Battery Backup Unit (BBU)
As the utilization of AI gathers momentum, high-density implementation and increases in power consumption of servers have entered a new stage. The most important challenge in designing servers is to deliver the maximum processing power within a limited rack space while balancing the stable operation and power savings of the entire system.
First, designing battery backup units (BBUs), which protect data in the event of a power supply failure, requires high-level battery management to maximize the performance of lithium-ion batteries. ROHM provides products such as remaining battery level monitoring ICs (fuel gauge ICs) that can assess even the state of health (SoH) of batteries highly precisely, contributing to downsizing and improving the reliability of the BBUs.
Furthermore, hot swap circuits that support the stable operation and ease of maintenance of servers require a high rating for the safe operation area (SOA) that can withstand large current loads. This requirement is especially strict for AI servers that use many GPUs. ROHM’s 100 V power MOSFETs combine a high SOA rating with low on-resistance, meeting these strict requirements and improving system robustness.
In addition to these solutions at a device level, ROHM provides a product portfolio that can support diversified power supply architectures from traditional 12 V/50 V systems to 400 V-class high-voltage direct-current (HVDC) power distribution racks.
Block Diagram
Battery Backup Unit 50V interface (ORV3)
*Click to enlarge image.
Battery Backup Unit 400V interface (HVDC side rack)
*Click to enlarge image.
Technical information
Topology Selection
When designing circuits, especially power circuits, it's essential to choose a circuit configuration that aligns with the required specifications, as the input/output voltages, power levels, and isolation needs will vary by application. Optimal component selection also depends on the topology. Using inappropriate components can lead to performance shortfalls, potentially requiring a complete redesign of the circuit. ROHM’s topology selection page helps users identify the most suitable devices for various circuit designs.
Reference Design
ROHM provides a system-level evaluation board (solution board) that combines ROHM's IC and discrete products. We have already solved not only the characteristics of individual products but also the problems that may occur when combining them to build a system, thus contributing significantly to the reduction of development time for our customers.
Design Model
ROHM offers simulation models, including thermal models, PLECS models, and Ray files, for circuit and thermal simulations of discretes and ICs, including power devices.
ROHM Solution Simulator
ROHM Solution Simulator is a new web-based electronic circuit simulation tool that can carry out a variety of simulations, from initial development that involves component selection and individual device verification to the system-level verification stage.
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Product-related materials
Product Longevity Program (PLP)
To ensure long-term reliability for industrial and other long-life equipment, we disclose supply periods for products covered under our Product Longevity Program.
Catalog
On this catalog page, ROHM has compiled various brochures listing our products and solutions by market, application, solution, and product.
White Paper
This white paper introduces ROHM’s comprehensive power solutions across power devices and analog ICs, with thermal design simulations, board-level design strategies, and real-world implementation examples.
Application Note
This application note page compiles practical information for immediate use in design and evaluation, including how to interpret thermal resistance and heat dissipation, as well as key precautions for temperature measurement.
- What Is Thermal Design
- Basics of Thermal Resistance and Heat Dissipation
- Method for Calculating Junction Temperature from Transient Thermal Resistance Data
- Notes for Temperature Measurement Using Thermocouples
- Two-Resistor Model for Thermal Simulation
- Notes for Temperature Measurement Using Forward Voltage of PN Junction
- What is a Thermal Model? (SiC Power Device)
- How to Use Thermal Models
- Measurement Method and Usage of Thermal Resistance RthJC
- Precautions When Measuring the Rear of the Package with a Thermocouple
Adoption ・ Collaboration Examples
Case Studies
Murata Power Solutions
5.5kW Output AI Server Power Supplies
ROHM’s EcoGaN™ contribute to improving power supply efficiency/p>
Case Studies
COSEL Co., Ltd.
3.5kW Output AC-DC Power Supply Units
ROHM's SiC MOSFETs and SBDs contribute to high efficiency power supplies
Case Studies
Murata Power Solutions
Data Power Supply Units
ROHM SiC SBDs contribute to increase performance and reduce the size of application
Collaboration Examples
ROHM and Delta Electronics Form a Strategic Partnership on Developing Power Devices for Power Supply Systems
Accelerating technological innovation in power supply systems centered on GaN power devices
Video
100V Power MOSFET for AI Servers RY7P250BM
Developed the RY7P250BM, a 100V power MOSFET that combines Wide-SOA and low on-resistance, making it ideal for hot-swap circuits in AI servers.
2-in-1 SiC Molded Modules DOT-247
The 2-in-1 SiC module ‘DOT-247,’ ideal for PV inverters, UPS systems, and semiconductor relays. It inherits the highly versatile ‘TO-247’ while delivering greater design flexibility and power density.
SiC Power Devices
ROHM has recently released SiC MOSFETs that deliver unprecedented ON resistance along with faster switching speeds.
650V GaN | Tech Explainer
ROHM EcoGaN™ power products are the answer to power supply system communication and reliability.
ROHM Super Junction MOSFETs
ROHM utilizes super junction technology for its high voltage (600V+) power MOSFETs.
Current Sensing Solutions
ROHM offers a comprehensive range of current sensing solutions, including resistive current sensing ICs along with key components like op amps, current sense amps, and shunt resistors. ROHM current sensors deliver high accuracy detection for efficient energy management. By replacing magnetic field detection types, mounting area can be significantly reduced, contributing to more compact, lightweight applications.
ROHM’s Product Longevity Program
when designing new products. This time, we will talk about ROHM’s Product Longevity Program (PLP) that addresses these concerns, allowing customers to select products with greater confidence.
