industry news
Subscribe Now

ROHM’s New Ultra-High-Speed Gate Driver IC: Maximizing the Performance of GaN Devices

Class-leading* unit of nanoseconds gate drive contributes to greater energy savings and miniaturization in LiDAR applications and data centers

Santa Clara, CA and Kyoto, Japan, Nov. 08, 2023 (GLOBE NEWSWIRE) — ROHM Semiconductor today introduced the new BD2311NVX-LB gate driver IC, optimized for GaN devices, which achieves gate drive speeds on the order of nanoseconds (ns), ideal for high-speed switching. This was facilitated through a deep understanding of GaN technology and the continuing pursuit of gate driver performance. The result: fast switching with a minimum gate input pulse width of 1.25ns that contributes to smaller, more energy efficient, higher performance applications.

In recent years, improving power conversion efficiency while reducing the size of power supply units in server systems have become important factors as the number of IoT devices continues to grow. This requires further advancements in the power device sector. At the same time, LiDAR, which is used not only for autonomous driving but also for monitoring industrial equipment and social infrastructure, demands high-speed pulsed laser light to further increase recognition accuracy.

As these applications require the use of high-speed switching devices, in conjunction with the release of GaN devices, ROHM developed an ultra-high-speed gate driver IC that maximizes GaN performance. Going forward, ROHM continues to release smaller, wafer level chip scale package (WLCSP) products to support greater miniaturization.

As GaN devices are sensitive towards gate input overvoltage, ROHM has developed a unique method to suppress the gate voltage overshoots and has implemented it into this driver. In addition, the optimum GaN device can be selected by adjusting the gate resistance based on application requirements. ROHM also offers a lineup of GaN devices under the EcoGaN™ name, contributing to a sustainable society through power solutions when combined with gate driver ICs that maximize their performance. The gate driver BD2311NVX-LB with the unique gate overvoltage suppression feature, when used with ROHM’s EcoGaN products, further simplifies design and enhances application reliability.

Professor Yue-Ming Hsin, Department of Electrical Engineering, National Central University (Taiwan)
“GaN devices are expected to be materials that can demonstrate performance in the high-frequency range more than silicon. In power switching applications such as DC-DC and AC-DC converters, and in LiDAR applications, the performance of GaN devices can contribute to smaller, more energy-efficient, and higher performance applications. On the other hand, to demonstrate the performance of GaN devices, gate driver IC that enable high-speed switching while taking into account the low drive voltage of GaN HEMTs are essential. Therefore, we turned our attention to ROHM, which aims to maximize the performance of GaN devices by developing optimized gate drive technology.”

“Professor Yu-Chen Liu (National Taipei University of Technology) and Professor Chin Hsia (Chang Gung University), who are working together on the same project, tested ROHM’s driver IC, the BD2311NVX. The results showed that BD2311NVX had shorter rise time and lower ringing at 1MHz switching frequency for DC-DC converter compared to other driver ICs. The reduced rise time of this driver IC will help maximize the reduction in switching losses, which is an advantage of GaN. We are also looking forward to ROHM’s GaN solutions, which have strengths in analog technologies in power supplies and drivers.”

Product Lineup
View the product specifications here.

Application Examples

  • LiDAR drive circuits (i.e., industrial equipment, infrastructure monitoring)
  • DC-DC converter circuits in data centers, base stations, etc.
  • Wireless charging for portable devices
  • Class-D audio amplifiers and more

Online Sales Information

  • Sales launch date: September 2023
  • Online distributors: DigiKeyMouser and Farnell
    (to be offered at other online distributors as it becomes available)
  • Applicable part number: BD2311NVX-LB

Reference Designs
Reference designs for LiDAR incorporating these new products, together with ROHM’s 150V EcoGaN and high-power laser diodes, are now available on ROHM’s website: These designs can be used to reduce development load.

Reference design part numbers:

  • REFLD002-1 (Square Wave Circuit),
  • REFLD002-2 (Resonant Circuit)

Refers to ROHM’s new lineup of GaN devices that contribute to energy conservation and miniaturization by maximizing GaN characteristics to achieve lower application power consumption, smaller peripheral components, and simpler designs requiring fewer parts. EcoGaN is a trademark or registered trademark of ROHM Co., Ltd.

Professor Yue-Ming Hsin Profile

Born in Tainan, Taiwan in 1965, Dr. Hsin holds a BS from National Central University, an MS from National Chiao Tung University, and a PhD from the University of California, San Diego (Electrical Engineering). Currently a professor in the Department of Electrical Engineering at National Central University (NCU) in Taiwan, he is also an overseas editor at both Applied Physics Express (APEX) and the Japanese Journal of Applied Physics (JJAP). His research interests include the development of devices and circuits based on heterostructures and wide bandgap semiconductors.

1997:         Joined ANADIGICS, Inc., of Warren, NJ (now Coherent Corp.); developed GaAs MOSFETs and pHEMTs for wireless and fiber optic communications

1998:         Joined the faculty of Electrical Engineering at National Central University

2004-05:    Visiting Scholar, University of Illinois at Urbana-Champaign

2016-17:    Visiting Professor, University of California, Los Angeles (UCLA)

2019-22:    Director of the Center for Optical Research at National Central University (NCU)

For more information, please visit ROHM’s website:

*ROHM study, November 2023


Leave a Reply

featured blogs
Dec 8, 2023
Read the technical brief to learn about Mixed-Order Mesh Curving using Cadence Fidelity Pointwise. When performing numerical simulations on complex systems, discretization schemes are necessary for the governing equations and geometry. In computational fluid dynamics (CFD) si...
Dec 7, 2023
Explore the different memory technologies at the heart of AI SoC memory architecture and learn about the advantages of SRAM, ReRAM, MRAM, and beyond.The post The Importance of Memory Architecture for AI SoCs appeared first on Chip Design....
Nov 6, 2023
Suffice it to say that everyone and everything in these images was shot in-camera underwater, and that the results truly are haunting....

featured video

Dramatically Improve PPA and Productivity with Generative AI

Sponsored by Cadence Design Systems

Discover how you can quickly optimize flows for many blocks concurrently and use that knowledge for your next design. The Cadence Cerebrus Intelligent Chip Explorer is a revolutionary, AI-driven, automated approach to chip design flow optimization. Block engineers specify the design goals, and generative AI features within Cadence Cerebrus Explorer will intelligently optimize the design to meet the power, performance, and area (PPA) goals in a completely automated way.

Click here for more information

featured paper

3D-IC Design Challenges and Requirements

Sponsored by Cadence Design Systems

While there is great interest in 3D-IC technology, it is still in its early phases. Standard definitions are lacking, the supply chain ecosystem is in flux, and design, analysis, verification, and test challenges need to be resolved. Read this paper to learn about design challenges, ecosystem requirements, and needed solutions. While various types of multi-die packages have been available for many years, this paper focuses on 3D integration and packaging of multiple stacked dies.

Click to read more

featured chalk talk

Analog in a Digital World: TRIMPOT® Trimming Potentiometers
Sponsored by Mouser Electronics and Bourns
Trimmer potentiometers are a great way to fine tune the output of an analog circuit and can be found used in a wide variety of applications. In this episode of Chalk Talk, Patricia Moorman from Bourns and Amelia Dalton break down the what, where, how, and why of trimpots and the benefits that Bourns trimpots can bring to your next design.
Feb 2, 2023