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Infineon OPTIREG TLE9744QK PMIC Simplifies EV Traction Inverter Design

Infineon Technologies has introduced the OPTIREG TLE9744QK, a fully integrated power management IC (PMIC) specifically designed for high-voltage traction inverter electronic control units (ECUs) in electric and hybrid vehicles. The device combines multiple power-supply functions, resolver excitation, and advanced safety features in a single chip, significantly simplifying system design.

Key Characteristics and Features

• Fully integrated PMIC combining power supply, resolver excitation, and safety functions
• Reduces bill of materials (BOM) and PCB footprint of replaced devices by up to 70%
• Internal generation of resolver excitation signal (no external driver/monitoring circuits required)
• Supports multiple power supply configurations
• Compatible with a wide range of microcontrollers and gate drivers
• Off-board sensor supply capability for flexible PCB layout
• Integrated Safety Logic (ISL) — independent hardware safety block
• Monitors phase currents, DC-link voltage, microcontroller status, and gate driver status
• Redundant supply input keeps the ISL active even if the main low-voltage supply fails
• Developed according to ISO 26262
• Supports ASIL-D compliance for traction inverter applications

The TLE9744QK enables designers to use existing microcontroller platforms with minimal hardware changes while providing a robust independent safety path that can place the system into a safe state if the main microcontroller fails.

Target Applications

• High-voltage traction inverters for battery electric vehicles (BEV)
• Hybrid electric vehicle (HEV) powertrains
• Traction inverter electronic control units (ECUs)

By integrating power management, resolver excitation, and functional safety into one device, the OPTIREG TLE9744QK helps reduce system complexity, cost, and board space in next-generation EV powertrains.

Source: Electronics For You