"Maximizing energy conversion efficiency
for the benefit of humanity and society"
For Electric Vehicles
Isolated Step-Down
DC/DC Converter
■ Product Line-up
■ Introduction of use cases
Listen closely, look ahead,
and create a future of value.
This is an isolated DC/DC converter that converts the high-
voltage DC battery of an electric vehicle into low-voltage DC and
supplies power to the ��V power line for auxiliary equipment.
�kW DC/DC Converter
with Water-Proof
Since its founding in ����,
Shindengen Electric Manufacturing Co., Ltd.
has been cultivating power supply technologies.
Our DC/DC converters employ soft-switching circuitry for low loss and high
heat dissipation / heat dispersion technology to reduce size and weight while
increasing power capacity. In addition, full digital control using DSP enables
optimal power supply control and safety design, and also enables
communication with the upper-level ECUs.
Point Point Point
�� High Efficiency �� �� Parallel
High Reliability IP Compliant Operation
DC/DCCONVERTER
Product Line-up
Low-voltage system Input Voltage Range ��-���V
■ IP�� Compliant Output Voltage Range ��-��.�V
Output Current ��A
Output Power ���W
Cooling Type Forced Air Cooling
Size W���×D���×H��㎜*�
Weight �.�kg
Bottom View Communication CAN�.�b, ���kbps
���V system *� Connectors and fins not included.
■ For mobility used outdoors, water-cooled type meets Input Voltage Range ���-���V
waterproof needs Output Voltage Range ��-��.�V
■ Equivalent to IP��, allowing installation without location
concerns Output Current ���A
■ Water Cooling with Water-Jacket Output Power �,���W
*Installation orientation can be adjusted to suit the
environment Cooling Type Water Cooling
Size W���×D���×H��㎜*�
Weight �.�kg
Communication CAN�.�b, ���kbps
*� Connectors and Water Jacket are not included.
Bottom View
���V system
■ IP�� equivalent waterproof and dustproof standard
■ Half-bridge topology suppresses noise to the same level
as ���V systems.
■ By using a full-bridge topology, the same shape can be
used for ���V systems.
■ Conventional Si-MOSFETs deliver low cost, high reliability,
and fast mass production—without next-gen
semiconductors like SiC. Input Voltage Range ���-���V
Output Voltage Range ��-��.�V ��-��V
Output Current ���A ���A
Output Power �,���W �,���W
Cooling Type Water Cooling
Size W���×D���×H��㎜*�
���V system, �kW output
(Under Development) Weight �.�kg
Communication CAN�.�b, ���kbps
*� Connectors and Water Jacket are not included.
Introduction of Use Cases ➀
High Current System Example
Parallel-Operation
With the increase in auxiliary power due to the evolution of car electronics and the
evolution of autonomous driving technology, DC/DC converters with higher output are
also required. By using DC/DC converters capable of parallel operation, we respond to
the growing demand for auxiliary power systems.
High Voltage Batt Main DC/DC
Vehicle Load
ECU
TCU
Vehicle Load
Heater A/C,
Wiper, Lamp, etc.
Sub DC/DC
This is an example of a system in which a sub DC/DC converter is added in parallel as a
booster when a high-current converter is needed.
Distributing the auxiliary power helps prevent the wire harness and main fuse from
becoming larger, which can occur due to increased current from the DC/DC converter.
■ Output characteristics during parallel operation
This is the output current and voltage characteristic when �kW and �kW are combined
and operated in parallel. It is possible to correct the output current value of the two
converters so that they can be supplied in a balanced manner. Even if a vehicle load is
added and the required current increases, if there is a DC/DC that can operate in
parallel, it is possible to easily supply power from the sub DC/DC converter.
Cooperative Control Add-on Control
Introduction of Use Cases ➁
Redundant System Example
Redundant Operation
When configuring a fully redundant autonomous driving system, it is necessary to also
make the auxiliary power supply redundant. By using DC/DC converters, we can meet
the needs of various auxiliary power supply systems.
High Voltage Batt Main DC/DC
Vehicle Load
ECU, TCU
Autonomous ➀
Vehicle Load
Heater A/C,
Wiper, Lamp, etc.
Sub DC/DC
Vehicle Load
Autonomous ➁
EOP Autonomous Driving
Main DC/DC
Vehicle Load
ECU
TCU
Vehicle Load
Heater A/C,
Wiper, Lamp, etc.
Sub DC/DC
Vehicle Load
Battery can be removed.
Dual Battery System
Sub DC/DC Converter can be set to secure the redundancy
of the autonomous driving system.
Dedicated DC/DC Converter can be set for a 12V battery as
a sub power supply in a 24V system.
Product Inquiries
Scan the QR code
to access the inquiry form
Contact for Flyers and Catalogs
Sales Planning Sect.�, Marketing Dept, Sales Div. Group
☎���-���-����
新電元工業株式会社
https://www.shindengen.com/
Head Office Asaka Office
New-Otemachi Bldg., �-�-� �-��-� Saiwai-cho, Asaka City, Saitama
Otemachi, Chiyoda-ku, Tokyo ���-����, Japan
���-����, Japan