拆解小米SU7中控屏幕：芯片用料堪称“奢侈”

Core Viewpoint - The article discusses the Xiaomi SU7's central control screen, focusing on its chip usage and design features, highlighting both its strengths and areas for improvement [5][71]. Design and Materials - The central control screen of the Xiaomi SU7 is designed as a separate display unit, with the main processing unit hidden within the dashboard, similar to designs used by BYD [6]. - The screen has a thickness of 18mm and utilizes side-lit backlighting, comparable to Tesla and other models [6]. - The screen is manufactured by Huaxing and features a 16.1-inch 3K resolution LCD [6]. - The design incorporates a metal back cover for electromagnetic shielding, which is rare among domestic vehicles [71]. Chip Overview - The article lists several key chips used in the Xiaomi SU7's central control screen: - LP8866QRHBRQ1: A Texas Instruments automotive display LED backlight driver with six high-precision current channels, supporting a maximum current of 200mA per channel and a dimming ratio of up to 32000:1 [15][22]. - MAX96772GTM/V+: An Analog Devices 6Gbps GMSL2 EDP data transceiver chip, facilitating high-speed data transmission between the camera and display [20]. - TPS7B6833QPWPRQ1: A Texas Instruments 500mA automotive LDO with watchdog timer functionality, ensuring stable voltage output for the screen's circuits [23]. - FS32K144HFT0VLLT: An NXP high-performance automotive MCU, designed for various electronic applications within the vehicle [28]. - R7F7010233AFP: A Renesas automotive MCU, potentially controlling peripheral devices of the central control screen [33]. Functionality and Safety - The use of dual GMSL interfaces in the central control screen suggests a design aimed at enhancing functionality and safety, possibly to meet ASIL-D level safety standards [74]. - The article notes that the mainboard of the central control screen lacks encapsulation and heat sinks, which may be a point of concern for thermal management [75].