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采用与氮化镓场效应晶体管匹配的驱动器集成电路可以提升低压负载点转换器的性能

采用与氮化镓场效应晶体管匹配的驱动器集成电路可以提升低压负载点转换器的性能

本文阐析面向12 V输入电压转到1 V输出电压的负载点转换器,如果采用与氮化镓场效应晶体管匹配的驱动器,可以显著提升性能。从文章中展示的uPI1966D设计范例可以看到,EPC公司的不对称氮化镓半桥场效应晶体管EPC2100与uPI半导体公司的双通道同步驱动器集成电路是非常匹配的。

How2Power Today
2019年12月
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分类: 技术文章

GaN 的功率和演变- 第5部分:采用eGaN FET和集成电路构建低成本、高效的12 V - 1 V 负载点转换器

GaN 的功率和演变- 第5部分:采用eGaN FET和集成电路构建低成本、高效的12 V - 1 V 负载点转换器

氮化镓器件对提升主流应用的效率的贡献很大,例如在传统硅基12 V - 1 V负载点 DC/DC转换器。基于eGaN集成电路的12 V转到1 V、12 A负载转换器在5 MHz的频率下,可以实现78%峰值效率及1000 W/in3 功率密度,而成本则低于每瓦0.2美元。

Power Systems Design
2019年1月
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分类: 技术文章

宜普电源转换公司(EPC)推出比等效MOSFET小型化8倍的 40 V氮化镓功率晶体管

宜普电源转换公司(EPC)推出比等效MOSFET小型化8倍的 40 V氮化镓功率晶体管

宜普公司为功率系统设计师提供比等效MOSFET小型化8倍的40 V、5 mΩ氮化镓功率晶体管(EPC2049),应用于负载点(POL)转换器、激光雷达(LiDAR)及具低电感的马达驱动器。

宜普电源转换公司(EPC)宣布推出EPC2049功率晶体管,应用于负载点(POL)转换器激光雷达(LiDAR)包络跟踪电源D类音频放大器及具低电感的马达驱动器。 EPC2049晶体管的额定电压为40 V、最大导通电阻为5 mΩ及脉冲输出电流为175 A。

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EPC eGaN技术在性能及成本上实现质的飞跃

EPC eGaN技术在性能及成本上实现质的飞跃

EPC公司宣布推出EPC2045及EPC2047氮化镓场效应晶体管(eGaN®FET),对比前一代的产品,这些晶体管的尺寸减半,而且性能显著提升。

全球增强型氮化镓晶体管领袖厂商、致力于开发创新的硅基功率场效应晶体管(eGaN FET)及集成电路的宜普电源转换公司(EPC)宣布推出全新的EPC2045(7 mΩ、100 V)及EPC2047(10 mΩ、200 V)晶体管,在提升产品性能之同时也可以降低成本。100 V的EPC2045应用于开放式伺服器架构应用于开放式伺服器架构以实现48 V至负载的单级电源转换、负载点(POL)转换器、USB-C及激光雷达(LiDAR)等应用。200 V 的EPC2047的应用例子包括无线充电、多级AC/DC电源供电、机械人应用及太阳能微型逆变器

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Highlights from APEC 2016 – GaN, 48V POL, wireless charging and more!

Highlights from APEC 2016 – GaN, 48V POL, wireless charging and more!

Emerging applications such as 48V-to-point-of-load (POL), wireless power and USB Type-C had a lot of interest. Google joined the Open Compute Project a few weeks ago and proposed a computer server-rack architecture based on a 48V power-distribution bus to improve overall system efficiency. While the 48V bus has been around for a long time, the push (and challenge) is for high-efficiency 48V-to-POL voltage regulators. EPC showcased TI’s 48V-to-1V EVM which uses the LMG5200 GaN module (driver and FETs), announced at APEC last year, and a new TI analog controller (TPS53632G).

TI E2E Community
Pradeep Shenoy
Mar 28, 2016
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Getting from 48 V to load voltage

Getting from 48 V to load voltage

Improving low-voltage DC/DC converter performance with GaN transistors:
The emergence of commercially available and cost-effective gallium nitride (GaN) power transistors begins a new age in power electronics. There are significant benefits in using enhancement-mode gallium nitride FET (eGaN FET) devices in power converters for existing data center and telecommunications architectures centering around an input voltage of 48 VDC with load voltages as low as 1 VDC. High-performance GaN power transistors can enable new approaches to power data center and telecommunications systems with higher efficiency and higher power density than possible with previous Si MOSFET based architectures.

Power Systems Design
David Reusch, Ph.D., and John Glaser, Ph.D.
January, 25, 2016
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The eGaN FET-Silicon Power Shoot-Out: Part 2 – Drivers, Layout

eGaN FETs differ from silicon MOSFETs in part because of their significantly faster switching speeds. In the second article of this series, we explore the different requirements for gate drive, layout, and thermal management.

By Johan Strydom PHD, Director of Application Engineering, EPC
Power Electronics Technology
January 1, 2011

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High Step-Down Ratio Buck Converters With eGaN Devices

The intermediate bus architecture (IBA) is currently the most popular power system architecture in computing and telecommunications equipment. It typically consists of a +48 V system power distribution bus that feeds on-board bus converters, which in turn supply power to nonisolated, dc-dc converters. These nonisolated converters generate the low supply voltages required to power the various logic circuits. Because of their proximity to the circuits they power, these converters are commonly referred to as point-of-load converters (POLs).

By Johan Strydom, EPC, El Segundo, Calif. and Bob White, Embedded Power Labs, Highlands Ranch, Colo.
How2Power
November, 2010

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