Current sensors

Current sensor product portfolio for industrial and automotive needs

Infineon’s product portfolio includes wide bandgap current sensors for both industrial and automotive application needs. Our current sensors achieve high accuracy using the Hall effect, which enables current measurements from DC to AC with an internal bandwidth of up to 240 kHz without being disturbed by external magnetic fields. On the one hand, we have the current sensors with an integrated current rail. The sensors in the TISON package allow the accurate measurement with high frequencies and small impact on the phase shift of the current signal. 

On the other hand, our current sensors for external current rails are non-invasive Hall effect current sensors and provide safe and reliable solutions for power electronics since there is no additional power dissipation. Our selection of isolated, non-contact current sensors can be used for current detection and monitoring in SiC and GaN applications, including motor control applications.

Coreless TLE4971 optical inspection capable

The latest additions to the XENSIV™ family range include TLE4971 high-precision coreless current sensors designed for automotive and industrial applications. With an 8x8mm SMD package, these miniature sensors offer highest ampacity by smallest form factor for easy integration and board area saving. As a trusted industrial current sensor manufacturer, Infineon’s XENSIV™ portfolio also includes UL certified coreless magnetic sensors for a wide range of industrial applications. 

TLE4971 and TLI4971 offer isolation against high voltages and best-in-class thermal performance for high currents due to their innovative TISON-8 package. They feature an integrated current rail with typical 220 µΩ insertion resistance and less than 1 nH insertion inductance, eliminating the need for external calibration and enabling ultra-low power loss. A bi-directional AC and DC current measurement IC with an analog interface and two fast overcurrent detection outputs further support protection of the power circuitry. They also offer galvanic functional isolation, very low sensitivity error over temperature and two fast over-current detection signals.

Ideal for platform designers: High-accuracy TLE4972 current sensor

For the automotive market, the XENSIV™ TLE4972 family offers a full-scale measurement range of ±31 mT, and it is possible to measure currents up to 2,000 ampere. All negative effects, such as saturation and hysteresis that are commonly known from open loop sensors using flux concentration techniques are avoided. The high bandwidth current sensors offer low phase delays and fast response times, while two separate overcurrent detection pins (OCD) provide a fast output signal in case the measurement current exceeds the configured thresholds in typical 0.7 µs. With very low power losses through the sensing structure, these sensors are ideal for platform designers. Additionally, the high-precision current sensors are ISO 26262 qualified and meet safety requirements up to ASIL B and are equipped with internal self-diagnostics. The high-accuracy current sensors are available in two packages to support a wide range of different system integration scenarios.

ISO 26262 - more about

Advanced felxibility with automotive coreless current sensors

TLE4973 family of high precision coreless current sensors for uni- or bi-directional measurement for AC and DC currents from 0 A to up to 2.000 A, is the perfect fit for automotive applications such as on-board-chargers (OBC) or BMS, but also in industrial sectors such as electric drives.

All types have an analog output as well as a separate very fast output to indicate an overcurrent event or a failure. The sensors are ideal for use in automotive applications as they are developed according ISO 26262 and classified as ASIL B products. All types come with a self-diagnosis for internal error monitoring. An external diagnosis mode can be triggered via the UART based digital control and diagnosis interface (DCDI).

To cover the large measurement range, the family offers different implementations: for low currents up to 132A the sensor comes fully calibrated in a TISON-8 package with an integrated current conductor with only 220 µΩ resistance, for medium to high currents using a thick copper layer PCB or bus bars, two grade 0 package options are available for operations up to T_amb = 150 °C, PG-TDSO-16 and PG-VSON-6.

Highlights of current sensors for automotive applications

Infineon’s coreless XENSIV™ TLE4971, TLE4972 and TLE4973 magnetic current sensors are designed to meet the current sensing requirements in automotive applications. With their compact design and diagnosis modes, our range of automotive-compliant isolated current sensors offer high voltage protection and reduce power consumption by up to 50 percent. Our high-precision Hall effect current sensors designed for automotive applications offer excellent magnetic behavior with the differential measurement principle allowing great stray field suppression for operation in harsh environments. Some key applications of TLE4971, TLE4972 and TLE4973 include automotive electrical main drives, auxiliary drives, current monitoring, overload and over-current detection, automotive power train, battery main switch, on board chargers, and more.

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Infineon's industrial galvanically isolated current sensor ICs

Infineon’s industrial galvanically isolated current sensor ICs offer functional isolation up to 1150 V peak V_IORM , and partial discharge capability of at least 1200 V. These current sensors offer very low insertion resistance and inductance due to their integrated primary conductor (current rail). This in turn minimizes power loss and enables the miniaturization of the sensing circuit as well as new fast switching power semiconductors. Two separate overcurrent pins (OCD1/OCD2) provide a fast output signal in case the current exceeds a pre-set threshold. The high-precision coreless current sensors are shipped as a fully calibrated product without requiring any customer end-of-line calibration and comes in a small 8 mm x 8 mm TISON-8 leadless package, allowing for standard SMD assembly. Nevertheless, the sensor can be reprogrammed for many parameters enabling the customer to achieve the best fit to the application requirements. Some key applications examples include electric drives up to 690 V_rms, industrial inverters, fast DC chargers for EV, photovoltaic inverters: MPPT-stage as well as PFC-stage, optional power supplies, battery management, and overload detection.