Current sensors XENSIV™ - high-precision coreless current sensors
Used to measure both AC and/or DC currents, Infineon’s current sensors provide accurate and stable current measurement up to 120 A or 31mT respectively. Our magnetic current sensors include either an integrated current rail in the package for low currents or measure the magnetic field of an external current rail for medium to high currents. The products are intended for use in 48 V, as well as high voltage and/or wide bandgap applications such as traction inverters, industrial drives, photovoltaic inverters, or EV charging systems.
Infineon’s XENSIV™ family of high-precision coreless open-loop current sensors are less bulky, and cost less compared to core-based current sensors. Based on Infineon’s precise and stable Hall effect current sensor IC technology, the current sensor analog output signal is highly linear over temperature and lifetime. Due to lacking an iron core or a flux concentrator, the sensor signal shows neither hysteresis nor does it suffer from saturation.
The differential current sensor measurement with two Hall cells ensures high accuracy even in a noisy environment like crosstalk from adjacent current lines or magnetic stray fields. System designers can program the sensitivity of the sensor as well as the threshold levels of the two dedicated overcurrent signals and therefore adapt them to individual requirements without any external components. The contactless current sensor IC also provides a warning signal in case of an over- or under-voltage condition for the supply voltage.
Current sensor product portfolio
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.
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. Some of the key features of TLE4971 and TLI4971 include:
- best-in-class thermal performance for high currents due to their innovative TISON-8 package and isolation against high voltages
- an integrated current rail with typical 220 µΩ insertion resistance and less than 1 nH insertion inductance which eliminates the need for external calibration and enables ultra-low power loss
- bi-directional AC and DC current measurement IC with an analog interface and two fast overcurrent detection outputs that support protection of the power circuitry
- galvanic functional isolation due to the magnetic sensing principle
- very low sensitivity error over temperature
- Two fast over current detection signals with a reaction time of typical 0.7 µs
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.
The Infineon 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 Tamb = 150 °C, PG-TDSO-16 and PG-VSON-6.
Current sensor applications
From compact and precise current sensors for high voltage batteries to high-speed current sensors designed for high-voltage industrial applications such as electric drives, photovoltaic inverters, chargers and power supplies. Infineon’s current sensor portfolio offers highly accurate, scalable, DC and AC current sensing for a wide range of SiC and GaN applications, including low resistance and low inductance current sensor applications.
Infineon’s coreless XENSIV™ TLE4971 and TLE4972 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.
Key applications include:
- Automotive electrical main drives
- Auxiliary drives
- Current monitoring
- Overload and over-current detection
- Automotive power train
- Battery main switch
- On board chargers, etc
Infineon’s industrial galvanically isolated current sensor ICs offer functional isolation up to 1150 V peak VIORM, 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.
Key applications include:
- Electric drives up to 690 Vrms
- Industrial inverters
- Fast DC chargers for EV
- Photovoltaic inverters: MPPT-stage as well as PFC-stage
- Optional power supplies, battery management and overload detection
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Market news current sensors
Munich, Germany – 4 November, 2022 – Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) today announced the addition of the new XENSIV™ TLE4971 family to its current sensor portfolio for automotive applications. The 3.3 V devices are the next generation of TLI4971 devices available in a TISON package with an integrated rail and available in four different pre-programmed current ranges: 25 A, 50 A, 75 A and 120 A. With a compact design and state-of-the-art sensing, the TLE4971 is ideal for automotive use cases including on-board chargers (OBC), high-voltage auxiliary drives and charging applications. Additionally, the current sensor is also ideal for industrial applications including DC chargers for electric vehicles, industrial drives, servo drives and PV inverters.
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Munich, Germany – 27 October, 2021 – Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) launches its first automotive current sensor: the new XENSIV™ TLE4972. The coreless current sensor uses Infineon’s well-proven Hall technology for precise and stable current measurements. With its compact design and diagnosis modes, the TLE4972 is ideal for xEV applications like traction inverters used in hybrid and battery-driven vehicles, as well as for battery main switches.
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Munich, Germany – 3 May 2019 – Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) will launch a new family of current sensors and is presenting its first member at this year’s PCIM trade fair. The family will consist of precise and stable coreless Hall sensors. They offer a high level of flexibility as customers can individually program product parameters such as the current range, the overcurrent threshold and the output mode.
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Productive Programmer @ CGS
ISCM Infineon TLI4971
The CompactRIO module “Intelligent Sensor Calibration Module” Infineon developed by CGS can program and calibrate up to 3 Infineon TLI4971 current sensors in parallel. Additionally, the module provides 5 measuring channels for the analog measurement of the sensors with up to 500kS/s.
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