CN206061207U - The automatic adjustable low-power consumption LED drive circuit of electric current - Google Patents
The automatic adjustable low-power consumption LED drive circuit of electric current Download PDFInfo
- Publication number
- CN206061207U CN206061207U CN201620767078.0U CN201620767078U CN206061207U CN 206061207 U CN206061207 U CN 206061207U CN 201620767078 U CN201620767078 U CN 201620767078U CN 206061207 U CN206061207 U CN 206061207U
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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
This utility model is related to LED street lamp technical field, and in particular to a kind of automatic adjustable low-power consumption LED drive circuit of electric current.On the premise of this utility model can change brightness is not substantially perceived by human eye; a positive thermo-sensitive resistor is used; the appropriate electric current automatically adjusted by LED of variation with temperature is enabled the circuitry to, the generation of heat is reduced, circuit has not only been protected but also has not been made down circuitry；Due to reducing the resistance of R 1～R m in circuit, therefore the power consumed on sampling resistor is the 1/7 of traditional circuit, so as to reduce further the power consumption of whole system；LED drive current can be set by outer meeting resistance R m, and the number of external LED is determined that by M, N flexibility ratio is higher, and the LED load for being connect is more, and the efficiency of this circuit is higher, can reach 100% in theory.
Description
Technical field
This utility model is related to LED street lamp technical field, and in particular to adjustable low-power consumption LED drives electricity to a kind of electric current automatically
Road.
Background technology
Roadway illumination is closely related with people's productive life, and with the quickening of Urbanization in China, LED street lamp is orienting
The advantages such as luminous, power consumption is low, drive characteristic is good, fast response time, shock resistance height, environmental protection gradually enter into people's
The visual field, become in the world most substitute conventional light source advantage energy-conserving light source of new generation.
At present, conventional LED drive circuit consumption reduction and protective measure are mainly reflected in：In terms of overheat protector module, most
Conventional technical scheme is that, when system temperature reaches maximum permissible value, overheat protector module will immediately turn off power supply or by line
Property be quickly reduced to zero, etc. system cooling after restart drive circuit again, so as to reach protection circuit and save energy purpose,
This scheme is disadvantageous in that it is unfavorable for illumination (illumination does not allow power cut-off) and overheat protector module has energy in itself
Amount consume.
Utility model content
In view of the shortcomings of the prior art, a kind of not power-off of this utility model offer and protection circuit and energy consumption is reduced
The automatic adjustable low-power consumption LED drive circuit of electric current.
This utility model is achieved through the following technical solutions：
A kind of automatic adjustable low-power consumption LED drive circuit of electric current, including constant-current circuit, current mirroring circuit, R0 and LED load
Circuit, the constant-current circuit include voltage-reference Vref, error amplifier U01, PWM comparator U02, triangular-wave generator D,
Sampling current-limiting resistance Rsen and thermo-sensitive resistor Rptc, the current mirroring circuit include sampling tube M1, power tube M2, clamper computing
Amplifier U03 and switch metal-oxide-semiconductor M3, M4, the LED drive circuit, current mirroring circuit, R0 and LED load circuit connect successively
Connect, the one end after Rsen is in parallel with Rptc is connected the negative input of the source electrode and U01 of M3 respectively, Vref is just being connected to U01
Connect to input, the outfan of U01 is connected to the positive input of U02, and D is connected to the negative input of U02, and U02's is defeated
Go out the grid that end is connected to M3, the drain electrode of M3 connects the source electrode of the positive input and M1 of U03 respectively, and the drain electrode of M1 connects respectively
The drain electrode of the grid and M2 of VCC, M1 and grid, the source electrode of M2 connect the drain electrode of M4 and the negative input of U03 respectively,
The outfan of U03 connects the grid of M4, and the source electrode of M4 connects one end of R0 and the positive input of U1～Um respectively, U1～Um's
Negative input connects one end of the source electrode and R1～Rm of M01～M0m respectively, and the outfan of U1～Um connects the grid of M01～M0m
Pole, the drain series first row～N number of LED of m column of M01～M0m connect after the N number of LED parallel connection of first row～m column
VOUT。
Further, the other end of the other end, R0～Rm after Rsen is in parallel with Rptc is grounded.
Compared with prior art, the beneficial effects of the utility model are：
1st, this utility model can substantially do not perceived by human eye brightness change on the premise of, used one it is just temperature sensitive
Resistance, enables the circuitry to the appropriate electric current automatically adjusted by LED of variation with temperature, reduces the generation of heat, both protected
Circuit is protected and has not made down circuitry；
2nd, due to reducing the resistance of R 1～R m in circuit, therefore the power consumed on sampling resistor is traditional circuit
1/7, so as to reduce further the power consumption of whole system；
3rd, LED drive current can be set by outer meeting resistance R m, and the number of external LED is determined by M, N, flexibility ratio
Comparison is high, and the LED load for being connect is more, and the efficiency of this circuit is higher, can reach 100% in theory.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Specific embodiment
A kind of electric current as shown in Figure 1 adjustable low-power consumption LED drive circuit automatically, including constant-current circuit, current mirroring circuit,
R0 and LED load circuit, the constant-current circuit include voltage-reference Vref, error amplifier U01, PWM comparator U02, three
Angle wave producer D, sampling current-limiting resistance Rsen and thermo-sensitive resistor Rptc, the current mirroring circuit include sampling tube M1, power
Pipe M2, clamper operational amplifier U03 and switch metal-oxide-semiconductor M3, M4, the LED drive circuit, current mirroring circuit, R0 and LED bear
Carry circuit to be sequentially connected, the one end after Rsen is in parallel with Rptc is connected the negative input of the source electrode and U01 of M3 respectively, Vref connects
The positive input connection of U01 is connected to, the outfan of U01 is connected to the positive input of U02, and D is connected to the negative sense input of U02
End, the outfan of U02 are connected to the grid of M3, and the drain electrode of M3 connects the source electrode of the positive input and M1 of U03, the leakage of M1 respectively
Pole connects the drain electrode of the grid and M2 of VCC, M1 and grid respectively, and the source electrode of M2 connects the drain electrode of M4 and bearing for U03 respectively
To input, the outfan of U03 connects the grid of M4, and the source electrode of M4 connects one end of R0 and the positive input of U1～Um respectively
End, the negative input of U1～Um connect one end of the source electrode and R1～Rm of M01～M0m, the outfan connection of U1～Um respectively
The grid of M01～M0m, the drain series first row～N number of LED of m column of M01～M0m, the N number of LED of first row～m column
Connect VOUT after parallel connection.
Further, the other end of the other end, R0～Rm after Rsen is in parallel with Rptc is grounded.
Specific workflow：In constant-current circuit part, when Rsen takes definite value with Rptc, Iref is also steady state value, when certain
When kind reason causes Iref to become big, the voltage Vb of b points becomes big therewith, and Jing after error amplifier U01, the voltage Va of a points diminishes, Va
With triangular-wave generator D produce triangular wave by U02 compare afterwards so that M3 PWM duty cycle it is little, i.e., ON time diminishes, from
And output current is diminished；Otherwise output current becomes big, so as to reach the purpose of constant current；In current mirroring circuit part, M1 with
M2 makes its source voltage terminal equal by amplifier U03 clamper, realizes the matched well of two pipes；In LED load circuit part, often
A string of LED loads all obtain identical sampled voltage from R0, take R0=R1=... Rm herein, when the electric current for flowing through each LED
One timing, power P is directly proportional to R0, so R0 is less, the power of consumption is also less, so that the power consumption of whole circuit becomes
It is little.
In sum, preferred embodiment only of the present utility model, not for limit this utility model enforcement
Scope, the impartial change carried out by all shapes according to described in this utility model right, construction, feature and spirit with repair
Decorations, all should be included in right of the present utility model.
Claims (2)
1. the automatic adjustable low-power consumption LED drive circuit of a kind of electric current, it is characterised in that：Including constant-current circuit, current mirroring circuit, R0
With LED load circuit, the constant-current circuit includes voltage-reference Vref, error amplifier U01, PWM comparator U02, triangle
Wave producer D, sampling current-limiting resistance Rsen and thermo-sensitive resistor Rptc, the current mirroring circuit include sampling tube M1, power tube
M2, clamper operational amplifier U03 and switch metal-oxide-semiconductor M3, M4, the LED drive circuit, current mirroring circuit, R0 and LED load
Circuit is sequentially connected, and the one end after Rsen is in parallel with Rptc is connected the negative input of the source electrode and U01 of M3, Vref connections respectively
Positive input to U01 connects, and the outfan of U01 is connected to the positive input of U02, and D is connected to the negative sense input of U02
End, the outfan of U02 are connected to the grid of M3, and the drain electrode of M3 connects the source electrode of the positive input and M1 of U03, the leakage of M1 respectively
Pole connects the drain electrode of the grid and M2 of VCC, M1 and grid respectively, and the source electrode of M2 connects the drain electrode of M4 and bearing for U03 respectively
To input, the outfan of U03 connects the grid of M4, and the source electrode of M4 connects one end of R0 and the positive input of U1～Um respectively
End, the negative input of U1～Um connect one end of the source electrode and R1～Rm of M01～M0m, the outfan connection of U1～Um respectively
The grid of M01～M0m, the drain series first row～N number of LED of m column of M01～M0m, the N number of LED of first row～m column
Connect VOUT after parallel connection.
2. the automatic adjustable low-power consumption LED drive circuit of a kind of electric current according to claim 1, it is characterised in that：Rsen with
The other end, the other end of R0～Rm after Rptc is in parallel is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620767078.0U CN206061207U (en) | 2016-07-19 | 2016-07-19 | The automatic adjustable low-power consumption LED drive circuit of electric current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620767078.0U CN206061207U (en) | 2016-07-19 | 2016-07-19 | The automatic adjustable low-power consumption LED drive circuit of electric current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206061207U true CN206061207U (en) | 2017-03-29 |
Family
ID=58376593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620767078.0U Expired - Fee Related CN206061207U (en) | 2016-07-19 | 2016-07-19 | The automatic adjustable low-power consumption LED drive circuit of electric current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206061207U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107548218A (en) * | 2017-10-19 | 2018-01-05 | 东莞市翔实信息科技有限公司 | Linear constant current electric light drive circuit, integrated circuit and control system |
| CN109765963A (en) * | 2019-01-24 | 2019-05-17 | 上海磐启微电子有限公司 | A kind of digital regulated bias current sources |
-
2016
- 2016-07-19 CN CN201620767078.0U patent/CN206061207U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107548218A (en) * | 2017-10-19 | 2018-01-05 | 东莞市翔实信息科技有限公司 | Linear constant current electric light drive circuit, integrated circuit and control system |
| CN109765963A (en) * | 2019-01-24 | 2019-05-17 | 上海磐启微电子有限公司 | A kind of digital regulated bias current sources |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xia Jibing Inventor after: Sheng Jinxia Inventor after: Zhao Xiang Inventor after: Yin Chunrong Inventor after: Zeng Changmei Inventor after: Cao Aihua Inventor after: Lu Ming Inventor before: Xia Jibing Inventor before: Sheng Jinxia Inventor before: Zhao Xiang Inventor before: Yin Chunrong Inventor before: Zeng Changmei Inventor before: Zeng Aihua Inventor before: Lu Ming |
|
| CB03 | Change of inventor or designer information | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Jiangsu city of Yangzhou Province, Shi Kefa road 225000 No. 44-17 Patentee after: JIANGSU YANGRUI ELECTRICAL ENGINEERING CO.,LTD. Address before: Jiangsu city of Yangzhou Province, Shi Kefa road 225000 No. 44-17 Patentee before: YANGZHOU YANGRUI ELECTRICAL ENGINEERING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170329 Termination date: 20210719 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |