CN109068446A - A kind of linear constant current circuit and its control method with high conversion efficiency - Google Patents
A kind of linear constant current circuit and its control method with high conversion efficiency Download PDFInfo
- Publication number
- CN109068446A CN109068446A CN201810997360.1A CN201810997360A CN109068446A CN 109068446 A CN109068446 A CN 109068446A CN 201810997360 A CN201810997360 A CN 201810997360A CN 109068446 A CN109068446 A CN 109068446A
- Authority
- CN
- China
- Prior art keywords
- module
- control module
- voltage
- main control
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 42
- 238000004891 communication Methods 0.000 claims description 22
- 238000012986 modification Methods 0.000 claims description 15
- 230000004048 modification Effects 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention belongs to the technical fields of constant-current circuit, more particularly to a kind of linear constant current circuit with high conversion efficiency, including main control module, DC voltage control module, voltage feedback module and constant flow module, the main control module is electrically connected with the DC voltage control module, the voltage feedback module and the constant flow module, the DC voltage control module, the voltage feedback module and the constant flow module are electrically connected with load respectively, the main control module, the DC voltage control module, the constant flow module and load concatenation forming circuit.The present invention is by driving tube both ends minimum in holding circuit, and constant high conversion efficiency, realizing reduces calorific value and oneself power consumption, facilitates the volume for reducing circuit, expands the range of output voltage, and improve current conversion efficiency.In addition, the invention also discloses a kind of control methods of linear constant current circuit with high conversion efficiency.
Description
Technical field
The invention belongs to the technical fields of constant-current circuit, and in particular to a kind of linear constant current circuit with high conversion efficiency
And its control method.
Background technique
Nowadays, in the failure of removal that illuminator occurs, most failure is circuit design problem, so circuit is set
The selection of meter scheme also have it is very important, it is reliable, low cost this requires selecting suitable circuit in product design
Circuit is the premise for producing illuminator.Can be obtained according to the optical characteristics of LED, if forward current increases, the brightness of LED also with
Increase, in order to keep the constant stabilization it is necessary to guarantee LED forward current of LED light emission luminance.Therefore it designs reasonable linear permanent
It is particularly significant just to seem for LED illumination lamp for current circuit.
Wherein, Chinese patent literature discloses a kind of LED linear constant current power supply (publication number: 202679742 U of CN), packet
Include: EMC circuit, rectification circuit, constant-current control circuit and load, alternating current input power supplying are sent into rectification after EMC circuit filtering
Circuit, the electric current after rectified circuit is rectified are sent into constant-current control circuit, and the output electric current access of constant-current control circuit is negative
It carries, the constant-current control circuit includes the identical local constant-current circuit of multiplex circuit structure, and the local constant-current circuit is
Corresponding independent one group of load is powered.Above-mentioned scheme can locally carry out current constant control to a certain extent, but this
At least there is also following defects for kind scheme: first, structure is complicated and not easy to disassemble and installation, second, needs when exporting high current
Increased cooling fin is wanted, thus will increase the volume of product, third, output voltage range very little is not able to satisfy various specified
The load of voltage.
Summary of the invention
It is an object of the present invention to: in view of the deficiencies of the prior art, provide a kind of with the linear of high conversion efficiency
Constant-current circuit, by keeping the driving tube both ends minimum of DC voltage control module, constant high conversion efficiency is realized
Calorific value and oneself power consumption are reduced, facilitates the volume for reducing circuit, expands the range of output voltage, to improve electric current conversion
Efficiency.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of linear constant current circuit with high conversion efficiency, including main control module, DC voltage control module, Voltage Feedback mould
Block and constant flow module, the main control module and the DC voltage control module, the voltage feedback module and the constant current mould
Block electrical connection, the DC voltage control module, the voltage feedback module and the constant flow module are electrically connected with load respectively,
The main control module, the DC voltage control module, the constant flow module and load concatenation forming circuit.Increase electricity
Feedback module is pressed, slowly varying voltage deviation is continuously monitored and counted, and feeds back to main control module, has prison
The functions such as survey, analysis, memory, inquiry, parameter setting；DC voltage control module changes output voltage slowly, until constant current
The electric current of module feedback is identical as preset value just to be stopped；Constant flow module is fed back for exporting current value corresponding with setting value
To main control module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency of the present invention, the voltage is anti-
Feedback module includes output voltage detection module and load voltage detection module, the output voltage detection module and the master control mould
Block, the DC voltage control module and load electrical connection, the both ends of the load voltage detection module and the load
And the main control module electrical connection.Output voltage detection module and load voltage detection module are all anti-by the voltage of monitoring and statistics
It feeds main control module, output voltage detection module is used to monitor the output voltage of DC voltage control module, load voltage monitoring
Module is used to monitor the voltage at load both ends.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency of the present invention, the constant current mould
Block includes the adjustable linear constant-current driven module being sequentially connected in series and load current detection module, and the adjustable linear constant current drives mould
Block is electrically connected with the main control module and the load, and the load current detection module is electrically connected with the main control module.It will
Constant flow module is split as adjustable linear constant-current driven module and load current detection module, and one of module damage is avoided to cause
Whole device failure reduces maintenance cost, and adjustable linear constant-current driven module is according to the preset value in main control module, automatic adjustment
Corresponding current value, load current detection module are used to monitor the current value of circuit, and feed back to main control module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency of the present invention, the linear perseverance
Current circuit further includes A/D switch power module and communication module, the output end and the direct current of the A/D switch power module
Control module electrical connection is pressed, the output end of the communication module is electrically connected with the main control module.A/D switch power module makes to hand over
Galvanic electricity filters to obtain a high direct voltage by high-voltage rectifying, while being supplied to DC control module；User can pass through communication
Setting value is modified at a distance main control module or increased to module, is facilitated the operation for remotely monitoring circuit, is improved circuit
Reliability.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency of the present invention, the master control mould
Block is one of single-chip microcontroller and programmable logic controller (PLC), and the modification scope of the DC voltage control module is 5V ~ 48V.
Single-chip microcontroller and programmable logic controller (PLC) possess stronger extended capability, and programming step is relatively simple, help to reduce electricity
The production cost on road limits the modification scope of DC voltage control module, prevents modification scope narrow, main control module is caused to regulate and control
The range of the voltage value of load also constriction, while avoiding modification scope wide, increase the cost of DC voltage control module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency of the present invention, the adjustable line
Property constant-current driven module modification scope be 10mA ~ 20A.The modification scope for limiting adjustable linear constant-current driven module, prevents from adjusting
Narrow limits are controlled, causes the load type of adaptation few, reduces the expansion capability of circuit, while preventing modification scope wide, cause
The cost increase of adjustable linear constant-current driven module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency of the present invention, the A/D is opened
The output area of powered-down source module is DC10V ~ DC60V, and the communication module is in radio communication circuit and wire communication circuit
One kind.The output area for limiting A/D switch power module, prevents output area from crossing width, can not be with DC voltage control mould
Block matches, while preventing output area wide, causes part output area that can not efficiently use.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency of the present invention, the direct current
Pressure control module and the adjustable linear constant-current driven module are provided with DAC chip.DAC chip issues main control module
Digital signal is converted into analog signal, helps to realize main control module and drives to DC voltage control module and adjustable linear constant current
The control of module.
As a kind of a kind of improvement of the linear constant current circuit with high conversion efficiency of the present invention, the master control mould
Block, the DC voltage control module and the adjustable linear constant-current driven module have the function of in-service units.Due to master control
Module, DC voltage control module and adjustable linear constant-current driven module all have the function of application programming, reduce each portion of circuit
That divides interdepends, and the independence of each module is improved, to improve the maintainability and scalability of circuit.
The second object of the present invention is to additionally provide a kind of controlling party of linear constant current circuit with high conversion efficiency
Method includes the following steps:
1) setting value is input in main control module by user；
2) main control module exports corresponding current value according to set value calculation constant flow module, then after access load, master control mould
The output voltage of block control DC voltage control module slowly changes；
3) when the electric current of constant flow module detection is equal with setting value, main control module calculates this according to the feedback of voltage feedback module
When DC voltage control module the smallest operating voltage in driving tube both ends；
4) main control module keeps minimum constant by control DC voltage control module, thus constant transfer efficiency.
In control method of the invention, it is inversely proportional due to the power consumption of driving tube with transfer efficiency in step 3), at this time circuit
Transfer efficiency highest, circuit heat reduces therewith, as long as keeping minimum constant, so that it may constant transfer efficiency.
Detailed description of the invention
Fig. 1 is flowage structure schematic diagram of the invention；
Wherein: 1- main control module；2- DC voltage control module；3- voltage feedback module；31- output voltage detection module；32-
Load voltage detection module；4- constant flow module；41- is adjustable linear constant-current driven module；42- load current detection module；5- is negative
It carries；6-A/D switch power module；7- communication module.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within an acceptable error range, those skilled in the art can solve technology within a certain error range
Problem basically reaches technical effect.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", level "
The orientation or positional relationship of equal instructions is to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of the description present invention and
Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction
And operation, therefore be not considered as limiting the invention.
In invention unless specifically defined or limited otherwise, the arts such as term " installation ", " connected ", " connection ", " fixation "
Language shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
Below in conjunction with attached drawing, invention is further described in detail, but not as a limitation of the invention.
Embodiment 1
As shown in Figure 1, a kind of linear constant current circuit with high conversion efficiency, including main control module 1, DC voltage control module
2, voltage feedback module 3 and constant flow module 4, main control module 1 and DC voltage control module 2, voltage feedback module 3 and constant current mould
Block 4 is electrically connected, and DC voltage control module 2, voltage feedback module 3 and constant flow module 4 are electrically connected with load 5 respectively, master control mould
Block 1,5 concatenation forming circuit of DC voltage control module 2, constant flow module 4 and load.Increase voltage feedback module 3, to slow
The voltage deviation of variation is continuously monitored and is counted, and feeds back to main control module 1, have monitoring, analysis, memory, inquiry,
The functions such as parameter setting；DC voltage control module 2 changes output voltage slowly, until constant flow module 4 feed back electric current with
Preset value is identical just to be stopped；Constant flow module 4 feeds back to main control module for exporting current value corresponding with setting value.
Preferably, voltage feedback module 3 includes output voltage detection module 31 and load voltage detection module 32, output electricity
Pressure detection module 31 and main control module 1, DC voltage control module 2 and load 5 be electrically connecteds, load voltage detection module 32 with bear
The both ends and main control module 1 for carrying 5 are electrically connected.Output voltage detection module 31 and load voltage detection module 32 all will monitoring and systems
For the Voltage Feedback of meter to main control module 1, output voltage detection module 31 is used to monitor the output electricity of DC voltage control module 2
Pressure, load voltage monitoring modular 32 are used to monitor the voltage at 5 both ends of load.
Preferably, constant flow module 4 includes the adjustable linear constant-current driven module 41 and load current detection mould being sequentially connected in series
Block 42, adjustable linear constant-current driven module 41 are electrically connected with main control module 1 and load 5, load current detection module 42 and master control
Module 1 is electrically connected.Constant flow module 4 is split as adjustable linear constant-current driven module 41 and load current detection module 42, is avoided
One of module damage causes whole device to fail, and reduces maintenance cost, and adjustable linear constant-current driven module 41 is according to master control
Preset value in module 1 automatically adjusts corresponding current value, and load current detection module 42 is used to monitor the current value of circuit,
And feed back to main control module 1.
Preferably, linear constant current circuit further includes A/D switch power module 6 and communication module 7, A/D switch power module 6
Output end be electrically connected with DC voltage control module 2, the output end of communication module 7 is electrically connected with main control module 1, main control module
1 is programmable logic controller (PLC), and communication module 7 is radio communication circuit.A/D switch power module 6 makes alternating current pass through high pressure
Rectifying and wave-filtering obtains a high direct voltage, while being supplied to DC control module 2；User can be by communication module 7 to master control
Setting value is modified at a distance or increased to module 1, is facilitated the operation for remotely monitoring circuit, is improved the reliability of circuit；It can
Programmed logic controller possesses stronger extended capability, and programming step is relatively simple, facilitates the production cost for reducing circuit.
Preferably, DC voltage control module 2 and adjustable linear constant-current driven module 41 are provided with DAC chip, master control
Module 1, DC voltage control module 2 and adjustable linear constant-current driven module 41 have the function of in-service units.DAC chip, will
The digital signal that main control module 1 issues is converted into analog signal, helps to realize main control module 1 to DC voltage control module 2
With the control of adjustable linear constant-current driven module 41, due to main control module 1, DC voltage control module 2 and adjustable linear constant current
Drive module 41 all has the function of application programming, reduces interdepending for circuit portions, improves the independence of each module, from
And improve the maintainability and scalability of circuit.
Embodiment 2
Unlike the first embodiment: the main control module 1 of the present embodiment is single-chip microcontroller, the modification scope of DC voltage control module 2
For 5V ~ 48V, the modification scope of adjustable linear constant-current driven module 41 is 10mA ~ 20A, the output model of A/D switch power module 6
It encloses for DC10V ~ DC60V, communication module 7 is wire communication circuit.The modification scope of adjustable linear constant-current driven module 41 is limited,
It prevents modification scope narrow, causes 5 type of load of adaptation few, reduce the expansion capability of circuit, while preventing modification scope mistake
Width leads to the cost increase of adjustable linear constant-current driven module 41, limits the output area of A/D switch power module 6, prevents defeated
Range crosses width out, can not match, while preventing output area wide with DC voltage control module 2, part is caused to export
Range can not efficiently use, and comparator is for being compared two voltages, and with their difference of determination, as direct current is voltage-controlled
The minimum at the driving tube both ends of molding block 2, and main control module 1 is fed back to, main control module 1 passes through the minimum work of control
Voltage keeps transfer efficiency constant.
Should be noted single-chip microcontroller model STM32F107, this single-chip microcontroller contains Cortex-M3 kernel, and 16
A 12 ADC interfaces, 2 12 DAC interfaces, 1 10M/100M adaptive network interface, 1 USB interface, 2 CAN interfaces,
5 serial ports, 10 timers；Communication module 7 is serial communication circuit；Load 5 is vision light source；Output voltage detection module 31
It is connect with load voltage detection module 32 with the ADC interface of single-chip microcontroller.
Embodiment 3
As shown in Figure 1, a kind of control method of any linear constant current circuit with high conversion efficiency of embodiment 1 ~ 2, packet
Include following steps:
1) setting value is input in main control module 1 by user by communication module 7；
2) main control module 1 exports corresponding current value according to the adjustable linear constant-current driven module 41 of set value calculation, is then connecing
After entering load 5, the output voltage that main control module 1 controls DC voltage control module 2 slowly changes；
3) when the electric current of the detection of load current detection module 42 is equal with setting value, main control module 1 records output voltage at this time
The difference of the real-time voltage of detection module 31 and load voltage detection module 32, the as driving tube of DC voltage control module 2
The smallest operating voltage in both ends, since power consumption and the transfer efficiency of driving tube are inversely proportional, the transfer efficiency highest of circuit, electric at this time
Road heat is reduced therewith；
4) last main control module 1 keeps minimum constant by control DC voltage control module 2, thus constant conversion
Efficiency.
It should be noted that: in control method of the invention, detected in step 3) when load current detection module 42
Electric current is equal with setting value, by the difference of output voltage detection module 31 and the real-time voltage of load voltage detection module 32,
Obtain the smallest operating voltage in driving tube both ends of DC voltage control module 2, due to driving tube power consumption and transfer efficiency at
Inverse ratio, the transfer efficiency highest of circuit, circuit heat are reduced therewith at this time, as long as keeping minimum constant, so that it may permanent
Determine transfer efficiency.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to above-mentioned specific embodiment, all those skilled in the art exist
Made any conspicuous improvement, replacement or modification all belong to the scope of protection of the present invention on the basis of the present invention.This
Outside, although using some specific terms in this specification, these terms are merely for convenience of description, not to the present invention
Constitute any restrictions.
Claims (10)
1. a kind of linear constant current circuit with high conversion efficiency, it is characterised in that: voltage-controlled including main control module (1), direct current
Molding block (2), voltage feedback module (3) and constant flow module (4), the main control module (1) and the DC voltage control module
(2), the voltage feedback module (3) and the constant flow module (4) electrical connection, the DC voltage control module (2), the electricity
Pressure feedback module (3) and the constant flow module (4) are electrically connected with load (5) respectively, the main control module (1), the direct current
Press control module (2), the constant flow module (4) and the load (5) concatenation forming circuit.
2. a kind of linear constant current circuit with high conversion efficiency as described in claim 1, it is characterised in that: the voltage is anti-
Presenting module (3) includes output voltage detection module (31) and load voltage detection module (32), the output voltage detection module
(31) it is electrically connected with the main control module (1), the DC voltage control module (2) and the load (5), the load voltage
Detection module (32) is electrically connected with the both ends of the load (5) and the main control module (1).
3. a kind of linear constant current circuit with high conversion efficiency as described in claim 1, it is characterised in that: the constant current mould
Block (4) includes the adjustable linear constant-current driven module (41) being sequentially connected in series and load current detection module (42), the adjustable line
Property constant-current driven module (41) is electrically connected with the main control module (1) and the load (5), the load current detection module
(42) it is electrically connected with the main control module (1).
4. a kind of linear constant current circuit with high conversion efficiency as described in claim 1, it is characterised in that: the linear perseverance
Current circuit further includes A/D switch power module (6) and communication module (7), the output end of the A/D switch power module (6) with
DC voltage control module (2) electrical connection, the output end of the communication module (7) are electrically connected with the main control module (1).
5. a kind of linear constant current circuit with high conversion efficiency as described in claim 1, it is characterised in that: the master control mould
Block (1) is one of single-chip microcontroller and programmable logic controller (PLC), and the modification scope of the DC voltage control module (2) is 5V
~48V。
6. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 3, it is characterised in that: the adjustable line
Property constant-current driven module (41) modification scope be 10mA ~ 20A.
7. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 4, it is characterised in that: the A/D is opened
The output area of powered-down source module (6) is DC10V ~ DC60V, and the communication module (7) is radio communication circuit and wire communication
One of circuit.
8. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 3, it is characterised in that: the direct current
Pressure control module (2) and the adjustable linear constant-current driven module (41) are provided with DAC chip.
9. a kind of linear constant current circuit with high conversion efficiency as claimed in claim 3, it is characterised in that: the master control mould
Block (1), the DC voltage control module (2) and the adjustable linear constant-current driven module (41) have in-service units function
Energy.
10. a kind of control method of the described in any item linear constant current circuits with high conversion efficiency of claim 1-9, special
Sign is, includes the following steps:
Setting value is input in main control module (1) by user；
Main control module (1) exports corresponding current value according to set value calculation constant flow module (4), then after access loads (5),
The output voltage of main control module (1) control DC voltage control module (2) slowly changes；
When the electric current of constant flow module (4) detection is equal with setting value, main control module (1) according to the feedbacks of voltage feedback module (3),
Calculate the smallest operating voltage in driving tube both ends of DC voltage control module (2) at this time；
Main control module (1) keeps minimum constant by control DC voltage control module (2), so that constant conversion is imitated
Rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997360.1A CN109068446B (en) | 2018-08-29 | 2018-08-29 | Linear constant current circuit with high conversion efficiency and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997360.1A CN109068446B (en) | 2018-08-29 | 2018-08-29 | Linear constant current circuit with high conversion efficiency and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109068446A true CN109068446A (en) | 2018-12-21 |
| CN109068446B CN109068446B (en) | 2024-03-29 |
Family
ID=64757872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810997360.1A Active CN109068446B (en) | 2018-08-29 | 2018-08-29 | Linear constant current circuit with high conversion efficiency and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109068446B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001309557A (en) * | 2000-04-25 | 2001-11-02 | Nec Miyagi Ltd | Series-connection type constant current feed apparatus |
| JP2013182377A (en) * | 2012-03-01 | 2013-09-12 | Ofuna Kigyo Nihon Kk | Constant current power supply device |
| CN105792481A (en) * | 2016-04-19 | 2016-07-20 | 东莞市奥普特自动化科技有限公司 | Constant current controller capable of automatically detecting maximal working current of light source and detection method thereof |
| CN108646839A (en) * | 2018-07-06 | 2018-10-12 | 广东奥普特科技股份有限公司 | A kind of constant-current circuit fast-response control device |
| CN209299559U (en) * | 2018-08-29 | 2019-08-23 | 广东奥普特科技股份有限公司 | A kind of linear constant current circuit with high conversion efficiency |
-
2018
- 2018-08-29 CN CN201810997360.1A patent/CN109068446B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001309557A (en) * | 2000-04-25 | 2001-11-02 | Nec Miyagi Ltd | Series-connection type constant current feed apparatus |
| JP2013182377A (en) * | 2012-03-01 | 2013-09-12 | Ofuna Kigyo Nihon Kk | Constant current power supply device |
| CN105792481A (en) * | 2016-04-19 | 2016-07-20 | 东莞市奥普特自动化科技有限公司 | Constant current controller capable of automatically detecting maximal working current of light source and detection method thereof |
| CN108646839A (en) * | 2018-07-06 | 2018-10-12 | 广东奥普特科技股份有限公司 | A kind of constant-current circuit fast-response control device |
| CN209299559U (en) * | 2018-08-29 | 2019-08-23 | 广东奥普特科技股份有限公司 | A kind of linear constant current circuit with high conversion efficiency |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109068446B (en) | 2024-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103582240B (en) | Control the light adjusting controller of LED light source, drive circuit and light-dimming method | |
| CN101754530B (en) | Driving circuit with dimming controller for driving light sources, method and system therefor | |
| CN102685975B (en) | Controllers, systems and methods for controlling dimming of light sources | |
| CN103547014B (en) | It is associated with load drive device and the method thereof of light-emitting diode lamp tube | |
| CN203951654U (en) | A kind of LED adjusting control circuit | |
| CN103874271B (en) | Power supply changeover device, relevant control circuit and method | |
| CN104703358B (en) | Wide-voltage-range LED (light emitting diode) lamp switching and dimming driving circuit and LED lamp dimming control system | |
| CN106604479A (en) | Non-isolated LED dimming circuit with PWM and DIM dimming | |
| CN201860492U (en) | Light modulating device for LED illumination lamp | |
| CN203352858U (en) | LED all-turning-on control circuit and constant voltage driven LED illumination system | |
| CN209299559U (en) | A kind of linear constant current circuit with high conversion efficiency | |
| CN201489799U (en) | LED display screen and power supply circuit thereof | |
| CN207305003U (en) | Lighting system | |
| CN113038652A (en) | Circuit control system, serial control device and control method thereof | |
| CN110049592A (en) | LED lamp and its intelligent control method | |
| CN107635305A (en) | A kind of LED drive circuit | |
| WO2023185426A1 (en) | Led driving circuit | |
| CN109068446A (en) | A kind of linear constant current circuit and its control method with high conversion efficiency | |
| CN102958240B (en) | Light source device and dimming control circuit thereof | |
| CN110099486A (en) | A kind of adjusting control circuit and dimming controlling method | |
| CN103702484A (en) | Centralized-control type LED (Light Emitting Diode) headlamp set dimming system | |
| CN103872933B (en) | Power supply changeover device, relevant control circuit and method | |
| CN205213122U (en) | But LED lamp area luminance regulation control circuit | |
| CN207969014U (en) | A kind of LED PAR lamps driving circuit and LED PAR lamps | |
| CN208739455U (en) | LED touch dimmer temperature driving power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |