Power Electronics Lead - Integrated Rack Power Platform

Power Electronics Lead – Integrated Rack Power Platform Location: San Jose, CA (On-site) Reports To: Head of Engineering, Data Center Power Platform About the Role We are building a first-of-its-kind integrated PSU + BBU rack power shelf that collapses the traditional two-shelf architecture (separate power supply and battery backup) into a single, high-density platform powered by solid-state battery technology. This shelf will compete directly with incumbent rack power offerings from Delta, LITEON, and similar vendors, targeting hyperscale AI data center deployments. As the Power Electronics Lead , you will own the complete power conversion architecture—from AC mains or 48V DC bus input through regulated output rails, including the bidirectional charge/discharge path for the integrated solid-state battery pack. You will serve as the chief engineer for the power stage and the technical decision-maker whose topology choices influence every engineering discipline on the team. What You'll Do Architect the end-to-end power conversion topology, including: AC-DC front end Intermediate bus DC-DC output stage Bidirectional battery converter path Lead topology trade-off analysis across: Phase-shifted full bridge (PSFB) In-line versus parallel sidecar battery integration Design magnetics including planar transformers and coupled inductors. Select power semiconductors (GaN/SiC FETs and diodes) with thermal derating analysis. Define and drive efficiency targets (97%+ Titanium-class performance at rack load) and power density goals within a 1OU or 2OU shelf envelope. Collaborate closely with firmware and embedded engineering on digital control loop implementation including: Voltage/current mode compensation Loop bandwidth Partner with the Battery Systems Engineer to define: Voltage operating window Current limits for solid-state battery cells Design protection circuitry including: Overcurrent Protection (OCP) Overvoltage Protection (OVP) Define system fault response behavior. Bring up and validate prototype power stages through: Hardware bring-up Thermal characterization Efficiency optimization Work closely with PCB layout engineers to ensure: Proper creepage and clearance Power plane integrity What You Bring Required Qualifications 10+ years designing multi-kW AC-DC or DC-DC power converters that have shipped in volume. Deep expertise in at least two converter topologies such as: LLC PSFB DAB CLLC Core selection Experience with digital power control using DSP/MCU-based compensation techniques. Server power supplies EV onboard chargers Comparable high-density power products Proficiency using simulation tools including:

PLECS

LTspice Simplis PSIM Comfortable providing technical leadership and mentoring a small cross-functional engineering team. Preferred Qualifications Experience designing with GaN or SiC wide-bandgap power devices. Familiarity with 48V and high-voltage DC bus architectures. Experience with bidirectional power converters, especially integrated battery charging paths. Knowledge of Open Compute Project (OCP) Open Rack / ORv3 power delivery specifications. CC-CV charging profiles Experience with Hardware-in-the-Loop (HIL) testing platforms including: Typhoon HIL PLECS RT Box Why This Role Matters Your architectural decisions will define the entire product. Whether the battery is integrated inline or connected through a sidecar bus, whether the system utilizes GaN at 48V or silicon at 12V, and whether hold-up transfer occurs in microseconds or requires a brief interruption—every downstream engineering discipline will build upon your decisions. This is a rare opportunity to design a next-generation rack power platform from a blank sheet using breakthrough solid-state battery technology that fundamentally changes what is possible for AI data center power infrastructure. #J-18808-Ljbffr QuantumScape