一、Overview of Automotive Intelligent Cockpit System

We can first understand its internal composition and correlation through the following diagram of the automotive intelligent cockpit system drawn by Shanghai Lei Mao engineer：

As shown in the figure, with the development of the automotive industry, modern cars have far surpassed the traditional category of transportation and gradually evolved into a highly integrated intelligent mobile platform. However, with the increasing number of electronic devices in vehicles, the electromagnetic compatibility (EMC) of each system module has become a critical issue that cannot be ignored, and electrostatic and surge protection has become the core of EMC protection for in vehicle electronic devices.

As a multimedia center integrated into automobiles, the information and entertainment system provides information and entertainment functions for drivers and passengers. It is the main "refined" part of the intelligent cockpit system in automobiles, and its EMC protection is also essential.

二、Interface protection strategy for multimedia center of information entertainment system

The car media center is like the doors and windows of a house, responsible for connecting external media (such as smartphones, USB storage devices) and internal media (such as navigation systems, audio systems), allowing passengers to enjoy multimedia content inside the car. To ensure the safety of these "doors and windows", just as a house needs to be weather resistant, the automotive media center also needs to take effective measures to prevent issues such as electrostatic discharge (ESD) and surges.

Shanghai Leimao suggests protecting various interfaces (such as VBUS, USB 3.0, HDMI, SD card slot, audio interface) in the multimedia center of the information and entertainment system. The recommended part numbers are as follows:

三、EMC Protection of Central Display Screen in Information Entertainment System

The central display screen of automobiles has evolved from an early small screen with a few knobs and buttons to a primary means of providing important vehicle information to drivers and passengers. It has various interactive contents, such as navigation, cabin temperature control, and music or entertainment information, as shown in the above figure, which are usually transmitted through multiple high-speed interfaces..

Shanghai Leimao recommends electrostatic protection for interfaces such as I2C, GPIO, SPI, LVDS, etc. The following protective components are recommended:

Shanghai Leimao has sorted out the detailed wiring scheme for static electricity, surge and filtering of the above common interfaces. If necessary, please follow the official account of Shanghai Leimao or contact EMC.

Shanghai Leimao Laboratory recommends part number for automotive 12V/24V power protection that meets ISO7637-2 5A5B testing standards:

At present, Shanghai Leimao Laboratory is conducting corresponding device research and testing for surge protection of automotive electronic 48V systems. The new TVS devices LM1K58CLV and SM8S58CA have successfully passed the 2kV surge test standard for 8/20 μ s pulse waveform specified in IEC 61000-4-5 and GB/T 17626.5, with the following parameters:

Detailed wiring scheme. If necessary, please follow the official account of Shanghai Lei Mao or contact EMC.

Shanghai Leimao has a professional laboratory that can provide relevant specification testing services for automotive electronic components, and can help customers choose suitable TVS models according to their different needs.

Shanghai Leimao specializes in the research and sales of ESD, TVS，TSS，GDT，MOV，MOSFET，Zener， Inductors and other products. Lei Mao is committed to providing customers with high-quality products to protect circuits from electrostatic interference and voltage fluctuations. Lei Mao has an experienced R&D team that can provide personalized customized services according to customer needs and provide customers with the highest quality solutions.