CN105554940A - Adaptive adjustment circuit for automotive load current - Google Patents
Adaptive adjustment circuit for automotive load current Download PDFInfo
- Publication number
- CN105554940A CN105554940A CN201510995968.7A CN201510995968A CN105554940A CN 105554940 A CN105554940 A CN 105554940A CN 201510995968 A CN201510995968 A CN 201510995968A CN 105554940 A CN105554940 A CN 105554940A
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- China
- Prior art keywords
- current
- automobile
- used load
- resistance
- triode
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- 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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- 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]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an adaptive adjustment circuit for an automotive load current. Real-time collection and feedback are carried out on a current value of a load by a bleeder circuit and a microprocessor; and constant-current control on the load is achieved by a switch control circuit. Compared with an existing linear constant-current source circuit, the cost is greatly saved; and the accuracy of current control is higher.
Description
Technical field
The present invention relates to load parameter detection technique field, be specifically related to a kind of automobile-used load current Automatic adjusument circuit.
Background technology
Load refers to the components and parts of the both ends of power be connected in automobile circuit, conventional load is as this in LED illumination device can the element of consumed power, it has been widely used in daily life, adopts LED illumination to have the advantages such as low energy consumption, long service life and environmental protection.
Existing car steering room lighting lamp is also gradually by employing common bulb, change to employing light-emitting diode (LED) lamp, its control circuit generally adopts linear constant current source chip to carry out current constant control, but Linear CCS Current Control deviation and drift are comparatively large, and accuracy is not high.
Summary of the invention
The application is that the existing linear constant current source chip of solution is poor for the control effects of bearing power, and the problem that accuracy is not high, provides a kind of automobile-used load current Automatic adjusument circuit;
Technical scheme of the present invention is as follows:
A kind of automobile-used load current Automatic adjusument circuit, described Automatic adjusument circuit comprises microprocessor, current acquisition module, current control module;
The input of described current acquisition module is connected with described automobile-used load, the output of described current acquisition module is connected with the input of described microprocessor, the output of described microprocessor is connected with the signal input part of described automobile-used load current control module, the signal output part of described automobile-used load current control module is connected with described automobile-used load, and described automobile-used load is connected with external power supply respectively with described microprocessor;
Described current acquisition module is used for the current value of Real-time Collection by described automobile-used load, described microprocessor is for receiving the current value of described automobile-used load, adjustment inputs to the modulation signal of described current control module, to control by the current value of described automobile-used load as pre-set current value, described current control module is used for described modulation signal to be converted into direct current signal, realizes the Automatic adjusument of described automobile-used load current value.
Alternatively, described current acquisition module comprises bleeder circuit and the first filter circuit;
Described bleeder circuit comprises the first resistance and the second resistance that are connected in series, and described first resistance one end is connected with described automobile-used load, described second resistance one end ground connection;
Described first filter circuit comprises filter resistance and filter capacitor, described filter resistance first end is connected with the divider node of described bleeder circuit, second end of described filter resistance connects the input of described microprocessor and the first end of described filter capacitor respectively, the second end ground connection of described filter capacitor.
Alternatively, described current control module comprises triode;
The control end of described triode is connected with the output of described microprocessor, and the input of described triode is connected with described automobile-used load, and the output of described triode is connected with described bleeder circuit.
When described triode ON, the current value of described automobile-used load transfers to described microprocessor by described first resistance, filter resistance, described microprocessor outputs control signals to the control end of described triode, to change the ON time of described triode, to control by the current value of described automobile-used load as pre-set current value.
Alternatively, for avoiding the control end of triode to burn out because of overload, described current control module also comprises current-limiting resistance;
The first end of described current-limiting resistance is connected with the output of described microprocessor, and the second end of described current-limiting resistance is connected with the control end of described triode.
Preferably, described triode is unipolarity triode or unipolarity triode.
Compared with prior art, the present invention, by carrying out real-time collection to the current value of described automobile-used load and feed back, can realize the current constant control to described automobile-used load, and it is more accurate to control than Linear CCS circuital current.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of automobile-used load current Automatic adjusument circuit of the embodiment of the present invention 1;
Fig. 2 is the structural representation of a kind of automobile-used load current Automatic adjusument circuit of the embodiment of the present invention 2;
Fig. 3 is the structural representation of a kind of automobile-used load current Automatic adjusument circuit of the embodiment of the present invention 2;
Drawing reference numeral illustrates:
R1-first resistance; R2-second resistance; R3-filter resistance; R4-current-limiting resistance;
C1-filter capacitor; Q1-triode; MCU-microprocessor; VCC-external power supply;
Be described in more detail the present invention below in conjunction with the drawings and specific embodiments, protection scope of the present invention is not limited to following embodiment.
Embodiment
A kind of automobile-used load current Automatic adjusument circuit, described Automatic adjusument circuit comprises microprocessor, current acquisition module, current control module;
The input of described current acquisition module is connected with described automobile-used load, the output of described current acquisition module is connected with the input of described microprocessor, the output of described microprocessor is connected with the signal input part of described automobile-used load current control module, the signal output part of described automobile-used load current control module is connected with described automobile-used load, and described automobile-used load is connected with external power supply respectively with described microprocessor;
Embodiment 1
As shown in Figure 1, described current acquisition module comprises bleeder circuit;
Described bleeder circuit comprises the first resistance R1 and the second resistance R2 that are connected in series, and described first resistance R1 one end is connected with described automobile-used load, described second resistance R2 one end ground connection;
Described current control module comprises nmos type triode Q1;
The grid of described triode Q1 is connected with the output of described microprocessor, and the drain electrode of described triode Q1 is connected with described automobile-used load, and the source electrode of described triode Q1 is connected with described first resistance R1 one end.
Embodiment 2
As shown in Figure 2, described current acquisition module comprises bleeder circuit and the first filter circuit;
Described bleeder circuit comprises the first resistance R1 and the second resistance R2 that are connected in series, and described first resistance R1 one end is connected with described automobile-used load, described second resistance R2 one end ground connection;
Described first filter circuit comprises filter resistance R3 and filter capacitor C1, the first end of described filter resistance R3 is connected between described first resistance R1 and the second resistance R2, the i.e. divider node place of described bleeder circuit, second end of described filter resistance R3 connects the input of described microprocessor and the first end of described filter capacitor C1, the second end ground connection of described filter capacitor C1 respectively.
Described current control module comprises nmos type triode Q1;
The grid of described triode Q1 is connected with the output of described microprocessor, and the drain electrode of described triode Q1 is connected with described automobile-used load, and the source electrode of described triode Q1 is connected with described first resistance R1 one end.
Embodiment 3
As shown in Figure 3, described current acquisition module comprises bleeder circuit and the first filter circuit;
Described bleeder circuit comprises the first resistance R1 and the second resistance R2 that are connected in series, and described first resistance R1 one end is connected with described automobile-used load, described second resistance R2 one end ground connection;
Described first filter circuit comprises filter resistance R3 and filter capacitor C1, the first end of described filter resistance R3 is connected between described first resistance R1 and the second resistance R2, the i.e. divider node place of described bleeder circuit, second end of described filter resistance R3 connects the input of described microprocessor and the first end of described filter capacitor C1, the second end ground connection of described filter capacitor C1 respectively.
Described current control module comprises nmos type triode Q1;
The grid of described triode Q1 is connected with the output of described microprocessor, and the drain electrode of described triode Q1 is connected with described automobile-used load, and the source electrode of described triode Q1 is connected with described first resistance R1 one end.
Described current control module also comprises current-limiting resistance R4;
The first end of described current-limiting resistance R4 is connected with the output of described microprocessor, and the second end of described current-limiting resistance is connected with the grid of described triode Q1.
Described microprocessor can select single-chip microcomputer.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses application process and principle, be easy to make various types of improvement or distortion, and the structure be not limited only to described by the above-mentioned embodiment of the present invention, therefore previously described mode just preferably, and do not have restrictive meaning.
Claims (5)
1. an automobile-used load current Automatic adjusument circuit, is characterized in that:
Described Automatic adjusument circuit comprises microprocessor, current acquisition module, current control module;
The input of described current acquisition module is connected with automobile-used load, the output of described current acquisition module is connected with the input of described microprocessor, the output of described microprocessor is connected with the signal input part of described automobile-used load current control module, the signal output part of described automobile-used load current control module is connected with described automobile-used load, and described automobile-used load is connected with external power supply respectively with described microprocessor;
Described current acquisition module is used for the current value of Real-time Collection by described automobile-used load, described microprocessor is for receiving the current value of described automobile-used load, adjustment inputs to the modulation signal of described current control module, to control by the current value of described automobile-used load as pre-set current value, described current control module is used for described modulation signal to be converted into direct current signal, realizes the Automatic adjusument of described automobile-used load current value.
2. one according to claim 1 automobile-used load current Automatic adjusument circuit, is characterized in that:
Described current acquisition module comprises bleeder circuit and the first filter circuit;
Described bleeder circuit comprises the first resistance and the second resistance that are connected in series, and described first resistance one end is connected with described automobile-used load, described second resistance one end ground connection;
Described first filter circuit comprises filter resistance and filter capacitor, described filter resistance first end is connected with the divider node of described bleeder circuit, second end of described filter resistance connects the input of described microprocessor and the first end of described filter capacitor respectively, the second end ground connection of described filter capacitor.
3. one according to claim 1 automobile-used load current Automatic adjusument circuit, is characterized in that:
Described current control module comprises triode;
The control end of described triode is connected with the output of described microprocessor, and the input of described triode is connected with described automobile-used load, and the output of described triode is connected with described bleeder circuit.
4. one according to claim 3 automobile-used load current Automatic adjusument circuit, is characterized in that:
Described current control module also comprises current-limiting resistance;
The first end of described current-limiting resistance is connected with the output of described microprocessor, and the second end of described current-limiting resistance is connected with the control end of described triode.
5. the automobile-used load current Automatic adjusument of the one according to claim 3 or 4 circuit, is characterized in that:
Described triode is unipolarity triode or unipolarity triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510995968.7A CN105554940A (en) | 2015-12-25 | 2015-12-25 | Adaptive adjustment circuit for automotive load current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510995968.7A CN105554940A (en) | 2015-12-25 | 2015-12-25 | Adaptive adjustment circuit for automotive load current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105554940A true CN105554940A (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510995968.7A Pending CN105554940A (en) | 2015-12-25 | 2015-12-25 | Adaptive adjustment circuit for automotive load current |
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| Country | Link |
|---|---|
| CN (1) | CN105554940A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680286A (en) * | 2018-07-04 | 2018-10-19 | 杭州盘古自动化***有限公司 | One kind is for high-resolution heat flow signal measuring system under the wide warm area of high magnetic environment |
| CN109392224A (en) * | 2018-10-22 | 2019-02-26 | 广州华欣电子科技有限公司 | A kind of current control circuit and electronic equipment |
-
2015
- 2015-12-25 CN CN201510995968.7A patent/CN105554940A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680286A (en) * | 2018-07-04 | 2018-10-19 | 杭州盘古自动化***有限公司 | One kind is for high-resolution heat flow signal measuring system under the wide warm area of high magnetic environment |
| CN109392224A (en) * | 2018-10-22 | 2019-02-26 | 广州华欣电子科技有限公司 | A kind of current control circuit and electronic equipment |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160504 |
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| WD01 | Invention patent application deemed withdrawn after publication |