ROHM’s new PMICs for camera modules in next-gen vehicles: Compliant with the ISO 26262 functional safety standard

Provides anomaly detection notification mechanisms in the industry’s smallest form factor

ROHM recently announced the availability of ISO 26262 and ASIL-B compliant PMICs, BD868xxMUF-C (BD868C0MUF-C, BD868D0MUF-C) for automotive camera modules increasingly used in ADAS (Advanced Driver Assistance Systems).

Due to the continuous evolution of ADAS in recent years, the number of cameras on board has increased. At the same time, the introduction of the concept of functional safety is becoming increasingly important, as the failure of even one camera can lead to a serious accident, making it imperative for manufacturers of cars and vehicle components – including semiconductor suppliers – to comply with the international safety standard ISO 26262.

In 2018 ROHM successfully obtained the ISO 26262 Development Process certification from the German certification body TÜV Rheinland and in 2021 it launched the brand ‘ComfySILTM‘ to contribute to the safety, security and comfort of users and systems through products that support functional safety. As part of the ComfySILTM series, these ICs are ‘FS (Functional Safety) Process Compliant’ products (the highest quality), indicating their compliance with ISO 26262 standard.

BD868xxMUF-C Mounting area overview and comparison

By meeting the strict requirements for functional safety, these latest products can facilitate safety design in next-generation vehicles equipped with ADAS. In addition, the 4 power systems (3 DC/DC + 1 LDO) required for car cameras are integrated into a 3.5mm x 3.5mm housing, achieving the industry’s smallest size in comparable camera PMICs. They are equipped with anomaly status notification mechanism, such as abnormal voltage detection and feedback via I2C. This reduces the number of components by 3 compared to previous solutions, resulting in a 25% smaller mounting area compared to conventional solutions and contributing to smaller vehicle cameras. (The above 25% is just an example, further miniaturization is possible by optimizing for individual applications.) At the same time, a wide variety of output voltage and sequence control settings can be configured to meet the varying requirements of CMOS image sensors from different manufacturers , which greatly simplifies development.

SOURCE: ROHM

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