CN107562114A - A kind of circuit for CAN circuit power supply - Google Patents
A kind of circuit for CAN circuit power supply Download PDFInfo
- Publication number
- CN107562114A CN107562114A CN201710642405.9A CN201710642405A CN107562114A CN 107562114 A CN107562114 A CN 107562114A CN 201710642405 A CN201710642405 A CN 201710642405A CN 107562114 A CN107562114 A CN 107562114A
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- CN
- China
- Prior art keywords
- power supply
- circuit
- output
- output end
- voltage
- Prior art date
- 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.)
- Pending
Links
- 238000004891 communication Methods 0.000 claims abstract description 15
- 239000003381 stabilizer Substances 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The present invention provides a kind of circuit for CAN circuit power supply, and the circuit includes：Accessory power supply；Power supply decision circuitry, comprising input, output end, divider resistance, the input is connected with the output end by divider resistance, and the output of the input and the accessory power supply couples；Single-chip microcomputer, the output end of its one end and the power supply decision circuitry couple, and judge the voltage of the output end output of the power supply decision circuitry；CAN communication circuit, coupled with the single-chip microcomputer, the normal voltage of the output end output of the power supply decision circuitry is powered for the CAN communication circuit.The circuit structure of the present invention is simple, and cost is relatively low, when input voltage exception, remains to the voltage for the power supply of CAN communication circuit, power consumption is relatively low when output end is powered.
Description
Technical field
The present invention relates to field of signal processing, more particularly to a kind of circuit for CAN circuit power supply.
Background technology
In D/C power system, when powering for accessory power supply usually using input side, but being powered applied to CAN communication,
When inputting abnormal CAN communication can be made not work, lead to not judge input state.Reply above mentioned problem is usually using defeated at present
Going out to hold to accessory power supply power supply and double accessory power supplys power supply two schemes, the former can not apply in the power free occasion of outlet side,
Latter circuit is complicated, and cost is too high.And two kinds of applications are larger by power consumption during output power supply.
The content of the invention
In view of the shortcomings of the prior art, it is a primary object of the present invention to propose a kind of circuit for CAN circuit power supply.This
Circuit structure is simple, and cost is relatively low, when input voltage exception, remains to the voltage for the power supply of CAN communication circuit, output end power supply
When power consumption it is relatively low.
According to above-mentioned purpose, the present invention provides a kind of circuit for CAN circuit power supply, and the circuit includes：Accessory power supply；
Power supply decision circuitry, comprising input, output end, divider resistance, the input and the output end are connected by divider resistance
Connect, the output of the input and the accessory power supply couples；Single-chip microcomputer, the output end of its one end and the power supply decision circuitry
Coupling, judge the voltage of the output end output of the power supply decision circuitry；CAN communication circuit, coupled with the single-chip microcomputer, it is described
The normal voltage of the output end output for decision circuitry of powering is powered for the CAN communication circuit.
In one embodiment, the output of the accessory power supply is 13V.
In one embodiment, the circuit also includes：The voltage-stabiliser tube in parallel with the output end of the power supply decision circuitry.
In one embodiment, the circuit also includes：The filter capacitor in parallel with the voltage-stabiliser tube.
In one embodiment, the circuit also includes：Output end mu balanced circuit, including output cathode voltage, pass through voltage stabilizing
The output of chip and the accessory power supply couples；Diode, the output of positive pole and the accessory power supply couple, negative pole with it is described auxiliary
The output of power supply is helped to connect.
A kind of circuit for CAN circuit power supply provided by the invention, the output voltage of accessory power supply is judged by single-chip microcomputer
It is no normal, if then normally being powered for CAN circuit, if output voltage is abnormal, powered with output end mu balanced circuit.
Brief description of the drawings
Fig. 1 shows a kind of circuit diagram of circuit one side for CAN circuit power supply of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example is only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, it should all belong to what the present invention protected
Scope.
Fig. 1 is refer to, Fig. 1 shows a kind of circuit diagram of circuit one side for CAN circuit power supply of the present invention.
The circuit includes accessory power supply 100, and decision circuitry 200 of powering, power supply decision circuitry 200 includes input 10,
The voltage output end of 10 accessory power supplys 100 of input.
Power supply decision circuitry 200 is also coupled including output end IO with input 10 by divider resistance R2.
So, power decision circuitry 200 can the output side winding working condition of real-time sampling accessory power supply 100, to monolithic
Machine U4, which is provided, judges signal.
A single-chip microcomputer U4 pin and the output end IO of power supply decision circuitry 200 are coupled, and single-chip microcomputer U4 judges that power supply is sentenced
The voltage of the output end output of deenergizing 200, and compared with the normal voltage that CAN communication circuit needs, provide comparative result.
CAN communication circuit U 1 with by single-chip microcomputer U4 and power supply decision circuitry 200 couple, power supply decision circuitry 200 it is defeated
The normal voltage for going out end output is powered for CAN communication circuit U 1.
In one embodiment, the circuit also includes output end mu balanced circuit 300, including output cathode voltage, and output is just
Pole tension is coupled by the output of voltage stabilizing chip U2 and accessory power supply 100；Diode D1, the output of positive pole and accessory power supply 100
Coupling, negative pole are connected with the output of the accessory power supply.
So output end mu balanced circuit 300 can export such as 12V burning voltage.
In one embodiment, the output of accessory power supply is 13V.
In one embodiment, the output end with decision circuitry 200 of powering is parallel with voltage-stabiliser tube Z1, being capable of stable power-supplying judgement
The output voltage of circuit 200.
When inputting normal, output end mu balanced circuit 300 exports 12V less than accessory power supply output 13V, D1 cut-off.By auxiliary
Power supply is helped to be powered to CAN communication circuit, power supply decision circuitry 200 exports high level, and single-chip microcomputer reports input normal.
When inputting abnormal, accessory power supply 100 is stopped, and CAN communication electricity is given by D1 by output end mu balanced circuit 300
Road powers, and power supply decision circuitry 200 exports low level, and single-chip microcomputer reports input abnormal.
In addition, although the present specification is described in terms of embodiments, not each embodiment is only only comprising one
Vertical technical scheme, this narrating mode of specification only for clarity, those skilled in the art should using specification as
One entirety, the technical solutions in the various embodiments may also be suitably combined, formed it will be appreciated by those skilled in the art that its
His embodiment.
Claims (5)
1. a kind of circuit for CAN circuit power supply, it is characterised in that the circuit includes：
Accessory power supply；
Power supply decision circuitry, comprising input, output end, divider resistance, the input and the output end pass through partial pressure electricity
Resistance connection, the output of the input and the accessory power supply couple；
Single-chip microcomputer, the output end of its one end and the power supply decision circuitry couple, and judge the output end of the power supply decision circuitry
The voltage of output；
CAN communication circuit, coupled with the single-chip microcomputer, the normal voltage of the output end output of the power supply decision circuitry is described
CAN communication circuit is powered.
2. circuit as claimed in claim 1, it is characterised in that the output of the accessory power supply is 13V.
3. circuit as claimed in claim 1, it is characterised in that the circuit also includes：With the defeated of decision circuitry of powering
Go out end voltage-stabiliser tube in parallel.
4. circuit as claimed in claim 3, it is characterised in that the circuit also includes：
The filter capacitor in parallel with the voltage-stabiliser tube.
5. circuit as claimed in claim 1, it is characterised in that the circuit also includes：
Output end mu balanced circuit, including output cathode voltage, coupled by the output of voltage stabilizing chip and the accessory power supply；
Diode, the output of positive pole and the accessory power supply are coupled, and negative pole is connected with the output of the accessory power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642405.9A CN107562114A (en) | 2017-07-31 | 2017-07-31 | A kind of circuit for CAN circuit power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642405.9A CN107562114A (en) | 2017-07-31 | 2017-07-31 | A kind of circuit for CAN circuit power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107562114A true CN107562114A (en) | 2018-01-09 |
Family
ID=60974188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710642405.9A Pending CN107562114A (en) | 2017-07-31 | 2017-07-31 | A kind of circuit for CAN circuit power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107562114A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236402A (en) * | 2010-04-26 | 2011-11-09 | 鸿富锦精密工业（深圳）有限公司 | Energy saving detection circuit |
| CN202904758U (en) * | 2012-11-14 | 2013-04-24 | 湖南威远信息技术有限公司 | Power-down data protection device for fiscal cash register |
| CN202975966U (en) * | 2012-12-30 | 2013-06-05 | 深圳市显控自动化技术有限公司 | Circuit capable of preventing power up failure |
| CN104935072A (en) * | 2015-07-02 | 2015-09-23 | 华为技术有限公司 | Switch control method and apparatus for reserve power supply |
-
2017
- 2017-07-31 CN CN201710642405.9A patent/CN107562114A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236402A (en) * | 2010-04-26 | 2011-11-09 | 鸿富锦精密工业（深圳）有限公司 | Energy saving detection circuit |
| CN202904758U (en) * | 2012-11-14 | 2013-04-24 | 湖南威远信息技术有限公司 | Power-down data protection device for fiscal cash register |
| CN202975966U (en) * | 2012-12-30 | 2013-06-05 | 深圳市显控自动化技术有限公司 | Circuit capable of preventing power up failure |
| CN104935072A (en) * | 2015-07-02 | 2015-09-23 | 华为技术有限公司 | Switch control method and apparatus for reserve power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180109 |