Automotive Camera PMIC solutions that support functional safety ASIL B

     With the advent of intelligent driving and intelligent cockpit technology, car camera has become an indispensable part of multi-sensor fusion. The recognition of external environment is enhanced through algorithm perception, and the status monitoring of drivers and passengers is enhanced to improve the level of auxiliary driving and the ride comfort of drivers and passengers. The high performance of ADAS camera is required by automotive perception system.

     In recent years, the loading rate of ADAS(Advanced Driving assistance System) is increasing rapidly, and the technology is mainly concentrated in L2~L3 level driving assistance system. To realize these functions, the number of cameras in the bike sensing system should be at least 5, mainly including the forward/circumnavigation camera, the side camera for blind spot monitoring, the rear camera for astern assistance, and the internal camera for cabin monitoring. Together, the cameras perform lane departure maintenance, adaptive cruise control, 360 panoramic images and assist driving.

     With the evolution of ADAS from L2+ to a higher level of auxiliary driving system, the types and number of cameras are gradually increasing, and the functions are gradually becoming stronger. Therefore, higher requirements are put forward for the power management chip for the on-board camera, such as small package, low power consumption, high efficiency, and having the functional safety standards that meet ISO26262.

     OmniVision is one of the world's leading developers of semiconductor solutions for advanced digital imaging, analog, touch and display technologies, and has been working on products related to automotive cameras. In addition to the image sensor, the ORX1210 is OMNIVISION's latest highly integrated PMIC for car cameras. The PMIC comes in a QFN4x4mm2 package with a 4.0V to 18V wide input voltage range and consists of a medium-voltage DCDC Buck regulator, two low-voltage DCDC Buck regulators, and a high-PSRR low-noise LDO.

     Among them, LDO is optimized for the sensitive frequency range of the camera (100K~1MHz), which can better suppress the influence of power noise on image quality. Flexible power-on timing control ensures stable operation of the system. Support frequency spreading function, improve the EMI performance of the system. High power efficiency and good heat dissipation enable the system to work normally at higher ambient temperatures. As the first camera power management chip that supports functional security ASIL B in China, it integrates richer functional security mechanisms and meets the requirements of ASIL B level.