Proper Voltage

Engineer

• Lead control design for bidirectional DC/DC power conversion stages, including current and voltage loops, mode transitions, and protection behavior
• Design controls for four-switch buck-boost and multiphase interleaved converters, including feedforward and phase current balancing
• Derive small-signal plant models for buck, boost, four-switch buck-boost, and multiphase interleaved topologies
• Design PID, type II/III, 2p2z/3p3z compensators and feedforward paths
• Discretize control designs for digital implementation and specify sample rates and delay budgets
• Build closed-loop converter models in PLECS and/or MATLAB/Simulink and verify switching cells with SPICE-class tools
• Automate simulation, parameter sweeps, tolerance analysis, worst-case analysis, and stability checks using Python or MATLAB
• Run production C control code in simulation to verify firmware implementation before hardware testing
• Define operating modes, transitions, bumpless transfer requirements, protection thresholds, and response times
• Translate designs into firmware-ready specifications including block diagrams, difference equations, coefficients, scaling, limits, and expected margins
• Collaborate with firmware engineers through implementation, code review, and bench debugging
• Measure loop gain, transient response, and ripple on hardware and correlate results against models
• Contribute to hardware design reviews involving sensing, anti-aliasing filters, magnetics, and gate drive
• Serve as technical lead by establishing control design and verification practices and reviewing other engineers' work
• Author control specifications and certification evidence for UL 1973, UL 1998, and UL 9540

Explore Lead Controls Engineer – Power Electronics at Proper Voltage. Review requirements and application details.

Lead Controls Engineer – Power Electronics

Hardware Engineer

• Lead real-time control firmware for bidirectional DC/DC power conversion stages
• Implement control loops for four-switch buck-boost stages, multiphase interleaved operation, and phase current balancing
• Develop compensators, mode arbitration, scheduler/ISR architecture, and platform abstraction within a portable DC/DC control library
• Implement converter protections including cycle-by-cycle current limit, overvoltage, undervoltage, thermal derating, gate-drive fault handling, and safe-state transitions
• Verify firmware against control models through closed-loop simulation and defined-tolerance response comparison
• Architect and maintain deterministic fast-control and supervisory tasks with measured jitter and documented worst-case execution time
• Configure and validate PWM, ADC, comparator, DAC, trigger, sampling, dead-time, and protection architectures
• Measure sampling, computational, and PWM update latency on target and communicate results to the controls engineer
• Implement operating modes including constant current, constant voltage, constant power, current limit, soft-start, buck-to-boost transition, phase shedding, and charge/discharge reversal
• Bring up converter hardware in the lab through full envelope characterization, including gate-drive debugging, dead-time optimization, and shoot-through avoidance
• Support loop gain, transient response, and efficiency testing and debug model-to-hardware discrepancies
• Build on-target unit tests and hardware-in-the-loop regression infrastructure
• Author firmware specifications and certification verification evidence supporting UL 1973, UL 1998, and UL 9540
• Serve as technical lead, review control and embedded code, and contribute to hardware design reviews

Explore Lead Firmware Engineer – Power Conversion Control at Proper Voltage. Review requirements and application details.