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Televisions can get their content wirelessly, but there is one set of wires they still need: those in their power cord. The consumer electronics industry has floated ideas for freeing TVs from their power cords, but this goal remains elusive. There are several reasons, such as the difficultly of meeting high-power requirements for large-screen TVs and the need for identifying an economical technology. Nevertheless, eGaN FETs could play a role in making TVs truly cordless devices.
Power Electronic Tips
February, 23, 2017
EPC’s new development boards can be configured as either a buck converter or a ZVS class-D amplifier, demonstrating reduced losses at high frequency using an eGaN FET synchronous bootstrap augmented gate drive.
EL SEGUNDO, Calif.— March 2016 — Efficient Power Conversion Corporation (EPC) Introduces the EPC9066, EPC9067, and EPC9068 development boards, which are configurable to a buck converter or as a ZVS class-D amplifier. These boards provide an easy-to-use way for power systems designers to evaluate the exceptional performance of gallium nitride transistors, enabling the designers to get their products into volume production quickly. All three boards feature a zero reverse recovery (QRR) synchronous bootstrap rectifier augmented gate driver to increase efficiency at high frequency operation, up to 15 MHz. The boards can produce a maximum output of 2.7 A in the buck and ZVS class-D amplifier configurations. Loss reduction is realized across the entire current range.
In this installment, we present a method to design a suitable EMI filter that can reduce unwanted frequencies to levels within radiated EMI specifications, and do this without negatively impacting the performance of the wireless power coil. In addition, the overall radiated EMI design aspects will also be covered.
EEWeb - Wireless & RF Magazine
Michael de Rooij, Ph.D.
February, 1, 2016
The superior characteristics of eGaN® FETs, such as low output capacitance, low input capacitance, low parasitic inductances, and small size make them ideal for increasing efficiency in highly resonant, Rezence (A4WP) compliant, wireless power transfer systems.
EL SEGUNDO, Calif.—June, 2014 — Efficient Power Conversion Corporation (EPC) today announce the introduction of demonstration boards for wireless power transfer in an innovative high performance topology; Zero Voltage Switching (ZVS) Class-D. The EPC9506 and EPC9507 amplifier (source) boards utilize the high frequency switching capability of EPC gallium nitride transistors to facilitate wireless power systems with greater than 75% efficiency.