6963 Rohm Co. Ltd.

ROHM’s Isolated DC-DC Converters for xEVs Reduce Application Size and Minimize Noise Design Countermeasures

ROHM’s Isolated DC-DC Converters for xEVs Reduce Application Size and Minimize Noise Design Countermeasures

Contributes to smaller mounting area in isolation circuit by 30% compared with standard products

Santa Clara, CA and Kyoto, Japan, Jan. 25, 2023 (GLOBE NEWSWIRE) -- today introduced the isolated flyback DC-DC converter (, ) optimized for gate drive power supplies in xEV applications, such as electric compressors and PTC heaters.

In recent years, xEVs such as hybrid and electric vehicles have become increasingly popular as the industry moves towards achieving a sustainable society. xEVs, which primarily use electricity as their energy source, are equipped with unique applications such as electric compressors for AC, and PTC heaters to raise the cabin temperature. As these applications are driven by high voltages, it is necessary to isolate the primary circuit that includes the battery from the secondary circuit comprised of the motor and other systems to ensure safety. However, in addition to issues such as larger mounting area and power consumption, conventional isolated circuit configurations require considerable noise countermeasures for switching frequencies that vary with output current.

ROHM’s new product utilizes a circuit configuration that achieves stable switching frequency characteristics without requiring a photocoupler, decreasing application size together with the workload needed for noise design countermeasures. Leveraging ROHM’s superior analog design technology allows the BD7Fx05EFJ-C to eliminate the need for photocouplers, transformer auxiliary windings, and peripheral components conventionally necessary to detect secondary-side voltage and current. Along with solving issues with photocouplers (e.g., large power consumption, fluctuating detection accuracy due to temperature, and deterioration over time), ROHM has also achieved greater miniaturization by reducing the number of components – including the photocoupler – used for current detection by 10 (equivalent to a board area of 30%) compared to general isolated flyback power supply circuits.

The BD7Fx05EFJ-C is also equipped with an adaptive ON-time control function that fixes the switching ON time, ensuring a stable frequency of around 350kHz regardless of output power. To be complaint with the CISPR25 automotive EMC standard requires considerable noise design in the frequency range from 150kHz to 300kHz, but as ROHM’s new converters do not fall within this band, noise countermeasures can be greatly simplified. This, together with a spread spectrum function that minimizes radiated noise, contributes to reducing the number of efforts for noise design.

Going forward, ROHM will continue to develop products that contribute to greater miniaturization and lower noise by leveraging its strength in analog technology, helping to achieve a sustainable society.

Product Lineup

In addition to reducing the number of components and person-hours required for noise countermeasures, the improves application reliability by incorporating multiple protection circuits along with a function that stabilizes the output voltage. View the product specifications .

Application Examples

ROHM’s new DC-DC converter IC is ideal for gate driver power supplies that must be isolated from the battery for safety. 

  • Automotive: Electric compressors, PTC heaters, inverters
  • Industrial: Power supplies, PLC (Programable Logic Controller), inverters

Availability

  • Available now (in mass production)
  • Online distributors: , , and
  • Scheduled for release at other online distributors

Product Ordering Information

  • Part numbers: ,
  • Evaluation board part numbers:,

Attachments



Travis Moench
ROHM Semiconductor
858.625.3600
 

Heather Savage
BWW Communications
720.295.0260
 
EN
25/01/2023

Underlying

To request access to management, click here to engage with our
partner Phoenix-IR's CorporateAccessNetwork.com

Reports on Rohm Co. Ltd.

 PRESS RELEASE

ROHM’s Isolated DC-DC Converters for xEVs Reduce Application Size and ...

ROHM’s Isolated DC-DC Converters for xEVs Reduce Application Size and Minimize Noise Design Countermeasures Contributes to smaller mounting area in isolation circuit by 30% compared with standard products Santa Clara, CA and Kyoto, Japan, Jan. 25, 2023 (GLOBE NEWSWIRE) -- today introduced the isolated flyback DC-DC converter (, ) optimized for gate drive power supplies in xEV applications, such as electric compressors and PTC heaters. In recent years, xEVs such as hybrid and electric vehicles have become increasingly popular as the industry moves towards achieving a sustainable soci...

 PRESS RELEASE

ROHM’s Fourth Generation SiC MOSFETs to be Used in Hitachi Astemo’s In...

ROHM’s Fourth Generation SiC MOSFETs to be Used in Hitachi Astemo’s Inverters for Electric Vehicles Contributing to longer cruising range and smaller systems in electric vehicles both in Japan and overseas from 2025 Santa Clara, CA and Kyoto, Japan, Jan. 10, 2023 (GLOBE NEWSWIRE) -- today announced the adoption of its new fourth generation SiC MOSFETs and gate driver ICs in electric vehicle inverters from , a leading Japanese automotive parts manufacturer. As the electrification of cars rapidly advances towards achieving a decarbonized society, the development of electric powertrain ...

 PRESS RELEASE

ROHM’s New MOSFETs Contribute to Higher Efficiency and Safer Operation...

ROHM’s New MOSFETs Contribute to Higher Efficiency and Safer Operation with an Original Insulation Structure Delivering class-leading power dissipation in a compact package ideal for small, thin devices Santa Clara, CA and Kyoto, Japan, Dec. 19, 2022 (GLOBE NEWSWIRE) -- today announced they have developed a compact, high efficiency 20V N-channel MOSFET (), optimized for switching in small, thin devices, including smartphones and wearables such as wireless earbuds and other hearable equipment. In recent years, the increasing sophistication and power requirements of compact devices hav...

 PRESS RELEASE

ROHM Delivers the Industry’s Highest Rated Power Shunt Resistors in th...

ROHM Delivers the Industry’s Highest Rated Power Shunt Resistors in the 0508 Size, Contributes to Greater Miniaturization Lineup also expanded to include two updated general-purpose MCR series shunt resistors Santa Clara, CA and Kyoto, Japan, Dec. 08, 2022 (GLOBE NEWSWIRE) -- today announced they have developed the series of wide terminal shunt resistors, optimized for a variety of applications in the automotive, industrial, and consumer sectors. ROHM has also strengthened their considerable lineup with two updated general-purpose MCR series shunt resistors ( and ). In recent years,...

 PRESS RELEASE

ROHM and BASiC Semiconductor Form a Strategic Partnership

ROHM and BASiC Semiconductor Form a Strategic Partnership Contributing to the technical innovation of new energy vehicles through the development of automotive SiC power devices Santa Clara, CA and Kyoto, Japan, Dec. 01, 2022 (GLOBE NEWSWIRE) -- and Shenzhen BASiC Semiconductor today announced they have entered into a strategic partnership agreement on SiC power devices for automotive applications. A signing ceremony was held at ROHM’s headquarters in Kyoto to commemorate the occasion. Under this agreement, the two companies will leverage their respective strengths to innovate and impr...

ResearchPool Subscriptions

Get the most out of your insights

Get in touch