News: Microelectronics
10 December 2024
EPC launches GaN FET-based reference design for solar PV optimizers
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 launched the EPC9178, the latest reference design for photovoltaic (PV) optimizers. Designed to deliver high reliability while addressing critical challenges in energy efficiency and cost-effectiveness through the reduction of passive components in solar energy systems, the EPC9178 demonstrates the transformative potential of GaN technology for renewable energy solutions, says the firm.
The EPC9178 reference design employs a back-to-back buck-boost converter topology, ensuring optimal energy harvesting for each solar panel, even under challenging conditions such as shading. The compact, high-performance solution bridges the gap between micro-inverters and string inverters, offering enhanced energy efficiency and compatibility with existing infrastructure.
The EPC9178 combines GaN technology with a dedicated controller to deliver what is claimed to be unmatched performance and reliability. Features include:
- Compact design: High-frequency operation at 450kHz minimizes the size of passive components, resulting in a lightweight and space-saving solution.
- High efficiency: up to 98% peak efficiency, reducing power losses and improving thermal management.
- Advanced GaN technology: Powered by 100V-rated EPC2306 eGaN FETs, the EPC9178 offers low on-resistance (3.8mΩ) and reduced switching losses compared with silicon MOSFETs.
- Simplified control: An integrated LM5177 controller from Texas Instruments reduces design complexity and component count.
- Versatile output settings: Operates across an input voltage range of 30–60V, with selectable output voltages of 30V, 45V and 60V.
“The EPC9178 delivers a compact, high-performance and reliable design that enables cost-effective solar energy systems,” says CEO Alex Lidow.
The EPC9178 evaluation boards are priced at $480. The EPC2306 is priced at $1.87 each in 3Ku reels. Evaluation boards and devices are available for immediate delivery from distributor Digi-Key Corp.
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