The race to shrink inverter ECU complexity is reshaping semiconductor design priorities across the EV supply chain.
Infineon Technologies has launched the Optireg TLE9744QK, a power management IC designed for high-voltage traction inverter applications in electric and hybrid vehicles. This innovative chip combines multiple power supply functions, resolver excitation, and a hardware safety engine into a single device, resulting in a printed circuit board footprint reduction of up to 70% and a decrease in bill-of-materials complexity.
The Munich-based semiconductor company notes that this device effectively addresses the challenge of supplying multiple isolated power rails to microcontrollers, communication modules, and sensors within inverter electronic control units. By generating the resolver excitation signal internally, the TLE9744QK eliminates the need for external driver and monitoring circuits, offering broad compatibility with existing microcontroller and gate driver platforms. This design aims to minimize hardware redesign efforts and accelerate development timelines.
The OPTIREG™ PMIC TLE9744QK consolidates complete power-supply functions, resolver excitation, and a dedicated safety engine into a single device.
An onboard Integrated Safety Logic (ISL) block independently monitors phase currents, DC-link voltage, and the health of connected microcontrollers and gate drivers. In the event of a main processor failure, the ISL ensures a defined safe state by maintaining a redundant supply input that remains operational during low-voltage supply faults. This architecture meets ASIL-D, the highest functional safety level under ISO 26262, ensuring that safety functions continue to operate even in the event of a main supply failure.
The TLE9744QK is now available, with samples, evaluation boards, reference designs, and documentation available upon request.
Source: Infineon
