CN110351925A - With efficient various colors LED light Shared Drive - Google Patents
With efficient various colors LED light Shared Drive Download PDFInfo
- Publication number
- CN110351925A CN110351925A CN201910579467.9A CN201910579467A CN110351925A CN 110351925 A CN110351925 A CN 110351925A CN 201910579467 A CN201910579467 A CN 201910579467A CN 110351925 A CN110351925 A CN 110351925A
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- converter
- led light
- voltage
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- transistor
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- 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]
Abstract
The invention discloses one kind to have efficient various colors LED light Shared Drive, it is mainly provided with filter rectifier, DC-DC converter, AC/DC converter, full-wave rectifying circuit and LED light string, filter rectifier connection input power is filtered and rectifies；The voltage of rectification is converted into fixed DC voltage by the DC-DC converter；DC voltage is converted into array high frequency square wave alternating voltage by the AC/DC converter；AC rectification at stable DC voltage, is driven LED light string to provide electric current by the full-wave rectifying circuit；In this way, the stable DC voltage of the DC-DC converter reaches the control of each LED light string constant voltage, then LED modules with different colors lamp string is reached by the multiwinding transformer of the AC/DC converter and is respectively driven by respective full-wave rectifying circuit.
Description
Technical field
The present invention has efficient various colors LED light Shared Drive about one kind, especially by filter rectification
Circuit, DC-DC converter, AC/DC converter, full-wave rectifying circuit and LED light string are formed, filter rectification electricity
It is filtered and rectifies after road connection input power；Voltage after rectification is converted into the straight of fixation by the DC-DC converter
Galvanic electricity pressure；DC voltage is converted into the high frequency square wave alternating voltage of array different voltages by the AC/DC converter；The all-wave
AC rectification at stable direct-current working volts, is driven LED light string to provide electric current by rectification circuit；In this way, by
Each LED light string constant voltage control is reached by the stable DC voltage of the DC-DC converter, then is turned by the DC/AC
The multiwinding transformer of parallel operation reaches the respective full-wave rectifying circuit driving of each freedom of LED light string of different colours, can be realized
High efficiency, low cost, structure be simple and collocation brightness adjustment control.
Background technique
High-brightness LED lamp is by the light source widely as various indoor and outdoor lighting equipment at present, such as: showing sales field, hundred
Goods company, street lamp, advertising signboard, agricultural illumination of high economic value etc., can be used LED light to provide high quality and diversification
Lighting source, and the luminous intensity of the LED light, efficiency, service life and color rendering are preferred compared with halogen lamp, and driving circuit also compares
General gas flow discharge lamp more structure simply with it is cheap, but belong to the fixed electricity of tradition in view of the design of LED lamp driver
Flow control mode only can be suitably used for simple monochromatic LED lamp driving circuit, when there is more lamp circuits that need to control respectively, and need to divide
Do not dim, or when being the LED light source of different colours, because each LED light property difference make the complexity of driving circuit at
This increase causes expensive driver, efficiency reduction, volume increase, stability decline；Therefore current LED lamp driver is adopted
Constant current control mode provides LED light stable DC stream by the high frequency switching of constant-current circuit, generally with number
LED lamp string shares the mode of a control loop to complete, and because the characteristic of LED light is, the LED light of different colours, work
It is different from as electric current, and same control circuit can not be shared to drive, another control loop is needed to complete, and basic
Control loop is usually all using buck converter or the circuit framework of direction flyback converter, and composition component substantially is in addition to switching group
Outside part, magnet assembly, collocation control circuit is also needed to complete；Therefore, additional control loop brings additional part and cost
Increase, additional magnet assembly more cause LED light string driver volume and weight increase, multiple groups especially in different colors
The influence of LED light string driver is more very；Also, the decompression converting circuit or flyback of the LED light string driver of traditional constant current turn
The inductor design of magnet assembly is operated in discontinuous current mode to reduce the loss of switch block, due to LED by parallel operation
Difference on modulation characteristic, to maintain in discontinuous current mode to choose the inductor operation of conversion circuit in design
The design of larger ampleness, to adapt to the variation of various LED light characteristics, circuit loss higher so as to cause inductor peak current
Also and then increase, cause the mode efficiency of the constant current control lower, not only increase circuit loss, cause driver temperature liter
Height can also shorten its service life, it is very huge influence product, and when to drive jointly there are many different characteristics or color LED light,
Its adverse effect is even more huge, however, general LED lamp driver still with after rectifying and wave-filtering the various isolation of DC voltage collocation with
Non-isolated converter drives LED light with the control mode of constant current, as shown in Figure 1, for existing LED lamp driver electricity
Lu Tu is mainly made of filter rectifier 10, buck converter 11 and LED light string 12, wherein the filter rectifier 10
It is connected with input power (alternating current), there is input supply voltage Vi and input power electric current Ii, the filter rectifier 10 is by filtering
Wave inductance Lm, filter capacitor Cm and full-wave rectifier Dr connect composition, which can carry out the filter of alternating current
Wave and rectification, and electromagnetic interference is prevented, which is connected to after the filter rectifier 10, filter rectification electricity
Capacitor Cdc and resistance Rs is connected between road 10 and the buck converter 11, the buck converter 11 is by diode Db, transistor
Qb, inductance Lb and capacitor Cb connect composition, and the transistor Qb of the buck converter 11 is connected with drive integrated circult 110, should
LED light string 12 is connected to 11 both ends capacitor Cb of buck converter, which is connected by several LED light forms；Such as
This, which is not provided with DC-DC converter, and can not make the LED light string with stable DC voltage
12 there is constant voltage to control, and more be not provided with AC/DC converter, and can not make multiple and different colors with multiwinding transformer
The respective full-wave rectifying circuit driving of each freedom of LED light string 12, therefore, low efficiency, the control loop that at high cost and need are additional cause
Structure is complicated.
Summary of the invention
Reach each by the stable DC voltage of the DC-DC converter the main purpose of the present invention is to provide a kind of
LED light string constant voltage controls, then reaches the LED of multiple and different colors by the multiwinding transformer of the AC/DC converter
The respective full-wave rectifying circuit driving of each freedom of lamp string, with high efficiency, low cost, structure is simple and arranges in pairs or groups brightness adjustment control person's
With efficient various colors LED light string Shared Drive.
It is provided by the invention have efficient various colors LED light Shared Drive include: DC-DC converter,
It is connected to the filter rectifier, which is connected by the first inductance, first diode and the first transistor
Voltage after rectification is converted into fixed DC voltage by composition, the DC-DC converter；AC/DC converter, connection
In the DC-DC converter, the AC/DC converter is by first capacitor, the second capacitor, second transistor, third crystal
Pipe and multiwinding transformer connect composition, which is converted into DC voltage the height of array different voltages
Frequency ac square-wave voltage；Multiple full-wave rectifying circuits are connected to the AC/DC converter, and the full-wave rectifying circuit is by second
Diode, third diode and third capacitor connect composition, and the full-wave rectifying circuit is by AC rectification at stable direct current
Operating voltage, with the LED light string for providing electric current to be driven multiple and different colors, the LED light string and the full-wave rectifying circuit
It corresponds to the multiwinding transformer and there is multiple groups connection setting, which connects bunchiness by plurality of LEDs lamp.
The present invention has efficient various colors LED light Shared Drive, wherein the of the DC-DC converter
One transistor is connected with drive integrated circult, which is controlled by the drive integrated circult, the integrated electricity of the driving
Road has the function of constant voltage output and high power factor, and its DC voltage does not change because mains input voltage changes, again
First inductance of the DC-DC converter is operable in continuum boundary current-mode, reaches zero current switching conducting, to reduce
Switch cost, and then improve efficiency.
The present invention has efficient various colors LED light Shared Drive, wherein the of the AC/DC converter
Two-transistor and third transistor are connected with drive integrated circult, which is controlled by the drive integrated circult,
What the drive integrated circult had the function of fixed frequency and on-state rate replaces switching.
The present invention has efficient various colors LED light Shared Drive, wherein the output power of each LED light string can
It is designed by the number of turns of the multiwinding transformer, it is defeated come the load that reaches each own fixation of different characteristics or color LED light string
Power out, each LED light are serially connected with adjusting control circuit and microcontroller, to carry out brightness adjustment control, more can isolated fault LED
Lamp string circuit, and the unlikely other normal LED light strings of influence.
The present invention has efficient various colors LED light Shared Drive, and major advantage exists: by the direct current/straight
The stable DC voltage output characteristics of stream transformer reach each LED light string constant voltage control, and not because mains input voltage changes
And change, then each by each freedom of LED light string that the multiwinding transformer of the AC/DC converter reaches multiple and different colors
From full-wave rectifying circuit driving, not only reduce volume, reduce loss, with more high efficiency, low cost, structure be simple and collocation
Brightness adjustment control person, and can be energy saving, prolong the service life.
Detailed description of the invention
Fig. 1 show the circuit diagram of existing LED lamp driver.
Fig. 2 show the block diagram of the embodiment of the present invention.
Fig. 3 show the circuit diagram of the embodiment of the present invention.
Description of symbols: 10- filter rectifier；11- buck converter；110- drive integrated circult；12-LED lamp
String；2- filter rectifier；3- DC-DC converter；30,40- drive integrated circult；4- AC/DC converter；5- is complete
Wave rectification circuit；6-LED lamp string；7- adjusting control circuit；8- microcontroller；Vi- input supply voltage；Ii- input power electricity
Stream；LmFilter inductance；CmFilter capacitor；DrFull-wave rectifier；CdcCapacitor；RsResistance；DbDiode；Qb-Transistor；Lb-
Inductance；CbCapacitor；L1- the first inductance；D1First diode；Q1The first transistor；C1First capacitor；C2- the second capacitor；
Q2Second transistor；Q3Third transistor；T- multiwinding transformer；D2- the second diode；D3Third diode；C3Third
Capacitor.
Specific embodiment
In relation to the present invention for up to above-mentioned use purpose and effect, used technological means is hereby enumerated preferably feasible
Embodiment, and cooperate shown in schema, details are as follows:
The embodiment of the present invention please refers to shown in Fig. 2, Fig. 3, mainly by filter rectifier 2, DC-DC converter
3, the LED light string 6 of AC/DC converter 4, multiple full-wave rectifying circuits 5 and multiple and different colors is formed, wherein the filter
Wave rectification circuit 2 is connected with input power (alternating current), has input supply voltage Vi and input power electric current Ii, the filter rectification
Circuit 2 is by filter inductance Lm, filter capacitor CmAnd full-wave rectifier DrComposition is connected, which can be exchanged
The filtering and rectification of electricity, and prevent electromagnetic interference；The DC-DC converter 3 is connected to the filter rectifier 2, and the direct current/
Direct current transducer 3 is by the first inductance L1, first diode D1And the first transistor Q1Composition is connected, the DC-DC converter
3 are converted into the voltage after rectification fixed DC voltage, other than it can maintain constant DC voltage, while having both function because repairing
Orthofunction, the first transistor Q of the DC-DC converter 31It is connected with drive integrated circult 30, the DC-DC converter
3 are controlled by the drive integrated circult 30, which has the function of constant voltage output and high power factor, and should
First inductance L of DC-DC converter 31It is operable in continuum boundary current-mode, reaches zero current switching conducting, to subtract
Few switch cost, and then improve efficiency and its DC voltage does not change because mains input voltage changes；DC/AC conversion
Device 4 is connected to the DC-DC converter 3, and the AC/DC converter 4 is by first capacitor C1, the second capacitor C2, the second crystal
Pipe Q2, third transistor Q3And multiwinding transformer T connects composition, which is converted into DC voltage
The high frequency square wave alternating voltage of array different voltages, the second transistor Q of the AC/DC converter 42And third transistor Q3
It is connected with drive integrated circult 40, which is controlled by the drive integrated circult 40, the drive integrated circult
40 have the function of fixed frequency and on-state rate replace switching；It shouldIt is multipleFull-wave rectifying circuit 5 is connected to the DC/AC and turns
Parallel operation 4, the full-wave rectifying circuit 5 is by the second diode D2, third diode D3And third capacitor C3Composition is connected, the all-wave
AC rectification at stable direct-current working volts, is driven multiple and different colors to provide electric current by rectification circuit 5
LED light string 6, the LED light string 6 multiwinding transformer T corresponding with the full-wave rectifying circuit 5 and have multiple groups connection setting, should
LED light string 6 is connected with adjusting control circuit 7 and microcontroller 8, and to carry out brightness adjustment control, which is also connected to
The full-wave rectifying circuit 5, the LED light string 6 connect bunchiness by plurality of LEDs lamp, and each LED light string 6 has different characteristics or color LED
Lamp circuit.
The embodiment of the present invention circuit diagram operating principle, also please refers to shown in Fig. 3, first connects the filter rectifier 2
Input power (alternating current) is connect, makes input power electric current Ii via the filter inductance L of the filter rectifier 2mAnd filter capacitor CmFilter
Wave, while with the full-wave rectifier D of the filter rectifier 2rIt is rectified, which can carry out alternating current
Filtering and rectification, and prevent electromagnetic interference, then via the first transistor Q of the DC-DC converter 31With the one or two pole
Pipe D1Alternate conduction makes the first inductance L of the DC-DC converter 31It operates in continuum boundary conduction mode to be boosted, just
It can be in the first capacitor C of the AC/DC converter 41With the second capacitor C2Both ends, which generate, is higher than input supply voltage Vi peak value
Stable DC voltage, the voltage after making rectification are converted into fixed DC voltage, other than it can maintain constant DC voltage, together
When have both function because of debugging functions, and do not change because mains input voltage changes, then this DC voltage transferred into the DC/AC
The first capacitor C of converter 41, the second capacitor C2, second transistor Q2, third transistor Q3And multiwinding transformer T makees high frequency
Switch alternate conduction control, so that it may obtain the alternating voltage of required LED light string 6 in the secondary side of multiwinding transformer T, this is straight
DC voltage can be converted into the high frequency square wave alternating voltage of array different voltages by stream/a-c transducer 4, then by this alternating current
After pressure is via the rectification of multiple full-wave rectifying circuit 5, multiple full-wave rectifying circuit 5 can be by AC rectification at stable straight
Operating voltage is flowed, with the LED light string 6 for providing electric current to be driven multiple different colours, if the LED light string 6 need to dim function
Can, then adjusting control circuit 7 and microcontroller 8, to carry out brightness adjustment control, each LED light string 6 are connected in a other LED light string 6
Output power then passes through the number of turns design of multiwinding transformer T, each own to reach different characteristics or color LED light string 6
Fixed load output power, more can isolated fault 6 circuit of LED light string, and unlikely influence other normal LED light strings 6；Such as
This, reaches each 6 constant voltage of LED light string by the stable DC voltage of the DC-DC converter 3 and controls, to be suitable for difference
Mains input voltage change, then multiple and different colors are reached by the multiwinding transformer T of the AC/DC converter 4
The respective full-wave rectifying circuit 5 of each freedom of LED light string 6 drives, and not only reduces volume, reduces loss, with more high efficiency, it is low at
This, structure is simple and collocation brightness adjustment control person, and can be energy saving, prolong the service life.
Above-described embodiment is specifically described only for presently preferred embodiments of the present invention, and the embodiment is not to limit
Fixed claim of the invention, it is such as other without departing from the equivalent change completed under disclosed technological means
With modification, it is intended to be limited solely by the claim that the present invention is covered.
Claims (4)
1. one kind has efficient various colors LED light Shared Drive, it is equipped with filter rectifier and connects input power, it should
Filter rectifier is connected by filter inductance, filter capacitor and full-wave rectifier and is formed, which can be handed over
The filtering and rectification of galvanic electricity, and prevent electromagnetic interference, it is characterised in that:
DC-DC converter is connected to the filter rectifier, and the DC-DC converter is by the first inductance, the one or two pole
Pipe and the first transistor connect composition, which is converted into the voltage after rectification fixed DC voltage；
AC/DC converter is connected to the DC-DC converter, and the AC/DC converter is by first capacitor, second
Capacitor, second transistor, third transistor and multiwinding transformer connect composition, and the AC/DC converter is by direct current
Pressure is converted into the high-frequency ac square-wave voltage of array different voltages；
Multiple full-wave rectifying circuits are connected to the AC/DC converter, and the full-wave rectifying circuit is by the second diode, third
Diode and third capacitor connect composition, the full-wave rectifying circuit by AC rectification at stable direct-current working volts, with
Electric current is provided to drive the LED light string of multiple and different colors, LED light string Multiple coil transformation corresponding with the full-wave rectifying circuit
Device and have multiple groups connection setting, the LED light string by plurality of LEDs lamp connect bunchiness.
2. having efficient various colors LED light Shared Drive as described in claim 1, which is characterized in that the direct current/
The first transistor of direct current transducer is connected with drive integrated circult, and the DC-DC converter is by the drive integrated circult control
System, which has the function of constant voltage output and high power factor, and its DC voltage is not because alternating current inputs electricity
Buckling is dynamic and changes, and the first inductance of the DC-DC converter can operate in continuum boundary current-mode.
3. having efficient various colors LED light Shared Drive as described in claim 1, which is characterized in that the direct current/
The second transistor and third transistor of a-c transducer are connected with drive integrated circult, and the AC/DC converter is by the drive
Dynamic integrated circuit control, what which had the function of fixed frequency and on-state rate replaces switching.
4. having efficient various colors LED light Shared Drive as described in claim 1, which is characterized in that by changing
Become the number of turns of the multiwinding transformer to change the output power of each LED light string, each LED light be serially connected with adjusting control circuit and
Microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910579467.9A CN110351925A (en) | 2019-06-28 | 2019-06-28 | With efficient various colors LED light Shared Drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910579467.9A CN110351925A (en) | 2019-06-28 | 2019-06-28 | With efficient various colors LED light Shared Drive |
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| Publication Number | Publication Date |
|---|---|
| CN110351925A true CN110351925A (en) | 2019-10-18 |
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| CN201910579467.9A Pending CN110351925A (en) | 2019-06-28 | 2019-06-28 | With efficient various colors LED light Shared Drive |
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| CN105530724A (en) * | 2016-01-14 | 2016-04-27 | 华南理工大学 | SCC-based independent dimming multi-path light emitting diode (LED) driving circuit capable of current sharing |
| CN208572494U (en) * | 2018-06-29 | 2019-03-01 | 珠海市富群电子有限公司 | A kind of constant-voltage LED power supply of dual output |
| CN208623949U (en) * | 2018-07-20 | 2019-03-19 | 珠海众邦科技有限公司 | A kind of LED light source of the double light sources of twin voltage |
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2019
- 2019-06-28 CN CN201910579467.9A patent/CN110351925A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101631410A (en) * | 2009-08-24 | 2010-01-20 | 英飞特电子（杭州）有限公司 | AC-DC LED drive circuit with high power factor |
| CN102630111A (en) * | 2011-02-07 | 2012-08-08 | 赛普拉斯半导体公司 | Mutli-string led current control system and method |
| CN104349551A (en) * | 2013-08-02 | 2015-02-11 | 松下电器产业株式会社 | Illumination apparatus and lighting device used thereby |
| CN104519635A (en) * | 2013-09-27 | 2015-04-15 | 东芝照明技术株式会社 | Power supply circuit and luminaire |
| CN105281577A (en) * | 2015-06-19 | 2016-01-27 | 惠科电子（深圳）有限公司 | Power amplifier power supply circuit and TV power strip |
| CN105530724A (en) * | 2016-01-14 | 2016-04-27 | 华南理工大学 | SCC-based independent dimming multi-path light emitting diode (LED) driving circuit capable of current sharing |
| CN105530725A (en) * | 2016-01-15 | 2016-04-27 | 华南理工大学 | SCC automatic feedback control-based multi-path LED drive circuit |
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Application publication date: 20191018 |