CN106793290B - A kind of isolated multipath flows LED drive power - Google Patents
A kind of isolated multipath flows LED drive power Download PDFInfo
- Publication number
- CN106793290B CN106793290B CN201611182376.4A CN201611182376A CN106793290B CN 106793290 B CN106793290 B CN 106793290B CN 201611182376 A CN201611182376 A CN 201611182376A CN 106793290 B CN106793290 B CN 106793290B
- Authority
- CN
- China
- Prior art keywords
- paths
- leds lamp
- cathode
- anode
- capacitance
- 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.)
- Expired - Fee Related
Links
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]
- H05B45/40—Details of LED load 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]
-
- 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 present invention relates to a kind of isolated multipaths to flow LED drive power.Including half-bridge constant current resonant network, equalizing-current network and LED light load circuit, by the LED drive circuit for the resonant inductance in the constant current resonant network being constituted with method in parallel again after the primary windings in series in the equalizing-current network n module, the 2 paths of LEDs load of each module drive, the multi-path flow equalizing LED drive power realizes the stream of 2n paths of LEDs load by primary winding parallel, equal galvanic electricity appearance etc., wherein, n is the natural number more than or equal to 2.Multi-path flow equalizing circuit proposed by the invention, primary winding parallel is flowed and flows combination with capacitance, stream output is realized in the load of the LED light of tetra- tunnels Ke Wei or the arbitrary identical or different number in the roads 2n, has many advantages, such as that circuit is simple, efficient and stream effect is good.
Description
Technical field
The present invention relates to a kind of isolated multipaths to flow LED drive power.
Background technology
LED is favored as new generation of green lighting electric light source with the advantages that its long lifespan, light efficiency height, energy conservation and environmental protection deeply,
In street lamp, tunnel etc., high-power illuminations occasion is widely used.LED light needs constant-current driving power supply to drive work, and
The performance of LED drive power directly affects the reliably working of entire LED illumination System.
In practical applications great power LED due to lamp bead number it is more, often require to use the structure of LED multi-path parallel connection,
However the V-I characteristics difference of different branch LED can lead to the problem of each road current unevenness etc., it is therefore desirable to when studying multiple-channel output
Equal Flow Policy.It is passive to flow since circuit realizes that simple, stream effect is good, easy extension in various sharing control schemes, it answers
With more and more extensive.
Invention content
LED drive power is flowed the purpose of the present invention is to provide a kind of isolated multipath, it can be achieved that arbitrary 2N paths of LEDs lamps
The stream output of each paths of LEDs lamp load when number is identical or different, has that circuit is simple, efficient and stream effect is good etc. excellent
Point.
To achieve the above object, the technical scheme is that：A kind of isolated multipath flows LED drive power, including
Half-bridge constant current resonant network, equalizing-current network and LED light load circuit, the LED light load circuit include 2N paths of LEDs lamp loads；
Resonant inductance in the half-bridge constant current resonant network with after the primary windings in series of the equalizing-current network again it is in parallel into
And N number of LED driver circuit module is constituted, the stream of the 2N paths of LEDs lamp load is then realized by the equalizing-current network；It is described
Equalizing-current network includes first to N transformers, the 1st to 2N-1 capacitances, the 1st to 2N diodes；The anode of 1st diode with
The cathode of 2nd diode is connected, and through the first end of the 1st capacitance connection to the 1st transformer secondary output winding, the 1st diode
Cathode is connect with the anode of the 1st paths of LEDs lamp load, and the cathode of the 1st paths of LEDs lamp load is connected to the 1st transformer secondary output winding
Second end, the ends GND, the anode of the 2nd diode are connect with the cathode of the 2nd paths of LEDs lamp load, and the anode of the 2nd paths of LEDs lamp load is even
Connect the cathode of the 3rd paths of LEDs lamp load, and the second end through N+1 capacitance connections to the 2nd transformer secondary output winding, the ends GND；The
The anode of 2i-1 diodes is connected with the cathode of 2i diodes, and through the i-th capacitance connection to the i-th transformer secondary output winding
First end, the cathode of 2i-1 diodes are connect with the anode of 2i-1 paths of LEDs lamp loads, the anode and 2i of 2i diodes
The cathode of paths of LEDs lamp load connects, the cathode of the anode connection 2i+1 paths of LEDs lamp loads of 2i paths of LEDs lamp loads, and through the
Second end of the N+i capacitance connections to i+1 transformer secondary output winding, the ends GND；The anode and 2N diodes of 2N-1 diodes
Cathode be connected, and through the first end of N capacitance connections to N transformer secondary output windings, the cathode of 2N-1 diodes with
The anode connection of 2N-1 paths of LEDs lamp loads, the anode of 2N diodes are connect with the cathode of 2N paths of LEDs lamp loads, 2N
The second end of the anode connection N transformer secondary output windings of paths of LEDs lamp load, the ends GND；Wherein, 1≤i≤N-1, wherein N is
Natural number more than or equal to 2.
In an embodiment of the present invention, the half-bridge constant current resonant network include switching tube S1, S2, inductance Lr, Ls1 extremely
Lsn, capacitance Cr, Cs；The grid of switching tube S1, S2 are connected to a control module, and the drain electrode connection input power of switching tube S1 is just
Pole, switching tube S1 source electrode connect with one end of the drain electrode of switching tube S2, capacitance Cr, the source electrode and input power of switching tube S2
Cathode, one end of inductance Lr, first to N primary windings second end connection, the other end of capacitance Cr and inductance Lr
The other end, capacitance Cs one end connection, the other end of capacitance Cs with first to N primary windings first end company
It connects.
In an embodiment of the present invention, each paths of LEDs lamp load of the 2N paths of LEDs lamp load is by multiple LED light strings
It is formed in parallel with a capacitance after connection connection.
In an embodiment of the present invention, the LED light number of each paths of LEDs lamp load is identical or different.
In an embodiment of the present invention, the N is 2, and the equalizing-current network includes the 1st to the 3rd capacitance, the 1st to the 4th two pole
Pipe；The anode of 1st diode is connected with the cathode of the 2nd diode, and through the 1st capacitance connection to the 1st transformer secondary output winding
First end, the cathode of the 1st diode connect with the anode of the 1st paths of LEDs lamp load, and the cathode of the 1st paths of LEDs lamp load is connected to
The anode at the second end of the 1st transformer secondary output winding, the ends GND, the 2nd diode is connect with the cathode of the 2nd paths of LEDs lamp load, and the 2nd
The cathode of anode the 3rd paths of LEDs lamp load of connection of paths of LEDs lamp load, and through the 3rd capacitance connection to the 2nd transformer secondary output winding
Second end, the ends GND；The anode of 3rd diode is connected with the cathode of the 4th diode, and becomes through the 2nd capacitance connection to the 2nd
The first end of depressor secondary windings, the cathode of the 3rd diode are connect with the anode of the 3rd paths of LEDs lamp load, the sun of the 4th diode
Pole is connect with the cathode of the 4th paths of LEDs lamp load, and the second of anode the 2nd transformer secondary output winding of connection of the 4th paths of LEDs lamp load
End, the ends GND.
In an embodiment of the present invention, in the case that N is 2, i.e., when 4 paths of LEDs flow, the output electricity of each paths of LEDs lamp load
Levelling mean value is：
Wherein, I11、I12、I21、I22The output current average value of 1st to the 4th paths of LEDs lamp load respectively；For the 1st capacitance
Charging current,For the 2nd, charging current of the 3rd capacitance,For the 1st, the 3rd capacitance discharge current,Respectively the 2nd
The discharge current of capacitance；Ts is a charging-discharging cycle, ta~tbFor capacitor charging time, tb~tcFor capacitor discharge time；
Under steady state operating conditions, the capacitor charging charge in each period is equal with its discharge charge, can obtain, to realize the stream of 4 paths of LEDs lamp loads.
Compared to the prior art, the invention has the advantages that：Multi-path flow equalizing circuit proposed by the invention, will become
Depressor armature winding parallel current-sharing flows the LED of combination, tetra- tunnels Ke Wei or the arbitrary identical or different number in the roads 2n with capacitance
Lamp load realizes stream output, has many advantages, such as that circuit is simple, efficient and stream effect is good.
Description of the drawings
Fig. 1 is that isolated multipath of the present invention flows LED drive power structural schematic diagram.
Fig. 2 is the ac equivalent circuit of resonant network.
Fig. 3 is the output current characteristic curve under different loads.
Fig. 4 is that simple equivalent circuit is flowed in the output of the roads n.
Fig. 5（a）、5（b）For the current flow paths figure one, two of transformer secondary winding.
Fig. 6 is the driving power model machine of 4 road flow equalizing circuits.
Fig. 7 is the roads different loads Xia Ge output current experimental waveform.
Fig. 8 is the 4 asynchronous output current waves of road output voltage.
Specific implementation mode
Below in conjunction with the accompanying drawings, technical scheme of the present invention is specifically described.
As shown in Figure 1, a kind of isolated multipath of the present invention flows LED drive power, including half-bridge constant current resonant network,
Equalizing-current network and LED light load circuit, the LED light load circuit include 2N paths of LEDs lamp loads；The half-bridge constant current Resonance Neural Network
Resonant inductance in network is in parallel again with after the primary windings in series of the equalizing-current network and then constitutes N number of LED drivings electricity
Road module then realizes the stream of the 2N paths of LEDs lamp load by the equalizing-current network；The equalizing-current network include first to
N transformers, the 1st to 2N-1 capacitances, the 1st to 2N diodes；The cathode phase of the anode and the 2nd diode of 1st diode
Connection, and through the first end of the 1st capacitance connection to the 1st transformer secondary output winding, the cathode and the 1st paths of LEDs lamp of the 1st diode are negative
The anode connection of load, the cathode of the 1st paths of LEDs lamp load are connected to the second end of the 1st transformer secondary output winding, the ends GND, and the 2nd two
The anode of pole pipe is connect with the cathode of the 2nd paths of LEDs lamp load, anode the 3rd paths of LEDs lamp load of connection of the 2nd paths of LEDs lamp load
Cathode, and the second end through N+1 capacitance connections to the 2nd transformer secondary output winding, the ends GND；The anode of 2i-1 diodes with
The cathode of 2i diodes is connected, and through the i-th capacitance connection to the first end of the i-th transformer secondary output winding, bis- poles 2i-1
The cathode of pipe is connect with the anode of 2i-1 paths of LEDs lamp loads, the cathode of the anode and 2i paths of LEDs lamp loads of 2i diodes
Connection, the cathode of the anode connection 2i+1 paths of LEDs lamp loads of 2i paths of LEDs lamp loads, and through N+i capacitance connections to i-th+
The second end of 1 transformer secondary output winding, the ends GND；The anode of 2N-1 diodes is connected with the cathode of 2N diodes, and passes through
N capacitance connections are to the first end of N transformer secondary output windings, the cathode and 2N-1 paths of LEDs lamp loads of 2N-1 diodes
Anode connection, the anode of 2N diodes connect with the cathode of 2N paths of LEDs lamp loads, the anode of 2N paths of LEDs lamp loads
Connect second end, the ends GND of N transformer secondary output windings；Wherein, 1≤i≤N-1, wherein N is the natural number more than or equal to 2.
The half-bridge constant current resonant network includes switching tube S1, S2, inductance Lr, Ls1 to Lsn, capacitance Cr, Cs；Switching tube
The grid of S1, S2 are connected to a control module, the drain electrode connection input power anode of switching tube S1, the source electrode of switching tube S1 and open
Close the drain electrode of pipe S2, one end connection of capacitance Cr, the source electrode of switching tube S2 and input power cathode, one end of inductance Lr, the
One connects to the second ends of N primary windings, the other end of capacitance Cr and the other end of inductance Lr, capacitance Cs one end
Connection, the other end of capacitance Cs are connect with first to N primary windings first end.
Each paths of LEDs lamp load of the 2N paths of LEDs lamp load is in parallel with a capacitance after being connected in series with by multiple LED light
It forms.The LED light number of each paths of LEDs lamp load is identical or different.
The N is 2, and the equalizing-current network includes the 1st to the 3rd capacitance, the 1st to the 4th diode；The anode of 1st diode
It is connected with the cathode of the 2nd diode, and through the first end of the 1st capacitance connection to the 1st transformer secondary output winding, the 1st diode
The anode of cathode and the 1st paths of LEDs lamp load connect, the cathode of the 1st paths of LEDs lamp load is connected to the 1st transformer secondary output winding
Second end, the ends GND, the anode of the 2nd diode connect with the cathode of the 2nd paths of LEDs lamp load, the anode of the 2nd paths of LEDs lamp load
Connect the cathode of the 3rd paths of LEDs lamp load, and the second end through the 3rd capacitance connection to the 2nd transformer secondary output winding, the ends GND；3rd
The anode of diode is connected with the cathode of the 4th diode, and through the 2nd capacitance connection to the first of the 2nd transformer secondary output winding
End, the cathode of the 3rd diode are connect with the anode of the 3rd paths of LEDs lamp load, the anode and the 4th paths of LEDs lamp load of the 4th diode
Cathode connection, the anode connection second end of the 2nd transformer secondary output winding of the 4th paths of LEDs lamp load, the ends GND.The case where N is 2
Under, i.e., when 4 paths of LEDs flow, the output current average value of each paths of LEDs lamp load is：
Wherein, I11、I12、I21、I22The output current average value of 1st to the 4th paths of LEDs lamp load respectively；For the 1st capacitance
Charging current,For the 2nd, charging current of the 3rd capacitance,For the 1st, the 3rd capacitance discharge current,Respectively the 2nd
The discharge current of capacitance；Ts is a charging-discharging cycle, ta~tbFor capacitor charging time, tb~tcFor capacitor discharge time；
Under steady state operating conditions, the capacitor charging charge in each period is equal with its discharge charge, can obtain, to realize the stream of 4 paths of LEDs lamp loads.
It is the specific implementation process of the present invention below.
For the constant-current characteristics of analysis circuit, it is assumed that static exciter inductance is sufficiently large, ignores its influence to load current,
N parallel module resonant inductance LsWithR eqIt is equivalent,R eqThe load equivalent resistance to transformer primary side is arrived for conversion, then Resonance Neural Network
The ac equivalent circuit of network is as shown in Figure 2.It can derive that equivalent load electric current is as follows：
Equivalent loadR eqOn electric current be：
（1）
From formula（1）As can be seen that working asWhen, resonant network is operated in constant current mode, output
Current peakWith load resistanceR eqIt is unrelated, it is only related with input voltage and resonant parameter.Gone out using Mathcad Software on Drawing
The output current peak value of resonant network as shown in Figure 3Frequency characteristic under corresponding different loads.As can be seen that
Resonant frequencyf rNear, the output current of different loads intersects at a point, and the output current of resonant network is not with negative at this point
The variation of load and change, can realize constant current output.
Transformers connected in parallel flows principle：
When the parameter all same of n parallel module, i.e.,,, and, ignore static exciter inductanceL m
Influence to output current can then obtain parallel module equivalent circuit as shown in Figure 4,For the voltage at parallel branch both ends,
Wherein Req1, Req2……ReqnFor the equiva lent impedance of load resistance conversion to transformer primary side.
Assuming that maximum output current is in the output of the roads n, corresponding equivalent load resistance, minimum output current is, corresponding equivalent load resistance, maximum stream error is, loading maximum unbalanced degree is.Then have：
The equal stream error of output of circuit is：
（2）
Due toR eqFor the equivalent load of full load, that is, have, therefore enableR eqb=R eq,R eqa=R eq/δ,δTo load maximum unbalanced degree, andδ>=1, then it can be obtained by formula (3-14)：
(3)
By formula (3) it is found that the equal stream error of load current is only related with the unbalanced degree of load, the unbalanced degree of load is got over
Greatly, then the equal stream error of output current is big.But as long as load is taken in the loading range of restriction, exporting equal stream error can protect
It holds in maximum equal stream errorIn the range of.
In order to further increase the stream effect of the roads 2n output current-sharing circuit, has studied a kind of transformers connected in parallel and flow and mould
The mixing current share scheme that equal galvanic electricity is held is bridged between block, by taking 4 paths of LEDs flow as an example, the stream principle of the current share scheme is as follows.
Fig. 5（a）、5（b）It is shown the current flow paths figure of transformer secondary winding, when secondary voltage is equal to（WithPhase is identical）When, shown in circulating pathway such as Fig. 5 (a) of electric current, 1 electric current of module passes throughC b1、D11、U 11, then flow back to
Transformer secondary winding, electric currentIt givesC b1Charging；2 electric current of module passes throughC b2、D21、U 21、C b3, then flow back to transformer secondary around
Group, electric currentIt givesC b2、C b3Charging.
When secondary voltage is equal toWhen, shown in circulating pathway such as Fig. 5 (b) of electric current, 1 electric current of module passes throughC b3、U 12、
D12、C b1, then flow back to transformer secondary winding, electric currentIt givesC b1、C b3Electric discharge；2 electric current of module passes throughU 22、D22、C b2, then flow back to
Transformer secondary winding, electric currentIt givesC b2Electric discharge.
Fig. 5（a）、5（b）The roads Zhong Ge load output current average value be：
（4）
Under steady state operating conditions, the capacitor charging charge in each period is equal with its discharge charge, can obtain, flowed to realize 4 tunnels.
To verify circuit accuracy, the driving power model machine of 4 road as shown in FIG. 6 flow equalizing circuit, experimental result have been built
As shown in Figure 7, Figure 8：
Fig. 7 is constant current experimental result, it can be seen that when load is 2 tunnels or four tunnels, output voltage exports when being 54V or 18V
Electric current summation is of substantially equal, and the total current error of circuit is respectively less than 1% when different LED loads, therefore suggests plans in different LED
Load way and each lamp voltage can keep total current constant when changing, and realize constant current function.
Fig. 8 is the 4 asynchronous output current waves of road output voltage, and 4 lamp voltages are respectivelyU o1=54V、U o2=42V、U o3
=30V、U o4=18V.From figure 7 it can be seen that when 4 lamp voltage difference, 4 tunnel output currents are of substantially equal, and maximum stream error is only
It is 0.32%, 4 tunnels may be implemented and flow.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (6)
1. a kind of isolated multipath flows LED drive power, it is characterised in that：Including half-bridge constant current resonant network, equalizing-current network
With LED light load circuit, the LED light load circuit includes 2N paths of LEDs lamp loads；It is humorous in the half-bridge constant current resonant network
The inductance that shakes is in parallel again with after the primary windings in series of the equalizing-current network and then constitutes N number of LED driver circuit module, and
The stream of the 2N paths of LEDs lamp load is realized by the equalizing-current network afterwards；The equalizing-current network includes first to N transformations
Device, the 1st to 2N-1 capacitances, the 1st to 2N diodes；The anode of 1st diode is connected with the cathode of the 2nd diode, and
First end through the 1st capacitance connection to the 1st transformer secondary output winding, the cathode and the 1st paths of LEDs lamp load of the 1st diode are just
Pole connects, and the cathode of the 1st paths of LEDs lamp load is connected to the second end of the 1st transformer secondary output winding, the ends GND, the 2nd diode
Anode is connect with the cathode of the 2nd paths of LEDs lamp load, the cathode of anode the 3rd paths of LEDs lamp load of connection of the 2nd paths of LEDs lamp load,
And the second end through N+1 capacitance connections to the 2nd transformer secondary output winding, the ends GND；The anode and 2i bis- of 2i-1 diodes
The cathode of pole pipe is connected, and through the i-th capacitance connection to the first end of the i-th transformer secondary output winding, the moon of 2i-1 diodes
Pole is connect with the anode of 2i-1 paths of LEDs lamp loads, and the anode of 2i diodes is connect with the cathode of 2i paths of LEDs lamp loads,
The cathode of the anode connection 2i+1 paths of LEDs lamp loads of 2i paths of LEDs lamp loads, and through N+i capacitance connections to i+1 transformation
The second end of device secondary windings, the ends GND；The anode of 2N-1 diodes is connected with the cathode of 2N diodes, and through N electricity
Hold the first end for being connected to N transformer secondary output windings, the anode of the cathode and 2N-1 paths of LEDs lamp loads of 2N-1 diodes
Connection, the anode of 2N diodes are connect with the cathode of 2N paths of LEDs lamp loads, the anode connection N of 2N paths of LEDs lamp loads
The second end of transformer secondary output winding, the ends GND；Wherein, 1≤i≤N-1, wherein N is the natural number more than or equal to 2.
2. a kind of isolated multipath according to claim 1 flows LED drive power, it is characterised in that：The half-bridge is permanent
It includes switching tube S1, S2, inductance Lr, Ls1 to Lsn, capacitance Cr, Cs to flow resonant network；The grid of switching tube S1, S2 are connected to one
Control module, the drain electrode connection input power anode of switching tube S1, the source electrode of switching tube S1 and the drain electrode of switching tube S2, capacitance Cr
One end connection, the source electrode of switching tube S2 and input power cathode, one end of inductance Lr, first to N primaries around
The second end connection of group, the other end of capacitance Cr are connect with one end of the other end of inductance Lr, capacitance Cs, the other end of capacitance Cs
It is connect respectively with first to N primary windings first end through inductance Ls1 to Lsn.
3. a kind of isolated multipath according to claim 1 or 2 flows LED drive power, it is characterised in that：The roads 2N
Each paths of LEDs lamp load of LED light load is formed in parallel after being connected in series with by multiple LED light with a capacitance.
4. a kind of isolated multipath according to claim 3 flows LED drive power, it is characterised in that：It is described per all the way
The LED light number of LED light load is identical or different.
5. a kind of isolated multipath according to claim 1 flows LED drive power, it is characterised in that：The N is 2, institute
It includes the 1st to the 3rd capacitance, the 1st to the 4th diode to state equalizing-current network；The cathode phase of the anode and the 2nd diode of 1st diode
Connection, and through the first end of the 1st capacitance connection to the 1st transformer secondary output winding, the cathode and the 1st paths of LEDs lamp of the 1st diode are negative
The anode connection of load, the cathode of the 1st paths of LEDs lamp load are connected to the second end of the 1st transformer secondary output winding, the ends GND, and the 2nd two
The anode of pole pipe is connect with the cathode of the 2nd paths of LEDs lamp load, anode the 3rd paths of LEDs lamp load of connection of the 2nd paths of LEDs lamp load
Cathode, and the second end through the 3rd capacitance connection to the 2nd transformer secondary output winding, the ends GND；The anode and the 4th two of 3rd diode
The cathode of pole pipe is connected, and through the first end of the 2nd capacitance connection to the 2nd transformer secondary output winding, the cathode of the 3rd diode with
The anode connection of 3rd paths of LEDs lamp load, the anode of the 4th diode are connect with the cathode of the 4th paths of LEDs lamp load, the 4th paths of LEDs lamp
The second end of anode the 2nd transformer secondary output winding of connection of load, the ends GND.
6. a kind of isolated multipath according to claim 5 flows LED drive power, it is characterised in that：The case where N is 2
Under, i.e., when 4 paths of LEDs flow, the output current average value of each paths of LEDs lamp load is：
Wherein, I11、I12、I21、I22The output current average value of 1st to the 4th paths of LEDs lamp load respectively；For filling for the 1st capacitance
Electric current,For the 2nd, charging current of the 3rd capacitance,For the 1st, the 3rd capacitance discharge current,Respectively the 2nd capacitance
Discharge current；Ts is a charging-discharging cycle, ta~tbFor capacitor charging time, tb~tcFor capacitor discharge time；
Under steady state operating conditions, the capacitor charging charge in each period is equal with its discharge charge, can obtain, to realize the stream of 4 paths of LEDs lamp loads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182376.4A CN106793290B (en) | 2016-12-20 | 2016-12-20 | A kind of isolated multipath flows LED drive power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182376.4A CN106793290B (en) | 2016-12-20 | 2016-12-20 | A kind of isolated multipath flows LED drive power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106793290A CN106793290A (en) | 2017-05-31 |
| CN106793290B true CN106793290B (en) | 2018-08-17 |
Family
ID=58889416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611182376.4A Expired - Fee Related CN106793290B (en) | 2016-12-20 | 2016-12-20 | A kind of isolated multipath flows LED drive power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106793290B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108235516B (en) * | 2018-01-18 | 2020-04-10 | 福州大学 | LED drive circuit with constant current and current sharing characteristics |
| CN108055736B (en) * | 2018-01-18 | 2019-12-31 | 福州大学 | Non-isolated full-bridge LED constant current driving power supply |
| CN108012385B (en) * | 2018-01-18 | 2019-12-31 | 福州大学 | Non-isolated multi-path current-sharing full-bridge LED drive circuit |
| CN108449831B (en) * | 2018-03-14 | 2019-07-09 | 福州大学 | A kind of High Power Factor long-life LED drive power and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201639829U (en) * | 2010-02-24 | 2010-11-17 | 英飞特电子（杭州）有限公司 | Multi-resonance circuit applicable to multi-path LED accurate constant-current drive |
| CN102647823A (en) * | 2011-02-22 | 2012-08-22 | 英飞特电子（杭州）有限公司 | Constant current driving circuit for LED (Light Emitting Diode) lamp |
| CN103118460A (en) * | 2013-01-30 | 2013-05-22 | 福州大学 | Novel multi-path LED passive current-equalizing circuit and LED driving power source |
-
2016
- 2016-12-20 CN CN201611182376.4A patent/CN106793290B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201639829U (en) * | 2010-02-24 | 2010-11-17 | 英飞特电子（杭州）有限公司 | Multi-resonance circuit applicable to multi-path LED accurate constant-current drive |
| CN102647823A (en) * | 2011-02-22 | 2012-08-22 | 英飞特电子（杭州）有限公司 | Constant current driving circuit for LED (Light Emitting Diode) lamp |
| CN103118460A (en) * | 2013-01-30 | 2013-05-22 | 福州大学 | Novel multi-path LED passive current-equalizing circuit and LED driving power source |
Non-Patent Citations (2)
| Title |
|---|
| 《LED 驱动电路及多路均流技术探讨》;吴思远 等;《中国照明电器》;20120625(第6期);9-10 * |
| 《基于半桥变换器的多路LED电容均流特性的研究》;汪兆锦 等;《中国照明电器》;20150425(第4期);1-5 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106793290A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106793290B (en) | A kind of isolated multipath flows LED drive power | |
| CN107155232B (en) | A kind of High Power Factor LED constant current driving power and its control method | |
| CN101902859B (en) | Multi-path constant-current drive circuit | |
| CN103281823B (en) | There is the multiple power supplies system of constant current and constant voltage output | |
| US20020011801A1 (en) | Power feedback power factor correction scheme for multiple lamp operation | |
| CN103051198B (en) | Staggered parallel flyback driving power supply | |
| CN103944396A (en) | LLC resonance type three-port DC-DC converter and control method thereof | |
| CN103118460B (en) | Novel multi-path LED passive current-equalizing circuit and LED driving power source | |
| CN101951713A (en) | Current self-balanced multipath output resonant converter | |
| CN109587876A (en) | Self-adaptive non-loss is absorbed without bridge single-stage multiple-channel output LED drive power | |
| CN108809091B (en) | Single-switch buck multi-path constant-current output switch converter | |
| CN201639829U (en) | Multi-resonance circuit applicable to multi-path LED accurate constant-current drive | |
| CN102137524A (en) | High-efficiency control method for balance-driving light-emitting diode (LED) | |
| CN105530725A (en) | SCC automatic feedback control-based multi-path LED drive circuit | |
| CN101888731A (en) | Driving circuit and driving method of light emitting diode | |
| CN105392234B (en) | Multipath current-sharing output LED (Light-Emitting Diode) driving power supply and dimming method | |
| CN109392210A (en) | The LED illumination driving circuit of no several levels electric current output | |
| Chen et al. | A novel three level full bridge resonant dc-dc converter suitable for high power wide range input applications | |
| CN103337961A (en) | High-voltage transformation ratio bidirectional DC converter and control method thereof | |
| CN203301805U (en) | Multichannel power supply system with constant current and constant voltage output | |
| CN102098842B (en) | Current transformer-based light-emitting diode (LED) driving circuit | |
| CN106973457B (en) | A kind of isolated form high-power LED driving power source that multiple-channel output flows and its implementation | |
| CN104716842A (en) | Resonant type single-stage-structure single-switch multi-channel constant current output power-factor correction converter topology and control method thereof | |
| CN204794700U (en) | Boost circuit system and on -vehicle solar airconditioning | |
| CN110012574A (en) | A kind of mixing control LED drive circuit of the single-stage without bridge Sepic and LLC |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 Termination date: 20201220 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |