Power Electronics Lead – Integrated Rack 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 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.

Responsibilities

• 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:

  • LLC resonant converters
  • Phase-shifted full bridge (PSFB)
  • Hybrid converter approaches
  • In-line versus parallel sidecar battery integration

• 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
  • Phase margin optimization

• Partner with the Battery Systems Engineer to define:

  • Charge/discharge power path
  • Voltage operating window
  • Current limits for solid-state battery cells

• 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:

  • EMI-conscious layout
  • Proper creepage and clearance
  • Power plane integrity

Requirements

• 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
  • PSF
  • DAB
  • LLC equivalent architectures

• Hands-on magnetics design experience including:

  • Core selection
  • Winding strategy
  • Loss modeling

• Proven track record developing:

  • Server power supplies
  • Telecom rectifiers
  • 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.

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.

• Experience developing battery charging systems including:

  • CC-CV charging profiles
  • Temperature-dependent charge rate management

• Experience with Hardware-in-the-Loop (HIL) testing platforms including:

  • Typhoon HIL
  • PLECS RT Box