Infineon focuses on SiC designs with isolated gate driver ICs and opto-emulator input

Infineon has introduced its inaugural isolated gate driver IC family featuring an opto-emulator input, with the aim of streamlining the transition from optocoupler-based control systems to the next generation of SiC power stages. The newly launched EiceDRIVER 1ED301xMC12I devices are designed to be pin-compatible with existing opto-emulators and optocouplers, as stated in the release.

For designers of industrial and energy systems among eeNews Europe readers, this development is significant as it signifies a quicker route to adopting higher-efficiency SiC technology without the need for a complete redesign of the control board. It also underscores the trend of enhancing gate driver performance to meet the speed and robustness requirements of modern wide-bandgap power conversion.

Pin-Compatible Isolated Drivers for SiC, IGBTs, and MOSFETs

The EiceDRIVER 1ED301xMC12I family comprises three variants: the 1ED3010, 1ED3011, and 1ED3012. Infineon states that these devices are specifically engineered to support Si MOSFETs, IGBTs, and SiC MOSFETs, respectively, catering to a broad spectrum of power conversion topologies.

An important takeaway from the announcement is that these devices enable engineers to retain opto-based input configurations while upgrading to SiC power stages. This is particularly relevant in markets where expediency and qualification efforts often take precedence over the performance gains of a more disruptive overhaul.

Infineon positions this new family of gate drivers for applications that demand high-speed, reliable, SiC-compatible gate drivers, such as motor drives, solar inverters, EV chargers, and energy storage systems.

High CMTI and Tighter Timing for Robust Switching

Infineon emphasizes the electrical performance as a key distinguishing factor. All variants offer an output current of up to 6.5A, which the company claims is best-in-class for driving power modules and parallel switch configurations.

The opto-emulator input, utilizing two pins, is engineered for high noise immunity. According to the release, the devices boast common-mode transient immunity (CMTI) exceeding 300kV/µs, a propagation delay of 40ns, and timing matching below 10ns, facilitating more precise and consistent switching behavior. Infineon also mentions a "pure PMOS sourcing stage" to enhance turn-on performance.

These ICs are available in a CTI 600 6-pin DSO package with over 8mm of creepage and clearance. The insulation is certified to UL 1577 and is awaiting certification to IEC 60747-17, as highlighted by the company.