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Rompower Announces The AC/DC Laptop Power Adaptor Technology Capable of 94% Efficiency, 20 W/in3 Power Density in an Incredibly Small Package
Taking advantage of the high performance of eGaN® FETs, Rompower Energy Systems has announced a reference design for a tiny, 65 W, 94% efficient AC/DC power adaptor for laptops and other mobile devices.
According to Ionel “Dan” Jitaru, founder and President of Rompower, “We are quite proud to have made this breakthrough in size and performance for such an important product, the AC/DC adaptor. With its small size, it will ease the burden of users having to carry a large, clumsy adapter, while enjoying its energy savings and high efficiency.”.

Company President Ionel Dan Jitaru

Ionel “Dan” Jitaru is the founder of Rompower Inc. an internationally recognized engineering firm in the field of power conversion. Rompower Inc. was acquired by Ascom Energy Systems AG in 2001 and became later Ascom-Rompower Inc. In 2003 Ascom Energy Systems AG merged with Delta Electronics and Rompower become Delta Energy Systems (Arizona) Inc.
In 2013 Ionel “Dan” Jitaru founded Rompower Energy Systems Inc. Rompower Energy Systems Inc. is a research and development engineering firm in the field of power conversion. Ionel “Dan “ Jitaru , has published 65 papers wherein several of them have received the best paper award, and held 52 professional seminars at different International Conferences in the power conversion.  Mr. Jitaru has pioneered several trends in power conversion technologies such as “Soft Switching PWM”, “Full integrated multilayer PCB Planar Magnetic”, “Synchronized rectification” and recently “True Soft Switching technologies”. Some of these technologies have been covered by 63 intellectual properties wherein 37 are granted patents

Company profile

Rompower Energy Systems is an internationally recognized research and development company in the field of power conversion. The primary goal of this engineering firm is to develop new technologies designed to meet the needs of the power conversion industry. Rompower has licensed technologies and provides engineering services worldwide to customers in areas such as high-density and high efficiency DC-DC and AC-DC converters, power conversion for electric and hybrid vehicles and industrial power.
Rompower has developed new technologies for very high efficiency power conversion, ranging from AC-DC adapters wherein we reached the highest efficiency on the market, to multiple kilowatt DC-DC Converters which utilizes Rompower’s timed energy injection technology, pushing the power conversion efficiencies above 99%.

Recent News

Press release – Rompower Announces The AC/DC Laptop Power Adaptor Technology Capable of 94% Efficiency, 20 W/in3 Power Density in an Incredibly Small Package

Taking advantage of the high performance of eGaN® FETs, Rompower Energy Systems has announced a reference design for a tiny, 65 W, 94% efficient AC/DC power adaptor for laptops and other mobile devices. TUCSON, Az. – April 2017 – Rompower Energy Systems, an internationally recognized research and development company in the field of power conversion,30

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PCIM 2017 – Sunday, May14th – Monday, May 15th

In May 2017, at PCIM 2017 in Nuremberg, Ionel Dan Jitaru from Rompower Energy Systems will present a seminar and a tutorial Seminar – Sunday, May 14th  “Modern Magnetic Technologies for High Efficiency and High Power Density “ Tutorial – Monday, May 15th  “New Trends in Power Conversion for Very High Efficiency and High Power Density”

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PCIM 2017 – Key Note Paper – Thursday May 18th

On May 18th 2017 Ionel Dan Jitaru will present a Key Note paper entitled “Evolution in Topologies as a Result of new Devices and Enabling Technologies” Click Here  for more information on PCIM 2017 programs

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APEC 2017 March 26-30 Tampa

At APEC 2017 in Tampa (March 26-30), Rompower Energy Systems had introduced the latest 65W adapter with the word’s highest efficiency over the entire input voltage range and a power density above 20W/in3.  Click here for more information.

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A Family of High Efficiency Variable Frequency Soft-Switching Off-line DC-DC Converters

The paper presents a family of off-line DC-DC converters for medium to high power delivering more than 95% efficiency for output levels of 12 to 48 V. The multi-layer PCB solution allows for low profile converters with multiple applications, from AC-DC adapters to TELECOM and computing. The main gain of this new design approach consist30

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750W High Efficiency and Soft-Switching Off-Line 12 V Converter

The paper presents an innovative off-line low profile converter design that delivers 750 W of power at 95%-96% efficiency for nominal input range, using variable frequency topology with high frequency zero voltage switching (ZVS) and zero current switching (ZCS) for primary switchers. Theoretical considerations and practical results are presented for high frequency and high voltage30

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Our Advanced Technologies

Special proprietary approach in packaging

Special proprietary approach in packaging

High power modules

High power modules DC-DC converters with low or high voltage input

Low cost front-end AC-DC converters

Low cost front-end AC-DC converters

Synchronized rectification

Synchronized rectification applied to high-density DC-DC converters

Multilayer PCB with integrated-magnetic

Multilayer PCB with integrated-magnetic

Planar-magnetic structures

Planar-magnetic structures for high-density DC-DC & AC-DC converters

Our Portfolio