Precision Sensing for the Next Generation of Electric Vehicles
The shift toward electric vehicles (EVs) and advanced driver-assistance systems (ADAS) has created a strong demand for more efficient and accurate current sensing technologies. Electric and hybrid vehicles now rely on higher voltage systems. Such as 48V architectures, which demand components that can deliver both performance and safety. High-accuracy current sense amplifiers are critical in monitoring power flow, preventing overcurrent, and enabling smarter energy management. As electric vehicle ecosystems evolve, integrating compact, reliable, and precise sensing solutions is essential to meet both environmental and performance standards.
New ROHM Current Sense Amplifiers Offer High Voltage Compatibility and Compact Design
ROHM’s newly launched BD1423xFVJ-C and BD1422xG-C series of current sense amplifiers are specifically designed to address the increasing complexity of modern automotive systems. The BD1423xFVJ-C series supports input voltages up to +80V. This makes it suitable for high-voltage applications like 48V DC-DC converters and electric compressors found in EVs. On the other hand, the BD1422xG-C series supports up to +40V and is ideal for compact spaces, such as 5V/12V power monitoring in body and drivetrain domains. Both series are AEC-Q100 qualified, ensuring reliable performance in harsh automotive environments.
Designed for Electric Vehicle Systems and Safety-Critical Applications
The integration of high-accuracy amplifiers into electric vehicle power systems improves overall safety and performance. ROHM’s amps utilize a two-stage architecture—chopper amplifier and auto-zero amplifier—combined with internal resistor matching to deliver accuracy within ±1%, even under varying temperatures. These features are crucial in EVs where consistent current monitoring prevents thermal and electrical faults. Additionally, the -14V negative voltage tolerance provides protection against reverse connections and back EMF, further enhancing system reliability.
Streamlined Circuitry Enables Faster Development and Higher Efficiency
These current sense amplifiers simplify circuit design by incorporating most sensing components into a single chip. Engineers only need to connect a shunt resistor to enable high-precision current detection. Even with added external RC filters for noise suppression, the devices maintain excellent accuracy. This results in shorter development times and greater layout flexibility. With the automotive industry moving rapidly toward electrification, ROHM’s solutions directly support the efficiency, safety, and miniaturization required for next-generation electric vehicles and smart automotive platforms.
