Principal Applications Engineer

We’re looking for an experienced Principal Applications Engineer with deep expertise in power MOSFETs and high-performance power converter design. This senior individual contributor role will serve as the technical authority for customer designs using our Super-"Q" MOSFETs in demanding applications up to 10 kW and beyond, with particular emphasis on motor drives, phase-shifted full-bridge (PSFB), and LLC resonant converter topologies. You will work directly with tier-1 customers, provide reference designs, drive new product definition, and act as the voice of the customer internally.

This role reports to the Vice President of Applications Engineering

• Serve as the primary technical interface for strategic customers designing with our 150-650V SuperQ MOSFETs
• Develop, document, and support high-efficiency reference designs (up to 10 kW) featuring:
• Traction inverters and on-board chargers for EV/HEV
• Industrial motor drives and servo drives (3-phase, up to 10 kW)
• Phase-shifted full-bridge (PSFB) topologies for isolated DC-DC conversion
• LLC resonant converters (half-bridge and full-bridge)
• Totem-pole PFC and other high-frequency topologies
• Perform detailed power-loss modeling, thermal analysis, and efficiency optimization using SiC-specific tools (PLECS, LTspice, Mathcad, etc.
• Design and validate gate-drive circuits optimized for fast switching (low inductance, negative-voltage turn-off, active Miller clamping, short-circuit protection, etc.)
• Conduct customer training, design reviews, and on-site debugging of applications.
• Generate application notes, white papers, evaluation board user guides, and competitive teardowns focused on SuperQ advantages.
• Collaborate with IC design, reliability, and marketing teams to define next-generation SuperQ MOSFETs based on real customer pain points.
• Support field applications engineers and distribution FAEs globally.

• MSEE or PhD in Power Electronics (or BSEE + 10+ years relevant experience).
• 8+ years of hands-on experience designing switched-mode power supplies or motor drives using best in class HV MOSFETs and/or wide-bandgap devices (SiC MOSFETs or GaN HEMT experience a plus).
• Proven track record of successful production designs in the following:
• 3-phase motor drives/inverters (up to 10 kW or higher)
• Phase-shifted full-bridge converters
• Totem-pole bridgeless PFC
• Expert-level knowledge of:
• Si/SiC MOSFET switching behavior, body-diode characteristics, and third-quadrant operation
• High-speed, low-inductance layout techniques for High Performance SI/SiC
• Magnetic design for high-frequency transformers and resonant inductors
• Proficiency with simulation tools (PLECS, SIMetrix/SIMPLIS, LTspice, PSIM) and lab equipment (high-bandwidth scopes, double-pulse test rigs, calorimetric measurement). (Ability to create SPICE models and validate a plus)
• Strong customer-facing skills; ability to explain complex technical concepts clearly.
• Willingness to travel ~10-25% (domestic and international).

• Prior experience at a Top Tier Power MOSFET, SiC or GaN semiconductor manufacturer.
• Published papers or patents in power electronics in aforementioned topologies.
• Familiarity with automotive (AEC-Q101) or industrial qualification requirements is a plus.

Experience with digital control (TI C2000, STM
32, Microchip dsPIC) for motor drives and resonant converters is a plus.

• Work on next-generation silicon technology redefining performance limits
• Direct impact on products used in high-growth markets
• Collaborative, low-ego culture with high technical depth
• Opportunity to grow with a scaling semiconductor company
• Exposure to global customers and cutting-edge applications
• Opportunity to shape the future of next generation converters