DESIGN SOLUTION 7129

Provide a Safe Power Path from the Car Battery to Remote Cameras

By: Nazzareno Rossetti

Abstract:

Transmission of power and data on long coaxial cable bundles in automotive requires protection from various short-circuit modes (STG, STB). Remote cameras are small and require space- and power-efficient solutions. For each challenge, we propose solutions that not only meet the stringent requirements for automotive quality and reliability, but are power-efficient and occupy a small PCB space. The MAX20039 buck-boost converter is an effective supply for power-over-coax. The MAX20087 quad power camera protector is a compact, efficient protection IC. The dual MAX20019 cascade buck converter configuration delivers high efficiency in a small space. This triplet of ADAS ICs effectively provides power and protection to the path from the car battery to the remote cameras.