Design Models
ROHM offers various simulation models for circuit and thermal simulations of discretes and ICs, including power devices.
They can be downloaded from individual product pages or using the following links.
Circuit Simulation Models
SPICE models for circuit simulation are provided according to the simulation tools used.
| Simulation Tools | ||||
| PSpice® | Other | |||
| Discretes*1 | SPICE Model | LTspice® Model | ||
| ICs*2 | PSpice® Model | Unencrypted SPICE Model | ||
Discretes
- SPICE Model：Models compatible with PSpice®*3 and other simulation tools. Please refer to the reference documents below. The levels are classified as shown in the table.
Overview of ROHM’s Simulation Models (for ICs and Discrete Semiconductors)
New SPICE Models with ImprovedSimulation Speed for PowerSemiconductors Are Released!
| SPICE Model | ||
|---|---|---|
| ROHM Level |
Definition | Main Product Groups |
| LC | Compact model (Device Model) | Tr, Di |
| L0 | Macro model composed of compact models | Tr, Di, Si-MOSFET |
| L1 | Function-based model with high accuracy for static characteristics | Di, SiC, IGBT |
| L2 | L1 model with added RC thermal network for dynamic self-heating calculation | SiC, IGBT |
| L3 | Function-based model optimized for convergence and simulation speed | SiC, GaN |
| TN | Thermal-only model consisting of RC thermal network | Tr, Di, Si-MOSFET |
- LTspice® Model：Models for use with LTspice LTspice®*4. Please refer to the reference documents below.
How to Use LTspice® Models
How to Use LTspice® Models: Tips for Improving Convergence
ICs
- PSpice® Model：Models for use with PSpice®. Please refer to the reference documents below.
Usage of SPICE Macromodel (for LDO)
Usage of SPICE Macromodel (for DC/DC) - Unencrypted SPICE Model：PSpice unencrypted models that can be used with other simulation tools.
Please submit a request from individual product pages.
Thermal Simulation Models
We offer SPICE and PLECS® models,PSIM™ models of discretes for thermal simulations along with 2-resistor models of ICs for use with CFD tools.
| Simulation Tools | ||||
| SPICE | PLECS® | PSIM™ | CFD | |
| Discretes*1 | SPICE Thermal Model | PLECS® Model | PSIM™ Model | - |
| ICs*2 | - | - | - | Two-Resistor Model |
Discretes
- SPICE Thermal Model：Thermal simulation (Cauer) models compatible with SPICE simulation tools. Please refer to the reference documents below. The levels are classified as shown in the table.
What is a Thermal Model?
How to Use Thermal Models
Overview of ROHM’s Simulation Models (for ICs and Discrete Semiconductors)
| SPICE Model | ||
|---|---|---|
| ROHM Level |
Definition | Main Product Groups |
| LC | Compact model (Device Model) | Tr, Di |
| L0 | Macro model composed of compact models | Tr, Di, Si-MOSFET |
| L1 | Function-based model with high accuracy for static characteristics | Di, SiC, IGBT |
| L2 | L1 model with added RC thermal network for dynamic self-heating calculation | SiC, IGBT |
| L3 | Function-based model optimized for convergence and simulation speed | SiC, GaN |
| TN | Thermal-only model consisting of RC thermal network | Tr, Di, Si-MOSFET |
- PLECS® Model：Thermal Simulation models are available for PLECS®*5
- PSIM™ Model ：A thermal simulation model that can be used with PSIM™*6.
ICs
- Two-Resistor Model：Models that can be used with 3D CFD*7 thermal simulation tools such as Simcenter Flotherm™*8.
Two-Resistor Model for Thermal Simulation
How to Use the Two-Resistor Model
*A white paper containing information useful for the thermal design of power devices is also available.
4 Steps for Successful Thermal Designing of Power Devices
Other
EEPROMs
- IBIS Model：Models that can be used for transmission line simulations.
Optical Semiconductors
- Ray File：Ray File data for use in optical simulations.
※ Please note that circuit and thermal simulation models are not available for all products.
*1 Discretes refer to power devices, MOSFETs, transistors, diodes, etc.
*2 ICs refer to op amps, power management ICs, power supply ICs, etc.
*3 PSpice® is a registered trademark of Cadence Design Systems, Inc.
*4 LTspice® is a registered trademark of Analog Devices, Inc.
*5 PLECS® is . a registered trademark of Plexim, Inc.
*6 PSIM™ is a trademark of Altair®.
*7 CFD stands for Computational Fluid Dynamics.
*8 Simcenter Flotherm™ is a registered trademark of Siemens Digital Industries Software, Inc.