Electrify auxiliary systems for superior efficiency and comfort in EVs: thermal management with oil pumps, HVAC and battery control made smarter.
As vehicles transition from internal combustion engines to electrified powertrains, auxiliary systems play a critical role in ensuring performance, safety, and passenger comfort. Traditional belt-driven components are being replaced by advanced electric solutions that deliver higher efficiency, precise control, and improved reliability.
EV auxiliary systems encompass essential applications such as Battery Management Systems (BMS) for optimal energy utilization, HVAC PTC heaters and e-compressors for climate control, and battery heating and cooling to maintain optimal operating conditions. These systems are powered by high voltage battery in BEVs, HEVs, and PHEVs, as well as 48 V networks in mild hybrids, enabling seamless integration and reduced mechanical complexity. By electrifying pumps, compressors, and thermal management units, automakers can minimize energy losses, reduce wiring weight, and enhance overall system efficiency. These enhancements support extended driving range, faster charging, and greater passenger comfort.
Explore how onsemi enables these innovations with scalable, high-performance solutions designed to meet the demanding requirements of modern EV auxiliary systems. Discover automotive semiconductors covering Automotive Smart Power Module (ASPM), IGBT, EliteSiC, Super-Junction MOSFET, Automotive Power Module (APM) and gate drivers, providing flexibility to design scalable systems and optimize cost per kilowatt.
ASPM27 (650 V) and ASPM34 (1200 V) modules integrate IGBTs, gate drivers, isolation and protection to reduce PCB size and improve reliability for EV E‑compressors, pumps and fans.
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New TCPAK1012 top cool 80V MOSFETs improve thermal performance and power density by direct heat transfer to the heatsink, enabling smaller and more efficient EV power electronics.
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BLDC motor drivers and controllers enable efficient, reliable control of pumps, fans and actuators using scalable architectures, EVBs and functional safety features.
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Switch a variety of resistive, inductive and capacitive loads with advanced protection features provided by SmartFETs.
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Our SiC MOSFETs are designed to be fast and rugged and include system benefits from high efficiency to reduced system size and cost. MOSFETs are metal–oxide–semiconductor field-effect transistors with insulated gates. These silicon carbide MOSFETs have a higher blocking voltage and higher thermal conductivity than silicon MOSFETs, despite having similar design elements. SiC power devices also have a lower state resistance and 10 times the breakdown strength of regular silicon. In general, Systems with SiC MOSFETs have better performance and increased efficiency when compared to MOSFETs made with silicon material.
There are many advantages to choosing SiC MOSFETs over silicon MOSFETs, such as higher switching frequencies. High-temperature development is also not a concern when using SiC MOSFET modules because these devices can operate efficiently even in high heat. Additionally, with SiC MOSFETs, you benefit from a more compact product size because all components (inductors, filters, etc.) are smaller.
BMS rely on high‑/low‑side current sensing across shunts to measure real‑time battery current, enabling accurate state‑of‑charge estimation and fast detection of overcurrent and fault conditions.
Treo Platform is the cornerstone for next-gen intelligent power management ICs, sensor interfaces, communication devices, and standard products.
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2025年6月12日
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