Infineon Technologies AG has launched the OPTIREG TLE9744QK, an integrated Power Management IC designed for high-voltage traction inverter systems used in electric and hybrid vehicles. The device combines power-supply management, resolver excitation, and a dedicated safety engine in one chip.
By bringing these functions together, the TLE9744QK simplifies the design of traction inverter ECUs and eliminates much of the complexity involved in providing multiple isolated power supplies for microcontrollers, communication interfaces, and sensors. Replacing several discrete components with a single integrated solution can reduce system cost and component count. Infineon says the solution can cut the PCB area occupied by the replaced components by up to 70 percent, while also improving system reliability and functional safety.
This integration is achieved by embedding critical peripheral functions directly into the silicon. The OPTIREG TLE9744QK can generate the resolver excitation signal internally, eliminating the need for external resolver driver and monitoring circuits. Furthermore, it offers broad power supply compatibility and functional interoperability with a wide range of microcontrollers and gate drivers. This flexibility allows system designers to leverage existing MCU platforms without extensive hardware redesigns, thereby accelerating time-to-market. Support for off-board sensor supply provides additional layout flexibility for optimized system design.
The device further enhances system reliability and safety through an independent hardware architecture. The Integrated Safety Logic (ISL) continuously supervises critical parameters, including phase currents, DC-link voltage, and the health status of the MCU and gate drivers. Acting as a secondary, independent safety path, the ISL determines and enforces a safe state in the event of main MCU dysfunction. To ensure this protection remains active during power faults, a redundant supply input keeps the ISL operational if the main low-voltage supply fails. This independent design ensures that safety functions are not compromised by a main low-voltage supply failure, fulfilling ASIL-D compliance as developed according to ISO 26262 standards.
Availability
The OPTIREG TLE9744QK is available now. Samples, evaluation boards, reference designs, documentation, software, and tools are available upon request.
