ROHM Solution Simulator

Hands-on User’s Manual Rev.2

February, 2020

© 2020 ROHM Co.,Ltd.

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ROHM Solution Simulator Hands-on
Choose Simulation Circuit

Execute Simulation
Customize Simulation
Export Schematics
Order Samples© 2020 ROHM Co.,Ltd.

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Where will you find ROHM Solution Simulator 1/3

1.Link from ROHM Web Top Page

‘Design Support Tools’> ‘ROHM Solution Simulator’© 2020 ROHM Co.,Ltd.

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Where will you find ROHM Solution Simulator 2/3

2. From ‘Technical Support’ pull-down‘Technical Support’> ‘Design Support’> ‘Simulation/Calculation Tools’> ‘ROHM Solution Simulator’© 2020 ROHM Co.,Ltd.

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Where will you find ROHM Solution Simulator 3/3

3. From Product Pages

Link to the corresponding simulation
schematics under TOOLS Tab© 2020 ROHM Co.,Ltd.

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ROHM Solution Simulator Page (1/2)
Simulation schematics are categorized and you can choose
one from the menu of a variety of circuit topology

Simulation schematic information
Initiate simulator

As an example, “Buck Converter Vo=250V
Io=20A” from DC-DC Converter is chosen© 2020 ROHM Co.,Ltd.

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ROHM Solution Simulator Page (2/2)

Login to My ROHM Account
回路を選択

to initiate ROHM Solution Simulator© 2020 ROHM Co.,Ltd.

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ROHM Solution Simulator Hands-on
Choose Simulation Circuit

Execute Simulation
Customize Simulation
Export Schematics
Order Samples© 2020 ROHM Co.,Ltd.

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Execute Simulation• Learn ROHM Solution Simulator through the cases• Open Schematics on the simulator• User interface and basic operations• Simulation setup and simulate• Simulation result and waveforms• How to use the Wavebox• How to use the Waveform Viewer© 2020 ROHM Co.,Ltd.

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Open Schematics on the simulator 1/2
The schematic image shows up when login to My
ROHM AccountClick the icon in yellow
to initiate the simulator

Starting Simulator© 2020 ROHM Co.,Ltd.

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Open Schematics on the simulator 2/2
ROHM Solution Simulator User Interface
Refer to the link for the description ofschematic and simulation setup
Schematic Toolbar

Schematic Field
Wavebox

Waveform Viewer Icon
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User interface and basic operation(1/4)

Schematic Toolbar icon and functions
Zoom In
Undo

Zoom OutRedo

Zoom to Fit

Schematic Toolbar

Design Settings

Enter Fullscreen ModeHelp

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User interface and basic operation(2/4)
Zoom in/out

Zoom to Fit• Click Zoom in or out.

• Click Zoom to Fit.

• Mouse wheel or touch pad work
Mouse wheel
2finger swipe
on touch pad© 2020 ROHM Co.,Ltd.

Zoom In

Zoom Out

Up

Down

Down

Up

Fit entire schematics andWaveboxes to screen

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User interface and basic operation(3/4)

Drag schematics

Full screen mode

Click on the schematic field• Go full screen
Drag the cursor to move the schematic
drawings. The mouse cursor willchange while dragging the schematic.
• Leave full screen••© 2020 ROHM Co.,Ltd.

Move mouse to top, and thisicon shows up. Click it to leave
full screen.
ESC Key does the same
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User interface and basic operation（4/4）
Design Settings• Change visibility of schematic label

Show All Labels© 2020 ROHM Co.,Ltd.

Show Chosen Labels

Hide all labels

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Simulation setup and execution (1/3)
Click Run to simulate© 2020 ROHM Co.,Ltd.

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Simulation setup and execution (2/3)
Run / Terminate simulation• Bar graph indicates progress• Waveform will be refreshedwhen simulation done

• Interrupt simulation• Cannot resume

Restrictions•••

Fixed schematics, no connection change or adding component
Able to change designated component constant, or to swap
power device
Maximum simulation time 60 minutes© 2020 ROHM Co.,Ltd.

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Simulation setup and execution (3/3)
Simulation setup

Note:
Simulation setup is predefined in the schematics.

Simulation Type（do not change）
・Time-Domain (transient analysis)
・Frequency-Domain（frequency analysis）

End Time：Simulation time

Advanced Options：
Accuracy and speed trade-off option

Manual Options：
Condition descriptions

Simulation Status：
Simulation logs
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Simulation result and waveforms
You can display waveforms of designated connection nodes
or components using viewer tools.

• Display waveforms• Waveform analysis• Export waveforms (csv files)

How to use Wavebox

How to use Waveform Viewer© 2020 ROHM Co.,Ltd.

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How to display waveforms• Probe signals of the nodes or components on the schematics• Use Wavebox and Waveform Viewer to display waveforms
Wavebox

Waveform Viewer

・Shows waveform where the probe
icon is placed

•
•
•
•

© 2020 ROHM Co.,Ltd.

Multiple waveforms in a window
Waveform analyzers
Compare waveforms
Generate a link to Waveform Viewer

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You can display waveforms of designated connection nodes
or components using viewer tools.
• Display waveforms• Waveform analysis• Export waveforms (csv files)

How to use Wavebox

How to use Waveform Viewer© 2020 ROHM Co.,Ltd.

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How to use Wavebox (1/10)(Case #1) Indicate the waveform of Inductor u1
current i(p1)• Place Wavebox at u1• Indicate current i(p1)• i(terminal) represent thecurrent through the terminal
p1

p2

i

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How to use Wavebox (2/10)
How to place / delete Wavebox?
Click waveform probe icon, dragcursor to a wire or over acomponent, and click

Click x mark to delete Wavebox<Tips>• Replace probe then Wavebox
renews waveforms at the location• Free to move Wavebox in theschematic field<Tips>• Grab the corner of Wavebox tochange its size

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How to use Wavebox (3/10)
How to show a waveform in Wavebox
Probe on a wire > voltage© 2020 ROHM Co.,Ltd.

Probe on a component>chose a signal from the pull-down

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How to use Wavebox (4/10)
Zoom in / Zoom out waveforms
Zoom In：
Drag mouse in desired area

© 2020 ROHM Co.,Ltd.

Zoom Out：
Right click > ‘View All’

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How to use Wavebox (5/10)(Case #2) Display the waveform of xSCT3080KL1 VGS

VGS© 2020 ROHM Co.,Ltd.

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How to use Wavebox (6/10)
Differential probe with Wavebox
Probe xQ1 gate to open Wabebox

Right click on the graph area
> ‘Display’ > ‘net13-net75’

Drag & drop the probe icon at left
bottom of window to the xQ1 source© 2020 ROHM Co.,Ltd.

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How to use Wavebox (7/10)
Display two waveforms in a Wavebox

Display > Dual Trace© 2020 ROHM Co.,Ltd.

Display > Overlaid

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How to use Wavebox (8/10)

Add Cursor：Right click on
Waveform > Add Cursor

Move Cursor: Put mouse over the
cursor, drag it to moveOr

Right click on the cursor >Set X Value> input value© 2020 ROHM Co.,Ltd.

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How to use Wavebox (9/10)

Delete Cursor: Right Click on Cursor > Delete© 2020 ROHM Co.,Ltd.

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How to use Wavebox (10/10)
Download waveform in CSV file format
Right Click on a Wavebox > Download Waveforms© 2020 ROHM Co.,Ltd.

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You can display waveforms of designated connection
nodes or components using viewer tools.
• Display waveforms• Waveform analysis• Export waveforms (csv files)

How to use Wavebox

How to use Waveform Viewer© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (1/11)
Basic operations
Display Waveform Viewer

Display in a separate window

Hide Waveform Viewer

Merge viewer to the original
window© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (2/11)
Waveform Viewer Window
Simulation Results
List of wires andcomponents in the
Schematics

Waveform Analyzer

Previous simulationdata© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (3/11)(Case #3) Display the inductor u1 current i(p1),xQ1 source voltage net75 and output voltage net68
waveforms respectively in the Waveform Viewer• Display Waveform Viewer• Choose the signals from Simulation Results, and display
waveforms in the Waveform Viewer© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (4/11)
1. Drag ‘net75’ signal from Simulation Result and drop it on the grapharea to display the waveform.

Corresponding connection ishighlighted when mouse over
to a signal name
2. The waveform will be displayed© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (5/11)
3. Add net68 waveform. Drop the signal outside of a graph area toseparate waveforms (shown below), or drop it on the designatedgraph area to overlay waveforms.

4. Add i(p1) of the Inductor u1, and display the waveforms as follows.
i(p1)
net68
net75
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How to use Waveform Viewer (6/11)
Zoom In / Zoom Out:- Same as Wavebox’s operations© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (7/11)
Delete a waveform
Right click on a signal name to bedeleted > ‘Delete Waveform’© 2020 ROHM Co.,Ltd.

Delete all waveforms
Right click > ‘Clear Window’

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How to use Waveform Viewer (8/11)(Case #4) Measure toggle frequency of the net75
signal using Waveform Analyzer
•
•
•
•
•

Open Waveform Viewer
Display net75 signal waveform
Initiate Waveform Analyzer
Choose ‘Frequency’ from ’Time’ tab
Select net75 from the drop-box and measure the frequency© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (9/11)
Use Waveform Analyzer• Initiate Waveform Analyzer＜Variety of analysis/calculation menu>• Click x on top /right corner to end© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (10/11)
Measure signal frequency with Waveform Analyzer

1. Select function‘Time’ tab > ‘Frequency’

3. Apply

2. Select a signal from pull-down© 2020 ROHM Co.,Ltd.

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How to use Waveform Viewer (11/11)
Share the Waveform Viewer to others
1. Use the Waveform Viewer in a single window
2. Display URL: Click Share Viewer icon > Display the URL

3. Copy the URL and paste to another browser• Anyone can see the waveformwith the URL© 2020 ROHM Co.,Ltd.

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ROHM Solution Simulator Hands-on
Choose Simulation Circuit

Execute Simulation
Customize Simulation
Export Schematics
Order Samples© 2020 ROHM Co.,Ltd.

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Customize Simulation (1/5)（Case #5) Change the PWM frequency and run simulation.
Compare the simulation result before/after the change.

• Change PWM-1H switching frequency (FSW) from 50KHz to
25kHz• Run simulation• Compare the net75 frequency using the Waveform Analyzer© 2020 ROHM Co.,Ltd.

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Customize Simulation (2/5)
Component shown in blue has variable parameters
You can run simulation with different circuit parameters• You can change component properties•© 2020 ROHM Co.,Ltd.

You can swap power devices

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Customize Simulation (3/5)
How to change parameters： Property Editor
Open Property Editor:
Double click a component, orRight click on a component > ‘Properties’

Change properties:
Properties in white can bechanged.

Properties in gray cannot bechanged.
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Customize Simulation (4/5)
You will see instruction how to change
properties when mouseover.

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Customize Simulation (5/5)
How to swap power devices:• You will find alternative choices of transistors or diodes on theproperty editor if available, and can easily evaluate device
characteristics with the same circuit topology.

Change properties:
Select one from pull-down© 2020 ROHM Co.,Ltd.

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Compare Simulation Results before/after
1. Change parameters
2. Run Simulation
3. Open the Waveform Viewer
4. Display net75 waveform from 1st run and 2nd run of simulation
5. Measure frequencies with the waveform analyzer

1st run

2nd run© 2020 ROHM Co.,Ltd.

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ROHM Solution Simulator Hands-on
Choose Simulation Circuit

Execute Simulation
Customize Simulation
Export Schematics
Order Samples© 2020 ROHM Co.,Ltd.

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Export Schematics to SystemVision® Cloud (1/2)• You will need to change the schematic connections or
parameters of a given simulation circuit on the website. To doso, you can export schematics to SystemVision®Cloud, andedit schematics as you like.

Click ‘Edit in systemVision.com’
To open SystemVision®Cloud• For more details about SystemVision®Cloud, please visit
https://www.systemvision.com.
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Export Schematics to SystemVision® Cloud (2/2)
If you have SystemVision®Cloud account, you will see the schematics inyour SystemVision®cloud simulator. You can change schematicconnection or device properties.
You need to save the schematic to one of your workgroups with ‘SaveAs’
to run simulation.

© 2020 ROHM Co.,Ltd.

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ROHM Solution Simulator Hands-on
Choose Simulation Circuit

Execute Simulation
Customize Simulation
Export Schematics
Order Samples© 2020 ROHM Co.,Ltd.

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Order Samples (1/2)
How to order samples:
You will find links to the corresponding product page, datasheet and thesample order page in ‘More Info’
Right click > ‘More Info’
More Info window will show up

Model Descriptions

Product Page

Product Datasheet

Sample Order Page

© 2020 ROHM Co.,Ltd.

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Order Samples (2/2)
Link to distributors:

Click ‘Link to Buy’•

Please find your distributor from the Order Sample page.

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Rev.

2

Date

Changes

February 26th, 2020

New release© 2020 ROHM Co.,Ltd.

Comments

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Caution
1. The information written in this material regarding the software and system (hereinafter collectively “Software” ) and the contents written in thismaterial are the ones at the time of this materialʼ s issuance, and may be changed without prior notice.
2. Although ROHM always strives to improve the quality and reliability, the semiconductor products may break or malfunction caused by various
factors. Should the Software and ROHM products using the Software (such ROHM products are hereinafter called “Product” ) break or
malfunction, please secure the safety, including but not limited to derating, reductant design, fire spread prevention, backup, and/or fail safe etc.
in order to prevent the accident resulting in injury or death and/or fire damage etc. as the influence of such break or malfunction. In case of theuse beyond the rated value, or the non-compliance with precaution for use, ROHM shall not owe any responsibility.
3. ROHM shall not guarantee that, regarding the Software and/or the information written in this material, there is no infringement of the third
partiesʼ intellectual property rights and any other rights. Accordingly, ROHM shall not owe any responsibility for such infringement of rights.
4. ROHM shall not, regarding the information written in this material, license to the customers by this material expressly nor impliedly
the implementation or utilization of the intellectual property rights or any other rights owned or managed by ROHM or a third party.
5. Although ROHM has made this material aiming at accuracy and carefully, ROHM shall not guarantee that there is no error. Should the error of
the contents written in this material cause the damages of the customers or a third party, ROHM shall not owe any responsibility.
6. ROHM shall not owe any responsibility for any direct and/or indirect damage to the customers (including the damage caused by loss ofintangible
asset such as information, data, or program etc., loss and/or interruption of profit) which is caused by the use or impossibility to use of
the Software.
7. Since the Software, this material, and/or the Product contain the ROHMʼ s confidential information, technical information, and/or trade secret,
ROHM definitely declines the following acts in whole or part without ROHMʼ s prior written approval:(i) disclosing to a third party;(ii) disassemble, reverse engineering, and/or any other analysis;(iii) reprinting, copy, and/or reproduction; or(iv) removing the copyright notice included in the Software.
8. In case the customer considers using the Product or the Software for the equipment or device (such as the medical equipment, transportationequipment, traffic equipment, aerospace equipment, nuclear power control equipment, the vehicle equipment including the fuel control system
and/or car accessories, and/or the various kinds of safety devices etc.) which require extremely high reliability, and whose breakdown or
malfunction relate to the risk or damage to the personʼ s life or body, or any other serious damage (such usage is hereinafter called“Special Usage” ), please consult with the ROHMʼ s sales counter. In relation to the damage etc. caused by using for Special Usage without
ROHMʼ s prior written approval, incurred by the customer or a third party, ROHM shall not owe any responsibility.
9. The customers shall guarantee to exempt ROHM and ROHMʼ s officers and/or employees from responsibility, and hold them harmless, andprotect them from any damage, from the loss, penalty, or cost caused by the claim of damage compensation (including but not limited tothe attorney fees) resulting from, or incurred relating to the following customerʼ s acts:(1) the infringement of the third partyʼ s rights or the law offence caused by reading, download, encryption, summarization, copy,
or transfer etc.; or(2) violation of this material.
© 2020 ROHM Co.,Ltd.

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© 2020 ROHM Co.,Ltd.