CN109618469A - A kind of linear High Power Factor driving circuit - Google Patents
A kind of linear High Power Factor driving circuit Download PDFInfo
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- CN109618469A CN109618469A CN201910077832.6A CN201910077832A CN109618469A CN 109618469 A CN109618469 A CN 109618469A CN 201910077832 A CN201910077832 A CN 201910077832A CN 109618469 A CN109618469 A CN 109618469A
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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]
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- 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 discloses a kind of linear High Power Factor driving circuit, including power supply, rectifier and multiple drive circuit units, power supply is connect by rectifier with first drive circuit unit；Each drive circuit unit includes LED load, electronic filter, electrolytic capacitor, galvanostat segment circuit unit and current sense resistor, LED load, electronic filter connect to form the first branch and in parallel with electrolytic capacitor, pass through isolation sectionaliser connection between the first branch of adjacent driven circuit unit；The output end of the first branch is connect with the input terminal of galvanostat segment circuit unit, the output end of galvanostat segment circuit unit is connected with one end of current sense resistor, current sense resistor in adjacent driven circuit unit is sequentially connected in series, and the current sense resistor ground connection in the last one drive circuit unit.The present invention uses fragmentary works mode, so that the operating current waveform of load is followed voltage waveform, thus increase power factor.
Description
Technical field
The present invention relates to a kind of linear High Power Factor driving circuits, belong to electronic drive circuit control technology field.
Background technique
LED is as a kind of efficient new light sources, and due to long with the service life, low energy consumption, energy conservation and environmental protection, is just being widely used in each
Field illumination.
At present all there is the contradiction of high PFC Yu ripple-free technology in LED drive power.IEC61000-3-
2.2000 standards regulation inputs PFC(power factor control power factor controlling in the case where exporting ripple-free)
>=0.98, THD(Total Harmonic Distortion total harmonic distortion)≤10%, and ripple-free in the prior art drives
Circuit is hard to reach the High Power Factor requirement proposed in standard.
Summary of the invention
To solve the above problems, the purpose of the present invention is to provide a kind of linear High Power Factor driving circuits.
In order to reach the goals above, the technical solution adopted by the present invention is that: a kind of linear High Power Factor driving circuit, packet
Power supply, rectifier and multiple drive circuit units are included, the power supply passes through the rectifier and first driving circuit
Unit connection；
Each drive circuit unit include LED load, electronic filter, electrolytic capacitor, galvanostat segment circuit unit and
Current sense resistor, the LED load, electronic filter connect to form the first branch, and the electrolytic capacitor is connected in parallel on described
The both ends of one branch are connected between the first branch of two neighboring drive circuit unit by the way that sectionaliser is isolated；
The output end of the first branch is connect with the input terminal of the galvanostat segment circuit unit, the galvanostat segmentation electricity
The output end of road unit is connected with one end of the current sense resistor, the electricity in adjacent each drive circuit unit
Stream detection resistance is sequentially connected in series, and the current sense resistor ground connection in the last one described drive circuit unit；
As input voltage is increased to peak value, by constant current of first drive circuit unit into the last one drive circuit unit
Device segment circuit unit is connected one by one, and the galvanostat segment circuit unit in previous drive circuit unit is switched to by being connected
Off state, until the galvanostat segment circuit unit conducting in the last one drive circuit unit, other drive circuit units
In galvanostat segment circuit unit cut-off；
As input voltage is reduced from peak value, by perseverance of the penultimate drive circuit unit into first drive circuit unit
Stream device segment circuit unit is connected one by one, and the galvanostat segment circuit unit in the latter drive circuit unit is switched by conducting
For off state, until the galvanostat segment circuit unit conducting in first drive circuit unit, other drive circuit units
In galvanostat segment circuit unit cut-off.
Further, the galvanostat segment circuit unit includes amplifier, power tube, the amplifier it is same mutually defeated
Enter end connection reference voltage, the output end of the amplifier connect with the grid of the power tube, the source electrode of the power tube and
The ungrounded end of current sense resistor in same drive circuit unit connects, the centre of the power tube and current sense resistor
Connecting pin is connect with the inverting input terminal of the amplifier；
The output end of the first branch in same drive circuit unit is connect with the drain electrode of the power tube.
Further, the isolation sectionaliser is diode, triode or field-effect tube.
Further, the anode of the electrolytic capacitor is connect with one end of LED load, the cathode and electricity of the electrolytic capacitor
One end of subfilter connects.
Optionally, the drive circuit works are in fieldwork mode.
Optionally, the drive circuit works are in floating ground operating mode.
Optionally, the LED load includes one or more concatenated LED light.
Further, in the case that the galvanostat segment circuit unit in i-th of drive circuit unit is connected, the drive
The current formula of dynamic circuit are as follows:
If i=N, N are the total quantity of drive circuit unit in driving circuit, then, wherein I is driving circuit electric current,
VREFFor preset reference voltage, RNFor the resistance value of the current sense resistor in the last one drive circuit unit；
If i < N, N are the total quantity of drive circuit unit in driving circuit, then, wherein I is driving circuit
Electric current, VREFFor preset reference voltage, RiFor the resistance value of the current sense resistor in i-th of drive circuit unit, Ri+…+RN
Indicate i-th of drive circuit unit to the sum of the resistance value of current sense resistor in a last drive circuit unit.
By using above-mentioned technical proposal, compared with the prior art a kind of linear High Power Factor driving circuit of the present invention has
It has the advantage that
1, using the multi-stage constant current operating mode with multiple drive circuit units, each drive circuit unit work is different
Under voltage and current, galvanostat segment circuit unit successively alternate conduction and cut-off in the unit of each driving circuit makes to load
Operating current waveform can follow voltage waveform completely, electric current is identical with voltage-phase, to improve power factor, PFC
Up to 0.99.
2, the number of drive circuit unit can be adjusted freely according to demand, using self-adaptive current segmented model, therefore be answered
It with flexible, adjusts simple and convenient, can satisfy the technical requirements of different clients.
3, in each drive circuit unit, electrolytic capacitor is in parallel therewith while LED load connects electronic filter, makes whole
During a drive circuit works, the current ripples in each stage are than control within 3%.
4, the connection isolation sectionaliser between two neighboring drive circuit unit, ensure that filter does not interfere with each other.
5, the contradiction of LED illumination industry high PFC and ripple-free is solved.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of linear High Power Factor driving circuit in the embodiment of the present invention one；
Attached drawing 2 is that the structure of the galvanostat segment circuit unit of linear High Power Factor driving circuit in the embodiment of the present invention one is shown
It is intended to；
Attached drawing 3 is the structural schematic diagram of the filter of linear High Power Factor driving circuit in the embodiment of the present invention one；
Attached drawing 4 is the structural schematic diagram of linear High Power Factor driving circuit in the embodiment of the present invention two；
Attached drawing 5 is the operating current waveform diagram of the linear High Power Factor driving circuit of the present invention.
Figure label are as follows:
1, rectifier；2, drive circuit unit；21, it loads；22, filter；23, electrolytic capacitor；24, galvanostat segment circuit list
Member；25, current sense resistor；3, sectionaliser is isolated；
Wherein:
220, the first amplifier；221, the first power tube；222, the second power tube；223, third power tube；224, the 4th power
Pipe；225, the 5th power tube；226, the first galvanostat；227, first resistor；228, second resistance；229, capacitor；
241, amplifier；242, power tube.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
It covers and non-exclusive includes.
" preceding " and " rear " in the application is according to unified direction definition, is " preceding " close to power supply, far from power supply
For " rear ", the circuit as shown in attached drawing 1 and attached drawing 4, power supply is in the leftmost side, therefore left side is " preceding ", and right side is " rear ".
Embodiment one
With reference to figures 1 through attached drawing 3, the linear High Power Factor driving circuit of one of the present embodiment, including power supply, input terminal with
Rectifier 1, the sequentially connected multiple drive circuit units 2 of power supply connection, it is most left in first drive circuit unit 2(Fig. 1
One drive circuit unit) it is connected with the output end of rectifier 1, it is assumed that N number of drive circuit unit is provided in the present embodiment
2, the rectifier 1 in 2 distance map 1 of n-th drive circuit unit is farthest (the most right drive circuit unit in Fig. 1).
As shown in Figure 1, each drive circuit unit 2 includes the one or more concatenated LED light of LED load 21(),
Electronic filter 22, electrolytic capacitor 23, galvanostat segment circuit unit 24 and current sense resistor 25, the LED load 21, electricity
The series connection of subfilter 22 forms the first branch, and the electrolytic capacitor 23 is connected in parallel on the both ends of the first branch, two neighboring drive
It is connected between the first branch of dynamic circuit unit 2 by the way that sectionaliser 3 is isolated；
The output end of the first branch is connect with the input terminal of the galvanostat segment circuit unit 24, the galvanostat segmentation
High potential one end of the output end of circuit unit 24 and the current sense resistor 25 be (current sense resistor 25 shown in FIG. 1
Left end) it is connected, the current sense resistor 25 in adjacent each drive circuit unit 2 is sequentially connected in series, and the last one
Current sense resistor 25 in the drive circuit unit 2 is grounded.
In a kind of more specifically embodiment, in first drive circuit unit 2, LED load 21 and electrolytic capacitor
The output end of 23 junction connection rectifier 1.
It is connected between the first branch of the two neighboring drive circuit unit 2 by the way that sectionaliser 3 is isolated, more specifically
One end and electronic filter 22 and galvanostat in a drive circuit unit 2 that sectionaliser 3 is isolated in embodiment as shown in Figure 1:
The junction of segment circuit unit 24 is connected, and it is negative that LED in the other end and another drive circuit unit 2 of sectionaliser 3 is isolated
21 are carried to be connected with the junction of electrolytic capacitor 23.
Isolation sectionaliser 3 primarily serves the effect of isolation, guarantees that electronic filter 22 is not mutual in each drive circuit unit 2
Interference.Preferably, the use of sectionaliser 3 diode, triode or field-effect tube or other, which is isolated, can play corresponding function
Component.In the present embodiment, isolation sectionaliser 3 uses diode, the anode of diode and electricity in previous drive circuit unit 2
Subfilter 22 is connected with the junction of galvanostat segment circuit unit 24, the cathode and the latter driving circuit list of diode
LED load 21 is connected with the junction of electrolytic capacitor 23 in member 2.
In a kind of more specifically embodiment, the anode of electrolytic capacitor 23 is connected with the anode of LED load 21,
The cathode of LED load 21 is connected with the input terminal of electronic filter 22, cathode and the electronic filter 22 of electrolytic capacitor 23
Output end is connected.
The structure setting of ripple-free unit can reduce output ripple electric current, made by filter 22 and electrolytic capacitor 23
Current ripples are obtained than controlling within 3%.The specific structure of electronic filter 22 in the present embodiment topology as shown in Fig. 3
Shown in structure chart: the first power tube 221 and the docking of the second power tube 222, while the first power tube 221 connects first resistor 227,
Third power tube 223 and the docking of the 4th power tube 224, the first galvanostat 226 is in parallel with capacitor 229, the first amplifier 220 and
5th power tube 225 is connected, while being connected with second resistance.
The present embodiment as shown in Fig. 1, using fieldwork mode, each galvanostat segment circuit unit 24 has
There is ground terminal.The ground terminal of each galvanostat segment circuit unit 24 is directly grounded.
A kind of specific structure of galvanostat segment circuit unit 24, constant current as shown in Fig. 2 are provided in the present embodiment
Device segment circuit unit topology diagram, galvanostat segment circuit unit 24 include amplifier 241, power tube 242, the amplification
The non-inverting input terminal of device 241 connects reference voltage, and the output end of the amplifier 241 is connect with the grid of the power tube 242,
The source electrode of the power tube 242 is connect with the ungrounded end of the current sense resistor 25 in same drive circuit unit 2, the function
Rate pipe 242 is connect with the intermediate connecting pin of current sense resistor 25 with the inverting input terminal of the amplifier 241；Same driving electricity
The output end of the first branch in road unit 2 is connect with the drain electrode of the power tube 242.
Different resistance values, each drive can be arranged in current sense resistor 25 in each drive circuit unit 2 according to the actual situation
Current sense resistor 25 in dynamic circuit unit 2, on the one hand plays the work of constant current detection in the drive circuit unit 2 where it
With another aspect also acts as the effect of switch detection, it may be assumed that galvanostat driving circuit list in the drive circuit unit 2 where it
When member 24 is connected, galvanostat drive circuit unit 24 in previous drive circuit unit 2 can be ended；Or where it
It, can be by galvanostat in the latter drive circuit unit 2 when galvanostat drive circuit unit 24 in drive circuit unit 2 ends
Drive circuit unit 24 is connected, specific as follows:
(crest voltage is risen to) in voltage uphill process, the galvanostat segment circuit from first drive circuit unit 2
Galvanostat segment circuit unit 24 of the unit 24 into the last one drive circuit unit 2, successively is become ending from conducting one by one,
That is: with the raising of input voltage, when the galvanostat segment circuit unit 24 in second drive circuit unit 2 is connected, first
Galvanostat segment circuit unit 24 in a drive circuit unit 2 ends, as voltage further increases, third driving circuit
Galvanostat segment circuit unit 24 in unit 2 is connected, and the galvanostat segment circuit unit in second drive circuit unit 2
24 cut-offs circuit sequentially until the galvanostat segment circuit unit 24 in the last one drive circuit unit 2 is connected, other drive
The cut-off of galvanostat segment circuit unit 24 in circuit unit 2 is (other than ending with the moment of conducting switching, in driving circuit
Only one galvanostat segment circuit unit 24 of same time conducting)；
Conversely, during voltage is from peak-fall, from galvanostat 24 to the first in penultimate drive circuit unit 2
Galvanostat segment circuit unit 24 in drive circuit unit 2 successively is become being connected from cut-off one by one, it may be assumed that with input voltage
It reduces, when the galvanostat segment circuit unit 24 in penultimate drive circuit unit 2 is connected, the last one driving circuit list
Galvanostat segment circuit unit 24 in member 2 ends, as voltage further decreases, in third last drive circuit unit 2
Galvanostat segment circuit unit 24 be connected, and the galvanostat segment circuit unit 24 in penultimate drive circuit unit 2
Cut-off circuits sequentially the conducting of galvanostat segment circuit unit 24 until in first drive circuit unit 2, other driving circuits
Galvanostat segment circuit unit 24 in unit 2 ends.It is (same in driving circuit other than ending with the moment of conducting switching
Only one galvanostat segment circuit unit 24 of one time conducting).During the above voltage increases and reduces, galvanostat segmentation electricity
The change procedure of road unit 24 is a reverse process.
The working principle that the specific galvanostat segment circuit unit 24 sequentially turns on or ends is as follows:
The LED load VF value of each drive circuit unit 2 can differently distribute LED voltage according to technical requirements.Such as: first driving
VF in circuit unit1=72V, VF in second drive circuit unit2=54V, VF in third drive circuit unit3=54V, the 4th
VF in a drive circuit unit4=54V, VFAlways=VF1+VF2+VF3+VF4=234V.After drive circuit works, after the rectification of bridge heap
Busbar voltage is begun to ramp up from 0V to 310V, and each drive circuit unit 2LED is lighted.Assuming that n drive circuit unit 2 is shared,
In voltage uphill process, circuit is started to work from first drive circuit unit 2, and operating current is at this time；When voltage, which rises to second drive circuit unit 2, to work, second drive
24 inverting input terminal of galvanostat segment circuit unit in dynamic circuit unit 2 generates voltage, i.e. in first drive circuit unit 2
The other end (right end shown in FIG. 1) voltage of current sense resistor 25 increases, since the electric current of current sense resistor 25 is constant, institute
It is increased with the left end voltage of current sense resistor 25 in first drive circuit unit 2 to more than reference voltage Vref
(25 resistance value of current sense resistor is arranged according to the actual situation), i.e. galvanostat segment circuit in first drive circuit unit 2
The voltage of 24 inverting input terminal of unit is higher than reference voltage, so that the galvanostat in first drive circuit unit 2 be made to be segmented electricity
Road unit 24 ends, and operating current is at this time；Similarly, when voltage rises to third
When drive circuit unit 2 works, the galvanostat segment circuit unit 24 in second drive circuit unit 2 ends, and first
Galvanostat segment circuit unit 24 in a drive circuit unit 2 keeps off state, and operating current is at this time；And so on, when voltage, which rises to n-th of drive circuit unit 2, to work, (n-1)th drive
Galvanostat segment circuit unit 24 in dynamic circuit unit 2 ends, and in first to (n-1)th drive circuit unit 2
Galvanostat segment circuit unit 24 is off state, and operating current is at this time。
Correspondingly, during dropping under voltage, the left end of the current sense resistor 25 in (n-1)th drive circuit unit 2
Voltage decreases below reference voltage, and the stream device segment circuit unit 24 in (n-1)th drive circuit unit 2 turns on and generates electricity
Stream, so that the electric current in the current sense resistor 25 and n-th of drive circuit unit 2 in (n-1)th drive circuit unit 2 be made to examine
The end voltage of the junction of measuring resistance 25 increases, i.e. 24 reverse phase of galvanostat segment circuit unit in n-th of drive circuit unit 2
The voltage of input terminal increases to above reference voltage, thus the galvanostat segment circuit unit 24 in n-th of drive circuit unit 2
Cut-off, operating current is at this time；Similarly, the galvanostat in the n-th -2 drive circuit units 2 point
Section circuit unit 24 is connected, and the galvanostat segment circuit unit 24 in (n-1)th drive circuit unit 2 ends, and n-th of drive
Galvanostat segment circuit unit 24 in dynamic circuit unit 2 keeps off state, and operating current is at this time；And so on, the galvanostat segment circuit unit in first drive circuit unit 2
When 24 conducting, the galvanostat segment circuit 24 in second drive circuit unit 2 ends, and third is electric to n-th of driving
Galvanostat segment circuit unit 24 in road unit 2 keeps off state, and operating current is at this time。
It can be seen that with the rising of voltage, operating current fromExtremelyIt becomes larger, and with the decline of voltage, operating current
FromExtremelyIt is gradually reduced, and current work waveform follows voltage waveform completely, realizes High Power Factor, as shown in Fig. 5.
Embodiment two
With reference to attached drawing 4, the difference of linear High Power Factor driving circuit and embodiment one in the present embodiment is only that:
The present embodiment, using floating ground operating mode, in multiple drive circuit units 2, remaining in addition to the last one is every
In a driving single channel unit, the ground terminal of galvanostat segment circuit unit 24 and the other end (Fig. 1 and the figure of current sense resistor 25
Right end shown in 4) it is connected；In the last one drive circuit unit 2, the ground terminal and electric current of galvanostat segment circuit unit 24
The other end of detection resistance 25 is grounded after being connected.
Isolation sectionaliser 3 in the present embodiment uses NPN triode, the collector of triode and previous driving circuit list
Electronic filter 22 is connected with the junction of galvanostat segment circuit unit 24 in member 2, the emitter and the latter of triode
LED load 21 is connected with the junction of electrolytic capacitor 23 in drive circuit unit 2.The base stage of triode connects collector.
No matter sectionaliser 3 is isolated using diode, triode or field-effect tube, and effect is to prevent next driving
The input terminal of galvanostat segment circuit unit 24 in the positive one drive circuit unit 2 forward of capacitor 23 in circuit unit 2
Voltage is provided, partition is played the role of.
The concrete operating principle of linear High Power Factor driving circuit is identical with embodiment one in the present embodiment.
In the embodiment of the present invention, using the fragmentary works mode with multiple drive circuit units, each driving circuit
Under different voltage, the galvanostat in the unit of each driving circuit successively works alternatively cell operation, makes the work electricity of load
Stream waveform can follow voltage waveform completely, and electric current is identical with voltage-phase, to improve power factor, PFC is up to 0.99；
The number of drive circuit unit can be adjusted freely according to demand, using self-adaptive current segmented model, therefore flexible in application, adjustment
It is simple and convenient, it can satisfy the technical requirements of different clients；In each drive circuit unit, while load connects electrolytic capacitor
Electronic filter is connected, during making entire drive circuit works, the current ripples in each stage are than control within 3%；In phase
Connection isolation sectionaliser, ensure that filter does not interfere with each other between adjacent two drive circuit units；Solves LED illumination industry
The contradiction of IEC standard and ripple-free.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of linear High Power Factor driving circuit, it is characterised in that: including power supply, rectifier (1) and multiple drivings electricity
Road unit (2), the power supply are connect by the rectifier (1) with first drive circuit unit (2)；
Each drive circuit unit (2) includes LED load (21), electronic filter (22), electrolytic capacitor (23), galvanostat
Segment circuit unit (24) and current sense resistor (25), the LED load (21), electronic filter (22) series connection form first
Branch, the electrolytic capacitor (23) are connected in parallel on the both ends of the first branch, and first of two neighboring drive circuit unit (2)
It is connected between road by the way that sectionaliser (3) are isolated；
The output end of the first branch is connect with the input terminal of the galvanostat segment circuit unit (24), the galvanostat point
The output end of section circuit unit (24) is connected with one end of the current sense resistor (25), adjacent each driving electricity
Current sense resistor (25) in road unit (2) is sequentially connected in series, and the electric current inspection in the last one described drive circuit unit (2)
Measuring resistance (25) ground connection；
As input voltage is increased to peak value, by first drive circuit unit (2) into the last one drive circuit unit (2)
Galvanostat segment circuit unit (24) be connected one by one, and the galvanostat segment circuit list in previous drive circuit unit (2)
First (24) are switched to off state by conducting, until the galvanostat segment circuit unit in the last one drive circuit unit (2)
(24) it is connected, galvanostat segment circuit unit (24) cut-off in other drive circuit units (2)；
As input voltage is reduced from peak value, by penultimate drive circuit unit (2) to first drive circuit unit (2)
In galvanostat segment circuit unit (24) be connected one by one, and the galvanostat segment circuit in the latter drive circuit unit (2)
Unit (24) is switched to off state by conducting, until the galvanostat segment circuit unit in first drive circuit unit (2)
(24) it is connected, galvanostat segment circuit unit (24) cut-off in other drive circuit units (2).
2. a kind of linear High Power Factor driving circuit according to claim 1, it is characterised in that: the galvanostat point
Section circuit unit (24) includes amplifier (241), power tube (242), and the non-inverting input terminal of the amplifier (241) connects benchmark
The output end of voltage, the amplifier (241) is connect with the grid of the power tube (242), the source electrode of the power tube (242)
It is connect with the ungrounded end of the current sense resistor (25) in same drive circuit unit (2), the power tube (242) and electric current
The intermediate connecting pin of detection resistance (25) is connect with the inverting input terminal of the amplifier (241)；
The output end of the first branch in same drive circuit unit (2) is connect with the drain electrode of the power tube (242).
3. a kind of linear High Power Factor driving circuit according to claim 1, it is characterised in that: the isolation sectionaliser
It (3) is diode, triode or field-effect tube.
4. a kind of linear High Power Factor driving circuit according to claim 1, it is characterised in that: the electrolytic capacitor
(23) anode is connect with one end of LED load (21), and the one of the cathode of the electrolytic capacitor (23) and electronic filter (22)
End connection.
5. a kind of linear High Power Factor driving circuit according to claim 1, it is characterised in that: the driving circuit work
Make in fieldwork mode.
6. a kind of linear High Power Factor driving circuit according to claim 1, it is characterised in that: the driving circuit work
Make in floating ground operating mode.
7. a kind of linear High Power Factor driving circuit according to claim 1, it is characterised in that: the LED load
It (21) include one or more concatenated LED light.
8. a kind of linear High Power Factor driving circuit according to claim 1, it is characterised in that: in i-th of driving electricity
In the case where galvanostat segment circuit unit (24) conducting in road unit (2), the current formula of the driving circuit are as follows:
If i=N, N are the total quantity of drive circuit unit in driving circuit, then, wherein I is driving circuit electric current, VREF
For preset reference voltage, RNFor the resistance value of the current sense resistor in the last one drive circuit unit；
If i < N, N are the total quantity of drive circuit unit in driving circuit, then, wherein I is driving circuit
Electric current, VREFFor preset reference voltage, RiFor the resistance value of the current sense resistor in i-th of drive circuit unit, Ri+…+RN
Indicate i-th of drive circuit unit to the sum of the resistance value of current sense resistor in a last drive circuit unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910077832.6A CN109618469A (en) | 2019-01-28 | 2019-01-28 | A kind of linear High Power Factor driving circuit |
| PCT/CN2019/083333 WO2020155413A1 (en) | 2019-01-28 | 2019-04-19 | Linear high power factor driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910077832.6A CN109618469A (en) | 2019-01-28 | 2019-01-28 | A kind of linear High Power Factor driving circuit |
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| CN109618469A true CN109618469A (en) | 2019-04-12 |
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| CN201910077832.6A Pending CN109618469A (en) | 2019-01-28 | 2019-01-28 | A kind of linear High Power Factor driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020155413A1 (en) * | 2019-01-28 | 2020-08-06 | 苏州菲达旭微电子有限公司 | Linear high power factor driving circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176806A (en) * | 2011-03-15 | 2011-09-07 | 谢俊国 | Multichannel multiphase-driving LED (Light Emitting Diode) power supply |
| CN102186282A (en) * | 2011-03-21 | 2011-09-14 | 中国航天科技集团公司第九研究院第七七一研究所 | Drive circuit capable of improving power factors of alternating current light emitting diode (AC LED) lamp |
| CN203233572U (en) * | 2013-03-19 | 2013-10-09 | 深圳市明微电子股份有限公司 | High power factor LED linearity constant current driving controller and LED driving device |
| CN203590567U (en) * | 2013-11-29 | 2014-05-07 | 电子科技大学 | AC power supply-based LED drive circuit with function of automatic illumination intensity adjusting |
| CN105813285A (en) * | 2014-12-31 | 2016-07-27 | 四川新力光源股份有限公司 | LED constant current driving device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI441560B (en) * | 2011-06-30 | 2014-06-11 | Interlight Optotech Corp | Light-emitting diode module and method for operating the same |
| CN208434144U (en) * | 2017-09-30 | 2019-01-25 | 飞利浦照明（中国）投资有限公司 | LED drive circuit and lamps and lanterns including the LED drive circuit |
| CN108156713B (en) * | 2018-01-05 | 2020-05-12 | 广州怡泰照明电子科技有限公司 | Self-adaptive LED lamp |
| CN109618469A (en) * | 2019-01-28 | 2019-04-12 | 苏州菲达旭微电子有限公司 | A kind of linear High Power Factor driving circuit |
-
2019
- 2019-01-28 CN CN201910077832.6A patent/CN109618469A/en active Pending
- 2019-04-19 WO PCT/CN2019/083333 patent/WO2020155413A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176806A (en) * | 2011-03-15 | 2011-09-07 | 谢俊国 | Multichannel multiphase-driving LED (Light Emitting Diode) power supply |
| CN102186282A (en) * | 2011-03-21 | 2011-09-14 | 中国航天科技集团公司第九研究院第七七一研究所 | Drive circuit capable of improving power factors of alternating current light emitting diode (AC LED) lamp |
| CN203233572U (en) * | 2013-03-19 | 2013-10-09 | 深圳市明微电子股份有限公司 | High power factor LED linearity constant current driving controller and LED driving device |
| CN203590567U (en) * | 2013-11-29 | 2014-05-07 | 电子科技大学 | AC power supply-based LED drive circuit with function of automatic illumination intensity adjusting |
| CN105813285A (en) * | 2014-12-31 | 2016-07-27 | 四川新力光源股份有限公司 | LED constant current driving device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020155413A1 (en) * | 2019-01-28 | 2020-08-06 | 苏州菲达旭微电子有限公司 | Linear high power factor driving circuit |
Also Published As
| Publication number | Publication date |
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| WO2020155413A1 (en) | 2020-08-06 |
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