Current sensors are high precision coreless sensors for industrial applications - based on Hall technology
The coreless concept allows significant miniaturization compared to existing products. It is a fully digital solution, easy to use, no need for external calibration. Additionally a separate interface pin (OCD) provides a fast output signal in case the current measured by the sensor exceeds a pre-defined threshold. The small QFN-like package allows standard SMD assembly. The TLI4970 provides superior accuracy compared to existing open or closed loop systems with magnetic cores. It has additional functionality such as over current detection, zero crossing detection and programmable filters, but offers a significantly smaller footprint and power consumption.
For example, in the increasingly important solar sector, our current sensors is the perfect fit to achieve optimum system efficiency and meet country-specific regulations.
High-precision current sensor
TLI4970 is a high-precision current sensor for industrial applications based on our proven Hall technology. The core-less concept significantly reduces footprint compared with existing solutions. Infineon´s TLI4970 is an easy-to-use, fully digital solution that does not require external calibration or additional parts such as A/D converters, 0 pAmps or reference voltage. It thus significantly reduces overall implementation effort as well as PCB space and cost.
The differential measurement principle integrated in the TLI4970 sensor suppresses interference caused by external magnetic fields. Accordingly, the sensor achieves an ex-tremely low offset of just 25 mA.With conventional current measurement principles, the measuring accuracy is always governed by the ambient conditions (e.g. the temperature). Furthermore Infineon´s current sensor is more accurate than existing open-loop and com-parable to closed-loop systems. It also provides additional functions such as fast overcurrent detection and program-mable filters yet has a significantly smaller footprint and lower power consumption. The sensor is extremely robust against external magnetic fields thanks to implemented stray field suppression and is also suitable for fast overcurrent detection at a pre-con-figurable level. This allows the control unit to switch off independently of the main measurement path and protect power consumers from damage.