For Automotive ADAS/Infotainment application, 8 rails power tree Reference Design

rohm_jp

24 Feb 2021

In recent years, the importance of advanced driver-assistance systems (ADAS) that support a

high level of Automotive Safety Integrity Level (ASIL) has increased as automobile accident

prevention measures and autonomous driving progress. Automated driving requires a vehicle's

on-board control system to replace the human driver in performing the four elements of human

driving: “Cognition” with the ears and eyes, “Prediction” and “Judgment” with the brain, and

“Operation” via the steering wheel and accelerator. For safe automated driving, accurate

sensing, timely control and fast display imaging are necessary. For the unit to achieve safety

requirements, it is also necessary to monitor the internal operating conditions and take care of

any lack of functionality because of unit failure. In order to achieve this, the number of installed

cameras and sensors to monitor any external situation are increasing and multi-functionality to

inform and display these situations are required in the infotainment system. With the addition of

electronic circuits to monitor the operating conditions in each unit, the electronic circuits are

becoming more complex and a greater amount of time is being devoted to the design of units

and systems.

We have already solved not only the characteristics of individual products but also the problems

that may occur when combining them to build a system, thus contributing significantly to the reduction

of development time for our customers.

This reference design is a power tree solution board developed for infotainment devices

such as automotive clusters and center information displays and for ECUs for ADAS application.

The power system that can support functional safety is integrated on a single board to achieve

the optimal configuration as a power tree. Excellent EMC performance that meets CISPR25 Class 5

even at all power supply rails are enabled, and reduces heat generation of each device by

distributing high-efficiency DCDCs. In addition, two supervisor ICs with self-diagnosis functions

can monitor the output of all power rails and contribute to a higher level of functional safety.

＜Please check the URL below for the product lineups explaining the major features＞

＜Download White Paper＞