Mass production success story of the industry's smallest 65W AC/DC Power Adapters — Desktop & Wall-Mount for To C.

E-Power Solutions' "DAC (Dual Active Clamp) technology" brings a new innovation to the power supply industry. This groundbreaking circuit technology has been successfully brought to market by UNIFIVE as a high-quality mass production Products. Since its founding in 1989, our company has specialized in the development and manufacturing of compact power supplies, and this is an example of how our technical expertise has transformed an innovative idea into a reliable reality.

Products Overview: Breakthrough Downsizing Achieved by ADAMON 65W Gen2

Proprietary Technology That Achieved One of the Smallest Sizes in the World

The ADAMON 65W Gen2 has achieved an astonishingly compact and lightweight form of only 46cc in volume and 65g in weight. This was made possible by combining E-Power Solutions' Dual Active Clamp (DAC) technology with UNIFIVE's long-standing power supply manufacturing expertise.

Volume Reduction

42% smaller than conventional models
Ultra-compact 46cc design

Weight Reduction

40% lighter than conventional models
Only 65g

Power Efficiency

High efficiency of 94%
Minimized heat generation

Technical Features and Mass Production Challenges Addressed

The core of DAC technology lies in a voltage clamp circuit that limits input voltage below 250V, combined with a high-efficiency active clamp DC-DC converter. This innovative circuit configuration enables the replacement of conventional large 400V class electrolytic capacitors with compact components rated under 250V.

UNIFIVE addressed the following technical challenges in designing this breakthrough circuit technology into a mass-producible Products:

Optimized PCB design for high-speed switching circuits
Thorough EMI countermeasures to meet CISPR 32 Class B standards
Efficient thermal design within a compact enclosure
Compliance with strict safety standards (PSE/IEC 62368-1)

Taking advantage of this technological edge, E-Power Solutions now offers a commercial model under the ADAMON brand (ADAMON 65W Gen2 World's Smallest USB-C Charger on Amazon).

Innovative Difference Between GaN AC/DC Power Adapters — Desktop & Wall-Mount and DAC Technology

A Different Perspective from Conventional GaN Approaches

Mainstream GaN (gallium nitride) AC/DC Power Adapters — Desktop & Wall-Mount on the market aim for miniaturization through the high performance of high-voltage GaN MOSFETs. In contrast, ADAMON 65W Gen2 achieves comparable or better compactness through innovative circuit design that utilizes conventional, reliable Si devices and enhances performance with low-voltage MOSFETs.

Comparison of Technical Approaches

Category	Conventional GaN Adapter	ADAMON 65W (DAC Technology)
Device Used	600–650V GaN HEMT	250V High Performance Si MOSFET
Miniaturization Method	Downsizing via high-frequency operation	Component downsizing via input voltage clamp
EMI Measures	High-speed switching solutions	Low EMI with ZVS (Zero Voltage Switching)
Control Circuit	Difficult gate driver design	Stable operation with existing control ICs

Performance Benefits Realized by DAC Technology

By adopting DAC technology, the following advantages are realized:

Power Efficiency: 94% high efficiency (equal to or better than GaN models)
Size: Industry-leading compactness at 46cc (surpasses GaN models)
EMI Performance: Margin of -6dB compared to CISPR 32 standard
Reliability: High reliability through proven Si devices