CN205946265U - Linear constant -current drive circuit of full voltage LED - Google Patents
Linear constant -current drive circuit of full voltage LED Download PDFInfo
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- CN205946265U CN205946265U CN201620888783.6U CN201620888783U CN205946265U CN 205946265 U CN205946265 U CN 205946265U CN 201620888783 U CN201620888783 U CN 201620888783U CN 205946265 U CN205946265 U CN 205946265U
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model provides a linear constant -current drive circuit of full voltage LED, include: diode, a LED, the 2nd LED, cluster and converting circuit, first constant current control circuit, second constant current control circuit and third constant current control circuit, a LED's positive pole and second constant current control circuit are connected, and a LED's the negative pole and the positive pole of first constant current control circuit and diode are connected, and the negative pole of diode is connected with the 2nd LED's positive pole and second constant current control circuit, and the 2nd LED's negative pole and third constant current control circuit are connected, converting circuit is connected third constant current control circuit with going here and there, and cluster and converting circuit are connected with first constant current control circuit, and a LED holds for the power input with second constant current control circuit's tie point. The utility model discloses a linear constant -current drive circuit of full voltage LED, a LED and the 2nd LED parallel operation when the low -voltage, a LED and the 2nd LED series operation when the high voltage, realized the circuit in LED just carry out the serial -parallel conversion according to operating voltage.
Description
Technical field
This utility model is related to electronic technology field, more particularly, it relates to a kind of full voltage LED linear constant-current driving is electric
Road.
Background technology
In recent years, LED substitutes conventional incandescent etc. and is widely used as mains lighting supply, and LED drives common dividing
Drive and Linear Driving for traditional Switching Power Supply, its linear drives is more next with its simple system structure and cheap cost
More popularize.
Common linear constant current driving circuit structure is as shown in figure 1, it is exactly cannot that this linear drive circuit has one disadvantage in that
Realize Width funtion application, the quantity of output loading LED determines input voltage and can only change in the range of a very little, when defeated
When entering voltage less than running voltage, LED cannot light；When input voltage is higher than running voltage, driving power consumption increases, in temperature
Rise, affect reliability.
Utility model content
The utility model proposes a kind of full voltage LED linear constant-current drive circuit, LED can be made under different running voltages
Realize serioparallel exchange.
For this reason, the utility model proposes technical scheme below：
A kind of full voltage LED linear constant-current drive circuit, including：Diode, a LED, the 2nd LED, serioparallel exchange electricity
Road, the first constant-current control circuit, the second constant-current control circuit and the 3rd constant-current control circuit；
The anode of the first LED is connected with the second constant-current control circuit, the negative electrode of a LED and the first constant-current control circuit with
And the anode of diode connects, the negative electrode of diode is connected with the anode of the 2nd LED and the second constant-current control circuit, second
The negative electrode of LED is connected with the 3rd constant-current control circuit；3rd constant-current control circuit is connected with serial-parallel conversion circuit, serioparallel exchange electricity
Road is connected with the first constant-current control circuit, and the junction point of a LED and the second constant-current control circuit is power input；
When input voltage is less than first voltage threshold value and is more than second voltage threshold value, diode turns off, serial-parallel conversion circuit
A LED and the 2nd LED is controlled to be connected in parallel, the first constant-current control circuit drives the first LED operation, the second constant-current control circuit
Drive the second LED operation；When input voltage is more than first voltage threshold value, diode current flow, serial-parallel conversion circuit controls a LED
Connect with the second LED strip connection, the 3rd constant-current control circuit drives a LED and the second LED operation；Described first voltage threshold value is big
In described second voltage threshold value.
Wherein, described first constant-current control circuit includes the first transport and placing device U1, the first NMOS tube N1, resistance R4；First fortune
The normal phase input end putting device U1 connects reference voltage, and the inverting input of the first transport and placing device U1 connects the first end of resistance R4, electricity
Second end of resistance R4 connects the S pole of the first NMOS tube N1, and the G pole of the first NMOS tube N1 connects the outfan of the first transport and placing device U1,
The D pole of the first NMOS tube N1 connects the negative electrode of a LED and the anode of diode.
Wherein, described second constant-current control circuit includes the second transport and placing device U2 and the second NMOS tube N2；Second transport and placing device U2
Normal phase input end connect reference voltage, the inverting input of the second transport and placing device U2 connects the S pole of the second NMOS tube N2, second
The G pole of NMOS tube N2 connects the outfan of the second transport and placing device U2, and the D pole of the second NMOS tube N2 connects the anode of a LED.
Wherein, described 3rd constant-current control circuit includes the 3rd transport and placing device U3 and the 3rd NMOS tube N3；3rd transport and placing device U3
Normal phase input end connect reference voltage, the inverting input of the 3rd transport and placing device U3 connects the S pole of the 3rd NMOS tube N3, the 3rd
The G pole of NMOS tube N3 connects the outfan of the 3rd transport and placing device U3, and the D pole of the 3rd NMOS tube N3 connects the negative electrode of the 2nd LED.
Wherein, described serial-parallel conversion circuit includes PMOS P1, and the G pole of PMOS P1 connects the output of the 3rd transport and placing device U3
End, the D pole of PMOS P1 connects the inverting input of the first transport and placing device U1, and the S pole of PMOS P1 connects power supply.
Wherein, described full voltage LED linear constant-current drive circuit also includes resistance R1, resistance R2, resistance R3 and electric capacity C1,
The resistance of described resistance R2 is more than the resistance of described resistance R3；
First end connection second end of resistance R4 of resistance R1 and the S pole of the first NMOS tube N1, second end of resistance R1,
The first end ground connection of the first end of electric capacity C1 and resistance R3, second end of electric capacity C1 connects the anode of a LED, resistance R3's
Second end connects the S pole of the 3rd NMOS tube N3 and the inverting input of the 3rd transport and placing device U3, and the first end of resistance R2 connects the
The anode of two LED, second end of resistance R2 connects negative electrode, the S pole of the second NMOS tube N2 and the second transport and placing device U2 of diode
Inverting input.
Wherein, described full voltage LED linear constant-current drive circuit also includes rectification circuit, and described rectification circuit connects described
Power input and civil power.
It is less than first voltage threshold value and the situation more than second voltage threshold value in input voltage, diode turns off, the second fortune
Putting device U2 output voltage is not low level, makes the second NMOS tube N2 conducting and controls the output current of the 2nd LED, the 3rd fortune simultaneously
The voltage putting the inverting input of device U3 is less than the reference voltage that the normal phase input end of the 3rd transport and placing device U3 inputs, the 3rd transport and placing device
The outfan output high level of U3, makes the 3rd NMOS tube N3 conducting and the cut-off of PMOS P1, leads to the output of the first transport and placing device U1
End output voltage is not low level, the first NMOS tube N1 conducting and control the output current of a LED, realizes a LED and the
The parallel operation of two LED；
It is more than the situation of first voltage threshold value, diode current flow, the inverting input of the second transport and placing device U2 in input voltage
Voltage be more than the second transport and placing device U2 normal phase input end input reference voltage, the second transport and placing device U2 output low level, make the
Two NMOS tube N2 turn off, and the outfan output voltage of the 3rd transport and placing device U3 is not high level simultaneously, so that PMOS P1 is turned on and the
Three NMOS tube N3 conductings, the conducting of PMOS P1 makes the voltage of the inverting input of the first transport and placing device U1 be more than the first transport and placing device U1's
The reference voltage of normal phase input end input, leads to the first transport and placing device U1 output low level, so that the first NMOS tube is turned off, the 3rd NMOS
Pipe N3 controls the output current of a LED and the 2nd LED, realizes the tandem working of a LED and the 2nd LED.
A kind of full voltage LED linear constant-current drive circuit that this utility model provides, the first LED and second in low-voltage
LED parallel operation, in high voltage, the first LED and the second LED strip connection work are it is achieved that LED is according to running voltage height in circuit
Low carry out serioparallel exchange, the reliability of this full voltage LED linear constant-current drive circuit is leaned on.
Brief description
Fig. 1 is the circuit diagram of the LED linear constant-current drive circuit of prior art.
Fig. 2 is the structural representation of the full voltage LED linear constant-current drive circuit that this utility model provides.
Fig. 3 is the circuit diagram of the full voltage LED linear constant-current drive circuit that this utility model provides.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explain this
Utility model, is not used to limit this utility model.
As shown in Fig. 2 a kind of full voltage LED linear constant-current drive circuit, including：First LED101, diode 102,
Two LED103, serial-parallel conversion circuit 107, the first constant-current control circuit 104, the second constant-current control circuit 105 and the 3rd constant current control
Circuit 106 processed.
The anode of the first LED101 is connected with the second constant-current control circuit 105, the negative electrode of a LED101 and the first constant current
The anode of control circuit 104 and diode 102 connects, the anode and second of the negative electrode of diode 102 and the 2nd LED103
Constant-current control circuit 105 connects, and the negative electrode of the 2nd LED103 is connected with the 3rd constant-current control circuit 106；3rd current constant control electricity
Road 106 is connected with serial-parallel conversion circuit 107, and serial-parallel conversion circuit 107 is connected with the first constant-current control circuit 104, and first
The junction point of LED101 and the second constant-current control circuit 105 is power input.
When input voltage is less than first voltage threshold value and is more than second voltage threshold value, diode 102 turns off, serioparallel exchange electricity
Road 107 controls a LED101 and the 2nd LED103 to be connected in parallel, and the first constant-current control circuit 104 drives a LED101 work
Make, the second constant-current control circuit 105 drives the 2nd LED103 work；When input voltage is more than first voltage threshold value, diode 102
Conducting, serial-parallel conversion circuit 107 controls a LED101 and the 2nd LED103 to be connected in series, and the 3rd constant-current control circuit 106 drives
A dynamic LED101 and the 2nd LED103 work；Described first voltage threshold value is more than described second voltage threshold value.
In the present embodiment, first voltage threshold value is the forward conduction voltage sum of a LED101 and the 2nd LED103, the
Two voltage thresholds are the higher value in the forward conduction voltage of a LED101 and the forward conduction voltage of the 2nd LED103, typically
The forward conduction voltage setting a LED101 and the 2nd LED103 is equal, and a LED101 and the 2nd LED103 can be all：Many
The LED of individual series connection or multiple LED in parallel.
When the input voltage of this full voltage LED linear constant-current drive circuit is more than second voltage threshold value and is less than first voltage
During threshold value, a LED101 and the 2nd LED103 is in parallel, and the first constant-current control circuit 104 controls the output electricity of a LED101
Stream, the second constant-current control circuit 105 controls the output current of the 2nd LED103.
Fig. 3 be the present embodiment full voltage LED linear constant-current drive circuit circuit diagram, including rectification circuit, resistance R1,
Resistance R2, resistance R3, resistance R4, electric capacity C1, the first transport and placing device U1, the second transport and placing device U2, the 3rd transport and placing device U3, the first NMOS tube
N1, the second NMOS tube N2, the 3rd NMOS tube N3, PMOS P1, LED1, LED2 and D1 (diode).Wherein, the resistance of resistance R2
Resistance more than described resistance R3.
First transport and placing device U1, the first NMOS tube N1 and resistance R4 constitute the first constant-current control circuit 104, the second transport and placing device U2
Constitute the second constant-current control circuit 105 with the second NMOS tube N2, the 3rd transport and placing device U3 and the 3rd NMOS tube N3 constitute the 3rd constant current
Control circuit 106, PMOS P1 is serial-parallel conversion circuit 107.The normal phase input end of the first transport and placing device U1 connects reference voltage, the
The inverting input of one transport and placing device U1 connects the first end of resistance R4, and second end of resistance R4 connects the S pole of the first NMOS tube N1,
The G pole of the first NMOS tube N1 connects the outfan of the first transport and placing device U1, and the negative electrode of the D pole connection LED1 of the first NMOS tube N1 is (i.e.
The current output terminal of the first LED101) and D1 anode, the normal phase input end of the second transport and placing device U2 connects reference voltage, second
The inverting input of transport and placing device U2 connects the S pole of the second NMOS tube N2, and the G pole of the second NMOS tube N2 connects the second transport and placing device U2's
Outfan, the D pole of the second NMOS tube N2 connects the anode (i.e. the current input terminal of a LED101) of LED1, the 3rd transport and placing device U3
Normal phase input end connect reference voltage, the inverting input of the 3rd transport and placing device U3 connects the S pole of the 3rd NMOS tube N3, the 3rd
The G pole of NMOS tube N3 connects the outfan of the 3rd transport and placing device U3, and the D pole of the 3rd NMOS tube N3 connects the negative electrode of LED2 (i.e. second
The current output terminal of LED103), the G pole of PMOS P1 connects the outfan of the 3rd transport and placing device U3, and the D pole of PMOS P1 connects the
The inverting input of one transport and placing device U1, the S pole of PMOS P1 connects power supply, and the first end of resistance R1 connects second end of resistance R4
And first NMOS tube N1 S pole, second end, the first end of electric capacity C1 and resistance R3 of resistance R1 first end ground connection, electricity
The second end holding C1 connects the anode of LED1, and second end of resistance R3 connects S pole and the 3rd transport and placing device of the 3rd NMOS tube N3
The inverting input of U3, the first end of resistance R2 connects the anode (i.e. the current input terminal of the 2nd LED103) of LED2, resistance R2
The second end connect D1 negative electrode, the S pole of the second NMOS tube N2 and the second transport and placing device U2 inverting input, rectification circuit is even
Connect described power input and civil power.
First transport and placing device U1, the reference voltage of the second transport and placing device U2 and the 3rd transport and placing device U3 are Vref, work as input voltage
Less than first voltage threshold value and be more than second voltage threshold value, D1 turns off, and the second transport and placing device U2 output voltage is not low level, makes the
Two NMOS tube N2 conductings and output current I2 of control LED2, I2=Vref/R2, the inverting input of the 3rd transport and placing device U3 simultaneously
Voltage be less than the 3rd transport and placing device U3 normal phase input end input reference voltage, the high electricity of outfan output of the 3rd transport and placing device U3
Flat, make the 3rd NMOS tube N3 conducting and the cut-off of PMOS P1, the outfan output voltage leading to the first transport and placing device U1 is not low electricity
Flat, output current I1 of the first NMOS tube N1 conducting and control LED1, I1=Vref/R1, realizes the work in parallel of LED1 and LED2
Make.
It is more than the situation of first voltage threshold value in input voltage, D1 turns on, the electricity of the inverting input of the second transport and placing device U2
The reference voltage of the normal phase input end input more than the second transport and placing device U2 for the pressure, the second transport and placing device U2 output low level, make second
NMOS tube N2 turns off, simultaneously the outfan output voltage of the 3rd transport and placing device U3 be not high level (but be not low level yet, output electricity
Press as the medium voltage between high level and low level), so that PMOS P1 is turned on and the conducting of the 3rd NMOS tube N3, PMOS P1 is led
The voltage of the logical inverting input making the first transport and placing device U1 is more than the reference voltage of the normal phase input end input of the first transport and placing device U1,
Lead to the first transport and placing device U1 output low level, so that the first NMOS tube is turned off, the 3rd NMOS tube N3 controls the output of LED1 and LED2
Electric current I3, realizes the tandem working of LED1 and LED2；Output current I3=Vref/R3 of LED1 and LED2.
Full voltage LED linear constant-current drive circuit of the present utility model, according to the connection in series-parallel of input voltage adjust automatically LED
Connected mode, without input voltage detection circuit, circuit structure is simple, and functional reliability is high.
The above, only this utility model preferably specific embodiment, but protection domain of the present utility model is not
It is confined to this, any those familiar with the art, in the technical scope that this utility model discloses, can readily occur in
Change or replacement, all should cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should
It is defined by scope of the claims.
Claims (8)
1. a kind of full voltage LED linear constant-current drive circuit is it is characterised in that include：Diode, a LED, the 2nd LED, string
And change-over circuit, the first constant-current control circuit, the second constant-current control circuit and the 3rd constant-current control circuit；
The anode of the first LED is connected with the second constant-current control circuit, the negative electrode of a LED and the first constant-current control circuit and two
The anode of pole pipe connects, and the negative electrode of diode is connected with the anode of the 2nd LED and the second constant-current control circuit, the 2nd LED's
Negative electrode is connected with the 3rd constant-current control circuit；3rd constant-current control circuit is connected with serial-parallel conversion circuit, serial-parallel conversion circuit with
First constant-current control circuit connects, and the junction point of a LED and the second constant-current control circuit is power input；
When input voltage is less than first voltage threshold value and is more than second voltage threshold value, diode turns off, and serial-parallel conversion circuit controls
First LED and the 2nd LED is connected in parallel, and the first constant-current control circuit drives the first LED operation, and the second constant-current control circuit drives
Second LED operation；When input voltage is more than first voltage threshold value, diode current flow, serial-parallel conversion circuit controls a LED and the
Two LED strip connection connect, and the 3rd constant-current control circuit drives a LED and the second LED operation；Described first voltage threshold value is more than institute
State second voltage threshold value.
2. full voltage LED linear constant-current drive circuit as claimed in claim 1 is it is characterised in that described first current constant control
Circuit includes the first transport and placing device U1, the first NMOS tube N1, resistance R4；The normal phase input end of the first transport and placing device U1 connects benchmark electricity
Pressure, the inverting input of the first transport and placing device U1 connects the first end of resistance R4, and second end of resistance R4 connects the first NMOS tube N1
S pole, the G pole of the first NMOS tube N1 connects the outfan of the first transport and placing device U1, and the D pole of the first NMOS tube N1 connects a LED
Negative electrode and diode anode.
3. full voltage LED linear constant-current drive circuit as claimed in claim 2 is it is characterised in that described second current constant control
Circuit includes the second transport and placing device U2 and the second NMOS tube N2；The normal phase input end connection reference voltage of the second transport and placing device U2, second
The inverting input of transport and placing device U2 connects the S pole of the second NMOS tube N2, and the G pole of the second NMOS tube N2 connects the second transport and placing device U2's
Outfan, the D pole of the second NMOS tube N2 connects the anode of a LED.
4. full voltage LED linear constant-current drive circuit as claimed in claim 3 is it is characterised in that described 3rd current constant control
Circuit includes the 3rd transport and placing device U3 and the 3rd NMOS tube N3；The normal phase input end connection reference voltage of the 3rd transport and placing device U3, the 3rd
The inverting input of transport and placing device U3 connects the S pole of the 3rd NMOS tube N3, and the G pole of the 3rd NMOS tube N3 connects the 3rd transport and placing device U3's
Outfan, the D pole of the 3rd NMOS tube N3 connects the negative electrode of the 2nd LED.
5. full voltage LED linear constant-current drive circuit as claimed in claim 4 is it is characterised in that described serial-parallel conversion circuit
Including PMOS P1, the G pole of PMOS P1 connects the outfan of the 3rd transport and placing device U3, and the D pole of PMOS P1 connects the first amplifier
The inverting input of device U1, the S pole of PMOS P1 connects power supply.
6. full voltage LED linear constant-current drive circuit as claimed in claim 5 is it is characterised in that also include resistance R1, resistance
R2, resistance R3 and electric capacity C1, the resistance of described resistance R2 is more than the resistance of described resistance R3；
The first end of resistance R1 connects second end of resistance R4 and the S pole of the first NMOS tube N1, second end of resistance R1, electric capacity
The first end ground connection of the first end of C1 and resistance R3, the anode of second end connection the first LED of electric capacity C1, the second of resistance R3
End connects the S pole of the 3rd NMOS tube N3 and the inverting input of the 3rd transport and placing device U3, and the first end of resistance R2 connects the 2nd LED
Anode, second end of resistance R2 connects the anti-phase of the negative electrode of diode, the S pole of the second NMOS tube N2 and the second transport and placing device U2
Input.
7. full voltage LED linear constant-current drive circuit as claimed in claim 1 is it is characterised in that also include rectification circuit, institute
State rectification circuit and connect described power input and civil power.
8. full voltage LED linear constant-current drive circuit as claimed in claim 6 it is characterised in that：
It is less than first voltage threshold value and the situation more than second voltage threshold value in input voltage, diode turns off, the second transport and placing device
U2 output voltage is not low level, makes the second NMOS tube N2 conducting and controls the output current of the 2nd LED, the 3rd transport and placing device simultaneously
The voltage of the inverting input of U3 is less than the reference voltage of the normal phase input end input of the 3rd transport and placing device U3, the 3rd transport and placing device U3's
Outfan exports high level, makes the 3rd NMOS tube N3 conducting and the cut-off of PMOS P1, leads to the outfan of the first transport and placing device U1 defeated
Going out voltage is not low level, the output current of the first NMOS tube N1 conducting and control the first LED, realizes a LED and the 2nd LED
Parallel operation；
It is more than the situation of first voltage threshold value, diode current flow, the electricity of the inverting input of the second transport and placing device U2 in input voltage
The reference voltage of the normal phase input end input more than the second transport and placing device U2 for the pressure, the second transport and placing device U2 output low level, make second
NMOS tube N2 turns off, and the outfan output voltage of the 3rd transport and placing device U3 is not high level simultaneously, makes the conducting of PMOS P1 and the 3rd
NMOS tube N3 turns on, and the conducting of PMOS P1 makes the voltage of the inverting input of the first transport and placing device U1 just be more than the first transport and placing device U1
The reference voltage of phase input input, leads to the first transport and placing device U1 output low level, so that the first NMOS tube is turned off, the 3rd NMOS tube
N3 controls the output current of a LED and the 2nd LED, realizes the tandem working of a LED and the 2nd LED.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620888783.6U CN205946265U (en) | 2016-08-16 | 2016-08-16 | Linear constant -current drive circuit of full voltage LED |
| PCT/CN2017/070700 WO2018032722A1 (en) | 2016-08-16 | 2017-01-10 | Universal-voltage constant-current linear led drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620888783.6U CN205946265U (en) | 2016-08-16 | 2016-08-16 | Linear constant -current drive circuit of full voltage LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205946265U true CN205946265U (en) | 2017-02-08 |
Family
ID=57918692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620888783.6U Active CN205946265U (en) | 2016-08-16 | 2016-08-16 | Linear constant -current drive circuit of full voltage LED |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN205946265U (en) |
| WO (1) | WO2018032722A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107660019A (en) * | 2017-08-31 | 2018-02-02 | 开发晶照明（厦门）有限公司 | Light source and light emitting module |
| CN109511199A (en) * | 2018-12-29 | 2019-03-22 | 杰华特微电子（杭州）有限公司 | LED control circuit and control method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111932B (en) * | 2009-12-24 | 2013-10-30 | 冠捷投资有限公司 | Light-emitting diode current balance circuit |
| CN101754541B (en) * | 2010-01-27 | 2012-12-26 | 英飞特电子（杭州）股份有限公司 | DC bus voltage following control circuit suitable for multi-path parallel LEDs |
| TW201413684A (en) * | 2012-09-17 | 2014-04-01 | Luxul Technology Inc | Full voltage serial and parallel LED lamp |
| CN102905443B (en) * | 2012-10-31 | 2014-12-10 | 上海小糸车灯有限公司 | Linear constant-current and current-sharing LED drive circuit and circuit board structure thereof |
| CN103167701B (en) * | 2013-04-01 | 2015-09-16 | 黄世蔚 | LED drive device and the method for work of series parallel structure is changed with input voltage |
| CN203722892U (en) * | 2014-02-28 | 2014-07-16 | 上海路千电子科技有限公司 | Linear constant current drive circuit |
| JP6501175B2 (en) * | 2014-07-29 | 2019-04-17 | パナソニックＩｐマネジメント株式会社 | Lighting device, lighting device and lighting device |
-
2016
- 2016-08-16 CN CN201620888783.6U patent/CN205946265U/en active Active
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2017
- 2017-01-10 WO PCT/CN2017/070700 patent/WO2018032722A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107660019A (en) * | 2017-08-31 | 2018-02-02 | 开发晶照明（厦门）有限公司 | Light source and light emitting module |
| CN109511199A (en) * | 2018-12-29 | 2019-03-22 | 杰华特微电子（杭州）有限公司 | LED control circuit and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018032722A1 (en) | 2018-02-22 |
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