PMIC simplifies power supply design for automotive cameras

January 14, 2020 //By Christoph Hammerschmidt
PMIC simplifies power supply design for automotive cameras
With the ISL78083, Renesas introduces a PMIC designed to supply power to HD camera modules such as those used in vehicles for environment detection. The chip reduces development time and BOM and minimizes supply chain risks.

The ISL78083 is powered directly from the battery (36V to 42V) or power-over-coax (15V to 18V) and supports output currents up to 750mA per output. The power stage offers sufficient capacity for existing image sensors with up to 7 megapixels and future sensors with even higher resolution.

With this PMIC, Renesas extends its support for automotive surround view and rear view camera systems beyond the image processing functions of the R-Car SoC and enables the development of compact HD cameras. According to the manufacturer, cameras equipped in this way should be easy and convenient to integrate in the vehicle.

The ISL78083 with 4-channel voltage regulator includes a primary high voltage synchronous buck converter, two secondary low voltage synchronous buck converters and an LDO voltage regulator. Thanks to the integrated feedback and compensation function, only an output inductor and capacitors are required to build a highly efficient power supply. The ISL78083 minimizes BOM costs and requires 7 to 10 fewer external components compared to competitive solutions. The ISL78083 also features four overvoltage and four undervoltage monitoring circuits, three power-good signal outputs and a reset output/fault indicator. A second reference circuit is provided for overvoltage/undervoltage monitoring.

The 4mm x 4mm SCQFN package improves solder joint reliability and allows optical inspection of solder joints for lower cost manufacturing.

The ISL78083 is now available in a 24-pin SCQFN package in high volume production.

More information: www.renesas.com/products/isl78083


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