Power Electronics Application Engineer

Phihong USA; Fremont (CA); On-site; USD 110,000 - 160,000; Full time

Benefits offered by this job

Medical Insurance

401(k) Plan

Paid Vacation

Professional Development

Employee Assistance

Flexible Work Arrangements

Job summary

Phihong USA in Fremont, CA seeks a power electronics engineer with 5+ years in power supply design to support customers and drive next-generation power products. You will develop reference designs, assist with system integration, and participate in cross-functional product development.

The role requires deep knowledge of AC-DC/DC-DC topologies, PoE, thermal design, and EMC/EMI testing, with strong analytical and presentation skills. On-site collaboration is expected.

Qualifications

• Must have strong knowledge of AC-DC and DC-DC topologies and power conversion.
• Experience supporting customers in a technical role is preferred.
• Experience with PoE and Ethernet power delivery is a plus.

Responsibilities

• Provide pre-sales and post-sales technical support for power supply and power conversion products.
• Analyze customer requirements and recommend appropriate power solutions.
• Assist customers with product selection, system integration, and design optimization.
• Support customer qualification testing and resolve field application issues.
• Develop reference designs and evaluation platforms.
• Generate test reports and technical documentation.
• Conduct electrical, thermal, EMC/EMI testing and debug hardware issues.
• Deliver presentations, product demonstrations, and technical training.
• Collaborate with design, quality, manufacturing, and product management teams.

Skills

Power electronics

Power supply design

Applications engineering

Technical presentation

Customer support

Problem solving

Education

Bachelor's degree in Electrical Engineering

Master's degree in Power Electronics preferred

Tools

Oscilloscopes

Power analyzers

Electronic loads

Network analyzers

Spectrum analyzers

Thermal test equipment

Job description

Key Responsibilities

• Provide pre-sales and post-sales technical support for power supply and power conversion products.
• Analyze customer requirements and recommend appropriate power solutions.
• Assist customers with product selection, system integration, and design optimization.
• Support customer qualification testing and resolve field application issues.

Application Development

• Develop reference designs, evaluation platforms, and application notes.
• Create and validate customer-specific solutions using AC-DC, DC-DC, PoE, battery charging, and power management technologies.
• Perform circuit simulation, characterization, and performance verification.
• Generate test reports and technical documentation.

Product Validation & Troubleshooting

• Conduct electrical, thermal, EMC/EMI, reliability, and performance testing.
• Debug hardware and system-level issues.
• Support root-cause analysis of customer returns and field failures.
• Work closely with design engineering teams to implement corrective actions.

Technical Sales Support

• Deliver customer presentations, product demonstrations, and technical training.
• Participate in customer design reviews and engineering discussions.
• Support RFI, RFQ, and technical compliance activities.
• Assist in developing competitive product comparisons and positioning.

Cross-Functional Collaboration

• Work with design, quality, manufacturing, and product management teams.
• Provide feedback on customer requirements for future product development.
• Support new product introduction (NPI) activities.
• Help define specifications for next-generation power products.

Required Qualifications

Education

• Bachelor's degree in Electrical Engineering.
• Master's degree in Power Electronics preferred.

Experience

• 5+ years of experience in power electronics, power supply design, applications engineering, or related field.
• Experience supporting customers in a technical role preferred.

Technical Skills

• Strong understanding of:
  • AC-DC power supplies
  • DC-DC converters
  • Flyback, Forward, LLC, Half-Bridge, Full-Bridge topologies
  • Power Factor Correction (PFC)
  • PoE (IEEE 802.3af/at/bt)
  • Battery charging systems
  • Si, SiC, and GaN power devices
  • Thermal design and management
  • EMC/EMI compliance
• Proficiency with:
  • Oscilloscopes
  • Power analyzers
  • Electronic loads
  • Network analyzers
  • Spectrum analyzers
  • Thermal test equipment
• Experience using:
  • LTspice
  • PSpice
  • MATLAB/Simulink
  • Power electronics simulation tools

Desired Qualifications

• Experience with PoE systems and Ethernet power delivery.
• Familiarity with UL, IEC, FCC, CE, and Energy Efficiency standards.
• Knowledge of digital power control techniques.
• Experience supporting global customers and manufacturing teams.
• Understanding of reliability analysis, MTBF calculations, and design verification methods.

Key Competencies

• Strong analytical and troubleshooting skills
• Excellent customer communication skills
• Technical presentation capability
• Project management and organizational skills
• Ability to work independently
• Team-oriented and collaborative mindset
• Willingness to travel as required

Benefits Include:

• Medical, dental, and vision insurance
• 401(k) retirement plan with company contribution
• Paid vacation and holidays
• Professional development and training opportunities
• Employee assistance programs
• Flexible work arrangements where applicable

Equal Opportunity Employer

We are an Equal Opportunity Employer committed to creating an inclusive workplace where all employees are treated with dignity and respect. Employment decisions are based on qualifications, merit, business needs, and job-related criteria.

We provide equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, gender identity or expression, sexual orientation, national origin, age, disability, veteran status, marital status, genetic information, or any other status protected by applicable federal, state, or local laws.

We are committed to fostering a diverse workforce and encourage qualified candidates from all backgrounds to apply