CN106954296A - Remove the linear LED drive circuit of stroboscopic - Google Patents
Remove the linear LED drive circuit of stroboscopic Download PDFInfo
- Publication number
- CN106954296A CN106954296A CN201610847901.3A CN201610847901A CN106954296A CN 106954296 A CN106954296 A CN 106954296A CN 201610847901 A CN201610847901 A CN 201610847901A CN 106954296 A CN106954296 A CN 106954296A
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- CN
- China
- Prior art keywords
- drive circuit
- stroboscopic
- electric capacity
- power tube
- rectifier bridge
- 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.)
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Classifications
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention provides one kind and removes the linear LED drive circuit of stroboscopic, including, rectifier bridge, LED load, the first drive circuit, the second drive circuit and electric capacity；The input of input ac voltage access rectifier bridge carries out rectification；Electric capacity one end is connected with an output end of rectifier bridge, and the other end is connected with the first drive circuit respectively；The joint of rectifier bridge and electric capacity is connected with the second drive circuit；LED load one end is connected with the first drive circuit, and the other end is connected with the second drive circuit.It the advantage is that the voltage at electric capacity two ends again can not be by the loaded pressure drop clamper of lamp bead, within the same time, capacitance charging current is bigger, and two sections of voltages of electric capacity are higher, electric capacity exoergic amount is bigger, therefore the effect that nothing/low frequency dodges can be realized in the case of same capacity.
Description
Technical field
The linear LED drive circuit of stroboscopic is removed the present invention relates to one kind.
Background technology
In recent years, high-brightness LED illumination with specular removal, the long-life, high reliability and it is pollution-free the advantages of progressively take
For conventional light sources such as incandescent lamp, fluorescent lamps.Increasingly perfect with LED technology, the U.S. is in CEC-400-2015-038-
Clearly stroboscopic percentage is claimed in CMF JA10, although only implement, but well imagine or not California, USA at present
The large area that is bound to long future is implemented.
Especially for the high PF schemes of conventional linear, in conventional linear light modulation driving, because input can not power up solution, therefore
The energy for needing output electrolysis storage enough, could realize that LED nothing/low frequency dodges.But because Linear Driving working frequency all compares
It is relatively low, therefore very big electrolysis is needed, it could realize that nothing/low frequency of output dodges, when driver is limited by structural member space
When, output electrolysis can not be increased, therefore stroboscopic problem can not be solved.
The common linear LED drive circuits of high PF, as shown in figure 1, drive circuit 1 is used for modulating the output electricity of LED load
Flow (Iout), due to the presence of backfeed loop, when input voltage (Vin) is higher than LED load pressure drop (VLed), drive circuit 1
Start working, then output current is remained
Only it can just be charged when input voltage instantaneous value is less than lamp bead voltage on wherein electric capacity C1, and during lamp bead conducting
Two sections of voltages of electric capacity are waited by lamp bead clamper in Vled, are not difficult to learn that the energy of electric capacity storage is very limited by E=1/2CU^2, therefore
When whole modulated structure is limited causes capacitance C be limited, electric capacity can not provide enough energy, therefore nothing difficult to realize/low
Stroboscopic drives.
The content of the invention
The problem to be solved in the present invention is to provide one kind to remove the linear LED drive circuit of stroboscopic, is asked with solving above-mentioned technology
Topic, overcomes the defect of prior art.
The present invention provide one kind remove the linear LED drive circuit of stroboscopic, including, rectifier bridge, LED load, the first drive circuit,
Second drive circuit and electric capacity；The input of input ac voltage access rectifier bridge carries out rectification；Electric capacity one end and rectifier bridge
One output end is connected, and the other end is connected with the first drive circuit respectively；Rectifier bridge and the joint of electric capacity and the second driving electricity
Road is connected；LED load one end is connected with the first drive circuit, and the other end is connected with the second drive circuit.
The present invention provides one kind and removes the linear LED drive circuit of stroboscopic, can also have the feature that：First drive circuit
Including the first power tube, the first operational amplifier and total current setting resistance；The in-phase input end access of first operational amplifier
Reference voltage, inverting input is connected with the 3rd end of the first power tube, and output end is connected with the first end of the first power tube；The
The one end of second end of one power tube respectively with LED load, electric capacity is connected；Put with the first computing one end of total current setting resistance
The inverting input of big device is connected, other end ground connection.
The present invention provides one kind and removes the linear LED drive circuit of stroboscopic, can also have the feature that：First power tube is
FET, first end is grid, and the second end is drain electrode, and the 3rd end is source electrode.
The present invention provides one kind and removes the linear LED drive circuit of stroboscopic, can also have the feature that：Second drive circuit
Including the second power tube, the second operational amplifier and LED current setting resistance；The homophase input termination of second operational amplifier
Enter reference voltage, inverting input is connected with the 3rd end of the second power tube, and output end is connected with the first end of the second power tube；
Second end of the second power tube is connected with the joint of rectifier bridge and electric capacity；One end of LED current setting resistance and the second computing
The inverting input of amplifier is connected, and the other end is connected with the one end loaded.
The present invention provides one kind and removes the linear LED drive circuit of stroboscopic, can also have the feature that：Second power tube is
FET, first end is grid, and the second end is drain electrode, and the 3rd end is source electrode.
The present invention provides one kind and removes the linear LED drive circuit of stroboscopic, can also have the feature that：LED load it is negative
End is connected with the first drive circuit, and anode is connected with the second drive circuit.
The present invention provides one kind and removes the linear LED drive circuit of stroboscopic, can also have the feature that：Arrange the another of bridge
Individual output head grounding.
The present invention provides one kind and removes the linear LED drive circuit of stroboscopic, can also have the feature that：Rectifier bridge is by four
Diode is constituted.
The effect of invention and effect
One kind that the present invention is provided removes the linear LED drive circuit of stroboscopic, and the voltage at electric capacity two ends again can not be by LED lamp bead
Gross energy can be determined that within the same time, electric capacity fills by charging interval, charging current on loaded pressure drop Vled clampers, electric capacity
Electric current is bigger, and two sections of voltages of electric capacity are higher, and it is bigger that electric capacity puts ENERGY E, therefore can be realized in the case of same capacity
The effect that nothing/low frequency dodges.
Brief description of the drawings
Fig. 1 is traditional linear LED drive circuit figure.
Fig. 2 removes the linear LED drive circuit figure of stroboscopic for the present invention's.
Embodiment：
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 2 removes the linear LED drive circuit figure of stroboscopic for the present invention's.
As shown in Fig. 2 going the linear LED drive circuit of stroboscopic to include：Rectifier bridge, LED load, the first drive circuit, second
Drive circuit and electric capacity C1.
Rectifier bridge is made up of four diodes D1, D2, D3 and D4.Input ac voltage ACin accesses the input of rectifier bridge
Carry out rectification.
First drive circuit includes：First FET M1, the first operational amplifier OTA1 and total current setting resistance
Rcs_1.Second drive circuit includes, the second FET M2, the second operational amplifier OTA2 and LED current setting resistance Rcs_
2。
Electric capacity C1 one end is connected with an output end of rectifier bridge, the first FET of the other end and the first drive circuit
M1 drain electrode is connected.
First operational amplifier OTA1 in-phase input end access reference voltage V ref, inverting input and the first field-effect
Pipe OTA1 source electrode is connected, and output end is connected with the first FET OTA1 grid.Total current setting resistance Rcs_1 one end
It is connected with the first operational amplifier OTA1 inverting input, other end ground connection.
The joint of rectifier bridge and electric capacity is connected with the second FET M2 drain electrodes of the second drive circuit.
Second operational amplifier OTA2 in-phase input end access reference voltage V ref, inverting input and the second field-effect
Pipe M2 source electrode is connected, and output end is connected with the second FET M2 grid.LED current setting resistance Rcs_2 one end with
Second operational amplifier OTA2 inverting input is connected, and the other end is connected with the anode loaded.
The negative terminal of LED load is connected with the first FET M1 of the first drive circuit drain electrode.
Go the operation principle of the linear LED drive circuit of stroboscopic：
First drive circuit is used for the total current Itotal of modulating capacitor charging current Ic and the second drive circuit due to anti-
Road presence is fed back to, therefore：
Wherein：The feedback loop voltage of the drive circuits of Vcs_1- first.
Second drive circuit is used for modulating the output current Iout of LED load, and wherein output current is by the second driving current
Modulation, because backfeed loop is present, then output current Iout is：
Wherein：The current settings voltage of the drive circuits of Vcs_2- second.
Therefore the energy stored on electric capacity C1:
Wherein：
The energy stored on E- electric capacity；
C- capacitances；
Two sections of voltages of U- electric capacity；
Ic- capacitance charging currents；
T- capacitor charging times.
Therefore the quantity of electric charge is on electric capacity:
Q=CU=ICT------------------------------ formula (3)
Voltage U not can by the loaded pressure drop Vled clampers of LED lamp bead, therefore on electric capacity gross energy can by charging interval t, fill
Electric current Ic determines that within the same time, Ic is bigger, and two sections of voltage U of electric capacity are higher, and it is bigger that electric capacity puts ENERGY E, therefore equally
The effect that nothing/low frequency dodges can be realized in the case of capacity.
By formula (1), (2), (3) can know that electric capacity can be with Ic constant current charges：
。
Claims (8)
1. one kind removes the linear LED drive circuit of stroboscopic, it is characterised in that：
Including rectifier bridge, LED load, the first drive circuit, the second drive circuit and electric capacity；
The input that input ac voltage accesses the rectifier bridge carries out rectification；
Described electric capacity one end is connected with an output end of the rectifier bridge, the other end respectively with the first drive circuit phase
Even；
The joint of the rectifier bridge and the electric capacity is connected with second drive circuit；
Described LED load one end is connected with first drive circuit, and the other end is connected with second drive circuit.
2. according to claim 1 remove the linear LED drive circuit of stroboscopic, it is characterised in that：
Wherein, the first drive circuit includes, the first power tube, the first operational amplifier and total current setting resistance；
The in-phase input end access reference voltage of first operational amplifier, the of inverting input and first power tube
Three ends are connected, and output end is connected with the first end of first power tube；
The one end of second end of first power tube respectively with the LED load, the electric capacity is connected；
One end of the total current setting resistance is connected with the inverting input of first operational amplifier, other end ground connection.
3. according to claim 2 remove the linear LED drive circuit of stroboscopic, it is characterised in that：First power tube is field
Effect pipe, first end is grid, and the second end is drain electrode, and the 3rd end is source electrode.
4. according to claim 1 remove the linear LED drive circuit of stroboscopic, it is characterised in that：
Wherein, the second drive circuit includes, the second power tube, the second operational amplifier and LED current setting resistance；
The in-phase input end access reference voltage of second operational amplifier, the of inverting input and second power tube
Three ends are connected, and output end is connected with the first end of second power tube；
Second end of second power tube is connected with the joint of the rectifier bridge and the electric capacity；
One end of the LED current setting resistance is connected with the inverting input of second operational amplifier, the other end and institute
The one end for stating load is connected.
5. according to claim 4 remove the linear LED drive circuit of stroboscopic, it is characterised in that：Second power tube is field
Effect pipe, first end is grid, and the second end is drain electrode, and the 3rd end is source electrode.
6. according to claim 1 remove the linear LED drive circuit of stroboscopic, it is characterised in that：Wherein, the LED load
Negative terminal is connected with first drive circuit, and anode is connected with second drive circuit.
7. according to claim 1 remove the linear LED drive circuit of stroboscopic, it is characterised in that：Wherein, it is described to arrange the another of bridge
One output head grounding.
8. according to claim 1 remove the linear LED drive circuit of stroboscopic, it is characterised in that：Wherein, the rectifier bridge is by four
Individual diode composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847901.3A CN106954296A (en) | 2016-09-23 | 2016-09-23 | Remove the linear LED drive circuit of stroboscopic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847901.3A CN106954296A (en) | 2016-09-23 | 2016-09-23 | Remove the linear LED drive circuit of stroboscopic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106954296A true CN106954296A (en) | 2017-07-14 |
Family
ID=59466221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610847901.3A Pending CN106954296A (en) | 2016-09-23 | 2016-09-23 | Remove the linear LED drive circuit of stroboscopic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106954296A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110519881A (en) * | 2019-07-16 | 2019-11-29 | 深圳市稳先微电子有限公司 | LED driving circuit and control method thereof |
| CN112020176A (en) * | 2019-05-29 | 2020-12-01 | 晶豪科技股份有限公司 | Driving circuit of light emitting diode |
| CN112533326A (en) * | 2019-12-30 | 2021-03-19 | 杰华特微电子（杭州）有限公司 | Linear LED drive circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090001950A1 (en) * | 2007-06-25 | 2009-01-01 | Samsung Electronics Co., Ltd. | Flash memory and related voltage regulator |
| CN104093252A (en) * | 2014-07-16 | 2014-10-08 | 浙江大学 | Non-strobe non-isolated LED constant-current driving circuit |
| CN104780684A (en) * | 2015-04-20 | 2015-07-15 | 成都岷创科技有限公司 | DC conversion LED drive circuit |
| CN206077769U (en) * | 2016-09-23 | 2017-04-05 | 上海占空比电子科技有限公司 | It is new to remove the linear LED drive circuit of stroboscopic |
-
2016
- 2016-09-23 CN CN201610847901.3A patent/CN106954296A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090001950A1 (en) * | 2007-06-25 | 2009-01-01 | Samsung Electronics Co., Ltd. | Flash memory and related voltage regulator |
| CN104093252A (en) * | 2014-07-16 | 2014-10-08 | 浙江大学 | Non-strobe non-isolated LED constant-current driving circuit |
| CN104780684A (en) * | 2015-04-20 | 2015-07-15 | 成都岷创科技有限公司 | DC conversion LED drive circuit |
| CN206077769U (en) * | 2016-09-23 | 2017-04-05 | 上海占空比电子科技有限公司 | It is new to remove the linear LED drive circuit of stroboscopic |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112020176A (en) * | 2019-05-29 | 2020-12-01 | 晶豪科技股份有限公司 | Driving circuit of light emitting diode |
| CN110519881A (en) * | 2019-07-16 | 2019-11-29 | 深圳市稳先微电子有限公司 | LED driving circuit and control method thereof |
| CN112533326A (en) * | 2019-12-30 | 2021-03-19 | 杰华特微电子（杭州）有限公司 | Linear LED drive circuit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170714 |
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| RJ01 | Rejection of invention patent application after publication |