IGBT drivers for EV and HEV drive trains to ISO 26262

May 22, 2013 // By Graham Prophet
Power device drivers from Infineon enable faster and more cost-effective realisation of ASIL C/D Designs for Hybrid and Electric Vehicle Subsystems; the company has announced early-sample availability of EiceDRIVER SIL and EiceDRIVER Boost IGBT Drivers.

The next generation of Infineon's high-voltage IGBT gate drivers designed for the main inverter of hybrid and electric vehicles (HEV), the new EiceDRIVER SIL and the EiceDRIVER Boost drivers enable automotive system suppliers to more easily and more cost-effectively design HEV drivetrain subsystems that are compliant with ASIL C/D functional safety requirements (ISO 26262). Target applications of the new EiceDRIVERs are HEV inverters of up to 120 kW using 400V, 600V and 1200V IGBTs. Early samples of the EiceDRIVER SIL and EiceDRIVER Boost are available with broad sampling planned for December 2013.

The AECQ100-qualified EiceDRIVER SIL (1EDI2001AS) and EiceDRIVER Boost (1EBN1001AE) offer a feature set to drive and control IGBTs in an automotive inverter. They provide galvanic isolation, bidirectional signal transmission, active short-circuit support and optimised IGBT switching capabilities. Implemented as a chipset, the two devices can save significant PCB area of up to 20% in the HEV subsystem. Also, the features implemented in the EiceDRIVER SIL and EiceDRIVER Boost reduce overall system level costs as they eliminate up to 60 discrete components.

The EiceDRIVER SIL (1EDI2001AS) is a high-voltage IGBT gate driver designed for automotive motor drives up to 120 kW. EiceDRIVER SIL is based on Infineon's Coreless Transformer technology, providing galvanic isolation between low-voltage and high-voltage domains. The EiceDRIVER SIL features a standard SPI interface for control and diagnosis, with transmission speed up to 2 Mbaud. A large range of safety-related functions is implemented to support functional safety requirements at system level. These include over-current monitoring, runtime monitoring of all power supplies, oscillators, gate signals and output stage. A verification mode allows system-level diagnosis including error injection and weak turn-on. On the high-voltage side the EiceDRIVER SIL is dimensioned to drive an external booster stage. It comes in a PG-DSO-36 package.

The EiceDRIVER Boost (1EBN1001AE) is a single-channel IGBT booster fully compatible with the EiceDRIVER SIL. EiceDRIVER Boost is based on high-performance bipolar technology and replaces buffer stages