EPC announces wireless-power demonstration system featuring HF GaN FETs


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High switching speed increases the efficiency of power electronics for highly resonant wireless power transfer

EPC's wireless power system operates at 6.78 MHz and can deliver up to 15 W.

EPC (Efficient Power Conversion) has announced a high-efficiency wireless power demonstration system using the high-frequency switching capability of GaN transistors. EPC's GaN FETs are attractive for these systems due to their ability to operate efficiently at high frequency, voltage, and power. The founders of WiTricity invented highly resonant wireless power transfer, and the company licenses its intellectual property to businesses seeking to build products based on the technology. Capable of transferring power over distance, WiTricity technology can serve a wide range of consumer, medical, industrial, and automotive applications. Products using highly resonant wireless power transfer can meet stringent regulatory guidelines, and is safe for people and animals. Many wireless charging products now in the market use traditional magnetic induction coils with operating frequencies between 100-300 kHz, and Class E, F, and S amplifier converter topologies Recently, organizations such as the Consumer Electronics Association and A4WP (Alliance for Wireless Power) have called for a higher frequency standard, 6.78 MHz, for wireless charging systems. At higher frequencies, traditional MOSFETs approach the limit of their switching capability. EPC's GaN FETs offer higher efficiency compared to MOSFETs at these higher frequencies. This wireless power demonstration system, jointly developed by EPC and WiTricity, is a class-D power system operating at 6.78 MHz and is capable of delivering up to 15 W to a load. The purpose of this demonstration system is to simplify the evaluation process of the wireless power technology. The system includes all the critical components that easily connect to demonstrate powering a device with wireless energy transfer. Efficient Power Conversion