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 Develops Automotive Primary LDOs: Leveraging Original QuiCur Tech...

ROHM Develops Automotive Primary LDOs: Leveraging Original QuiCur Technology to Achieve Industry-Leading Load Response Characteristics Ensures stable output in automotive applications with high input voltage and significant load jumps Santa Clara, CA and Kyoto, Japan, March 14, 2024 (GLOBE NEWSWIRE) -- today announced the new series of 45V rated, 500mA output primary LDO regulators (, , , , , ). These devices are suitable for supplying power to automotive electronic components such as Electronic Control Units (ECUs) that operate from vehicle batteries. In recent years, the number o...

 PRESS RELEASE

ROHM's EcoGaN™ Adopted in the 45W Output USB-C Charger C4 Duo from Inn...

ROHM's EcoGaN™ Adopted in the 45W Output USB-C Charger C4 Duo from Innergie, a Brand of Delta Santa Clara, CA and Kyoto, Japan, Feb. 26, 2024 (GLOBE NEWSWIRE) -- today announced the adoption of its 650V GaN device (EcoGaN™) in the C4 Duo, a 45W output USB-C charger from Innergie, a brand of Delta. Delta is a global provider of IoT-based Smart Green Solutions headquartered in Taiwan. ROHM’s EcoGaN device contributes to greater application performance, reliability, and miniaturization by providing higher efficiency in power supply systems. Efforts to save energy are accelerating toward...

 PRESS RELEASE

ROHM’s New Thermal Printhead Provides Clear Printing at High Speeds, E...

ROHM’s New Thermal Printhead Provides Clear Printing at High Speeds, Even on a Single-Cell Li-Ion Battery Novel design contributes to greater miniaturization, lighter weight, and improved energy savings Santa Clara, CA and Kyoto, Japan, Feb. 21, 2024 (GLOBE NEWSWIRE) -- today introduced the thermal printhead, compatible with single Li-ion battery cell (3.6V) battery drive that achieves high performance printing while improving energy savings by approximately 30%. In recent years, the importance of payment terminals and logistics mobile label printers has continued to increase follo...

 PRESS RELEASE

ROHM’s New Schottky Barrier Diodes Achieve Class-Leading Reverse Recov...

ROHM’s New Schottky Barrier Diodes Achieve Class-Leading Reverse Recovery Time with 100V Breakdown Voltage by Adopting a Trench MOS Structure that Significantly Improves VF-IR Trade-Off Ideal for automotive LED headlamps and other high-speed switching applications Santa Clara, CA and Kyoto, Japan, Feb. 15, 2024 (GLOBE NEWSWIRE) -- today announced new 100V breakdown Schottky Barrier Diodes (SBDs) that deliver industry-leading reverse recovery time (trr) for power supply and protection circuits in automotive, industrial, and consumer applications. Although numerous types of diodes exi...

 PRESS RELEASE

ROHM Introduces Zero-Drift Operational Amplifier with High Accuracy Re...

ROHM Introduces Zero-Drift Operational Amplifier with High Accuracy Regardless of Temperature Changes 9µV input offset voltage, 0.05µV/°C temperature drift enable precise control of industrial equipment Santa Clara, CA and Kyoto, Japan, Feb. 07, 2024 (GLOBE NEWSWIRE) -- today introduced the new zero-drift operational amplifier (op amp). It is designed for industrial and consumer electronics devices and minimizes both input offset voltage and input offset voltage temperature drift. Capable of accurately amplifying output signals from sensors installed in various measurement devices, th...

ResearchPool Subscriptions

Get the most out of your insights

Get in touch