CN114928033A - Power supply circuit for vehicle and control circuit for vehicle - Google Patents
Power supply circuit for vehicle and control circuit for vehicle Download PDFInfo
- Publication number
- CN114928033A CN114928033A CN202210700762.7A CN202210700762A CN114928033A CN 114928033 A CN114928033 A CN 114928033A CN 202210700762 A CN202210700762 A CN 202210700762A CN 114928033 A CN114928033 A CN 114928033A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- power supply
- inductor
- diode
- vehicle
- 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
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention provides a vehicle power supply circuit and a vehicle control circuit, wherein the vehicle power supply circuit is suitable for a microcontroller of an engine control unit, the microcontroller comprises a power supply port, and the vehicle power supply circuit comprises a diode, a transient voltage suppression diode, an inductor, a first capacitor and a second capacitor. One end of the diode is connected with the power line, and the other end of the diode is connected with the power port. One end of the transient voltage suppression diode is connected with the diode and the power supply port, the other end of the transient voltage suppression diode is connected with the grounding end, and the reverse turn-off voltage of the transient voltage suppression diode is 22V. One end of the inductor is connected with the transient voltage suppression diode. One end of the first capacitor is connected with the other end of the inductor and the power supply port, and the other end of the first capacitor is connected with the grounding end. One end of the second capacitor is connected with the other end of the inductor, one end of the first capacitor and the power supply port, and the other end of the second capacitor is connected with the grounding terminal.
Description
Technical Field
The invention belongs to the technical field of vehicle circuits, and particularly relates to a vehicle power supply circuit and a vehicle control circuit.
Background
With the development of automatic driving and advanced driver assistance systems (advanced driver assistance systems), various types of automotive circuits have been developed, so that the design of automotive circuits is becoming more important and has an important position. The addition of the vehicle circuit in the vehicle system indicates that the control system of the Engine Control Unit (ECU) is changed, and the communication system and the safety system of the vehicle are changed accordingly. Therefore, on the premise of considering the safety and reliability of the vehicle, a transient conducted emission test needs to be performed on the engine control unit to determine whether the engine control unit can normally operate under the pulse interference.
The reference standard for transient conducted emission testing is in accordance with ISO7637-2:2011(E), which includes simulating transients in the pulse 2a waveform caused by sudden interruption of current in a device in parallel with a Device Under Test (DUT) due to wire inductance. The waveform of the pulse 2a is a positive pulse, and belongs to pulse interference with high speed and low energy in the whole transient conduction emission test. However, when a pulse 2a waveform test is performed by a common engine control unit at present, several frames of error frames often occur in measurement data of a Local Interconnect Network (LIN) bus, so that the engine control unit cannot reach a normal working state and cannot pass a transient conduction emission test.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a power supply circuit and a control circuit for a vehicle, which can perform a waveform test of a pulse 2a transmitted by transient conduction, so that an engine control unit can operate normally under a pulse disturbance.
In order to achieve the above and other related objects, the present invention provides a power supply circuit for a vehicle, which is suitable for a microcontroller of an engine control unit, wherein the microcontroller includes a power port, and the power supply circuit for the vehicle includes a diode, a transient voltage suppression diode, an inductor, a first capacitor, and a second capacitor. One end of the diode is connected with the power line, and the other end of the diode is connected with the power port. One end of the transient voltage suppression diode is connected with the diode and the power supply port, the other end of the transient voltage suppression diode is connected with the grounding end, and the reverse turn-off voltage of the transient voltage suppression diode is 22V. One end of the inductor is connected with the transient voltage suppression diode. One end of the first capacitor is connected with the other end of the inductor and the power supply port, and the other end of the first capacitor is connected with the grounding end. One end of the second capacitor is connected with the other end of the inductor, one end of the first capacitor and the power port, and the other end of the second capacitor is connected with the grounding end.
The invention provides a vehicle control circuit which is suitable for an engine control unit. The transient voltage suppression diode of the vehicle power supply circuit is a first transient voltage suppression diode, and the inductor of the vehicle power supply circuit is a first inductor. The microcontroller also includes a signal port for connecting a signal line. One end of the second transient voltage suppression diode is connected with the signal port and the signal line, and the other end of the second transient voltage suppression diode is connected with the grounding terminal. One end of the second inductor is connected with the signal port, and the other end of the second inductor is connected with the second transient voltage suppression diode. One end of the third capacitor is connected with the second inductor and the signal port, and the other end of the third capacitor is connected with the grounding end.
In summary, the vehicle power supply circuit and the vehicle control circuit of the present invention can perform a waveform test of the transient conducted pulse 2a through the transient voltage suppressor diode, and the microcontroller of the engine control unit can operate normally under the pulse interference.
Drawings
Fig. 1 is a configuration diagram of a vehicular power supply circuit according to an embodiment of the invention.
Fig. 2 is a configuration diagram of a vehicular control circuit according to an embodiment of the invention.
Description of the symbols
1: power supply circuit for vehicle
2: control circuit for vehicle
10: diode with a high-voltage source
20. 60: transient voltage suppression diode
30. 70: inductance
40: first capacitor
50: second capacitor
80: third capacitor
GND: grounding terminal
LIN 1: signal port
M1: micro-controller
ST 1: connection port
VCC: power line
VS 1: power port
Detailed Description
The detailed features and advantages of the present invention are described in detail in the following embodiments, which are sufficient for anyone skilled in the art to understand the technical contents of the present invention and to implement the present invention, and the related objects and advantages of the present invention can be easily understood by anyone skilled in the art from the disclosure of the present specification, the claims and the drawings. The following examples further illustrate aspects of the present invention in detail, but are not intended to limit the scope of the invention in any way.
It will be understood that, although the terms "first", "second", etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section.
Furthermore, the terms "comprises" and/or "comprising" refer to the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
Please refer to fig. 1, which is a configuration diagram of a vehicular power supply circuit according to an embodiment of the invention. As shown in fig. 1, the power supply circuit 1 for a vehicle is suitable for a microcontroller M1 of an engine control unit, the microcontroller M1 includes a power port VS1, and the power supply circuit 1 for a vehicle includes a diode 10, a tvs 20, an inductor 30, a first capacitor 40, and a second capacitor 50. One end of the diode 10 is connected to the power line VCC, and the other end of the diode 10 is connected to the power port VS 1. Further, one end of the diode 10 may be an anode, and the other end of the diode 10 may be a cathode. One end of the transient voltage suppression diode 20 is connected to the diode 10 and the power port VS1, the other end of the transient voltage suppression diode 20 is connected to the ground GND, and the reverse turn-off voltage of the transient voltage suppression diode 20 is 22V. One end of the inductor 30 is connected to the transient voltage suppression diode 20. One end of the first capacitor 40 is connected to the other end of the inductor 30 and the power port VS1, and the other end of the first capacitor 40 is connected to the ground GND. One end of the second capacitor 50 is connected to the other end of the inductor 30, one end of the first capacitor 40, and the power port VS1, and the other end of the second capacitor 50 is connected to the ground GND.
In other words, the tvs 20 is connected to the diode 10 and the inductor 30, the inductor 30 is also connected to the first capacitor 40 and the second capacitor 50, the inductor 30 is located between the first capacitor 40 and the tvs 20, and the first capacitor 40 and the second capacitor 50 are connected in parallel.
For example, the type of the diode 10 may be BAS21, the type of the tvs 20 may be TPSMAJ22CA, the type of the inductor 30 may be BLM18PG221SZ1D, the capacitance of the first capacitor 40 may be 100nF, and the capacitance of the second capacitor 50 may be 4.7 μ F.
Under the waveform test of a transient conduction transmitted pulse 2a, a diode 10 is in a forward bias state, a transient voltage suppression diode 20 is in a reverse bias state, the diode 10 receives a pulse voltage from a power line VCC, the transient voltage suppression diode 20 reduces the maximum voltage value of the pulse voltage to 22V, an inductor 30, a first capacitor 40 and a second capacitor 50 filter the reduced pulse voltage, a power port VS1 of a microcontroller M1 receives the filtered pulse voltage, and the filtered pulse voltage is the maximum power supply voltage smaller than that of the microcontroller M1, so that error frames can not appear on measured data of a LIN bus during testing, and the microcontroller M1 can still normally operate under pulse interference. In particular, the tvs of TPSMAJ22CA can satisfy the requirement that the LIN bus does not generate error frames during the above test, and therefore, the tvs with the highest breakdown voltage can be used as the best choice for tvs 20.
Please refer to fig. 2, which illustrates a configuration diagram of a vehicular control circuit according to an embodiment of the present invention. As shown in fig. 2, the microcontroller M1 includes a power port VS1 and a signal port LIN1, the signal port LIN1 being used to connect signal lines. Specifically, the signal port LIN1 may be connected to the connection port ST1 connected to a signal line, wherein the connection between the signal port LIN1 and the connection port ST1 may be a LIN line, and the signal line is a LIN bus. The vehicle control circuit 2 includes a diode 10, a transient voltage suppression diode 20, an inductor 30, a first capacitor 40, a second capacitor 50, a transient voltage suppression diode 60, an inductor 70, and a third capacitor 80, wherein the configuration and function of the diode 10, the transient voltage suppression diode 20, the inductor 30, the first capacitor 40, and the second capacitor 50 are as those of the corresponding components of the embodiment shown in fig. 1, and are not described herein again. One end of the tvs 60 is connected to the signal port LIN1 and the connection port ST1, and the other end of the tvs 60 is connected to the ground GND. One end of the inductor 70 is connected to the signal port LIN1, and the other end of the inductor 70 is connected to the transient voltage suppression diode 60. One end of the third capacitor 80 is connected to the inductor 70 and the signal port LIN1, and the other end of the third capacitor 80 is connected to the ground GND.
In other words, the inductor 70 is located between the tvs 60 and the third capacitor 80, the connection port ST1, the tvs 60 and the inductor 70 are connected to each other, and the inductor 70, the third capacitor 80 and the signal port LIN1 are connected to each other.
For example, the tvs 60 may be of the type PESD1LIN, the inductor 70 may be of the type BLM18BB121SZ1D, and the third capacitor 80 may have a capacitance of 220 pF.
As mentioned above, the vehicle power supply circuit 1 shown in fig. 1 can provide a filtered pulse voltage of the microcontroller M1 smaller than the highest power supply voltage of the microcontroller M1 under the transient conduction transmitted pulse 2a waveform test. Therefore, for the vehicle control circuit 2 including the same circuit as the vehicle circuit power supply circuit 1, under the transient conduction emission pulse 2a waveform test, since the power port VS1 of the microcontroller M1 receives the pulse voltage smaller than the highest power supply voltage of the microcontroller M1, the signal port LIN1 of the microcontroller M1 can normally output the data signal without being interfered by the pulse voltage, the inductor 70 and the third capacitor 80 filter the data signal, the transient voltage suppression diode 60 reduces the highest voltage value of the filtered data signal to the voltage value of the reverse turn-off voltage of the transient voltage suppression diode 60, and the reduced data signal is transmitted through the connection port ST 1.
In summary, the vehicle power supply circuit and the vehicle control circuit of the present invention can test the waveform of the pulse 2a transmitted by the transient conduction through the transient voltage suppressor diode, so that the microcontroller of the engine control unit can operate normally under the pulse interference.
Although the present invention has been described with reference to the above embodiments, it is not intended to limit the invention. All changes and modifications that come within the spirit and scope of the invention are desired to be protected. Reference is made to the appended claims for their full scope of protection.
Claims (10)
1. A power supply circuit for a vehicle, adapted to a microcontroller of an engine control unit, the microcontroller including a power port, the power supply circuit comprising:
one end of the diode is connected with a power line, and the other end of the diode is connected with the power port;
one end of the transient voltage suppression diode is connected with the diode and the power supply port, the other end of the transient voltage suppression diode is connected with a grounding end, and a reverse turn-off voltage of the transient voltage suppression diode is 22V;
one end of the inductor is connected with the transient voltage suppression diode;
one end of the first capacitor is connected with the other end of the inductor and the power supply port, and the other end of the first capacitor is connected with the grounding end; and
and one end of the second capacitor is connected with the other end of the inductor, one end of the first capacitor and the power supply port, and the other end of the second capacitor is connected with the grounding terminal.
2. The vehicle power supply circuit of claim 1, wherein the transient voltage suppression diode is of the type TPSMAJ22 CA.
3. The vehicle supply circuit according to claim 1, wherein the first capacitor has a capacitance of 100 nF.
4. The vehicular power supply circuit according to claim 1, wherein the second capacitor has a capacitance value of 4.7 μ F.
5. The vehicular power supply circuit according to claim 1, wherein the inductor has a model number of BLM18PG221SZ 1D.
6. The vehicle power supply circuit according to claim 1, wherein the diode is of the type BAS 21.
7. A vehicular control circuit adapted to an engine control unit, the vehicular control circuit comprising:
the vehicular power supply circuit according to any one of claims 1 to 6, wherein the tvs is a first tvs, and the inductor is a first inductor;
the microcontroller also comprises a signal port which is used for connecting a signal wire;
one end of the second transient voltage suppression diode is connected with the signal port and the signal line, and the other end of the second transient voltage suppression diode is connected with the grounding end;
one end of the second inductor is connected with the signal port, and the other end of the second inductor is connected with the second transient voltage suppression diode; and
and one end of the third capacitor is connected with the second inductor and the signal port, and the other end of the third capacitor is connected with the grounding end.
8. The vehicular control circuit according to claim 7, wherein the second tvs is of the type PESD1 LIN.
9. The vehicular control circuit according to claim 7, wherein the third capacitor has a capacitance of 220 pF.
10. The vehicle control circuit of claim 7, wherein the second inductor is of a type BLM18BB121SZ 1D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210700762.7A CN114928033A (en) | 2022-06-20 | 2022-06-20 | Power supply circuit for vehicle and control circuit for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210700762.7A CN114928033A (en) | 2022-06-20 | 2022-06-20 | Power supply circuit for vehicle and control circuit for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114928033A true CN114928033A (en) | 2022-08-19 |
Family
ID=82813859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210700762.7A Pending CN114928033A (en) | 2022-06-20 | 2022-06-20 | Power supply circuit for vehicle and control circuit for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114928033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI810065B (en) * | 2022-09-14 | 2023-07-21 | 英業達股份有限公司 | Anti-static electricity protection circuit structure for network signal bus of electronic control unit |
-
2022
- 2022-06-20 CN CN202210700762.7A patent/CN114928033A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI810065B (en) * | 2022-09-14 | 2023-07-21 | 英業達股份有限公司 | Anti-static electricity protection circuit structure for network signal bus of electronic control unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI544602B (en) | Adaptive electrostatic discharge (esd) protection circuit | |
| CN101842955B (en) | Adaptive electrostatic discharge (esd) protection of device interface for local interconnect network (lin) bus and the like | |
| EP2819168A1 (en) | ESD protection circuit, semiconductor device, on-vehicle electronic device, and on-vehicle electronic system | |
| DE102012212890B4 (en) | High-side switch | |
| US3911296A (en) | Capacitance multiplier circuit | |
| WO1990009713A1 (en) | Network interface | |
| US4005342A (en) | Integrated circuit overvoltage protection circuit | |
| CN114928033A (en) | Power supply circuit for vehicle and control circuit for vehicle | |
| CN112505592A (en) | High-voltage connector fault detection circuit, detection method, controller and automobile | |
| CN101162840A (en) | Interface protective circuit | |
| CN113726626B (en) | Filter protection circuit based on CAN bus driver chip | |
| US10921384B2 (en) | Disconnection sensing circuit and electrical connection box | |
| CN112994441B (en) | Vehicle-mounted ECU power supply input circuit | |
| CN210258300U (en) | Input protection circuit of electronic equipment of vehicle and vehicle | |
| CN111245426B (en) | Isolation capacitor communication circuit and failure protection method thereof | |
| US7130175B2 (en) | Monolithic integratable circuit arrangement for protection against a transient voltage | |
| Lepkowski et al. | EMI/ESD solutions for the CAN network | |
| KR102228008B1 (en) | Apparatus for protecting low side driver and delay method of parasitic components using the same | |
| TW202400430A (en) | Power supply circuit for vehicle and control circuit for vehicle | |
| CN220292010U (en) | Communication interface circuit and power module based on pulse width modulation | |
| CN218276071U (en) | Antenna power supply circuit | |
| US9343900B2 (en) | Passive network for electrostatic protection of integrated circuits | |
| CN219659426U (en) | Overvoltage protection circuit, electronic equipment and vehicle | |
| CN111555246A (en) | Drive chip, intelligent power and air conditioner | |
| CN216816839U (en) | Vehicle-mounted EMC test circuit |
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 |