25 May 2022
EPC launches smallest 40V, 1.1mΩ FET
Efficient Power Conversion Corp (EPC) of El Segundo, CA, USA – which makes enhancement-mode gallium nitride on silicon (eGaN) power field-effect transistors (FETs) and integrated circuits for power management applications – has expanded its selection of low-voltage, off-the-shelf gallium nitride transistors with the introduction of the EPC2066 (0.8mΩ typical, 40V) GaN FET.
The low losses and small size of the EPC2066 makes it a suitable switch for the secondary side of high-power-density 40V–60V to 12V DC-DC converters for the latest servers and artificial intelligence (AI). It is also suitable for secondary-side synchronous rectification to 12V in power supplies and silver box data-center servers, and for high-density motor drive applications at 24–32V. The high-frequency operation, high efficiency, and ultra-small 13.9mm2 footprint of the GaN FET combine for state-of-the-art power density.
The EPC2066 is footprint compatible with EPC’s prior Generation 4 product, the EPC2024. The Generation 5 improvement in area x RDS(on) gives the EPC2066 a 27% reduction in on-resistance in the same area.
“The EPC2066 is significantly smaller than any other FET in the market at this on-resistance,” says co-founder & CEO Alex Lidow. “This part is the perfect complement to the recently released EPC2071 for LLC DC-DC for high-power-density computing applications.”
The EPC9174 reference design board is a 1.2kW, 48V input to 12V output LLC converter. It features the EPC2071 for the primary-side full bridge and the EPC2066 on the secondary side. The GaN FETs enable 1MHz switching frequency and 1.2kW of power in a small 22.9mm x 58.4mm x 10mm size (power density 1472W/in3). The peak efficiency is 97.3% at 550W and the full load efficiency is 96.3% at 12V, delivering 100A output.
The EPC2066 eGaN FET is priced at $3.75 each for a 1Ku/reel. The EPC9174 development board is priced at $780 each. Both the EPC2066 and EPC9174 demonstration board are available for immediate delivery from distributor Digi-Key Corp.