CN107182150B - Linear constant current tube voltage dividing circuit - Google Patents
Linear constant current tube voltage dividing circuit Download PDFInfo
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- CN107182150B CN107182150B CN201710530414.9A CN201710530414A CN107182150B CN 107182150 B CN107182150 B CN 107182150B CN 201710530414 A CN201710530414 A CN 201710530414A CN 107182150 B CN107182150 B CN 107182150B
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- 238000001514 detection method Methods 0.000 claims abstract description 6
- 230000005669 field effect Effects 0.000 claims description 37
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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Abstract
The application discloses a linear constant current voltage dividing circuit, which comprises: the input end of the rectifying circuit is connected with the mains supply; the LED component comprises one or more LEDs which are connected in series, and the input end of the LED component is connected with the output end of the rectifying circuit; the S end of the constant current tube is grounded, and the Cs end of the constant current tube is connected with the S end of the constant current tube through a current detection resistor R3; the D end of the constant current tube is connected with the output end of the LED component in series through a voltage dividing circuit, and the voltage dividing circuit is used for reducing the voltage at the two ends of the constant current tube D-S. The application provides a linear constant current voltage dividing circuit, which utilizes a voltage dividing circuit to enable a constant current tube IC1 to reduce the voltage drop at two ends of D-S thereof, thereby realizing the capability of improving the power and the surge voltage resistance.
Description
Technical Field
The application belongs to the technical field of electronic drive circuit control, and particularly relates to a linear constant current voltage dividing circuit.
Background
As a high-efficiency new light source, the LED has long service life, low energy consumption, energy conservation and environmental protection, and is widely applied to illumination in various fields.
The linear constant current driving power supply has high cost performance, but has a plurality of fatal defects, and when the voltage of a power grid is increased, the constant current tube IC1 generates serious heat, so that the reliability of the linear power supply is seriously affected.
Disclosure of Invention
In order to overcome the defects of the conventional LED linear driving circuit technology, the application provides a linear constant current voltage dividing circuit.
In order to achieve the above purpose, the technical scheme of the application is as follows:
a linear constant current voltage divider circuit comprising: the input end of the rectifying circuit is connected with the mains supply; the LED component comprises one or more LEDs which are connected in series, and the input end of the LED component is connected with the output end of the rectifying circuit; the S end of the constant current tube is grounded, and the Cs end of the constant current tube is connected with the S end of the constant current tube through a current detection resistor R3; the D end of the constant current tube is connected with the output end of the LED component in series through a voltage dividing circuit, and the voltage dividing circuit is used for reducing the voltage at the two ends of the constant current tube D-S.
The application provides a linear constant current voltage dividing circuit, which utilizes the voltage dividing circuit to enable a constant current tube IC1 to reduce the voltage drop at two ends of D-S thereof, thereby realizing the capability of improving the power and the surge voltage resistance.
On the basis of the technical scheme, the following improvement can be made:
as a preferred embodiment, the voltage dividing circuit includes: a field effect transistor Q1, a resistor R1 and a resistor R2; the drain electrode of the field effect tube Q1 is connected with the output end of the LED component, the grid electrode of the field effect tube Q1 is connected with the output end of the LED component through a resistor R1, the grid electrode of the field effect tube Q1 is grounded through a resistor R2, and the source electrode of the field effect tube Q1 is connected with the end D of the constant current tube.
By adopting the preferable scheme, the field effect transistor Q1 is utilized to change the internal resistance RDS of the voltage dividing circuit, so that the voltage at two ends of the constant current tube D-S can change along with the voltage change of the grid electrode.
Preferably, the resistor R1 is a variable resistor.
By adopting the preferable scheme, the resistance value of the resistor R1 can be effectively adjusted, so that the voltages at the two ends of the constant current tube D-S can be adjusted.
Preferably, the resistor R2 is a variable resistor.
By adopting the preferable scheme, the resistance value of the resistor R2 can be effectively adjusted, so that the voltage dividing circuit is more stable.
Preferably, the field effect transistor Q1 is a VDMOS field effect transistor.
By adopting the preferable scheme, the performance is better.
As a preferred solution, when the LED assembly comprises an LED, the input end of the LED assembly is the positive end of the LED, and the output end of the LED assembly is the negative end of the LED;
when the LED assembly comprises a plurality of LEDs connected in series, the input end of the LED assembly is the positive end of the first LED, and the output end of the LED assembly is the negative end of the last LED.
By adopting the preferable scheme, the performance is stable.
As a preferable scheme, the voltage at two ends of the constant current tube D-S is the same as the voltage at two ends of the voltage dividing circuit.
By adopting the preferable scheme, the performance is stable.
As a preferred scheme, the rectifier circuit is connected with the mains supply through a multi-stage voltage reduction circuit, and the multi-stage voltage reduction circuit is used for carrying out multi-stage voltage reduction on the mains supply.
By adopting the preferable scheme, the performance is more stable.
As a preferable scheme, the rectifier circuit is connected with the mains supply through a voltage stabilizing circuit, and the voltage stabilizing circuit is used for keeping the voltage stable.
By adopting the preferable scheme, the performance is more stable.
Preferably, the rectifier circuit is connected to the LED module via a battery.
By adopting the preferable scheme, the performance is more stable, and even if the mains supply is suddenly disconnected, the power supply can not suddenly disappear, so that the stability of the circuit is ensured.
Drawings
Fig. 1 is a schematic diagram of a linear constant current voltage divider circuit according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a voltage divider circuit and a constant current tube according to an embodiment of the present application.
Fig. 3 is a second schematic diagram of a linear constant current voltage divider circuit according to an embodiment of the present application.
Fig. 4 is a second schematic diagram of a voltage divider circuit and a constant current tube according to an embodiment of the present application.
Wherein: 1 rectifying circuit, 2LED subassembly, 3 bleeder circuit.
Detailed Description
Preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.
To achieve the object of the present application, in some embodiments of a linear constant current voltage divider circuit,
as shown in fig. 1 and 2, a linear constant current voltage dividing circuit includes: a rectifying circuit 1, an LED assembly 2, a constant current tube IC1, and a voltage dividing circuit 3.
The input end of the rectifying circuit 1 is connected with the mains supply.
The LED assembly 2 comprises a plurality of LEDs connected in series, as shown in fig. 1, dx2, …, dxn, the input of the LED assembly 2 being the positive terminal of the first LED (Dx 1), the output of the LED assembly 2 being the negative terminal of the last LED (Dxn). The input end of the LED component 2 is connected with the output end of the rectifying circuit 1. It is noted that when n=1, i.e. when the LED assembly 2 comprises one LED (Dx 1), the input terminal of the LED assembly 2 is the positive terminal of the LED (Dx 1), and the output terminal of the LED assembly 2 is the negative terminal of the LED (Dx 1).
The S end of the constant current tube IC1 is grounded, the Cs end of the constant current tube IC1 is connected with the S end of the constant current tube IC1 through a current detection resistor R3, and the current detection resistor R3 sets the constant current; the D end of the constant current tube IC1 is connected with the output end of the LED component 2 in series through a voltage dividing circuit 3, and the voltage dividing circuit 3 is used for reducing the voltage at the two ends of the constant current tube D-S.
The application provides a linear constant current voltage dividing circuit, which utilizes a voltage dividing circuit 3 to enable a constant current tube IC1 to reduce the voltage drop at two ends of D-S thereof, thereby realizing the capability of improving the power and the surge voltage resistance.
In order to further optimize the implementation effect of the present application, in other embodiments, the remaining feature techniques are the same, except that the voltage dividing circuit 3 includes: a field effect transistor Q1, a resistor R1 and a resistor R2; the drain electrode of the field effect tube Q1 is connected with the output end of the LED component 2, the grid electrode of the field effect tube Q1 is connected with the output end of the LED component 2 through a resistor R1, the grid electrode of the field effect tube Q1 is grounded through a resistor R2, and the source electrode of the field effect tube Q1 is connected with the end D of the constant current tube. The field effect transistor Q1 is a VDMOS field effect transistor.
The resistor R1 is a variable resistor, and the resistance value of the resistor R1 can be effectively adjusted, so that the voltage at two ends of the constant current tube D-S can be adjusted.
According to the application, by utilizing the principle that the internal Resistance (RDS) of the field effect tube Q1 is controlled by the voltage of the grid electrode (G), the resistor R1 is connected between the drain electrode (D) of the field effect tube Q1 and the grid electrode (G), the resistor R2 is connected between the grid electrode (G) of the field effect tube Q1 and the ground, and when the voltage of the drain electrode (D) changes, the voltage of the control end of the grid electrode (G) is changed through the resistor R1, so that the internal Resistance (RDS) of the field effect tube Q1 changes, and the voltage at two ends of the constant current tube D-S changes along with the voltage change of the grid electrode.
The voltage at two ends of the constant current tube D-S is the same as the voltage at two ends of the voltage dividing circuit 3, and the resistance value of the resistor R1 is adjusted to enable the voltage drop of the voltage dividing circuit 3 and the constant current tube IC1 to respectively distribute 50% of the voltage.
The application provides a linear constant-current tube voltage dividing circuit, which is formed by rectifying commercial power and then connecting an input end of an LED assembly 2, wherein a voltage dividing circuit 3 is connected with an output end of the LED assembly 2, a constant-current tube D end is connected with a source electrode of a field effect tube Q1, a constant-current tube CS end is connected with a current detection resistor R3 to play a constant current role, and a constant-current tube S end is connected with the ground.
The application has the advantages that: when the input voltage of the power grid rises, the voltage drop at the two ends of the constant current tube D-S is automatically followed and distributed by 50% of the voltage drop voltage by the field effect tube Q1, the temperature rise of the constant current tube IC1 is reduced, the capacity of the output power of the constant current tube is expanded by 2 times, a linear high-power driver can be realized, the reliability is improved compared with the linear high-power driving realized by a multi-constant current tube parallel connection method, the cost is reduced, and meanwhile, the surge voltage resistance capacity of a circuit is increased. Meanwhile, the structure of the application is simpler.
In order to further optimize the implementation of the present application, in other embodiments, the remaining feature techniques are the same, except that the resistor R2 is a variable resistor.
By adopting the preferable scheme, the resistance value of the resistor R2 can be effectively adjusted, so that the voltage dividing circuit is more stable.
In order to further optimize the implementation effect of the present application, in other embodiments, the remaining feature techniques are the same, except that the rectifying circuit 1 is connected to the mains supply through a multi-stage voltage reduction circuit, and the multi-stage voltage reduction circuit is used for performing multi-stage voltage reduction on the mains supply.
By adopting the preferable scheme, the performance is more stable.
In order to further optimize the implementation effect of the present application, in other embodiments, the other feature technologies are the same, except that a voltage stabilizing circuit is connected between the rectifying circuit and the mains supply, and the voltage stabilizing circuit is used for keeping the voltage stable.
By adopting the preferable scheme, the performance is more stable.
In order to further optimize the implementation of the application, in other embodiments the remaining feature techniques are identical, except that a battery connection is provided between the rectifying circuit 1 and the LED assembly 2.
By adopting the preferable scheme, the performance is more stable, and even if the mains supply is suddenly disconnected, the power supply can not suddenly disappear, so that the stability of the circuit is ensured.
In order to further optimize the implementation effect of the application, in other embodiments, the other characteristic technologies are the same, except that the voltage dividing circuit can be connected with the constant current tube IC1 of the internal MOS tube and the external MOS tube with any power or current.
As shown in fig. 3 and 4, in order to further optimize the implementation effect of the present application, in other embodiments, the other feature technologies are the same, except that a linear constant current tube voltage dividing circuit disclosed in the present application includes: two series connection's bleeder circuits, namely be connected in series between bleeder circuit 3 and constant current tube and divide circuit 4, divide circuit 4 to include: a field effect transistor Q2, a resistor R4 and a resistor R5; the drain electrode of the field effect tube Q2 is connected with the source electrode of the field effect tube Q1, the grid electrode of the field effect tube Q2 is connected with the source electrode of the field effect tube Q1 through a resistor R4, the grid electrode of the field effect tube Q2 is grounded through a resistor R5, and the source electrode of the field effect tube Q2 is connected with the end D of the constant current tube. The field effect transistor Q2 is a VDMOS field effect transistor.
With the adoption of the structure, the application can reduce the multi-stage voltage and is more stable.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and improvements could be made by those skilled in the art without departing from the inventive concept, which fall within the scope of the present application.
Claims (9)
1. A linear constant current voltage divider circuit comprising:
the input end of the rectifying circuit is connected with the mains supply;
the LED component comprises one or more LEDs which are connected in series, and the input end of the LED component is connected with the output end of the rectifying circuit;
the constant flow pipe is grounded at the S end, and the Cs end of the constant flow pipe is connected with the S end of the constant flow pipe through a current detection resistor R3;
the LED lamp is characterized in that the end D of the constant current tube is connected with the output end of the LED component in series through a voltage dividing circuit, and the voltage dividing circuit is used for reducing the voltage at the two ends of the constant current tube D-S; the voltage dividing circuit includes: a field effect transistor Q1, a resistor R1 and a resistor R2;
the drain electrode of the field effect tube Q1 is connected with the output end of the LED component, the grid electrode of the field effect tube Q1 is connected with the output end of the LED component through a resistor R1, the grid electrode of the field effect tube Q1 is grounded through a resistor R2, and the source electrode of the field effect tube Q1 is connected with the end D of the constant current tube.
2. The linear constant current voltage divider circuit according to claim 1, wherein the resistor R1 is a variable resistor.
3. The linear constant current voltage divider circuit according to claim 1, wherein the resistor R2 is a variable resistor.
4. A linear constant current voltage divider circuit according to any one of claims 1-3, characterized in that the field effect transistor Q1 is a VDMOS field effect transistor.
5. The linear constant current voltage divider circuit of claim 4, wherein when the LED assembly comprises an LED, the input of the LED assembly is the positive terminal of the LED and the output of the LED assembly is the negative terminal of the LED;
when the LED assembly comprises a plurality of LEDs connected in series, the input end of the LED assembly is the positive end of the first LED, and the output end of the LED assembly is the negative end of the last LED.
6. The linear constant current voltage divider circuit according to claim 4, wherein the voltage across the constant current tube D-S is the same as the voltage across the voltage divider circuit.
7. The linear constant current voltage divider circuit according to claim 6, wherein the rectifying circuit is connected to the commercial power through a multi-stage voltage-reducing circuit for multi-stage voltage-reducing the commercial power.
8. The linear constant current voltage divider circuit according to claim 6, wherein the rectifier circuit is connected to the commercial power through a voltage stabilizing circuit for stabilizing the voltage.
9. The linear constant current voltage divider circuit according to claim 6, wherein the rectifier circuit is connected to the LED assembly by a battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710530414.9A CN107182150B (en) | 2017-06-30 | 2017-06-30 | Linear constant current tube voltage dividing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710530414.9A CN107182150B (en) | 2017-06-30 | 2017-06-30 | Linear constant current tube voltage dividing circuit |
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| Publication Number | Publication Date |
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| CN107182150A CN107182150A (en) | 2017-09-19 |
| CN107182150B true CN107182150B (en) | 2023-10-24 |
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|---|---|---|---|---|
| US5384529A (en) * | 1993-02-01 | 1995-01-24 | Nec Corporation | Current limiting circuit and method of manufacturing same |
| CN101162872A (en) * | 2006-10-13 | 2008-04-16 | 鸿富锦精密工业（深圳）有限公司 | Control circuit and method recognizing power adapter |
| CN103687173A (en) * | 2012-09-17 | 2014-03-26 | 朗捷科技股份有限公司 | Universal linear LED drive circuit capable of de-flashing |
| CN105934021A (en) * | 2016-05-03 | 2016-09-07 | 电子科技大学 | Overvoltage adjusting circuit for linear constant-current driving LED |
| CN205611000U (en) * | 2016-05-09 | 2016-09-28 | 李志勇 | Light -emitting diode (LED) daylight lamp |
| CN106455203A (en) * | 2016-09-28 | 2017-02-22 | 深圳市晟碟半导体有限公司 | LED driving circuit and driving device |
| CN207251958U (en) * | 2017-06-30 | 2018-04-17 | 苏州菲达旭微电子有限公司 | A kind of linear constant current pipe bleeder circuit |
-
2017
- 2017-06-30 CN CN201710530414.9A patent/CN107182150B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384529A (en) * | 1993-02-01 | 1995-01-24 | Nec Corporation | Current limiting circuit and method of manufacturing same |
| CN101162872A (en) * | 2006-10-13 | 2008-04-16 | 鸿富锦精密工业（深圳）有限公司 | Control circuit and method recognizing power adapter |
| CN103687173A (en) * | 2012-09-17 | 2014-03-26 | 朗捷科技股份有限公司 | Universal linear LED drive circuit capable of de-flashing |
| CN105934021A (en) * | 2016-05-03 | 2016-09-07 | 电子科技大学 | Overvoltage adjusting circuit for linear constant-current driving LED |
| CN205611000U (en) * | 2016-05-09 | 2016-09-28 | 李志勇 | Light -emitting diode (LED) daylight lamp |
| CN106455203A (en) * | 2016-09-28 | 2017-02-22 | 深圳市晟碟半导体有限公司 | LED driving circuit and driving device |
| CN207251958U (en) * | 2017-06-30 | 2018-04-17 | 苏州菲达旭微电子有限公司 | A kind of linear constant current pipe bleeder circuit |
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| CN107182150A (en) | 2017-09-19 |
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Address after: 215600 4 building, H building, Zhangjiagang economic and Technological Development Zone, Jiangsu. Applicant after: SUZHOU FEIDAXU MICRO-ELECTRONICS Co.,Ltd. Address before: 215000 No. 2 Pei Yuan Road, hi tech Zone, Suzhou, Jiangsu Applicant before: SUZHOU FEIDAXU MICRO-ELECTRONICS Co.,Ltd. |
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