June 30, 2015, Seoul - Infineon Technologies (Korea CEO Lee Seung-su) has launched a 6.5kV power module that integrates IGBT and freewheeling diode functions into a single chip. This new RCDC (Reverse Conducting IGBT with Diode Control) chip is suitable for use in advanced high-speed trains and high-performance locomotives, next-generation HVDC transmission systems, and medium-voltage drives (used in oil, gas, and mining industries). RCDC technology achieves the same footprint as previous modules while increasing current density by 33 percent and achieving enhanced thermal performance. This supports longer lifespan and improved reliability, ultimately enabling minimal maintenance.

By adding RCDC technology, Infineon has expanded its high-performance 6.5kV KE3 IGBT portfolio. The improved current density was achieved by increasing dynamic silicon area for both forward and reverse current, providing designers with flexibility. In other words, without requiring additional space, system output power can be increased, or alternatively, by leveraging the enhanced power density, the number of IGBTs can be reduced while maintaining the same power level. This enables reduction in system size, weight, and cost.

Infineon's RCDC solution is provided in an IHV-A high isolation package with industrial standard footprint. Therefore, it can be directly replaced in existing applications. In addition to providing higher power density, integrating IGBT and diode functions as a single unit significantly improves the diode's I2t rating and thermal impedance (Rth/Zth) of both IGBT and diode. This achieves excellent thermal performance across the entire operating range. Additionally, with lower virtual junction temperature (Tvj) ripple, operating life is extended, and with gate control capability, designers can optimize overall efficiency by trading off conduction loss and switching loss.

Availability

Engineering samples of the RCDC module are currently being supplied, and a starter kit including driver evaluation board will be available from the fourth quarter of 2015. To simplify and accelerate implementation work, Infineon provides various design-in support including application notes and control concepts.