EPC, a global leader in enhancement mode gallium nitride (eGaN)-based power management, launched the EPC9159, a compact LLC converter. The EPC9159 is a 48 V to 12 V LLC converter designed for high-density 48 V server power and DC-DC converters. This converter delivers 1 kW of power in a tiny 17.5 mm x 22.8 mm footprint for a power density of 5130 W/cm3. This is achieved by employing gallium nitride (GaN) power switches operating at high switching frequencies in both the primary and secondary circuits.
The power supply topology used in the design of the EPC9159 is based on the LLC topology. The implemented LLC consists of a primary side full bridge, a fixed ratio planar transformer, and a center tab synchronous rectifier for the secondary side. The primary full bridge uses four EPC2619, 80 V-rated 3.3 mΩ GaN transistors, and the secondary uses six EPC2067, 40 V-rated 1.3 mΩ GaN transistors.
The EPC9159 achieves a power stage efficiency of 98% at 25 A and a full-load efficiency of 96.2% at 83 A at 12 V. This design is ideal for high-density computing applications such as artificial intelligence and advanced gaming.
“eGaN FETs and ICs provide the fast switching, small size, and high efficiency needed to provide the highest power density solutions for advanced computing applications,” said Alex Lidow, CEO of EPC. “The EPC9159 is the ideal solution to address the growing power needs of artificial intelligence and to support the transition to 48 V input for the new high-density and high-efficiency servers required for these advanced computing applications.”
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