The EPC9174KIT reference design board by EPC is a 1.2 kW, 48 V input to 12 V output LLC converter that functions as a DC transformer with a fixed conversion ratio of 4:1. It integrates the 100 V EPC2071 for the primary side full bridge, the uP1966E and LMG1020 gate drivers, and the Microchip dsPIC33CK32MP102 16-bit digital controller.
The implementation of GaN technology allows for a compact size of 22.9 mm x 58.4 mm x 10 mm, delivering a power density of 1472 W/in3 while operating at a 1 MHz switching frequency and providing 1.2 kW of power.
EPC's EPC9174KIT reference design board represents a significant advancement in power electronics, leveraging GaN technology to achieve remarkable power density and efficiency in a compact form factor. By integrating state-of-the-art components and advanced digital control, this design demonstrates the potential for high-performance power conversion solutions in modern electronics applications.
High power density: 1472 W/in3
Peak efficiency: 97.3% at 550 W
Full-load efficiency: 96.3% @ 12 V delivering 100 A output
22.9 mm x 58.44 mm (0.90 inches x 2.30 inches)
Low profile: 10 mm total converter thickness without heatsink
Temperature rise: +72°C @ 12 V with 100 A output (with heatsink kit installed)
Fixed switching frequency: 1 MHz
Soft startup into full resistive load
48 V DC-DC conversion
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