Infineon Technologies TLI4970D025T4XUMA1

Overview

TLI4970D025T4 from Infineon Technologies is a high-precision, coreless magnetic current sensor IC for bidirectional AC/DC current measurement up to ±25 A, featuring 16-bit SPI digital output (13-bit current data), galvanic isolation rated to 2.5 kV (UL 1577), fast overcurrent detection (OCD) with configurable threshold, and integrated primary conductor eliminating external calibration. It is deployed in motor control inverters, industrial power supplies, and battery management systems requiring high linearity (<0.1% hysteresis) and lifetime accuracy of ≤1.6%.

For engineers reviewing the TLI4970D025T4 datasheet, TLI4970D025T4 pinout, TLI4970D025T4 application, or TLI4970D025T4 equivalent, key selection considerations include its ±25 A measurement range, 1.0% initial accuracy at 25°C, 2.5 kV reinforced isolation, OCD response time <2 µs, and PG-TISON-8-1 package compatibility with standard SMD reflow processes.

Technical Context

The TLI4970D025T4 employs a differential Hall-based sensing architecture with on-chip flux concentrators and integrated primary conductor, enabling coreless operation and intrinsic immunity to magnetic hysteresis. Its signal chain includes low-drift amplification, 16-bit sigma-delta ADC, and digital filtering with selectable bandwidth (100 kHz / 250 kHz).

It implements two independent digital interfaces: a 5 MHz SPI bus for full 16-bit status + current readout and a dedicated Serial Inspection and Configuration Interface (SICI) for factory calibration and parameter tuning. The OCD pin delivers asynchronous, hardware-level overcurrent alert with <2 µs propagation delay and user-configurable threshold via SPI register.

Key Specifications

Pinout & Package

TLI4970D025T4 is housed in the PG-TISON-8-1 package: a 7 mm × 7 mm, 0.65 mm pitch, leadless QFN-style thermally enhanced package with exposed thermal pad (EP) and 8 terminals. It supports standard reflow soldering and offers optimized thermal resistance (R_thJA = 45 K/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-accuracy isolated current sensing applications.

Compared with ACS724LMATR-25AB-T and TMR2003D, the TLI4970D025T4 uniquely combines 16-bit digital SPI, sub-2 µs OCD, and 1.6% lifetime accuracy in a single 7 mm × 7 mm package-making it optimal for functional-safety-critical inverters and OBCs demanding both precision and deterministic fault response.

Availability

TLI4970D025T4 is available at Aetrix Electronics and suitable for industrial motor inverters, server power supplies, and EV onboard chargers requiring stable component supply, long-term lifecycle support, and compliance with UL 1577 and IEC 60747-5-2 isolation standards.

Supply support for TLI4970D025T4 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 AG is a German semiconductor leader specializing in power management, sensor solutions, and automotive ICs, with global manufacturing and R&D infrastructure.

The TLI4970 series belongs to Infineon's Sense & Control product line, engineered specifically for high-accuracy, isolated current sensing in safety-critical power conversion systems-including industrial automation, renewable energy, and electric mobility.

FAQ

What is the maximum continuous current rating for TLI4970D025T4?

The TLI4970D025T4 supports continuous current up to ±25 A with thermal derating above 85°C ambient. Its integrated primary conductor has a typical resistance of 1.3 mΩ, resulting in <0.8 W power dissipation at 25 A, verified per Figure 3-5 heat sink recommendations in the datasheet.

Does TLI4970D025T4 require external calibration during production?

No. The device features an integrated primary conductor and factory-trimmed differential Hall sensor array, eliminating the need for end-of-line current calibration. Initial offset is ≤±25 mA at 25°C, and total error remains ≤±1.6% over lifetime and temperature without user calibration.

Can the OCD threshold be adjusted dynamically during operation?

Yes. The overcurrent detection threshold is stored in a writable SPI configuration register (address 0x02, bits [7:0]) and can be updated in real time via the SPI interface without interrupting current measurement or requiring device reset.

What is the minimum recommended PCB copper area for the EP pad?

Per Infineon's layout recommendation (Figure 5-4), the exposed thermal pad (EP) must be connected to a minimum 120 mm² internal or external GND copper pour, with ≥4 thermal vias (0.3 mm diameter, 0.6 mm pitch) connecting to inner GND planes to achieve R_thJA ≤ 45 K/W.