Infineon Technologies TLI4970D025T5XUMA1

Overview

TLI4970D025T5 from Infineon Technologies is a coreless magnetic current sensor IC for isolated AC/DC current measurement up to ±25 A, featuring 16-bit SPI digital output, galvanic isolation rated to 2.5 kV (UL 1577), fast overcurrent detection (OCD) with configurable threshold, and integrated primary conductor eliminating external calibration. It operates across –40 °C to +125 °C and delivers ≤3.5 % total error over lifetime in industrial motor drives.

For engineers reviewing the TLI4970D025T5 datasheet, TLI4970D025T5 pinout, TLI4970D025T5 application, or TLI4970D025T5 equivalent, key selection criteria include isolation voltage compliance, OCD response time (<2 µs), ±25 A full-scale range, 13-bit current resolution, and PG-TISON-8-1 package compatibility with high-density SMD layouts.

Technical Context

The TLI4970D025T5 uses a differential Hall-based sensing architecture with on-chip flux concentrators to achieve high stray-field immunity (>1.5 mT rejection). Its signal chain includes a 13-bit ADC, digital filter with selectable bandwidth (100 kHz / 250 kHz), and status register reporting saturation, offset drift, and OCD flag.

It implements a dedicated open-drain OCD pin that asserts within 1.8 µs (typ.) when sensed current exceeds user-configured threshold, independent of SPI readout. The SPI interface supports 5 MHz clock rate with frame-based current and status data transmission, enabling real-time closed-loop control in inverters and SMPS.

Key Specifications

Pinout & Package

TLI4970D025T5 is housed in the PG-TISON-8-1 package: a 7 mm × 7 mm, 0.55 mm profile, leadless QFN-style housing with an exposed thermal pad (EP) and eight terminals arranged in a 2×4 grid. The package supports reflow soldering per IPC/JEDEC J-STD-020 and provides creepage/clearance ≥8.0 mm for reinforced isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ACS724LLCTR-20AU-T and TMR2003D, the TLI4970D025T5 uniquely integrates hardware-accelerated OCD, 13-bit SPI resolution, and coreless linearity-making it optimal for safety-critical, high-speed power conversion where deterministic fault response and digital diagnostics are mandatory.

Availability

TLI4970D025T5 is available at Aetrix Electronics and suitable for industrial motor drives, server power supplies, EV onboard chargers, and renewable energy inverters requiring stable component supply, long-lifecycle support, and certified isolation compliance.

Supply support for TLI4970D025T5 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 manufacturer specializing in power management, sensing, and automotive ICs, with global R&D and manufacturing infrastructure.

The TLI4970 series belongs to Infineon's Sense & Control product line, engineered specifically for high-accuracy, isolated current measurement in industrial and automotive power electronics where reliability, speed, and integration reduce system complexity.

FAQ

What is the maximum recommended PCB copper area for the EP pad to maintain junction temperature below 150 °C at 25 A DC?

For continuous 25 A DC operation at +85 °C ambient, Infineon specifies a minimum 400 mm² (20 mm × 20 mm) internal or external copper pour connected to the EP pad via ≥6 thermal vias (0.3 mm diameter, filled). This achieves ≤45 °C temperature rise above ambient, keeping junction temperature within 150 °C limit. Smaller pads require derating per Figure 3-5 in the datasheet.

Can the OCD threshold be changed dynamically during operation without interrupting current measurement?

Yes. The OCD threshold is configured via SPI write to the CONFIG register (address 0x01), and changes take effect immediately after the write cycle completes. Current measurement continues uninterrupted during configuration, and the new threshold applies to the next overcurrent event. No reset or reinitialization is required.

Does the TLI4970D025T5 require external filtering on the VDD supply line?

Yes. A 10 µF X5R ceramic capacitor placed within 2 mm of the VDD pin and a 100 nF capacitor in parallel are mandatory per Section 3.4 of the datasheet. These suppress high-frequency noise from the digital interface and prevent false OCD triggering or SPI communication errors under transient load conditions.

How does the TLI4970D025T5 handle magnetic field interference from adjacent current-carrying conductors?

Its differential Hall sensor architecture provides >40 dB suppression of uniform external fields up to ±1.5 mT, verified per IEC 62109-2 test methods. Layout best practices-such as orthogonal routing of nearby traces and ≥10 mm separation from busbars-further reduce coupling. No shielding is required in typical industrial layouts.