Designed specifically for resonant wireless power transfer applications, the EPC2107 (100 V) and EPC2108 (60V) eGaN power integrated circuits include monolithic half bridge and integrated bootstrap functions for A4WP compliant Class 2 and Class 3 applications. This integration eliminates gate driver induced recovery losses as well as the need for a high-side clamp. These devices come in 1.35 mm x 1.35 mm chip-scale package for reduced size, improved switching speed, and thermal performance leading to increased power density.
A4WP Rezence wireless power standard
Although there are several standards for wireless power transfer, the A4WP (Alliance for Wireless Power) standard, Rezence, offers superior features and capabilities to end users – the consumer. For example, Rezence allows for spatial freedom when charging, eliminating the need for exact positioning of devices when charging. It also has an exceptional charging range, providing consumers with true drop-and-go charging. Additionally, the standard allows for charging multiple devices with different power requirements simultaneously. Another key feature is that Rezence compliant wireless power systems will charge devices in the presence of metallic objects such as keys, coins, and utensils, making it suitable for automotive, retail, and household applications. Pike Research estimates that the rapidly emerging wireless charging market to a be a $15 billion industry by 2020.
EPC’s gallium nitride devices play a major role in this market, having introduced the first eGaN FET for wireless power transfer in 2012. In addition to designing A4WP Rezence compliant power products, EPC has published a Wireless Power Handbook dedicated to addressing wireless power systems design issues such as multi-mode operation and EMI compliance.
By integrating two eGaN® power FETs into an integrated power circuit, interconnect inductances and the interstitial space needed on the PCB are eliminated. Having this single integrated power component increases both efficiency (especially at higher frequencies) and power density, while reducing assembly costs to the wireless power system designer’s end product.
All products are available for immediate delivery from Digi-Key.
Related resources:
“Power converters with GaN,” by Alex Lidow, CEO of EPC
Electronic Power Conversion Corp.
www.epc-co.com
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