Infineon Technologies has introduced the new XENSIV™ TLE4978 series of coreless magnetic current sensors, expanding its sensor portfolio with a solution designed for high precision, ultra-low noise, and wide bandwidth applications. The device targets next-generation power systems, including EVs, renewable energy, and AI data centers.
Hybrid Hall + Coil Sensing Technology
The TLE4978 features a patented hybrid sensing architecture, combining differential Hall elements with an integrated air-core coil:
- Hall sensors handle low-frequency current (DC to kHz range)
- Coil sensors enable fast transient response
This design achieves up to 9 MHz bandwidth with only 38 mA RMS noise, while maintaining high accuracy across a wide temperature range (-40°C to 150°C), with sensitivity error as low as ±1.2%.
Optimized for SiC and GaN Power Platforms
As SiC and GaN technologies push switching frequencies higher, current sensing becomes more demanding. The TLE4978 addresses these challenges with:
- High common-mode transient immunity (CMTI)
- Calibration-free operation
- Fast overcurrent detection (100 ns response time)
- Integrated zero-cross detection (ZCD)
With a low conductor resistance of 550 µΩ and current measurement up to 60 A, it is well suited for high-efficiency power designs.
Applications Across High-Growth Markets
- Electric vehicles: onboard chargers and DC-DC converters
- Renewable energy: photovoltaic inverters
- AI data centers: high-performance power supply units
As AI workloads continue to scale, accurate and high-speed current sensing becomes essential for improving efficiency and reliability.
Automotive-Grade Reliability & Availability
The device meets stringent automotive standards:
ISO 26262 ASIL-B
AEC-Q100 Grade 0
Samples are now available, along with evaluation boards (40A / 50A / 60A) to support rapid development.
Conclusion
With the rapid expansion of AI infrastructure and electrification, advanced current sensing plays a critical role in modern power systems. The XENSIV™ TLE4978 provides a compelling solution with its innovative architecture and high-performance capabilities.
For distributors and system designers, it opens new opportunities in high-frequency, high-precision power applications.