一、Guoxin Technology and its body control scheme

Suzhou CHIP Technology Co., LTD. (hereinafter referred to as "CHIP Technology") is a leading integrated circuit design company in China, focusing on the field of automotive electronics. Guoxin Technology has launched a number of vehicle scale MCU, widely used in body control, powertrain, chassis control and other key areas. Its main products include CCFC2010BC, CCFC2011BC, CCFC2012BC, CCFC2016BC, CCFC2017BC and other models, these MCUS meet the automotive electronics zero defect design requirements, using a dedicated process, especially suitable for body control and gateway applications. At present, Guoxin Technology's customers cover BYD, SAIC, Changan, Great Wall, Chery, Geely, Dongfeng and other Oems.

More importantly, the series of MCU of Guoxin Technology has realized localization from production and processing to packaging and testing, improving the autonomous and controllable ability of the supply chain, and actively responding to the strategic deployment of the country to promote independent innovation in the semiconductor industry; In the current complex international situation, this initiative helps to ensure the safety and stability of the domestic automotive electronics industry chain, and enhances China's competitiveness in key core technology fields.

The body control solutions of Guoxin technology include: door lock control, window control, wiper control, lighting control, etc.

These control systems in vehicles need to be highly reliable because they are exposed to external environments and are susceptible to electrostatic discharge (ESD) and surge currents, which can lead to system failure or damage to components. Therefore, the automotive chip must take effective electrostatic surge protection measures to ensure the stability and safety of the system. According to the national standards for automotive electronic testing, such as GB/T 28046 series standards (equivalent to ISO 16750) and GB/T 18655 (equivalent to ISO 7637), and most car companies have their own set of test standards, these standards specify the testing requirements of automotive electronic equipment under various environmental conditions. Including electrical transients, to ensure that the equipment can maintain stable performance in harsh environments.

Ii. Overview of the electrostatic surge protection scheme designed by Leiditech Electronics:

Leimo Electronics is committed to becoming a leading brand in the supply of electromagnetic compatibility solutions and components, focusing on providing professional electrostatic surge protection solutions for automotive electronics. By scanning the QR code in the image below to open the applet, you can view the detailed protection plan.

Car intelligent door lock system block diagram and electrostatic surge protection scheme:

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Car electric window control system block diagram and electrostatic surge protection scheme:

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Car wiper control system block diagram and electrostatic surge protection scheme:

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Car interior lighting control system block diagram and electrostatic surge protection scheme:

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Third, Thunder MAO for the above power supply and bus electrostatic surge protection strategy:

1. Automotive power supply system 12V/24V: used to meet the ISO7637-2 5A/5B test of front-mounted vehicles, and SAIC SMTC 3 800 006(V6) standard 5a2/5b2 test.

Leiditech Electronics recommends the use of high-power TVS or PTC+TVS combination solution to prevent overvoltage shock.

2. Communication interface: LeIMO Electronics adopts corresponding ESD, TSS and other devices according to different protection levels for CAN bus, LIN bus, vehicle Ethernet, etc., to ensure the reliability of data transmission.

l CAN interface electrostatic surge protection scheme

Lei-mao Electronics adopts low residual voltage TSS to effectively protect the interface, and the TSS reaction time is ns level, which can not only prevent surge, but also prevent static electricity, and ensure signal integrity. Meet IEC61000-4-2(electrostatic level 4, contact discharge 8kV, air discharge 15kV) and IEC61000-4-5 (surge 10/700μs, 8KV) standards, in line with the Beijing automobile enterprise standard BAS582-2019 for CAN bus BC contact discharge 8KV, Air discharge 25KV requirement.

l LIN Electrostatic protection solution:

LIN (Local Interconnect Network) bus A low-cost serial communication network for applications that do not require excessive network bandwidth, performance, or fault tolerance.

Leiditech Electronics has designed a single asymmetric bidirectional ESD protection device PESD1LIN for LIN bus.

In line with IEC 61000-4-2 (ESD) (±23kV air discharge, ±23kV contact discharge) standards, meet the requirements of Beijing automobile enterprise standard BAS582-2019 for LIN bus BC contact discharge 8KV, air discharge 15KV.

l On-board Ethernet protection solution

Based on the 100BASE-T1 and 1000BASE-T1 Development Technology Alliance standards, Lei Mo Electronics has designed special protection components to protect the bus from ESD and other transient damage. For example, ESD PESD2ETH100-T is placed near the RJ45 connector. When high ESD current is introduced, the current is routed to GND, protecting the back-end PCB, PHY, and other components.

四、Conclusion

The body control solution of Guoxin Technology provides a powerful intelligent management function for modern vehicles, while the static surge protection solution of Leimo Electronics builds a solid defense line for it, jointly ensuring the efficient and stable operation of the body control system, and improving the safety and comfort of driving.

In the future, Leimo Electronics will continue to follow the pace of Guoxin Technology and focus on providing advanced and reliable electrostatic surge protection solutions. By optimizing protection technologies, introducing new materials and technologies, we will ensure the stable operation of automotive electronic systems in a variety of harsh environments. Cooperate closely with Guoxin Technology, actively participate in the formulation of industry standards, promote the development of intelligent and safe automotive electronics, help China's automotive industry to achieve autonomy and control, and enhance global competitiveness.

Leiditech is committed to becoming a leading brand in the supply of electromagnetic compatibility solutions and components, supplying ESD, TVS, TSS, GDT, MOV, MOSFET, Zener, inductors and other products. Lei MAO has an experienced R & D team, can provide personalized customized services according to customer needs, to provide customers with the best quality solutions.