CN102025139A - Current expanding and limiting protection circuit of ecological house - Google Patents
Current expanding and limiting protection circuit of ecological house Download PDFInfo
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- CN102025139A CN102025139A CN2010105403848A CN201010540384A CN102025139A CN 102025139 A CN102025139 A CN 102025139A CN 2010105403848 A CN2010105403848 A CN 2010105403848A CN 201010540384 A CN201010540384 A CN 201010540384A CN 102025139 A CN102025139 A CN 102025139A
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Abstract
The invention relates to a current expanding and limiting protection circuit of an ecological house, which is formed by connecting a power supply voltage Vin, a master control chip U, two diodes (Q1, Q2), three capacitors (C1, C2 and C3) and an output end Vout. The current expanding and limiting protection circuit has the advantages of realizing the current expanding and limiting function of the circuit and ensuring the safety of the circuit.
Description
Technical field
The present invention relates to Circuits System, particularly a kind of expansion current-limiting protection circuit of ecological room.
Background technology
Ecological room design of Controller theory is that imitation meets human body more a good life, rest environment arise at the historic moment technology-imitation natural ecological environments such as application message electronics, the effect that can play beauty treatment, skin care, takes care of health.Be integrated into a control system with these more existing practical techniques and realize that whole system is divided three modules: air-conditioning control module, central controll block, human-computer interaction module, realize mutually by communication modes between three control modules between the information transmission.
But in the prior art, the expansion current-limiting protection circuit system in ecological room is imperfection also.
Summary of the invention
The present invention provides a kind of expansion current-limiting protection circuit of simple and effective ecological room in order to overcome the deficiency of above technology.
The present invention realizes by following measure:
The expansion current-limiting protection circuit in a kind of ecological room of the present invention is formed by connecting by an input Vin, main control chip U, two diodes (Q1, Q2), two three electric capacity (C1, C2 and C3) and an output end vo ut:
No. 1 port of main control chip U connects and draws resistance R 2, input Vin, and No. 1 port of main control chip U links to each other with the base stage of triode Q2, and the emitter of triode Q2 links to each other with the base stage of triode Q1, is connected to input Vin behind the emitter series connection R1 of triode Q2,
No. 1 port and No. 2 port cross-over connection capacitor C 1 of main control chip U, the positive pole of capacitor C 1 connects main control chip U1 port,
No. 2 ports of main control chip U connect the collector electrode of triode Q1,
Cross-over connection capacitor C 2 between No. 2 ports of main control chip U and No. 3 ports, the positive pole of capacitor C 2 connects No. 3 ports of main control chip U,
No. 2 ports and No. 3 port cross-over connection capacitor C 3 of main control chip U, No. 3 ports of main control chip U link to each other with the collector electrode of triode Q2, and link to each other with output end vo ut,
No. 2 port ground connection of main control chip U.
The invention has the beneficial effects as follows: realize the expansion current-limiting function of circuit, guarantee the fail safe of circuit.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below preferred embodiment of the present invention and conjunction with figs. describes in detail as after.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the drive circuit schematic diagram of expansion current-limiting protection circuit of the present invention.
Embodiment
The drive circuit schematic diagram of the expansion current-limiting protection circuit of present embodiment is as shown in drawings: the expansion current-limiting protection circuit in a kind of ecological room of the present invention is formed by connecting by an input Vin, main control chip U, two diodes (Q1, Q2), two three electric capacity (C1, C2 and C3) and an output end vo ut:
No. 1 port of main control chip U connects and draws resistance R 2, input Vin, and No. 1 port of main control chip U links to each other with the base stage of triode Q2, and the emitter of triode Q2 links to each other with the base stage of triode Q1, is connected to input Vin behind the emitter series connection R1 of triode Q2,
No. 1 port and No. 2 port cross-over connection capacitor C 1 of main control chip U, the positive pole of capacitor C 1 connects main control chip U1 port,
No. 2 ports of main control chip U connect the collector electrode of triode Q1,
Cross-over connection capacitor C 2 between No. 2 ports of main control chip U and No. 3 ports, the positive pole of capacitor C 2 connects No. 3 ports of main control chip U,
No. 2 ports and No. 3 port cross-over connection capacitor C 3 of main control chip U, No. 3 ports of main control chip U link to each other with the collector electrode of triode Q2, and link to each other with output end vo ut,
No. 2 port ground connection of main control chip U.
The physical circuit of expansion current-limiting protection circuit of the present invention is described below:
Input Vin input voltage is 12V, if main control chip U can be 3.3V or 5V voltage stabilizing sheet, resistance R 2 is to be used for detecting electric current whether to need to expand stream, and when the voltage of resistance R 2 during less than 0.7V, triode Q1, Q2 are in cut-off state, output does not expand stream, when the voltage of resistance R 2 during greater than 0.7V, triode Q2 begins conducting, is in the linear amplification district, the part electric current can be by triode Q2 output, the function that realizes expanding stream.When electric current arrived limiting current greatly, triode Q1 conducting provided the passage of release, realizes the purpose of output current limliting.
The foregoing description just is to allow the one of ordinary skilled in the art can understand content of the present invention and enforcement according to this for technical conceive of the present invention and characteristics being described, its objective is, can not limit protection scope of the present invention with this.The variation or the modification of every equivalence that the essence of content has been done according to the present invention all should be encompassed in protection scope of the present invention.
Claims (1)
1. the expansion current-limiting protection circuit in an ecological room is characterized in that, is formed by connecting by an input Vin, main control chip U, two diodes (Q1, Q2), two three electric capacity (C1, C2 and C3) and an output end vo ut:
No. 1 port of main control chip U connects and draws resistance R 2, input Vin, and No. 1 port of main control chip U links to each other with the base stage of triode Q2, and the emitter of triode Q2 links to each other with the base stage of triode Q1, is connected to input Vin behind the emitter series connection R1 of triode Q2,
No. 1 port and No. 2 port cross-over connection capacitor C 1 of main control chip U, the positive pole of capacitor C 1 connects main control chip U1 port,
No. 2 ports of main control chip U connect the collector electrode of triode Q1,
Cross-over connection capacitor C 2 between No. 2 ports of main control chip U and No. 3 ports, the positive pole of capacitor C 2 connects No. 3 ports of main control chip U,
No. 2 ports and No. 3 port cross-over connection capacitor C 3 of main control chip U, No. 3 ports of main control chip U link to each other with the collector electrode of triode Q2, and link to each other with output end vo ut,
No. 2 port ground connection of main control chip U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105403848A CN102025139A (en) | 2010-11-11 | 2010-11-11 | Current expanding and limiting protection circuit of ecological house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105403848A CN102025139A (en) | 2010-11-11 | 2010-11-11 | Current expanding and limiting protection circuit of ecological house |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102025139A true CN102025139A (en) | 2011-04-20 |
Family
ID=43866132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105403848A Pending CN102025139A (en) | 2010-11-11 | 2010-11-11 | Current expanding and limiting protection circuit of ecological house |
Country Status (1)
| Country | Link |
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| CN (1) | CN102025139A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944381A (en) * | 2014-03-27 | 2014-07-23 | 重庆四联光电科技有限公司 | Voltage output circuit based on PWM control |
| CN114270647A (en) * | 2019-09-05 | 2022-04-01 | 斯堪尼亚商用车有限公司 | Electronic circuit breaker for vehicle and method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659754A (en) * | 1992-08-05 | 1994-03-04 | Fujitsu General Ltd | Overcurrent limiting circuit |
| CN1086699A (en) * | 1992-10-12 | 1994-05-18 | 曲强 | Multifunction deaf electronic diagnosis and therapeutic device |
| CN201069451Y (en) * | 2007-08-16 | 2008-06-04 | 上海航天测控通信研究所 | DC power load device |
| CN201477462U (en) * | 2009-08-27 | 2010-05-19 | 青岛海信电器股份有限公司 | Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit |
| CN202014091U (en) * | 2010-11-11 | 2011-10-19 | 苏州合欣美电子科技有限公司 | Expanded flow current-limiting protection circuit for ecological house |
-
2010
- 2010-11-11 CN CN2010105403848A patent/CN102025139A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659754A (en) * | 1992-08-05 | 1994-03-04 | Fujitsu General Ltd | Overcurrent limiting circuit |
| CN1086699A (en) * | 1992-10-12 | 1994-05-18 | 曲强 | Multifunction deaf electronic diagnosis and therapeutic device |
| CN201069451Y (en) * | 2007-08-16 | 2008-06-04 | 上海航天测控通信研究所 | DC power load device |
| CN201477462U (en) * | 2009-08-27 | 2010-05-19 | 青岛海信电器股份有限公司 | Expansive flows steady voltage circuit and television with expansive flows steady voltage circuit |
| CN202014091U (en) * | 2010-11-11 | 2011-10-19 | 苏州合欣美电子科技有限公司 | Expanded flow current-limiting protection circuit for ecological house |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944381A (en) * | 2014-03-27 | 2014-07-23 | 重庆四联光电科技有限公司 | Voltage output circuit based on PWM control |
| CN114270647A (en) * | 2019-09-05 | 2022-04-01 | 斯堪尼亚商用车有限公司 | Electronic circuit breaker for vehicle and method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110420 |