PowerExpert: A High-Precision Signoff Simulation Engine for Complex Power Electronics

PowerExpert is a high-precision analog/mixed-signal Sign-off simulation engine engineered for complex power electronics systems. It supports a comprehensive range of SPICE analyses, single-machine multi-core parallel processing, and compatibility with mainstream SPICE models. This article outlines its product positioning and evaluation criteria, focusing on three key areas: result credibility, scenario coverage, and model migration costs.

In our previous two articles, we discussed the structural bottlenecks emerging in the era of wide-bandgap (WBG) devices, as well as the three essential standards for evaluating power electronics simulation tools: Result Credibility, Scenario Coverage, and Model Migration Costs.

In a real-world project, these criteria address three critical engineering questions:

• Credibility: Can the engineer confidently make a "go/no-go" design decision based on the simulation results?

• Coverage: As the system scales in complexity, are critical scenarios being skipped solely due to computational limitations?

• Migration: Does the assessment of a new tool get stalled by the difficulty of migrating historical or vendor-provided models?

Does a "pretty waveform" justify a final design decision?

Take 20 seconds to understand why PowerExpert is built for the Sign-off stage.

This short video highlights the three pillars of PowerExpert’s product positioning: Result Credibility, Scenario Coverage, and Model Migration Costs.

About PowerExpert

PowerExpert is a high-precision analog/mixed-signal simulation engine designed for complex power electronics. Its core objective is to support Sign-off—the final, mission-critical validation phase before design finalization.

This positioning carries two fundamental implications. First, PowerExpert focuses beyond "generating waveforms"; it ensures that simulation results provide a robust basis for assessing power loss, stress, margins, stability, and system-level risks. Second, it is tailored for engineering teams currently in complex validation phases, where designs incorporate non-linear power devices, analog control loops, and digital logic. It is built to resolve the uncertainty often encountered in the late stages of a project, determining whether simulation results can truly serve as the final authority in the decision-making chain.

Pillar I: High-Precision Simulation – Bridging the Gap to Decision-Making

In power electronics, switching behavior, control loops, and parasitic parameters are deeply coupled. If a simulation simplifies convergence, time-stepping, or device models excessively, the waveform may still appear smooth while key performance indicators have already drifted.

Based on an enhanced SPICE algorithm, PowerExpert supports a full suite of analyses, including DC, AC, PZ, Noise, Transient, Distortion, Sensitivity, Fourier, and FFT. Its goal is to stably replicate the hybrid behavior of analog circuits and control logic under critical conditions. This allows engineers to verify:

Whether power losses are acceptable.

Whether voltage and current stress limits are breached.

Whether loop margins are sufficient.

Whether stability risks exist under worst-case scenarios.

The value of precision here lies not in a raw error percentage, but in whether the results can withstand correlation testing and serve as the foundation for project sign-off. PowerExpert has already been validated in various client projects regarding precision, convergence, and modeling flexibility.

Pillar II: Computational Efficiency – Determining Validation Depth

Simulation speed is often misconstrued as "waiting a few minutes less." For complex power electronics, it dictates the depth of validation.

When system scale increases and parameters, corners, parasitics, and fault scenarios must be repeatedly calculated, the delay of a single simulation is amplified across the entire validation matrix. If performance lags, teams are often forced to reduce scenarios, simplify models, or temporarily omit parasitics. These compromises save time in the short term but compromise the coverage of worst-case scenarios.

PowerExpert enhances solver efficiency for complex systems through adaptive time-stepping, sparse matrix optimization, and single-machine multi-core parallel processing. Ultimately, these algorithms resolve a fundamental engineering dilemma: when system complexity grows, can the team still run all the required scenarios?

Pillar III: Model Compatibility – Lowering the Barrier to Adoption

For teams with mature, established toolchains, the "Model Barrier" is the first hurdle in evaluating a new simulation tool.

If adopting a new tool requires rewriting years of accumulated model libraries, the assessment usually stops at the conceptual phase. Even if conversion is possible, the team must spend significant time re-verifying: Is the syntax correct? Were parameters lost? Does the output match the original tool?

PowerExpert addresses this by:

• Supporting mainstream SPICE syntax: It processes custom .cir models internally to minimize manual rewriting.

• Broad Device Model Support: It is compatible with BSIM3/4, PSP, HiSIM, HiSIM-HV, and more.

• Extensibility: It provides APIs and Python interfaces for batch simulation and customized secondary development.

This capability solves more than just "format support"; it allows teams to begin evaluations using their own existing models and netlists, comparing result consistency, convergence, and computational efficiency under conditions that mirror real projects. Only when model assets are fully integrated can a new tool truly enter a team's evaluation list.

Who is PowerExpert For?

PowerExpert is designed for engineering teams currently navigating complex power electronics design and tool assessment phases:

• Power Semiconductor IDMs/Fabless: Device and model development teams.

• Simulation and Sign-off Engineers: Those responsible for complex power electronics systems.

• WBG Design Teams: Engineers working with SiC, GaN, and other wide-bandgap devices.

• R&D Organizations: Teams evaluating their current commercial tools against new, high-precision alternatives.

If your team is currently satisfied with free or basic tools for small-scale functional verification, switching tools may not be your immediate priority. However, if your team is struggling with unreliable results leading to repeated rework, skipping validation scenarios due to computational costs, or failing to evaluate new tools because of legacy model migration issues, the value proposition of PowerExpert becomes clear.