By LEIDITECH | 09 January 2024 | 0 Comments
SBCcommunication interfaceESDprotect
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SBC（System Basis Chip） System FundamentalschipIt's a type ofintegrated circuit芯片，It is a multifunctional chip，Integrated power supply、communication、Monitoring and diagnosis、Independent chips with features such as security monitoring,Mainly used in automotive power systems、Chassis and driving assistance、Body system、In the comfort system, hybrid and electric drive systems。You can refer to the following diagram to help understand。
The system diagram is as follows：
 Power management：This section is used to manage the power supply of the system，IntegratedVoltage conversion、Power distribution、Power monitoring、Equal function，To ensure stable power supply and safe operation of the system。
communication interface：SBCMultiple communication interfaces provided，asCAN（Controller Area Network）、LIN（Local Interconnect Network）、FlexRay、Ethernetetc.，Used to connect various control units and external sensors inside the vehicle/Actuator，Implement data exchange and transmission of control commands。
Monitoring and diagnosis、Security monitoring：Integratedawakeninput、Watchdog、reset、interruptWait for and diagnose the failure output of the circuit，And some functional safety features。
1. Why chooseSBC(System Basis Chip)
WhySBCWidely applied in modern automotive electronic systems,The details are as follows。
l integrationMultiple functional modules: SBC集成Multiple functions on one chip，Reduce the size of the system and the number of components,Reduce overall costs and improve reliability。
l Simplify design and wiring: SBCCan reduce the number of external connection lines，Simplify the design and wiring of the entire system，Reduce the system'sEMI（electromagnetic interference ）Wait for the question。
l Reduce power consumption: SBCUsually using low-power design，Beneficial for reducing the power consumption of the entire automotive electronic system。
l Improve reliability: SBCIntegrated multiple functional modules on a single chip，Reduced connection lines and points，Reduced failure rate,Enhanced stability。
l Support standardized interfaces and communication protocols: SBCUsually supports various standard automotive network communication protocols，asCAN、LINetc.，Enable the system to easily communicate with other automotive subsystems。
l Provide safety and fault diagnosis functions: SBCUsually includes some safety functions and fault diagnosis functions，Can help automotive electronic systems achieve fault isolation and safety monitoring，Ensure the safety of vehicles and passengers。
2. SBC What are the types of structures available
Depending on the application scenario，SBC The internal structure will have different combinations，
For example, for those with high demand for power supply, there can be two options，San Lu，Multiple power output；
For communication interfacesCAN Multiple channels can be equipped for those with high demandCANtransceiver , But it may only have1roadLIN；
aboutLIN Having a high demand for communication，There can be multiple channels LIN transceiver，1roadCAN transceiver。
You can refer to several internal organizational charts：
 3. SBCofCAN LINinterfaceESDprotect
aboutSBC（Single Board Computer）ofCAN LINinterface，ESD（Electrostatic Discharge）Protection is very important。CANandLINBus communication is often used in applications such as vehicle electronic systems，There is a risk of electrostatic discharge in these environments。ESDThe event may cause transient voltage shocks to electronic devices，Causing equipment damage or malfunction。
To protectCAN LINInterface immunityESDImpact of，The following measures can be taken：
l increaseESDprotection circuit ：stayCAN LINAdd additional components to the interface circuitESDprotection circuit ，For example, usingTVSdiode、Transient voltage suppressors, etc。These circuits can provide strongerESDProtection capability。
l Well designed ground and power cables：A good layout of ground and power lines can reduceESDThe impact of the event on the device。Ensure that the current loop of the ground and power lines is low impedance，Can provide betterESDpath。
4. Recommended by Shanghai LeimaoCAN LIN Multiple interfacesESDProtective devicesSMS24C
SMS24C Can be used for2roadCAN interface perhaps 4road LIN interface。
l Packaging and internal circuitsas follows：
 l CAN Bus reference circuit
 l LIN Bus reference circuit
5.SMS24C Specification parameters |
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