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GaN 晶体管启程商用之路

自2004年GaN HEMT(高电迁移 率晶体管)问世以来,基于GaN材料 的新技术不断涌现,但由于成本偏 高和耗尽型 作的不方便,GaN晶体 管市场接受度一直受限,不过这一 局面有望得到改观。美国宜普公司 最近推出首款增强型硅基GaN功率晶 体管(简称eGaN FET),可专门用于 替代MOSFET,而且使用标准硅制 造技术和设备,可以低成本大批量 生产。

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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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Driving eGaN™ FETs Both gate and Miller capacitances are significantly lower

As enhancement mode gallium-nitride-on-silicon transistors (eGaN™) gain wider acceptance as the successor to the venerable - but aged - power MOSFET, designers have been able to improve power conversion efficiency, size, and cost. eGaN FETs, however, are based on a relatively new and immature technology with limited design infrastructure to quickly design and implement products.

By Johan Strydom PhD, Director of Application Engineering EPC
Bodo’s Power Systems
November, 2010

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GaN Power Device Market to Hit $350M in 2015

The latest report from Yole Développement “GaN Technologies for Power Electronics Applications: Industry and Market Status & Forecasts” says the Total Accessible Market is $16.6b and is envisioned to be split into Power ICs, Power Discretes and Power Modules.

Compound Semiconductor
October 28, 2010

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How2 Understand eGaN Transistor Reliability

Efficient Power Conversion’s (EPC) enhancement-mode gallium-nitride (eGaN) power transistors, although similar to standard power MOSFETs, deliver performance unattainable by silicon-based devices.

Yanping Ma, PhD, Efficient Power Conversion, El Segundo, Calif.
How2Power
October, 2010

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GaN正式登场,传统功率器件将被替代

MOSFET、IGBT可以休矣,即将成为过去,在这个250亿美元的市场取而代之的将是GaN功率器件——这是EPC首席执行官Alex Lidow日前在接受EDN China专访时的说法。Lidow博士之前在IR担任了12年CEO,在2007年他创立了宜普电源转换公司(Efficient Power Conversion Corporation,EPC),他在斯坦福大学的博士论文就是关于HEXFET功率MOSFET的,是相关专利的发明者之一。在HEXFET专利过期之前,相关版税已超过9亿美元。

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Driving eGaN™ Transistors for Maximum Performance

The recent introduction of enhancement mode GaN transistors (eGaN™) as power MOSFET/ IGBT replacements in power management applications enables many new products that promise to add great system value. In general, an eGaN transistor behaves much like a power MOSFET with a quantum leap in performance, but to extract all of the newly-available eGaN transistor performance requires designers to understand the differences in drive requirements.

By Johan Strydom and Alex Lidow
September, 2010

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eGaN™-Silicon Power Shoot-Out: Part 1 Comparing Figure of Merit (FOM)

One yardstick to compare enhancement mode GaN (eGaN) power devices with state-of-the-art silicon MOSFETs is FOM. However, beyond these pure mathematical numbers, there are other device and package related parameters that significantly influence in-circuit performance.

By Johan Strydom PHD, Director of Application Engineering, EPC
Power Electronics Technology
September 1, 2010

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How2 Get the Most Out of GaN Power Transistors

Thirty years of silicon power-MOSFET development has taught us that one of the key variables controlling the adoption rate of a disruptive technology is how easy the new technology is to use. This principle has guided the design of EPC’s enhancement-mode GaN (eGaN) transistors. This article explains why eGaN devices are easy to use, describing how they operate and their similarities and differences versus power MOSFETs.

By Johan Strydom
How2Power
June, 2010

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Can Gallium Nitride Replace Silicon?

For the past three decades, Silicon-based power management efficiency and cost have shown steady improvement. In the last few years, however, the rate of improvement has slowed as the Silicon power MOSFET has asymptotically approached its theoretical bounds. Gallium Nitride grown on top of a silicon substrate could displace Silicon across a significant portion of the power management market.

By Alex Lidow, PhD
Power Electronics Europe
Issue 2, 2010

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Efficient Power Conversion Corporation (EPC) today announced the introduction of the EPC9002 development board

EL SEGUNDO, Calif.--(BUSINESS WIRE)—Efficient Power Conversion Corporation (EPC) today announced the introduction of the EPC9002 development board to make it easier for users to get started designing with EPC’s 100V enhancement-mode GaN transistor products.

The EPC9002 development board is a 50 V maximum input voltage, 7 A maximum output current, half bridge with onboard gate drives, featuring the EPC1001 100V GaN Power Transistor. The purpose of this development board is to simplify the evaluation process of the EPC1001 GaN power transistor by including all the critical components on a single board that can be easily connected into any existing converter. The EPC9002 development board is 2” x 1.5” and contains not only two EPC1001 GaN transistors in a half bridge configuration with gate drivers, but also an on board gate drive supply and all critical components and layout for optimal switching performance. There are also various probe points to facilitate simple waveform measurement and efficiency calculation.

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Efficient Power Conversion Corporation (EPC) today announced that the company has made available on its web site SPICE models for all of its enhancement mode GaN transistors.

EL SEGUNDO, Calif.--(BUSINESS WIRE)—Efficient Power Conversion Corporation (EPC) today announced that the company has made available on its web site SPICE models for all of its enhancement mode GaN transistors.

TSPICE, PSPICE, and LTSPICE device models have been developed to help the designer of advanced GaN-based power conversion circuits and systems understand the value of this new power transistor family and reduce their time-to-market with benchmark products. These free downloads are available at:

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Efficient Power Conversion Corporation Announces 40 V to 200V Enhancement Mode GaN Power Transistors

EL SEGUNDO, Calif-March 8, 2010 -Efficient Power Conversion Corporation (EPC) today introduced a family of enhancement mode power transistors based on its proprietary Gallium Nitride on Silicon technology.

Spanning a range of 40 Volts to 200 Volts, and 4 milliohms to 100 milliohms, these power transistors demonstrate significant performance advantages over state-of-the-art silicon-based power MOSFETs. EPC’s technology produces devices that are smaller than similar resistance silicon devices and have many times superior switching performance. Applications that benefit from this newly available performance are DC-DC power supplies, point-of-load converters, class D audio amplifiers, notebook and netbook computers, LED drive circuits, telecom base stations, and cell phones, to name just a few.

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Efficient Power Conversion Corporation Announces Exclusive Global Distribution Deal with Digi-Key Corporation

EL SEGUNDO, Calif. - March 8, 2010 -Efficient Power Conversion Corporation (EPC) today announced that Digi Key Corporation will be the exclusive global distributor for EPC’s line of enhancement-mode Gallium Nitride power transistors.

Spanning a range of 40 Volts to 200 Volts, and 4 milliohms to 100 milliohms, these power transistors demonstrate significant performance advantages over state-of-the-art silicon-based power MOSFETs. EPC’s technology produces devices that are smaller than similar resistance silicon devices and have many times superior switching performance. Applications that benefit from this newly available performance are DC-DC power supplies, point-of-load converters, class D audio amplifiers, notebook and netbook computers, LED drive circuits, telecom base stations, and cell phones, to name just a few.

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