Sign up today to get the latest news and updates from EPC on new product announcements, applications work, and much more. Sign up for EPC email updates.

Efficient Power Conversion (EPC) Introduces eGaN Power Integrated Circuit for a New Benchmark in Efficiency and Cost for A4WP Rezence Wireless Power Transfer

Categories: Articles
Efficient Power Conversion (EPC) Introduces eGaN Power Integrated Circuit for a New Benchmark in Efficiency and Cost for A4WP Rezence Wireless Power Transfer

New EPC2107 and EPC2108 eGaN® power integrated circuits include monolithic half bridge and integrated bootstrap functions for A4WP compliant Class 2 and Class 3 solutions. In addition, development boards and complete wireless power solutions – transmit and receive devices – for quick and easy evaluations of these components are available.

EL SEGUNDO, Calif. — July 2015 — EPC announces the EPC2107 (100 V) and EPC2108 (60 V) eGaN half bridge power integrated circuits with integrated bootstrap FET, eliminating gate driver induced reverse recovery loses as well as the need for a high side clamp. This is the first time that a bootstrap FET has been integrated in an eGaN power circuit.

Designed specifically for resonant wireless power transfer applications, these products enable rapid design of highly efficient end-user systems, setting the stage for mass adoption of wireless power transfer. In addition, these GaN power integrated circuits come in extremely small, chip-scale packages, reducing the size of the overall system. This new line of chips is lower in cost due to reduced overall component count – one GaN device versus three FETs!

Rezence™ Wireless Power Standard

Although there are several standards for wireless power transfer, the A4WP 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 an ideal choice for automotive, retail, and household applications.

In short, Rezence provides the flexibility and capabilities to bring wireless charging to the masses, a rapidly emerging market that is expected to be a $15.6 B 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.

EPC’s New Products and Benefits

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.

Part Number VDS RDS(on) (Typical) QOSS (Typical)
    Q1 Control FET Q2 Sync. FET Bootstrap FET Q1 Control FET Q2 Sync. FET Bootstrap FET
EPC2107 100 V 240 mΩ 240 mΩ 2.1 Ω 800 pC 1400 pC 140 pC
EPC2108 60 V 150 mΩ 150 mΩ 2.1 Ω 650 pC 1000 pC 100 pC

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.

Wireless Power Demonstration Systems

In support of the EPC2107 and EPC2108 integrated circuits, EPC also offers complete demonstration wireless power transfer systems, as well as development boards for the evaluation of these two new eGaN power integrated circuits.

The A4WP Class 3 (EPC9113) or A4WP Class 2 (EPC9114) wireless power demonstration systems have three components:

  • ZVS Class-D Source (or amplifier) board
  • Class 2 or 3 Rezence compliant source (or transmit) coil
  • Category 3 Rezence compliant device (or receiving) board including coil

The EPC9113 wireless power demonstration kit is A4WP Class 3 compliant, capable of delivering up to 16 W into a DC load while operating at 6.78 MHz (which can be modified to operate at 13.56 MHz), while the EPC9114 wireless power demonstration kit is A4WP Class 2 compliant at 10 W. The purpose of the demonstration kit is to simplify the evaluation process of using eGaN FETs for highly efficient wireless power transfer. Both kits utilize the high frequency switching capability of EPC gallium nitride transistors to facilitate high efficiency wireless power systems.

For customers with their own coil design, the source (or amplifier) boards are also sold separately as EPC9509 (featuring the 60 V EPC2108) and EPC9510 (featuring the 100 V EPC2107).

Product Price and Availability

Part Number Description Price
EPC2107 100 V monolithic half-bridge with integrated bootstrap FET $0.89 (1K units)
EPC9114 Wireless power demonstration kit $895.00 each
EPC9510 ZVS Class-D Source (amplifier) board $418.95 each
EPC2108 60 V monolithic half-bridge with integrated bootstrap FET $0.85 (1K units)
EPC9113 Wireless power demonstration kit $895.00 each
EPC9509 ZVS Class-D Source (amplifier) board $418.95 each

All products are available for immediate delivery from Digi-Key at

About EPC

EPC is the leader in enhancement mode gallium nitride based power management devices. EPC was the first to introduce enhancement-mode gallium-nitride-on-silicon (eGaN) FETs as power MOSFET replacements in applications such as DC-DC converters, wireless power transfer, envelope tracking, RF transmission, power inverters, remote sensing technology (LiDAR), and Class-D audio amplifiers with device performance many times greater than the best silicon power MOSFETs.

eGaN is a registered trademark of Efficient Power Conversion Corporation, Inc.

Press Contact

Efficient Power Conversion Corporation Joe Engle, 310.986.0350 [email protected]