Toshiba has introduced an Online Circuit Simulator to streamline the design and validation of power supply and motor drive circuits by enabling real-time, browser-based simulation without dedicated software environments.
The tool is developed to address a common challenge in power electronics design—verifying circuit performance and selecting appropriate MOSFETs efficiently. Traditionally, simulation requires building a dedicated environment, sourcing device models, and configuring multiple parameters. Toshiba’s web-based simulator eliminates these steps by allowing engineers to directly configure and evaluate circuits online, significantly reducing development time and complexity.
At the core of the platform is its MOSFET-centric simulation capability. By selecting a circuit topology and defining key parameters such as input and output conditions, the simulator automatically narrows down suitable MOSFET options. Engineers can then evaluate device performance based on parameters such as drain current and on-resistance, while comparing waveform behavior and power conversion efficiency to identify components that meet target specifications.
The simulator supports a wide range of power supply circuit topologies, including AC-DC stages with power factor correction (PFC) such as Single PFC, Interleaved PFC, Totem-Pole PFC, and Semi-Bridgeless PFC. It also includes DC-DC conversion stages such as flyback, half-bridge, full-bridge, and non-isolated buck converters, covering input voltage ranges from low-voltage DC systems up to high-voltage AC-DC applications delivering up to 2000 W.
In addition to power supply design, the tool extends simulation capabilities to motor drive applications, incorporating topologies such as H-bridge circuits for brushed DC motors and 3-phase inverter configurations for brushless motors (SPMSM). This enables engineers to evaluate switching behavior, torque characteristics, and system performance within a unified simulation environment. A key feature of the platform is its flexible simulation modes. Engineers can select between a fast mode for quick operational verification and an accurate mode for detailed analysis of efficiency and waveform characteristics. This allows designers to balance simulation speed with analytical depth depending on the stage of development.
The simulator also provides advanced visualization capabilities, presenting steady-state results through waveform graphs that can be customized and compared across multiple simulation runs. By modifying circuit constants, MOSFET selections, or transformer parameters—including core size, material, and winding configuration—users can directly observe the impact on system performance.
Recent updates to the platform further enhance its design support capabilities, including the addition of PCB illustration windows for various converter topologies and expanded support for modern circuit architectures such as totem-pole PFC and multi-phase configurations. These updates strengthen the tool’s ability to bridge simulation and practical implementation by providing visual context for circuit layouts.
By integrating topology selection, device optimization, and waveform analysis into a single web-based environment, Toshiba’s Online Circuit Simulator provides a comprehensive solution for accelerating power electronics design. The platform enables engineers to validate circuit behavior, optimize component selection, and improve power conversion efficiency without the overhead of traditional simulation workflows.
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About Toshiba
Toshiba Electronic Devices & Storage Corporation develops and supplies a wide range of semiconductor and storage solutions, including discrete devices, power semiconductors, and system-level components. Its technologies support applications across automotive, industrial, and energy sectors, with a strong focus on advancing efficient and reliable power electronics design.
