The TLI4970 is a highly accurate current sensor based on Infineon’s well established Hall technology. The cordless 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.
Product Highlights
- AC & DC measurement range up to ±50A
- Highly accurate over temperature range and lifetime (max. 1.0% (0 h), 1.6% (over lifetime) of indicated value)
- Low offset error (max. 25mA)
- High magnetic stray field suppression
- Fast overcurrent detection with configurable threshold
- Galvanic isolation up to 2.5kV max. rated isolation voltage (UL1577)
- 16 bit digital SPI output (13 bit current value)
Small 7.0 x 7.0 mm SMD package - The TLI4970 provides superior accuracy compared to existing open or closed loop systems with magnetic cores. It has additional functionality such as overcurrent detection, zero crossing detection and programmable filters, but offers a significantly smaller footprint and power consumption.
Applications
The TLI4970 is suitable for AC and DC current measurement applications like photovoltaic- and general purpose inverters, Power Supplies (SMPS), battery chargers, lighting applications, electrical drives, and many more. With its implemented magnetic interference suppression, it is extremely robust when exposed to external magnetic fields. It is also suitable for fast overcurrent 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.
For more information on TLI4970 – current sensor family, please refer to here.
