PMICs for Automotive Camera Modules Built to Meet ISO 26262


The continuing evolution of highly developed driver-assistance devices (ADAS) indicates a lot more onboard cameras in the latest automotive layouts. At the same time, the idea of functional protection is taking on better significance as the failure of even 1 digicam can direct to a really serious accident.

For illustration, in the automotive discipline, a growing amount of corporations are marketing purposeful safety—not only among the car or truck makers (OEMs), but Tier 1 electronics devices suppliers as properly, building it an progressively critical prerequisite worldwide. ROHM Semiconductor, for its element, has slowly expanded its portfolio to include things like paperwork demanded for useful basic safety in cars, and now options a lineup of more than 1,000 appropriate part numbers.

What is ComfySIL?

In 2021, ROHM introduced the brand ComfySIL to add to the basic safety, security, and ease and comfort of buyers and programs via items that assist practical security. As part of the ComfySIL series, these ICs are “FS (Functional Safety) course of action compliant” (the maximum grade), indicating compliance with the ISO 26262 standard.

The ComfySIL model arrived about for clients included in the layout of goods that support SIL (Security Integrity Stage) in a “Comfy” (cozy) fashion. It also applies to a system’s greater protection, stability, and ease, to which ROHM can contribute as a result of its items.

ISO 26262-Compliant PMICs

This yr, ROHM announced the availability of ISO 26262- and ASIL‑B compliant PMICs, the BD868xxMUF-C (BD868C0MUF-C and BD868D0MUF-C) relatives, for automotive digicam modules, which are ever more remaining adopted in ADAS.

The PMIC BD868xxMUF-C collection is composed of primary dc-dc, twin secondary dc-dc, a secondary linear regulator for the CMOS sensor, and an impression-sensing electrical power source. This IC is optimal for camera modules, which require little boards with a small offer (the offer component quantity is VQFN20FV3535). This IC has distribute-spectrum performance, delivering reduced sound-controlled outputs.

Assembly the demanding requirements for practical basic safety lets these most recent goods to facilitate protection design in upcoming-technology cars geared up with ADAS. Also, the four energy-supply methods (three dc-dc and one LDO) essential for automotive cameras are built-in into a 3.5- × 3.5-mm offer, obtaining the industry’s smallest dimension in comparable digital camera PMICs, according to ROHM.

The PMICs arrive outfitted with an anomaly position notification mechanism, these types of as irregular voltage detection and responses, by means of I2C. This cuts down the number of factors by 3 compared to former options, ensuing in a 25% lesser mounting region and ultimately contributing to scaled-down vehicle cameras. (The higher than 25% is just an illustration more miniaturization is doable by optimizing for individual apps.)

At the same time, a extensive assortment of output-voltage and sequence-handle settings can be configured to satisfy the varying needs of CMOS image sensors from different brands, considerably simplifying growth.

In addition to the four styles (BD868A0MUF-C, BD868B0MUF-C, BD868C0MUF-C, BD868D0MUF‑C) that comply with each ISO 26262 and ASIL-B, the lineup will incorporate the non-ISO 26262-compliant BD868C1MUF-C for customers that really don’t need ASIL compliance. Furthermore, ROHM can provide the products centered on consumer set up prerequisites, these as output voltages, voltage tolerances, sequencing, and purposeful-basic safety needs.

Apps include things like rear-check out/perimeter cameras, generate recorders, driver checking methods, and many others.

Samples are out there now with mass output scheduled for August 2022. Spinoff designs (BD868A0MUF-C, BD868B0MUF-C, BD868C1MUF-C) are scheduled to be unveiled in succession as perfectly.


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