New Infineon OPTIREG™ TLE9744QK Integrates Power and Safety for Hybrid and Electric Vehicle

Infineon Technologies AG has introduced the OPTIREG™ PMIC TLE9744QK, a fully integrated Power Management IC specifically designed for high-voltage traction inverter applications in electric and hybrid vehicles. This device consolidates complete power-supply functions, resolver excitation, and a dedicated safety engine into a single chip.

The TLE9744QK is engineered to simplify the design of traction inverter Electronic Control Units (ECUs) by effectively managing the supply of multiple isolated power rails required for microcontrollers, communication modules, and sensors. By replacing numerous discrete components with a single-chip solution, the device significantly reduces overall system cost and complexity.

Infineon highlights that this high level of integration leads to a reduced bill-of-materials count and can shrink the PCB footprint by up to 70 percent for the replaced devices, while simultaneously enhancing system reliability and functional safety. The TLE9744QK also offers broad power supply compatibility and functional interoperability with a wide array of microcontrollers and gate drivers.

A key differentiator of the TLE9744QK is its independent hardware architecture featuring Integrated Safety Logic (ISL). This ISL continuously supervises critical parameters and serves as a secondary safety path, capable of determining and enforcing a safe state if the main MCU malfunctions. A redundant supply input ensures the ISL remains operational even if the main low-voltage supply fails, contributing to the device's ASIL-D compliance, as developed according to ISO 26262 standards.

Specifications

Key Features

• Fully integrated Power Management IC designed for high-voltage traction inverter applications.
• Consolidates complete power-supply functions into a single device.
• Integrates resolver excitation and a dedicated safety engine.
• Generates the resolver excitation signal internally, eliminating the need for external resolver driver and monitoring circuits.
• Provides broad power supply compatibility.
• Provides functional interoperability with a wide range of microcontrollers and gate drivers.
• Supports off-board sensor supply for additional layout flexibility.
• Includes Integrated Safety Logic (ISL) that continuously supervises phase currents, DC-link voltage, and the health status of the MCU and gate drivers.
• The ISL acts as a secondary, independent safety path and determines and enforces a safe state in the event of main MCU dysfunction.
• A redundant supply input keeps the ISL operational if the main low-voltage supply fails.
• The device reduces bill-of-materials count and can shrink the PCB footprint by up to 70 per cent for the replaced devices.
• Samples, evaluation boards, reference designs, documentation, software, and tools are available upon request.

Applications

• High-voltage traction inverter applications in electric vehicles.
• High-voltage traction inverter applications in hybrid vehicles.

Availability

The Infineon OPTIREG™ TLE9744QK Power Management IC is available through Infineon for high-voltage traction inverter applications in electric and hybrid vehicles. Infineon provides product information for the TLE9744QK through its official product page, where customers can access further details about the device and its availability. Samples, evaluation boards, reference designs, documentation, software, and tools are also available upon request.