CISPR25 Class5 compliant 8-rail power tree reference design for automotive ADAS/infotainment applications

This reference design is a "power tree" solution circuit board developed for information devices such as vehicle cluster systems and central information displays, as well as ADAS ECUs. The power supply system that supports functional safety is integrated into one circuit board to achieve structural optimization of the "power tree". Even when all power supplies are working, the EMC performance can meet the CISPR25 Class5 standard, and the heat generation of each component is reduced by distributing high-efficiency DCDC. In addition, two voltage monitoring ICs with self-diagnosis functions can monitor the output of the entire system, helping to improve the level of functional safety. Features Suitable for in-vehicle infotainment system/ADAS 8-system power tree reference design No common mode filter, compliant with EMC CISPR 25 class 5 To avoid the AM broadcast band, all DC/DC converters operate at a switching frequency greater than 2.2MHz Thermal testing has been implemented Helps improve functional safety ASIL level 8-system voltage monitoring Integrate power trees for multiple systems and save space Specifications Product name REFRPT001-EVK-001 Input voltage 9.0V ~ 16.0V Output system 8 systems Output voltage 5.0V x2/3.3V x2/1.8V/1.5V/1.25V/1.0V EMC performance compliant with CISPR 25 Class 5 Size 121.9mm x 96.5mmApplication examples◇ADAS sensors, cameras, radar◇In-vehicle infotainment systems, instrument clusters, BCM (body control modules), and other automotive applications that require compactness, high efficiency, and high reliabilityNEWS:ROHM launches the "BD9P Series" of automotive primary DC/DC converters that are resistant to battery voltage fluctuations~With both high-speed response and high efficiency, it helps to further reduce the power consumption of application products~