news digest ♦ Solar RF3928
With wideband operation of 2.8GHz to 3.4GHz, the module utilises advanced GaN HEMT and heat-sink technology. Its evaluation board layout is optimised for 50Ω operation and the device has a small signal gain of 12dB and a drain efficiency of 52%.
EPC’s demonstration board features eGaN FETs
The EPC9101 demonstrates size reduction and efficiency enhancement for buck power conversion achieved using high frequency switching enhancement mode gallium nitride power transistors.
Efficient Power Conversion Corporation (EPC) is introducing the EPC9101, a fully functional buck power conversion demonstration circuit.
This board is an 8 V-19 V input to 1.2 V, 18 A maximum output current, 1MHz buck converter. It uses the EPC2014 and EPC2015 eGaN FETs in conjunction with the recently introduced National LM5113 100V half-bridge gate driver from Texas Instruments.
The LM5113 is one of the industry’s first driver designed specifically for enhancement mode gallium nitride FETs. The EPC9101 demonstrates the reduced size and performance capabilities of high switching frequency eGaN FETs when coupled with this dedicated eGaN driver.
The power stage footprint of the EPC9101 circuit is only 8mm x 16mm (about 0.2 square inches) and about 8mm high when taking components from both sides into consideration. Despite its small size, the board has a peak power efficiency of 88% and is capable of delivering 18 amps of current at 1.2 volts.
To assist the design engineer, the EPC9101 is easy to set up to evaluate the performance of the EPC2014 and EPC2015 eGaN FETs and LM5113 gate driver. The board is intended for bench evaluation with low ambient temperature and convection cooling. Additional heat sinking and forced-air cooling can be used to evaluate beyond
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www.compoundsemiconductor.net November/December 2011
the rated current capability of the demonstration circuit.
A similar fully functional buck power conversion demonstration board, the LM5113LLPEVB, is available from Texas Instruments. This board features the LM5113 driver in operation with 100V EPC2001 eGaN FETs. The LM5113LLPEVB demo board is a 15 V – 60 V input to10 V, 10 A, 800kHZ, buck converter. Like the EPC9101, this board demonstrates the size and performance enhancement that can be achieved using the EPC2001 eGaN FETs and the LM5113 gate driver.
The EPC9101 demo boards are priced at $150.00 each and are available for immediate delivery from Digi-Key at
http://digikey.com/Suppliers/us/Efficient- Power-Conversion.page?lang=en.
Cree’s revenues hit $269.0 million
For its first quarter of fiscal 2012, ended September 25, 2011, the LED innovator’s revenues hardly changed compared to the same time last year.
This represents a 0.2% increase compared to revenue of $268.4 million reported for the first fiscal quarter last year and a 11% increase compared to the fourth quarter of fiscal 2011.
GAAP net income for the first quarter of $12.8 million, or $0.11 per diluted share, decreased 78% year-over-year compared to GAAP net income of $58.0 million, or $0.53 per diluted share, for the first quarter of fiscal 2011.
Financial results for the quarter reflect the acquisition of Ruud Lighting on August 17, 2011,
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