Super junction MOSFETs optimised to meet the high-efficiency needs

08-01-2024 | Alpha and Omega Semiconductor | Power

Alpha and Omega Semiconductor Limited announced the release of two aMOS5 600V FRD Super Junction MOSFETs. The device is the company's high-voltage MOSFET platform, developed to fulfil the high efficiency and high-density necessities of servers, workstations, telecom rectifiers, solar Inverters, EV charging, motor drives and industrial power applications.

The design of today's mid-high power SMPS and solar inverter systems boils down to four major challenges – higher efficiency, higher density, lower system costs, and uncompromised robustness. High Voltage Super Junction MOSFETs are the dominant option for topologies such as single/interleaved/dual boost/CrCM TP PFCs, LLC, PSFB, multi-level NPC/ANPC, etc.

The new MOSFETs have been the leading high-voltage super junction solution tailored for fast switching, ease-of-use, and robustness in mission-critical applications. aMOS5 FRD FETs are engineered with strong intrinsic body diode to handle hard commutation scenarios when the freewheeling body diode is in reverse recovery due to abnormal operations, such as short-circuit or start-up transients. The two products released, the AOK095A60FD (TO-247) and AOTF125A60FDL (TO-220F), are 600V FRD FETs with 95mOhm and 125mOhm maximum Rdson, respectively. In tests conducted by AOS engineers, the body diodes of these two FRD FETs have survived high di/dt under abnormal system conditions, even at elevated junction temperatures of up to 150C. Also, AOS tests have shown that these devices' turn-off energy (Eoff) is noticeably lower than the competition's, contributing to higher efficiency in light or mid-load conditions.

"We defined our products for traditional power supplies, as well as DC-DC and DC/AC converters of solar inverters and ESS systems, where bi-directional topologies are needed. As energy storage-ready inverters become the trend and high voltage batteries are utilised increasingly in AC-coupled systems, the AOK095A60FD and AOTF125A60FDL will become industry-leading solutions for bi-directional DC-DC and inverter/PFC applications that serve a wide range of power supplies, solar PV inverters, and ESS hybrid converters," said Richard Zhang, senior director of Product Line and Global Power Supply Business at AOS.


By Seb Springall

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