ROHM launches smart switches optimized for zonal controllers
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ROHM has introduced a new family of smart Switches for zonal controllers designed to enhance reliability and performance in next-generation automotive systems. The six new intelligent power devices for zonal control in the BV1HBxxxEFJ series deliver low ON resistance (from 9 mΩ to 180 mΩ) and high-precision current sensing, providing robust protection for vehicle subsystems such as lighting, door locks, and power windows.
For eeNews Europe readers, this launch highlights how semiconductor innovation is addressing emerging system-level challenges in automotive design—particularly in the move toward zonal architectures and increased electrification. Engineers working on EVs or advanced control modules will find ROHM’s approach noteworthy for balancing safety, performance, and design flexibility.
Designed for zonal controller architectures
With the shift to zonal control architectures in electric and autonomous vehicles, managing a growing number of electronic loads efficiently has become critical. Traditional smart switches often struggle with high-capacitance loads, but ROHM’s new devices are engineered to handle these conditions with ease. The company claims the series delivers “key performance attributes such as low ON resistance and high inductive energy clamp while significantly improving capacitive load drive capability.”
This combination helps eliminate the need for mechanical fuses and simplifies protection schemes in complex distributed systems. ROHM says the devices’ robust diagnostic features—including open load and reverse battery detection—further enhance safety and reliability in automotive networks.
High-precision current sensing and thermal design
The BV1HBxxxEFJ devices integrate a high-accuracy current sensing function (±5%), offering effective protection for wiring harnesses and output loads. They also come in a compact HTSOP-J8 package that provides excellent heat dissipation and layout flexibility for dense automotive PCBs.
ROHM emphasizes that its proprietary process technology allows it to achieve both low ON resistance and high inductive energy tolerance, typically conflicting parameters. This balance enhances efficiency and safety while supporting the growing needs of electrified and autonomous vehicles.
ROHM plans to continue expanding its automotive portfolio, focusing on “improving safety, security, and energy efficiency” across future product generations.
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