Infineon Technologies TLE4973R025T5S0010XUMA1

Overview

TLE4973R025T5S0010XUMA1 from Infineon Technologies is a coreless, galvanically isolated analog current sensor IC for high-accuracy DC/AC rail current monitoring with ±27 A full-scale range, 5 V supply, ratiometric single-ended analog output (AOUT), and integrated over-current detection (OCD) with <1.0 µs response. It features an embedded current rail (220 µΩ typical insertion resistance), ISO 26262 ASIL B Safety Element out of Context qualification, and operates from −40 °C to +125 °C ambient.

For engineers reviewing the TLE4973R025T5S0010XUMA1 datasheet, TLE4973R025T5S0010XUMA1 pinout, TLE4973R025T5S0010XUMA1 application, or TLE4973R025T5S0010XUMA1 equivalent, key selection considerations include its differential Hall sensing architecture, 1150 V_VIORM functional isolation, in-system EEPROM programmability via DCDI interface, and UL 1577 certification for safety-critical automotive and industrial power systems.

Technical Context

The device implements a differential Hall plate architecture that measures magnetic field gradients induced by current flow through its integrated low-resistance (220 µΩ) copper rail-eliminating saturation and hysteresis inherent in open-loop flux-concentrating sensors. Its signal chain includes temperature- and stress-compensated amplification, quiescent output at VDD/2 (2.5 V @ 5 V), and configurable OCD thresholds stored in on-chip EEPROM.

The Digital Control Diagnostic Interface (DCDI) provides one-wire UART-based read/write access to internal registers-including temperature, OCD status, safety flags, and calibration data-with auto-addressing support for up to eight slaves. The OCD output is open-drain, active-low, and programmable with deglitch filtering.

Key Specifications

Pinout & Package

Package: PG-TISON-8-6 (8-pin SMD, 8 mm × 8 mm footprint, 1.2 mm height), RoHS-compliant, qualified for automotive reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar coreless isolated current sensing applications.

Compared with ACS724LLCTR-20AU-T and TLE4972R025T5U, TLE4973R025T5S0010XUMA1 uniquely combines ASIL B safety evidence, sub-microsecond hardware OCD, and field-programmable thresholds-making it optimal for automotive OBCs and industrial systems requiring both precision and deterministic fault response.

Availability

TLE4973R025T5S0010XUMA1 is available at Aetrix Electronics and suitable for on-board chargers, photovoltaic inverters, and smart circuit breakers requiring stable component supply, AEC-Q100 Grade 1 qualification, and long-term lifecycle support.

Supply support for TLE4973R025T5S0010XUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and sensor solutions, with global manufacturing and R&D infrastructure.

The XENSIV™ TLE4973 product line delivers high-accuracy, coreless current sensing for automotive and industrial power systems-designed specifically to replace traditional shunt+isolator combinations while meeting stringent functional safety and isolation standards.

FAQ

What is the maximum primary current the TLE4973R025T5S0010XUMA1 can safely measure?

The device has a linear full-scale range of ±27 A, verified across temperature and lifetime. Absolute maximum primary current is ±250 A for single 10 µs peaks (10 occurrences over lifetime), and ±70 A RMS for high-frequency operation (≥10 Hz). Continuous operation beyond ±27 A causes output saturation and invalidates accuracy specs.

Can VREF be connected to an external reference or left floating?

VREF is internally unused and must remain unconnected (open). Connecting it to any voltage-external reference, VDD, or GND-violates the absolute maximum rating and may damage the device. The datasheet explicitly states "Keep open" in the pin function table.

How does the DCDI interface handle multiple devices on the same bus?

DCDI uses auto-addressing: each device samples its OCD pin state during power-up reset to derive a unique 3-bit address. Up to eight units can share one DCDI line with individual pull-up resistors on OCD pins. No external address pins or jumpers are needed-address assignment is automatic and deterministic.

Is the OCD output compatible with 3.3 V logic controllers?

Yes-the OCD pin is open-drain and rated for VIO_D = −0.3 V to VDD. When pulled up to 3.3 V (not VDD), it delivers a clean 0 V / 3.3 V logic signal compatible with 3.3 V MCUs. The datasheet confirms interface pin voltage tolerance extends to the pull-up rail, not just VDD.