Replace server power supply unit (PSU) in server rack room

High‑Efficiency Power for Enterprise Servers

Server's power supply (PSU) is essential for powering enterprise servers and data centers. Choosing the right PSU involves careful consideration of wattage, form factor and compliance standards.

Overview

As the demand for AI workload grows, the number of servers keeps increasing while simultaneously stepping up computing capabilities. The rising number of blade servers and rack servers in small form factors to meet computing requirements leads to higher power consumption. Modern server PSUs offer high efficiency, redundancy and digital monitoring, making them ideal for AI, cloud and HPC workloads. onsemi develops innovative power supply solutions used in high-power server PSUs (800V HVDC) and other large loads while maximizing energy savings.

onsemi’s comprehensive wide-bandgap (WBG) technologies, including Silicon Carbide (EliteSiC) and vertical Gallium Nitride (vGaN), achieve superior energy efficiency, power density and thermal performance for highly efficient power supply solutions.

Products

Silicon Carbide (SiC) Cascode JFETs
Our high-performance SiC cascode JFETs deliver best-in-class switching speed, lower switching losses, and higher efficiency. They provide high switching frequency and deliver ultra-low on-resistance (RDS (on)) starting at just 5mohm, utilizing less than half the die size of any other technology. Available in both standard thru-hole (including Kelvin) and surface mount packages, they offer excellent cost-effectiveness. These devices utilize a unique cascode configuration, integrating a high-performance SiC fast JFET with a cascode-optimized Si-MOSFET. This innovative approach enables standard gate drive (0-12V) for SiC devices. Given their smaller die size and compatibility with existing driver solutions, the SiC cascode JFETs offer optimized system performance and cost structure.
Silicon Carbide (SiC) MOSFETs

Our SiC MOSFETs are designed to be fast and rugged and include system benefits from high efficiency to reduced system size and cost. MOSFETs are metal–oxide–semiconductor field-effect transistors with insulated gates. These silicon carbide MOSFETs have a higher blocking voltage and higher thermal conductivity than silicon MOSFETs, despite having similar design elements. SiC power devices also have a lower state resistance and 10 times the breakdown strength of regular silicon. In general, Systems with SiC MOSFETs have better performance and increased efficiency when compared to MOSFETs made with silicon material.

There are many advantages to choosing SiC MOSFETs over silicon MOSFETs, such as higher switching frequencies. High-temperature development is also not a concern when using SiC MOSFET modules because these devices can operate efficiently even in high heat. Additionally, with SiC MOSFETs, you benefit from a more compact product size because all components (inductors, filters, etc.) are smaller.

Low/Medium Voltage MOSFETs
Portfolio of comprehensive range of Low-medium voltage power Mosfets that delivers superior performance and reliability for switching applications. Our cutting-edge PowerTrench® T10 technology delivers industry leading RDS, higher power density, reduced switching losses and better thermal performance.
Gate Drivers
GaN, IGBT, FET, MOSFET, H-Bridge MOSFET, and SiC MOSFET inverting and non-inverting drivers ideal for switching applications.
Power Factor Controllers
Variable CRM, CCM, and DCM power factor controllers that enable power factor correction.
Offline Controllers
Offline switching controllers; including fixed-frequency flyback & forward PWM controllers, and current mode and voltage mode controllers.
Secondary Side Controllers
Secondary side, synchronous rectification controllers.
Silicon Carbide (SiC) Diodes

Our Silicon Carbide diodes use a completely new technology that provides superior switching performance and higher reliability to silicon.

Many people have been using silicon diodes in their machinery, but there is a new option for those looking for better efficiency. SiC diodes are diodes that allow for higher switching performance. They have greater power density and overall increased efficiency. Their reduced energy loss also helps to lower system costs.

Compared to silicon diodes, silicon carbide diodes are more efficient and resistant to high temperatures. They work at high frequencies and higher voltages. Since SiC diodes have faster recovery times than silicon diodes, they're ideal for any kind of current that requires a quick transition from blocking to conducting stages. They also don't get as hot as silicon, allowing them to be used in higher-temperature applications with more efficiency.

Offline Regulators
Offline, switching regulators, including current mode, voltage mode, and gated oscillator devices.

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Documents

Tutorial
Introducing Vertical GaN Tutorial
Application Notes
Choosing the Correct Semiconductor Technology for 800 V
Application Notes
EliteSiC JFET Based High Voltage Hot‐Swap Application
Reference Manuals
Vertical GaN (VGaN) Fact Sheet
White Papers
Comparing Power Supply Technologies in AI Data Centers and Telecom
Application Notes
Design of a Flyback Converter Using Source‐Switched SiC JFET
Application Notes
Paralleling SiC Cascode JFETs
Application Notes
How to Achieve 99.3% Efficiency in 3.6 kW Totem-pole PFC Using 750 V Gen 4 SiC Cascode JFETs​
White Papers
SiC Cascode JFETs: Easing the Transition from Silicon to Silicon Carbide
Tutorial
Pairing Gate Drivers to EliteSiC Tutorial
White Papers
Advantages of Integrated GaN Devices in AC-DC Solutions

Evaluation Boards/Kits

Evaluation Board
NCP1681CCM1KWGEVB
Evaluation Board
NCP1681MM500WGEVB
Evaluation Board
NCP1680CRM300WGEVB
Evaluation Board
NCP13994MM360GEVB
Evaluation Board
NCP-NCV51152D2PAK7LGEVB
EVB with D2PAK-7L type Power S/W for NCP51152BADR2G / NCP51152CADR2G
Evaluation Board
NCP-NCV51561TO2474LGEVB

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