TLI4970-D025T4_15 Datasheet, PDF (8/29 Pages) Infineon Technologies AG – High precision miniature coreless magnetic current sensor for AC

TLI4970-D025T4
Product Description
1.3
General Information
The TLI4970-D025T4 is a high-precision digital current sensor. The full scale measurement range is ±25 A. The
sensor is based on Infineon's well-established and robust Hall technology.
The measurement principle allows galvanic isolation (functional isolation) between the primary conductor and the
secondary interface side.
The coreless concept without a flux concentrator allows significant miniaturization. It shows no hysteresis effects
and has enhanced linearity and over current capability compared to existing solutions. The differential
measurement principle achieves best-in-class suppression of magnetic stray fields. The sensor is fully calibrated;
no need for any additional calibration after PCB assembly is necessary. Thus, the overall implementation effort
and costs are significantly reduced. It is a plug-and-play solution, easy to use in industrial and consumer
applications.
The accuracy of the TLI4970-D025T4 is comparable to closed-loop current measurement systems and even better
than open-loop systems with magnetic core. But in comparison to the open- and closed-loop system the TLI4970-
D025T4 enables a significantly smaller footprint and less power consumption.
Infineon's patented stress compensation circuit provides outstanding long-term stability of the output signal.
Proprietary dynamic offset cancellation techniques guarantee particularly low zero point error. Hereby, the
TLI4970-D025T4 offers superior performance.
The TLI4970-D025T4 is based on a digital concept. Thus, signal processing, compensation and calibration is
already integrated. No further external measurements for compensation are needed.
The sensor is provided in a small 7 mm x 7 mm SMD package.
1.4
Target Applications
The TLI4970-D025T4 is suitable for AC as well as DC current measurement applications:
• Current monitoring
• Chargers
• Photovoltaic & general purpose inverters
• Power supplies (SMPS)
• Electrical drive
• etc.
With its implemented magnetic interference suppression, it is extremely robust when exposed to external magnetic
fields. It is also suitable for fast over current detection with a configurable threshold level. This allows the control
unit to switch off and protect the affected system from damage, independently of the main measurement path.
Data Sheet
8
Rev. 1.0, 2015-07-02