C-006. DC-DC Buck Converter Vo=250V, Io=20A
ROHM Solution Simulator Schematic Information
Simulation Parameters2023. Feb
64UG123E Rev.004

Simulation Circuit

Component
nameComponent

Default

Vin1

Input voltage

800VdcVo

Output voltage

250VdcIo

Output current

20Adc

fsw

Switching frequency

50kHz

Tj

Temperature

100°C

Vd1

Gate Drive voltage H

18V

Vdin

Signal voltage level

5V

Simulation
Setting RangeIL
L1

10k – 300kHz

Id
10 – 20V

Iin

Q1

If
D1

Vin1

IoVo

C2
C1

Ro

DevicesComponent
Name

Component

Default

Q1

SiC MOSFETSelectable

D1

SiC SBD

Selectable

GD-IC1Gate Driver

BM61S41RFV-C

R sink1

Resistor for sink

ESR18 2Ω

0.1 -R source1

Resistor for source

ESR18 5Ω

0.1 -L1

Inductor

200µH

10µH - 2mH

C1

Capacitor

10µF

10µF - 1mF

C2Capacitor

20pF

1pF - 1nF

Ro

Output Resistor{Vo/Io}© 2022 ROHM Co., Ltd.

Simulation
Setting Range
R sink1

GD-IC1R source1

Vd1

fsw
Vdin

Note: The Loss_calc component is a utility module to support power loss calculation and does not affect the simulation
P. 1
results of circuit operation or performance.

C-006. DC-DC Buck Converter Vo=250V, Io=20A
ROHM Solution Simulator Schematic Information
Selectable Devices

2023. Feb
64UG123E Rev.004

Selectable Devices

Component
nameComponent

Product No.

featureComponent
nameComponent

Product No.

featureQ1

SiC MOSFETSCT2080KE

1200V, 80mΩ, 40A

D1

SiC SBD

SCS205KG

1200V, 5A

SCT2120AF

650V, 120mΩ, 29A

SCS206AG

650V, 6A

SCT2160KE

1200V, 160mΩ, 22A

SCS208AG

650V, 8A

SCT2280KE

1200V, 280mΩ, 14A

SCS210AG

650V, 10A

SCT2450KE

1200V, 450mΩ, 10A

SCS210KG

1200V, 10A

SCT2750NY

1700V, 750mΩ, 6A

SCS212AG

650V, 12A

SCT2H12NZ

1700V, 1150mΩ, 3.7A

SCS215AG

650V, 15A

SCT3017AL

650V, 17mΩ, 118ASCS215KG

1200V, 15A

SCT3022AL

650V, 22mΩ, 93A

SCS220AG

650V, 20A

SCT3022KL

1200V, 22mΩ, 95A

SCS220KG (*)

1200V, 20A

SCT3030AL

650V, 30mΩ, 70A

SCS302AHG

650V, 2A, High surge resistance

SCT3030KL

1200V, 30mΩ, 72A

SCS304AHG

650V, 4A, High surge resistance

SCT3040KL

1200V, 40mΩ, 55A

SCS306AHG

650V, 6A, High surge resistance

SCT3060AL

650V, 60mΩ, 39A

SCS308AHG

650V, 8A, High surge resistance

SCT3080AL

650V, 80mΩ, 30A

SCS310AHG

650V, 10A, High surge resistance

SCT3080KL (*)

1200V, 80mΩ, 31A

SCS312AHG

650V, 12A, High surge resistance

SCT3105KL

1200V, 105mΩ, 24A

SCS315AHG

650V, 15A, High surge resistance

SCT3120AL

650V, 120mΩ, 21A

SCS320AHG

650V, 20A, High surge resistance

SCT3160KL

1200V, 160mΩ, 17A* Default device* Default device© 2022 ROHM Co., Ltd.

Note) We have not been able to confirm operation with all combinations. Please read the disclaimer carefully.

P. 2

Simulation Waveform 1ROHM Solution Simulator Schematic Information
Io, Id, IL (0～2.00ms)

Vin=800V Vo=250V
Io=20A Tj=100℃

Io, Id, If, IL （1.93ms～2.00ms）

2023. Feb
64UG123E Rev.004

Io, Id(A)Io, Id(A)Orange : Io(A)Orange : Io(A)Green : Id(A)(1.93～2.00ms)

Green : Id(A)

If(A)

IL(A)

Purple : If(A)Blue : IL(A)IL(A)© 2022 ROHM Co., Ltd.

Blue : IL(A)P. 3

Simulation Waveform2
ROHM Solution Simulator Schematic Information
Q1_Loss, Pd, Vds, Id

Loss(mJ)© 2022 ROHM Co., Ltd.

Conduction Loss

2023. Feb
64UG123E Rev.004

Loss(mJ)

Switching Loss(off)Switching Loss(on)Vin=800V Vo=250V
Io=20A Tj=100℃

Loss(mJ)

Loss(mJ)

D1_Loss, Pd, Vf, If

Vin=800V Vo=250V
Io=20A Tj=100℃

Pd(W)

Pd(W)

Vds(V)

Vf(V)

Id(A)

If(A)

P. 4

Efficiency, Power Dissipation 1
ROHM Solution Simulator Schematic Information

100

Efficiency (%)

Efficiency ( %)989694909694

90

50
40400

Pd(W)

500

600

700

80090050

Power Dissipation

Q13020100300

0Power Dissipation (W)300Power Dissipation (W)Efficiency : 100×Po/Pin

9292© 2022 ROHM Co., Ltd.

Vin=800V Vo=250V
Tj=100℃

Efficiency (%)

98

Efficiency : 100×Po/Pin

Efficiency ( %)100

Po : 1.25kW～5.00kW

Vo=250V Io=20A
Tj=100℃

Vin : 400V～800V

2023. Feb
64UG123E Rev.004

D11Pd(W)2345656Power Dissipation

4030

Q120

Ｄ1

100400500

600
Vin (V)

700

800

9000123
Po (kW)4P. 5

Efficiency, Power Dissipation 2
ROHM Solution Simulator Schematic Information

100100Efficiency (%)

9896949296949050200Pd(W)40300

400500-4050

Power Dissipation
Power Dissipation (W)100Power Dissipation (W)Efficiency : 100×Po/Pin

9290

Q130

D12010-200Pd(W)20406080100120140100120140

Power Dissipation

40Q130

Ｄ1201000100© 2022 ROHM Co., Ltd.

Vin=800V Vo=250V
Io=20A

Efficiency (%)

98

Efficiency : 100×Po/Pin
Efficiency ( %)Efficiency ( %)Tj : -25℃～125℃

Vin=800V Io=20A
Tj=100℃

Vo : 200V～400V

2023. Feb
64UG123E Rev.004

200300Vo (V)400

500-40-20020406080Tj (℃)

P. 6How to change the devices

ROHM Solution Simulator Schematic Information
2023. Feb
64UG123E Rev.004

Right-click on the device© 2022 ROHM Co., Ltd.

Select Properties

Pull down “SpiceLib Part”

Select the productP. 7

Loss Calculation Model

ROHM Solution Simulator Schematic Information

Loss Calculation Model outputs the instantaneous value of power loss and its integration.

Loss calculation model ‘Loss_calc’

2023. Feb
64UG123E Rev.004

Waveform example

Vds of MOSFET

Id of MOSFET

Vgs of MOSFET

𝑙𝑜𝑠𝑠_𝑜𝑢𝑡 𝑡 = 𝐼 𝑡 × 𝑉 𝑡𝑡

loss_out

𝑙𝑜𝑠𝑠_𝑖𝑛𝑡𝑒𝑔_𝑜𝑢𝑡 = න 𝑙𝑜𝑠𝑠_𝑜𝑢𝑡 𝑡 𝑑𝑡
0

loss_integ_out

I : Current through p1 to p1s
V : Voltage between p1s and p2© 2022 ROHM Co., Ltd.

P. 8

NoticeNotes
1) The information contained herein is subject to change without notice.
2) Before you use our Products, please contact our sales representative and verify the latest specifications :3) Although ROHM is continuously working to improve product reliability and quality, semiconductors can break down and malfunction due to various factors.
Therefore, in order to prevent personal injury or fire arising from failure, please take safetymeasures such as complying with the derating characteristics, implementing redundant andfire prevention designs, and utilizing backups and fail-safe procedures. ROHM shall have noresponsibility for any damages arising out of the use of our Poducts beyond the rating specified byROHM.
4) Examples of application circuits, circuit constants and any other information contained herein areprovided only to illustrate the standard usage and operations of the Products. The peripheral
conditions must be taken into account when designing circuits for mass production.
5) The technical information specified herein is intended only to show the typical functions of andexamples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly,any license to use or exercise intellectual property or other rights held by ROHM or any otherparties. ROHM shall have no responsibility whatsoever for any dispute arising out of the use ofsuch technical information.
6) The Products specified in this document are not designed to be radiation tolerant.
7) For use of our Products in applications requiring a high degree of reliability (as exemplifiedbelow), please contact and consult with a ROHM representative : transportation equipment (i.e.
cars, ships, trains), primary communication equipment, traffic lights, fire/crime prevention, safety
equipment, medical systems, servers, solar cells, and power transmission systems.
8) Do not use our Products in applications requiring extremely high reliability, such as aerospaceequipment, nuclear power control systems, and submarine repeaters.
9) ROHM shall have no responsibility for any damages or injury arising from non-compliance withthe recommended usage conditions and specifications contained herein.
10) ROHM has used reasonable care to ensure the accuracy of the information contained in thisdocument. However, ROHM does not warrants that such information is error-free, and ROHM
shall have no responsibility for any damages arising from any inaccuracy or misprint of suchinformation.
11) Please use the Products in accordance with any applicable environmental laws and regulations,such as the RoHS Directive. For more details, including RoHS compatibility, please contact aROHM sales office. ROHM shall have no responsibility for any damages or losses resulting
non-compliance with any applicable laws or regulations.
12) When providing our Products and technologies contained in this document to other countries,
you must abide by the procedures and provisions stipulated in all applicable export laws andregulations, including without limitation the US Export Administration Regulations and the Foreign
Exchange and Foreign Trade Act.
13) This document, in part or in whole, may not be reprinted or reproduced without prior consent ofROHM.

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R1102B