News | June 10, 2009

MTT-S 2009: Cree Demonstrates 120-Watt And 180-Watt High-Efficiency GaN HEMT

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Cree, Inc. announces demonstrations of its latest broadband GaN HEMT transistors (the CGH40120F and CGH40180PP) at the 2009 IEEE/MTT-S International Microwave Symposium being held this week in Boston. The demonstration amplifiers feature high efficiency and high power under continuous-wave (CW) operation, with typical power-added efficiencies (PAE) of 70% at saturated powers of 120W for the CGH40120F and 180W for the CGH40180PP in class A/B demonstration amplifiers.

"A number of very-high-efficiency amplifier architectures, routinely used at lower frequencies for audio and UHF applications, are being realized at much higher RF and microwave frequencies using GaN transistors," said Jim Milligan, Cree director for RF and microwave products. "Published research indicates greater than 80% PAE using Class D, E, F and J amplifier architectures, with Cree GaN HEMT transistors, at frequencies over 2 GHz. More-typical Class A/B operation can also offer exceptional efficiency, validated by the demonstrations we are giving this week. Cree GaN transistors offer system designers a wide range of choices, supporting diverse application requirements."

The CGH40120F and CGH40180F are the newest members of Cree's general-purpose transistor product family. Samples and fixtures are available through Digi-Key. Large-signal models for Agilent's ADS or AWR's MWO simulators are available directly from Cree.

About Cree
Cree is a market-leading innovator of semiconductor solutions for wireless and power applications, lighting-class LEDs, and LED lighting solutions.

Cree's product families include power-switching devices and radio-frequency/wireless devices, blue and green LED chips, high-brightness LEDs, lighting-class power LEDs, and LED fixtures and bulbs. Cree solutions are driving improvements in applications such as variable-speed motors, wireless communications, general illumination, backlighting and electronic signs and signals. For more information, visit: www.cree.com.

SOURCE: Cree, Inc.