentle 21st electric capacity, the second end ground connection of the 21st electric capacity, the 43rd resistance
Second end connects the first end of the in-phase input end and the 22nd electric capacity of the 6th amplifier, and the described 22nd is electric
The the second end ground connection held, the outfan of inverting input connection the 6th amplifier of the 6th amplifier, the described 6th
The outfan of amplifier is the outfan of the current sampling circuit.
4. LED drive power control device as claimed in claim 1, it is characterised in that the LED drive power control device
Also include voltage sampling circuit, the input of the voltage sampling circuit connects the outfan of the input module, the voltage
The outfan of sample circuit connects the 5th input of the controller, and the controller is gathered according to the voltage sampling circuit
The output voltage of the input module.
5. LED drive power control device as claimed in claim 4, it is characterised in that the voltage sampling circuit includes
25 resistance, the 26th resistance, the 12nd electric capacity, the first stabilivolt and the second stabilivolt；
The first end of the 25th resistance connects the first end of the 26th resistance and constitutes the voltage sampling circuit
Input, the second end ground connection of the 26th resistance, the second end connection of the 25th resistance are described 12nd electric
The negative electrode of the first end of appearance, the negative electrode of first stabilivolt and second stabilivolt, the second of the 12nd electric capacity
End, the anode common ground connection of the anode of first stabilivolt and second stabilivolt, the of the 25th resistance
Two ends are the outfan of the voltage sampling circuit.
6. LED drive power control device as claimed in claim 1, it is characterised in that the input module includes that surge is protected
Shield module and EMC filtration modules.
7. LED drive power control device as claimed in claim 1, it is characterised in that the drive module is at least two,
At least two drive module is connected in parallel, and each drive 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104302060A CN104302060A (en) | 2015-01-21 |
| CN104302060B true CN104302060B (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Families Citing this family (2)
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202488799U (en) * | 2011-10-14 | 2012-10-10 | 欧司朗股份有限公司 | Illumination system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201240257A (en) * | 2011-03-17 | 2012-10-01 | Green Solution Tech Co Ltd | Transistor circuit with protecting function |
| CN103354685B (en) * | 2013-07-22 | 2015-03-11 | 广州晶锐信息技术有限公司 | LED driving chip |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202488799U (en) * | 2011-10-14 | 2012-10-10 | 欧司朗股份有限公司 | Illumination system |
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| CN104302060A (en) | 2015-01-21 |
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Granted publication date: 20170329 Termination date: 20191024 |