|By Business Wire||
|July 15, 2014 06:01 AM EDT||
Efficient Power Conversion Corporation (EPC) today announces the immediate availability of a complete demonstration wireless power transfer kit. The 40 V (EPC9111) or 100 V (EPC9112) wireless kits have three components:
- Source (or amplifier) board
- Class 3 A4WP compliant source (or transmit) coil
- Category 3 A4WP compliant device (or receiving) board including coil
The system is capable of delivering up to 35 W into a DC load while operating at 6.78 MHz (the lowest ISM band). The purpose of this demonstration kit is to simplify the evaluation process of using eGaN FETs for highly efficient wireless power transfer. The EPC9111 and EPC9112 utilize the high frequency switching capability of EPC gallium nitride transistors to facilitate wireless power systems with greater than 75% efficiency.
Value of eGaN FETs in Wireless Power Transfer Systems
The requirements of wireless energy transfer systems include high efficiency, low profile, robustness to changing operating conditions and, in some cases, light weight. These requirements translate into designs that need to be efficient and able to operate at high switching speeds without a bulky heatsink. Furthermore the design must be able to operate over a wide range of coupling and load variations. The fast switching capability of eGaN FETs is ideal for highly resonant power transfer applications.
The popularity of highly resonant wireless power transfer is increasing rapidly, particularly for applications targeting portable device charging. The end applications are varied and evolving quickly from mobile device charging, to life-extending medical implementations, to safety-critical hazardous environments.
Source (Amplifier) Board
The source board is configured in an optional half-bridge topology (for single-ended configuration) or default full-bridge topology (for differential configuration), and include the gate driver(s) and oscillator that ensure operation of the system at 6.78 MHz.
Source (Transmit) Coil
The source coil, as well as the device coil, are Rezence (A4WP) compliant and have been pre-tuned to operate at 6.78 MHz. The source coil is class 3 and the device coil is category 3 compliant.
Device (Receiving) Board including Coil
The device board includes a high frequency Schottky diode based full-bridge rectifier and output filter to deliver a filtered unregulated DC voltage. The device board comes equipped with two LED’s, one to indicate the power is being received and a second LED, which indicates that the output voltage has reached the maximum and is above 37 V. The device board can also be configured as a half-bridge rectifier that allows for double output voltage operation.
Price and Availability
If you are interested in learning more about designing with eGaN FETs for wireless energy transfer, a visit by an EPC field application engineer can be scheduled by contacting EPC at http://epc-co.com/epc/Contact/RequestMeeting.aspx
Additional application and design information for EPC eGaN FETs is available through the following resources:
- Wireless Power Transfer: http://epc-co.com/epc/Applications/WirelessPower.aspx
- Applications Support: http://epc-co.com/epc/DesignSupport.aspx
- Products: http://epc-co.com/epc/Products/eGaNFETs.aspx
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, solar micro inverters, remote sensing technology (LiDAR), and class-D audio amplifiers with device performance many times greater than the best silicon power MOSFETs.
Visit our web site: www.epc-co.com
Sign-up to receive EPC updates via email: http://bit.ly/EPCupdates
or text "EPC" to 22828
Follow EPC on Twitter at http://twitter.com/#!/EPC_CORP
Like EPC on Facebook at http://www.facebook.com/EPC.Corporation
eGaN is a registered trademark of Efficient Power Conversion Corporation, Inc.
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