Infineon Technologies will be launching a new family of current sensors and will be presenting its first member at this year’s PCIM trade fair. The family will consist of precise and stable coreless Hall sensors that 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.
The first product, XENSIV TLI4971, covers measurement ranges from ±25 A to ±120 A. It addresses industrial applications such as electric drives up to 50 kW or photovoltaic inverters. Infineon plans to add further members of the product family in 2020 which will be qualified for automotive applications.
The coreless open loop current sensor offers an accurate and stable current measurement – provided as an analog output voltage. Based on Infineon’s market-proven temperature and stress compensation the sensitivity error is as low as 2 percent at room temperature. It can be reduced below 2 percent with a single point in-system calibration. Furthermore, differential measurement with two Hall cells ensures high accuracy even in a noisy environment with cross-talk from adjacent current lines or magnetic stray fields.
The device has two output pins for fast overcurrent signals. Customers can program the threshold levels of the overcurrent signals and thus adopt them to system requirements without the need for further external components. The signals can be used for pre-warning and system shut-down. In addition, the device also provides a signal in case of an over- or under-voltage condition for the supply voltage.
Due to the coreless concept, the TLI4971 fits into an 8x8x1 mm leadless QFN type package (TISON-8). The layout of the current rail provides best in class thermal performance for currents up to 120 A, at no extra cost. The device is intended for use in high voltage application and incorporates galvanic isolation up to 1.1 kV (maximum repetitive isolation voltage VIORM).
The XENSIV TLI4971 will be launched in September 2019. Samples will be made available in August.
Infineon at the PCIM 2019
Infineon’s demos are going to be presented at booth #313 in hall 9 (Nuremberg, Germany, 7-9 May 2019).
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