Power Electronics Mixed-Signal

Benjamin M. Bian

303-***-**** **********@*****.*** linkedin.com/in/benbian

Summary

Experienced Power Electronic Engineer with expertise in designing and testing power converters for high-stakes applications. Key contributions include: - Development of efficient Fly-Buck converters enhancing efficiency for industrial applications - Execution of rigorous worst-case analyses to ensure system reliability and adherence to industry standards - Design and implementation of satellite power systems with Zuken, improving performance reliability. Motivated to apply this experience to drive innovative power solutions in the automotive and energy sectors.

Skills

Technical Skills: Power Electronics, Topologies Understanding, Si/SiC/GaN MOSFETs, PID Control Design, Loss Modeling, PMIC verification, Switching Waveforms, Gate Driving Circuit Design, LTSPICE, MATLAB, Cadence, LabVIEW, C/C++, python, SIMPLIS

Design Skills: Mixed-Signal Design, Digital Design, Analog Design, Thermal Design

Technical Proficiency: EE Tools Proficiency, Device Characteristics, Modulation Schemes, Magnetics Theory, Diodes, EMC Optimization

Tools: ADS tool, DxDesigner, VBScript, TCL

Work Experience

Lockheed Martin Sunnyvale, CA

Power Electronic Engineer-Staff Feb 2020 - Jun 2024

Developed a Fly-Buck topology, incorporating transformer turn ratios to optimize device characteristics and enhance power electronics efficiency for space applications.

Conducted comprehensive worst-case analysis of DC-DC, DC-AC and AC-DC converters, leveraging MathCAD and OrCAD for effective ECS/DC analysis and control design.

Designed schematics and power supply layouts for satellite buses using Zuken, ensuring reliable mixed-signal and digital design accuracy for space missions.

Applied mathematical techniques to optimize thermal-current relationships and feature equations in IC components, enhancing semiconductor thermal design.

Raytheon Tucson, AZ

Senior Electrical Engineer 1 Apr 2017 - Jan 2020

Led power analysis and circuit protection reviews for secure and efficient power electronics, aligning with system reliability goals in hypersonic systems.

Verified electrical power distribution subsystems, enhancing RF and mixed-signal design accuracy with ADS tools for hypersonic missile systems.

Simulated and verified RF systems through effective modulation schemes and error calculations, ensuring precise diodes, switching, and waveform analysis.

Mentored an intern during the design and validation of a buck converter DC-DC project, fostering skill development in topologies, gate driving circuits, and hardware design.

Bit Group Irvine, CA

Test Engineer Lead (contract) Oct 2016 - Feb 2017

Engineered test plans for PCBA in buck DC-DC and boost converters for medical devices, ensuring reliable performance and compliance with medical standards

Wattstopper Carlsbad, CA

Design Engineer (contract) Mar 2015 - Sep 2016

Redesigned Flyback converter AC-DC, selecting and simulating IGBT (MOSFET) components in PSPICE, resulting in improved efficiency and reliability

Improved Flyback converter magnetic transformer design to address core saturation and core loss issues, enhancing overall performance and reducing failure rates

Developed and optimized DC-DC buck converter output sensor resistors using feedback loop analysis with PID controllers, achieving more stable output and increased efficiency

Executed high-voltage test plans for Flyback converters, analyzing results and diagnosing EMI and ESD issues, leading to improved safety and compliance with industry standards

Broadcom Irvine, CA

IC Mixed Signal Test Engineer/Power May 2010 - Dec 2014

Developed and implemented testing processes for Power Management Units (PMU) in mobile devices (ANDROID), including LDOs, PSRR, RTC, battery chargers, DC-DC buck and boost converters, jitter, I2C and phase noise testing.

Ensured DC-DC buck converter stability and efficiency through rigorous load response, line response, and voltage/current testing.

Supported electrical power system verification testing and analysis, and authored detailed test reports for the design team.

Contributed to system and sub-system level design trades and requirement development; tested integrated cell phone functionality including low power tests, AP and CP Power Island debugging with digital analyzers to maintain low power modes.

Developed and deployed VBScript and LabVIEW automation processes, achieving a 40% reduction in production time for regression testing over one year.

Tested integrated cell phone functions using Linux kernel platforms, optimizing power usage and saving 3 hours per week in testing.

Developed and implemented VBScript and TCL scripts to control JDSU scope for automating PHY functionality tests on SerDes chips in 40G, XFI, and OTU3 modes, resulting in a daily time saving of 2 hours.

Verified I/O and SPI functionality in embedded systems and ASIC VLSI design, resulting in a daily automation test time savings of 3 hours.

EchoStar Comm. Corp. Denver, CO

FIRMWARE ENGINEER May 2008 - Dec 2009

Developed and implemented C code for Timer Management Systems (TMS) on multi-module Set-Top-Boxes (STB), increasing product usage by 50%

Designed and implemented user interfaces and screen widgets using VBScript and TCP/IP protocols, increasing customer convenience in program subscriptions over UPnP networks

Optimized data transmission and storage efficiency by formatting and parsing data into XML for IPTV standards, boosting communications speed by 25% and storage efficiency by 50%.

Education

California State University, Fullerton

MS, Electrical Engineering

University of Colorado, Boulder

BS, Electrical & Computer Engineering

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