CN207809285U - Automobile CAN driving circuit - Google Patents
Automobile CAN driving circuit Download PDFInfo
- Publication number
- CN207809285U CN207809285U CN201721646476.8U CN201721646476U CN207809285U CN 207809285 U CN207809285 U CN 207809285U CN 201721646476 U CN201721646476 U CN 201721646476U CN 207809285 U CN207809285 U CN 207809285U
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Abstract
The utility model provides a kind of automobile CAN driving circuit, including：Chip U59, capacitance C165, capacitance C162, chip U57, capacitance C161, resistance R190, resistance R191, resistance R192, co-mode coil U58, capacitance C163 and capacitance C164.The common-mode filter of composition be the advantage is that slacken the common mode interference for the CAN network come；It comes CAN driving circuits and information-processing circuit are completely isolated so that the high pressure combustion for the bus come is less than rear class.
Description
Technical field
The utility model is related to a kind of driving circuit, more particularly to a kind of automobile CAN driving circuit.
Background technology
Existing automobile CAN driving circuit is usually all not provided with being isolated, also not protected on EMC.
Utility model content
A kind of automobile CAN driving circuit of the offer of the utility model, discloses a kind of CAN isolation circuits, system is made to exist
It is isolation on physical electrical so that when one end, electrical system breaks down, and does not interfere with another side system；CAN is connect
Mouth increases EMC functional circuits, improves the anti-interference ability in CAN bus；Prior art problem is solved, to overcome existing skill
The defect of art.
The utility model provides a kind of automobile CAN driving circuit, including：Chip U59, capacitance C165, capacitance C162, chip
U57, capacitance C161, resistance R190, resistance R191, resistance R192, co-mode coil U58, capacitance C163 and capacitance C164；Chip
U59 and chip U57 has 8 ports；The first termination working power input terminal P5VCC of chip U59；The second of chip U59
End is reception data terminal CAN1_RX；The third end of chip U59 is transmission data end CAN1_TX；The 4th termination system of chip U59
System place of working；The 5th termination CAN bus ground CANAGND of chip U59；The 8th termination isolated power supply CANAP5V_ of chip U59
1W；A termination isolated power supply CANAP5V_1W of capacitance C165, another termination CAN bus ground CANAGND；The first of chip U57
The 6th end of chip termination U59；The second termination CAN bus ground CANAGND of chip U57；The third termination isolation of chip U57
Power supply CANAP5V_1W；A termination isolated power supply CANAP5V_1W of capacitance C162, another termination CAN bus ground CANAGND；
The 7th end of the 4th chip termination U59 of chip U57；The 5th end of a chip termination U57 of capacitance C161, another termination CAN
Bus ground CANAGND；After resistance R190 and resistance R191 connects, both ends connect the 6th end, the 7th end of chip U57 respectively；Resistance
The joint of R190 and resistance R191 connect the 5th end；The 8th end of a chip termination U57 of resistance R192, another termination CAN are total
Line ground CANAGND；The 5th end of the third chip termination U57 of co-mode coil U58, the 4th chip termination of co-mode coil U58
The 7th end of U57；The second end of co-mode coil U58 picks up a CAN interface CAN1_L, the first termination of co-mode coil U58
Vehicle CAN bus interface CAN1_H；The first end of a termination co-mode coil U58 of capacitance C163, another termination CAN bus
CANAGND；The second end of a termination co-mode coil U58 of capacitance C164, another termination CAN bus ground CANAGND.
Further, the utility model provides a kind of automobile CAN driving circuit, can also have the feature that：Chip U59
Model ADUM1021 has 8 ports, and first end is the ends VDD1, second end is the ends VOA, third end is the ends VIB, the 4th end
For the ends GND1, the 5th end be the ends GND2, the 6th end is the ends VOB, the 7th end is the ends VIA, the 8th end is the ends VDD2.
Further, the utility model provides a kind of automobile CAN driving circuit, can also have the feature that：Chip U57
Model TJA1042T has 8 ports, and first end is the ends TXD, second end is the ends GND, third end is the ends VCC, the 4th end is
The ends RXD, the 5th end are the ends SPLIT, the 6th end is the ends CANL, the 7th end is the ends CANH, the 8th end is the ends STB.
Further, the utility model provides a kind of automobile CAN driving circuit, can also have the feature that：Common mode line
First end 1 and the 4th end 4 for enclosing U58 are the both ends of a coil, second end 2 and the both ends that third end 3 is another coil；The
One end 1 and second end 2 are in the side of co-mode coil L11, and third end 3 and the 4th end 4 are in the other side of co-mode coil L11.
Further, the utility model provides a kind of automobile CAN driving circuit, can also have the feature that：Further include
TVS pipe group D26 and TVS pipe group D27；TVS pipe group D26 is made of two TVB pipes, and the anode of two TVB pipes is connected, a TVB
The cathode of pipe connects the first end of co-mode coil U58, the cathode of another VB pipe with connecing CAN bus CANAGND；TVS pipe group D27 by
Two TVB pipes are constituted, and the anode of two TVB pipes is connected, and the cathode of a TVB pipe connects the second end of co-mode coil U58, another
The cathode of a VB pipes with connecing CAN bus CANAGND.
Further, the utility model provides a kind of automobile CAN driving circuit, can also have the feature that：Further include
Magnetic bead FB30；A termination CAN bus ground CANAGND of magnetic bead FB30, another termination protecting field.
Description of the drawings
Fig. 1 is the automobile CAN driving circuit figure of the utility model.
Specific implementation mode
The utility model is further described in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, in the present embodiment, automobile CAN driving circuit, including：Chip U59, capacitance C165, capacitance C162,
Chip U57, capacitance C161, resistance R190, resistance R191, resistance R192, co-mode coil U58, capacitance C163, capacitance C164, TVS
Pipe group D26, TVS pipe group D27 and magnetic bead FB30.
Chip U59 model ADUM1021 have 8 ports, and first end is the ends VDD1, second end is the ends VOA, third end
For the ends VIB, the 4th end be the ends GND1, the 5th end is the ends GND2, the 6th end is the ends VOB, the 7th end is the ends VIA, the 8th end is
The ends VDD2.
The VDD1 termination activities power inputs P5VCC of chip U59.The ends VOA of chip U59 and the ends VIB of chip U59 are
The ports UART, the ends VOA are that the ends reception data terminal CAN1_RX, VIB are transmission data end CAN1_TX.The GND1 of chip U59 is terminated
System place of working.The GND2 termination CAN bus ground CANAGND of chip U59.The VDD2 of chip U59 terminates isolated power supply
CANAP5V_1W.A termination isolated power supply CANAP5V_1W of capacitance C165, another termination CAN buses ground CANAGND.
Chip U57 model TJA1042T have 8 ports, and first end is the ends TXD, second end is the ends GND, third end
For the ends VCC, the 4th end be the ends RXD, the 5th end is the ends SPLIT, the 6th end is the ends CANL, the 7th end is the ends CANH, the 8th end is
The ends STB.
The ends VOB of the TXD chip terminations U59 of chip U57.The GND termination CAN buses ground CANAGND of chip U57.Chip
The VCC termination isolated power supplies CANAP5V_1W of U57.A termination isolated power supply CANAP5V_1W of capacitance C162, another termination
CAN bus ground CANAGND.The ends VIA of the RXD chip terminations U59 of chip U57.
The ends SPLIT of a chip termination U57 of capacitance C161, another termination CAN bus ground CANAGND.Resistance R190 and
After resistance R191 series connection, both ends connect the ends CANL of chip U57, the ends CANH respectively；The joint of resistance R190 and resistance R191 connect
The ends SPLIT.The ends STB of a chip termination U57 of resistance R192, another termination CAN bus ground CANAGND.
The first end 1 of co-mode coil U58 and the both ends that the 4th end 4 is a coil, second end 2 and third end 3 are another
The both ends of a coil.First end 1 and second end 2 are in the side of co-mode coil L11, and third end 3 and the 4th end 4 are in co-mode coil
The other side of L11.
The third end 3 of co-mode coil U58 connects the ends SPLIT of chip U57, the 4 chip U57's of the 4th end of co-mode coil U58
The ends CANH.The second end 2 of co-mode coil U58 picks up a CAN interface CAN1_L, and the first end 1 of co-mode coil U58 picks up
CAN interface CAN1_H.
The first end 1 of a termination co-mode coil U58 of capacitance C163, another termination CAN bus ground CANAGND.Capacitance
The second end 2 of a termination co-mode coil U58 of C164, another termination CAN buses ground CANAGND.
TVS pipe group D26 is made of two TVB pipes, and the anode of two TVB pipes is connected, and the cathode of a TVB pipe connects common mode
The first end 1 of coil U58, the cathode of another VB pipe with connecing CAN bus CANAGND.TVS pipe group D27 is by two TVB pipe structures
At the anode of two TVB pipes is connected, and the cathode of a TVB pipe connects the second end 2 of co-mode coil U58, the cathode of another VB pipe
With connecing CAN buses CANAGND.
A termination CAN bus ground CANAGND of magnetic bead FB30, another termination protecting field.
A kind of automobile CAN driving circuit provided by the utility model, by CAN input sides increase co-mode coil U58 with
The common-mode filter that capacitance C163, capacitance C164 are formed is come the common mode interference of the CAN network slackened；By TVS pipe group D26,
The high pressure that TVS pipe group D27 comes come CAN network of releasing, to protect subsequent circuit；By chip U59 by CAN driving circuits and letter
Processing circuit is completely isolated comes for breath so that the high pressure combustion for the bus come is less than rear class.
Although the content of the utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as limitations of the present invention.After those skilled in the art have read the above, for
A variety of modifications and substitutions of the utility model all will be apparent.It is any without departing from the utility model in essence scope
Utility model is created, change of circuit local structure etc. the and replacement of other unsubstantialities, deformation or modification, each falls within this
Within the scope of utility model protection.
Claims (6)
1. a kind of automobile CAN driving circuit, it is characterised in that：Including, chip U59, capacitance C165, capacitance C162, chip U57,
Capacitance C161, resistance R190, resistance R191, resistance R192, co-mode coil U58, capacitance C163 and capacitance C164；Chip U59 and
Chip U57 has 8 ports；
The first termination working power input terminal P5VCC of chip U59；The second end of chip U59 is to receive data terminal CAN1_RX；
The third end of chip U59 is transmission data end CAN1_TX；The 4th terminating systems place of working of chip U59；The 5th of chip U59
With terminating CAN bus CANAGND；The 8th termination isolated power supply CANAP5V_1W of chip U59；A termination isolation of capacitance C165
Power supply CANAP5V_1W, another termination CAN bus ground CANAGND；
The 6th end of the first chip termination U59 of chip U57；The second termination CAN bus ground CANAGND of chip U57；Chip
The third termination isolated power supply CANAP5V_1W of U57；A termination isolated power supply CANAP5V_1W of capacitance C162, another termination
CAN bus ground CANAGND；The 7th end of the 4th chip termination U59 of chip U57；
The 5th end of a chip termination U57 of capacitance C161, another termination CAN bus ground CANAGND；Resistance R190 and resistance
After R191 series connection, both ends connect the 6th end, the 7th end of chip U57 respectively；The joint of resistance R190 and resistance R191 connect the 5th
End；The 8th end of a chip termination U57 of resistance R192, another termination CAN bus ground CANAGND；
The 5th end of the third chip termination U57 of co-mode coil U58, the 7th of the 4th chip termination U57 of co-mode coil U58 the
End；The second end of co-mode coil U58 picks up a CAN interface CAN1_L, and it is total that the first end of co-mode coil U58 connects vehicle CAN
Line interface CAN1_H；
The first end of a termination co-mode coil U58 of capacitance C163, another termination CAN bus ground CANAGND；The one of capacitance C164
Terminate the second end of co-mode coil U58, another termination CAN bus ground CANAGND.
2. automobile CAN driving circuit as described in claim 1, it is characterised in that：
Wherein, chip U59 models ADUM1021 has 8 ports, and first end is the ends VDD1, second end is the ends VOA, third
End is the ends VIB, the 4th end is the ends GND1, the 5th end is the ends GND2, the 6th end is the ends VOB, the 7th end is the ends VIA, the 8th end is
The ends VDD2.
3. automobile CAN driving circuit as described in claim 1, it is characterised in that：
Wherein, chip U57 models TJA1042T has 8 ports, and first end is the ends TXD, second end is the ends GND, third end
For the ends VCC, the 4th end be the ends RXD, the 5th end is the ends SPLIT, the 6th end is the ends CANL, the 7th end is the ends CANH, the 8th end is
The ends STB.
4. automobile CAN driving circuit as described in claim 1, it is characterised in that：
Wherein, the first end 1 of co-mode coil U58 and the both ends that the 4th end 4 is a coil, second end 2 and third end 3 are another
The both ends of a coil；First end 1 and second end 2 are in the side of co-mode coil L11, and third end 3 and the 4th end 4 are in co-mode coil
The other side of L11.
5. automobile CAN driving circuit as described in claim 1, it is characterised in that：
Further include TVS pipe group D26 and TVS pipe group D27；
TVS pipe group D26 is made of two TVB pipes, and the anode of two TVB pipes is connected, and the cathode of a TVB pipe connects co-mode coil
The first end of U58, the cathode of another VB pipe with connecing CAN bus CANAGND；
TVS pipe group D27 is made of two TVB pipes, and the anode of two TVB pipes is connected, and the cathode of a TVB pipe connects co-mode coil
The second end of U58, the cathode of another VB pipe with connecing CAN bus CANAGND.
6. automobile CAN driving circuit as described in claim 1, it is characterised in that：
Further include magnetic bead FB30；A termination CAN bus ground CANAGND of magnetic bead FB30, another termination protecting field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721646476.8U CN207809285U (en) | 2017-11-30 | 2017-11-30 | Automobile CAN driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721646476.8U CN207809285U (en) | 2017-11-30 | 2017-11-30 | Automobile CAN driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207809285U true CN207809285U (en) | 2018-09-04 |
Family
ID=63335224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721646476.8U Expired - Fee Related CN207809285U (en) | 2017-11-30 | 2017-11-30 | Automobile CAN driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207809285U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111294263A (en) * | 2018-12-10 | 2020-06-16 | 比亚迪股份有限公司 | CAN bus circuit |
-
2017
- 2017-11-30 CN CN201721646476.8U patent/CN207809285U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111294263A (en) * | 2018-12-10 | 2020-06-16 | 比亚迪股份有限公司 | CAN bus circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180904 Termination date: 20191130 |