Learn Know-how
About the ROHM Solution Simulator
2021.11.10
Points of this article
・The ROHM Solution Simulator is a web-based simulation tool that can be used simply by registering with MyROHM.
・The ROHM Solution Simulator is provided with a library containing numerous Solution Circuits, focusing on often-used circuits, and is highly useful for rapid application development.
・The ROHM Solution Simulator runs on Mentor Graphics' "PartQuest™ Explore" simulation platform, so that a user having an PartQuest™ Explore account can use simulation data in his own PartQuest™ Explore environment.
The “ROHM Solution Simulator”, an electronic circuit simulation tool, is here summarized, and usage is explained. Should there be a need to quickly learn the method of use and the like, the “Hands-On User’s Manual（PDF）” should be utilized.
About the ROHM Solution Simulator
The ROHM Solution Simulator is an electronic circuit simulation tool that runs on ROHM’s public website, and is one among many various support tools provided by ROHM, which include SPICE models and thermal models as well as various application notes and other documents (see the links at the end). The ROHM Solution Simulator can be used free of charge upon user registration with MyROHM on the ROHM website.
A wide range of simulations can be performed on the web, from the initial stages of development such as component selection and individual device verification through to the system-level verification stage. ROHM power devices such as SiC MOSFETs and their driving ICs, as well as power supply ICs and other devices can be tested easily in solution circuits that approximate actual environments.
The ROHM Solution Simulator is provided in advance with a library of numerous “Solution Circuits”, mainly circuits that are widely used. At present there are two categories, “Power Device Solution Circuits” and “ICs Solution Circuits”; using Solution Circuits in these categories, verification and optimization of design circuit operation advance rapidly, and the man-hours required for application development can be reduced dramatically.
Moreover, the ROHM Solution Simulator runs on the “PartQuest™ Explore” simulation platform of Mentor Graphics Corp., a major company in the electronic design automation software industry with an extensive track record in the automotive industry. Hence a user with an PartQuest™ Explore account can embed simulation data executed in the ROHM Solution Simulator into his own PartQuest™ Explore environment (workspace), making possible flexible customization and circuit verification.
Major ROHM Support Tools
ROHM Solution Simulator
SiC Support Page
List of SPICE Models
List of Thermal Models
List of Application Notes
Applications (Excerpts related to power devices)
- Super Junction MOSFET：Benefits given by R60xxJNx series for the Phase-Shift Full-Bridge
- Super junction MOSFET：Double-pulse test substantiated advantages of PrestoMOS™
- Super junction MOSFET：On Temperature Derating in the Safe Operating Area (SOA)
- IGBT：New Gen 3 650V IGBT
- Silicon diode：Advantages of PMDE Compact Package with High Heat Dissipation for Automotive Schottky Barrier Diodes
Learn Know-how
Electrical Circuit Design
- Soldering Techniques and Solder Types
- Seven Tools for Soldering
- Seven Techniques for Printed Circuit Board Reworking
-
Basic Alternating Current (AC)
- AC Circuits: Alternating Current, Waveforms, and Formulas
- Complex Numbers in AC Circuit
- Electrical Reactance
- What is Impedance? AC Circuit Analysis and Design
- Impedance Measurement: How to Choose Methods and Improve Accuracy
- Impedance Matching: Why It Matters for Power Transfer and Signal Reflections
- Resonant Circuits: Resonant Frequency and Q Factor
- RLC Circuit: Series and Parallel, Applied circuits
- What is AC Power? Active Power, Reactive Power, Apparent Power
- Power Factor: Calculation and Efficiency Improvement
- What is PFC?
- Boundary Current Mode (BCM) PFC: Examples of Efficiency Improvement Using Diodes
- Continuous Current Mode (CCM) PFC: Examples of Efficiency Improvement Using Diode
- LED Illumination Circuits：Example of Efficiency Improvement and Noise Reduction Using MOSFETs
- PFC Circuits for Air Conditioners：Example of Efficiency Improvement Using MOSFETs and Diodes
-
Basic Direct Current (DC)
- Ohm’s Law: Voltage, Current, and Resistance
- Electric Current and Voltage in DC Circuits
- Kirchhoff’s Circuit Laws
- What Is Mesh Analysis (Mesh Current Method)?
- What Is Nodal Analysis (Nodal Voltage Analysis)?
- Thevenin’s Theorem: DC Circuit Analysis
- Norton’s Theorem: Equivalent Circuit Analysis
- What Is the Superposition Theorem?
- What Is the Δ–Y Transformation (Y–Δ Transformation)?
- Voltage Divider Circuit
- Current Divider and the Current Divider Rule
Thermal design
-
About Thermal Design
- Changes in Engineering Trends and Thermal Design
- A Mutual Understanding of Thermal Design
- Fundamentals of Thermal Resistance and Heat Dissipation: About Thermal Resistance
- Fundamentals of Thermal Resistance and Heat Dissipation: Heat Transmission and Heat Dissipation Paths
- Fundamentals of Thermal Resistance and Heat Dissipation : Thermal Resistance in Conduction
- Fundamentals of Thermal Resistance and Heat Dissipation : Thermal Resistance in Convection
- Fundamentals of Thermal Resistance and Heat Dissipation : Thermal Resistance in Emission
- Thermal Resistance Data: JEDEC Standards, Thermal Resistance Measurement Environments, and Circuit Boards
- Thermal Resistance Data: Actual Data Example
- Thermal Resistance Data: Definitions of Thermal Resistance, Thermal Characterization Parameters
- Thermal Resistance Data: θJA and ΨJT in Estimation of TJ: Part 1
- Thermal Resistance Data: θJA and ΨJT in Estimation of TJ: Part 2
- Surface Temperature Measurements: Methods for Fastening Thermocouples
- Surface Temperature Measurements: Thermocouple Mounting Position
- Surface Temperature Measurements: Treatment of Thermocouple Tips
- Surface Temperature Measurements: Influence of the Thermocouple
- Estimating TJ: Basic Calculation Equations
- Estimating TJ: Calculation Example Using θJA
- Estimating TJ: Calculation Example Using ΨJT
- Estimating TJ: Calculation Example Using Transient Thermal Resistance
- Estimation of Heat Dissipation Area in Surface Mounting and Points to be Noted
- Surface Temperature Measurements: Thermocouple Types
- Summary
- Collection of Important Points Relating to Thermal Design
Switching Noise
- Procedures in Noise Countermeasures
- What is EMC?
-
Dealing with Noise Using Capacitors
- Understanding the Frequency Characteristics of Capacitors, Relative to ESR and ESL
- Measures to Address Noise Using Capacitors
- Effective Use of Decoupling (Bypass) Capacitors Point 1
- Effective Use of Decoupling Capacitors Point 2
- Effective Use of Decoupling Capacitors, Other Matters to be Noted
- Effective Use of Decoupling Capacitors, Summary
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Dealing with Noise Using Inductors
- Frequency-Impedance Characteristics of Inductors and Determination of Inductor’s Resonance Frequency
- Basic Characteristics of Ferrite Beads and Inductors and Noise Countermeasures Using Them
- Dealing with Noise Using Common Mode Filters
- Points to be Noted: Crosstalk and Noise from GND Lines
- Summary of Dealing with Noise Using Inductors
- Other Noise Countermeasures
- Basics of EMC – Summary
Simulation
- Thermal Simulation of PTC Heaters
- Thermal Simulation of Linear Regulators
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Foundations of Electronic Circuit Simulation Introduction
- About SPICE
- SPICE Simulators and SPICE Models
- Types of SPICE simulation: DC Analysis, AC Analysis, Transient Analysis
- Types of SPICE simulation: Monte Carlo
- Convergence Properties and Stability of SPICE Simulations
- Types of SPICE Model
- SPICE Device Models: Diode Example–Part 1
- SPICE Device Models: Diode Example–Part 2
- SPICE Subcircuit Models: MOSFET Example―Part 1
- SPICE Subcircuit Models: MOSFET Example―Part 2
- SPICE Subcircuit Models: Models Using Mathematical Expressions
- About Thermal Models
- About Thermal Dynamic Model
- Summary
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About the ROHM Solution Simulator
- How to Access the ROHM Solution Simulator
- Trying Out the ROHM Solution Simulator (1)
- Trying Out the ROHM Solution Simulator (2)
- Starting a Simulation Circuit in the ROHM Solution Simulator
- ROHM Solution Simulator Toolbar Functions and Basic Operations
- ROHM Solution Simulator: User Interface
- Execution of Simulations
- Method for Displaying Simulation Results
- Simulation Result Display Tool: Wavebox
- Simulation Results Display Tool: Waveform Viewer
- Customization of Simulations
- Exporting Circuit Data to PartQuest™ Explorer
- Purchasing Samples for Evaluation
- Optimization of PFC Circuits
- Optimization of Inverter Circuits
- About Thermal Simulations of DC-DC Converters
- Circuit-Theory-Based Design Simulation