Core Viewpoint - The article focuses on the disassembly and analysis of the headlight driver module of the Xiaomi SU7, highlighting its advanced technology and components that differentiate it from traditional fuel vehicles [5][16]. Summary by Sections Overview of the Headlight Driver Module - The headlight driver module is described as the "brain" of the lighting system, essential for high-precision light control, dynamic lighting, communication, and energy management in automotive applications [5]. Disassembly Insights - The disassembly process of the SU7 headlight driver module was challenging due to the extensive use of adhesive between the bottom shell and the metal front cover, requiring significant effort to extract the driver board [7]. Component Analysis - The core controller is an Infineon automotive-grade MCU (CYT2B75CADQ0AZEGS) based on the Arm Cortex-M4 architecture, responsible for lighting logic operations, PWM waveform generation, fault diagnosis, and communication protocol stack execution [11]. - Two CAN bus controllers from NXP are included for communication redundancy, with one supporting CAN FD for high bandwidth lighting command transmission [11]. - The module features a linear voltage regulator from MPS (MP2019) that can handle 12V vehicle transient fluctuations and minimizes standby power consumption [12]. - An ON Semiconductor micro-stepping motor driver (NCV70517) is utilized for adaptive front lighting system (AFS) functionality, typically found in mid to high-end traditional fuel vehicles [13]. - A voltage follower from ROHM (BD42530) ensures dynamic voltage tracking for the light group, maintaining brightness control accuracy [14]. - The main LED driver system is powered by Texas Instruments chips, with a dual-channel constant voltage LED driver (TPS92682Q) and three synchronous buck LED drivers (TPS92520Q) for auxiliary lighting [14][15]. Conclusion on Component Selection - The analysis reveals that the Xiaomi SU7 headlight driver module employs a mix of high-performance international components and some local suppliers, indicating a strategy for supply chain diversification and reliability [16].

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