Tuesday, April 23, 2024

Three-Input Reference Design For Automotive ADAS

Delve into the reference design, which ensures a reliable power supply for critical ADAS components, meeting stringent automotive standards and paving the way for the future of autonomous vehicles.

Advanced Driver Assistance Systems (ADAS) are transforming automotive safety and comfort, utilizing sensors, cameras, and processors for features like adaptive cruise control and collision avoidance. The main processor, a crucial high-performance unit, analyzes data for real-time decisions, enhancing safety and driving experience. Efficient power management is essential for these systems to handle complex computations and provide accurate assistance. ADAS reduces accident risks and advances autonomous vehicle development, marking it as a pivotal innovation in the automotive industry.

The reference design, PMP23194 from Texas Instruments (TI) is tailored for automotive Advanced Driver-Assistance Systems (ADAS), ensuring reliable power supply to critical components such as cameras (8 V), Controller Area Networks (CAN) communications (5 V), and the main processor (3.3 V). It is engineered to operate seamlessly across the full automotive battery range, accommodating battery voltage surges up to 34 V and dips to 6 V due to cold cranking, ensuring consistent performance in varying conditions.

The design prioritises low noise to comply with the stringent CISPR 25 Class 5 emissions requirements, incorporating an input filter to minimize electromagnetic interference. This feature is crucial for maintaining the integrity of sensitive ADAS components and ensuring accurate data processing and communication. For ease of testing and maintenance, the board includes jumpers to individually disable each output, allowing for isolated troubleshooting or performance evaluation. Additionally, an on-board dynamic load is provided for the high-current 3.3-V output, facilitating comprehensive testing of the power supply under different load conditions.

The test report accompanying this reference design provides detailed operational data for each output, ensuring transparency and reliability. Conducted emissions scans are also included, verifying compliance with CISPR 25 Class 5 standards and demonstrating the design’s effectiveness in minimizing electromagnetic emissions. This power supply design is suitable for various automotive applications, including driver monitoring systems, drive assist Electronic Control Units (ECUs), automotive thermal cameras, and camera modules without processing. Its robust performance and compliance with automotive standards make it an ideal choice for powering ADAS components in modern vehicles.
TI has tested this reference design. It comes with a Bill of Material (BOM), schematics, test reports, PCB layout, Gerber files, etc. You can find additional data about the reference design on the company’s website. To read more about this reference design, click here.

Akanksha Gaur
Akanksha Gaur
Akanksha Sondhi Gaur is a journalist at EFY. She has a German patent and brings a robust blend of 7 years of industrial & academic prowess to the table. Passionate about electronics, she has penned numerous research papers showcasing her expertise and keen insight.

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