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GaN-on-Si power devices have advantages in both performance and the potential for low cost and high volume production. Advances have been made in extended reliability tests exhibiting an intrinsic life time >106 hours for qualified 600-V GaN HEMT products. Experimental kV-class devices have shown CW operation at 800V with >99% efficiency at 100 kHz and a 2:1boost ratio. Both are exciting developments...
kV-class GaN high electron mobility transistors built on low-cost Si substrate have been developed with proven switching performance. These devices show a blocking voltage >1200 V, low on-resistance <0.19 Ω, and high switching speed >200 V/ns. A 3-kW 400 V:800 V hard-switched boost converter based on the GaN transistor achieves 99% efficiency at 100 kHz, well exceeding that of other competing...
We report operation of AlGaN laser diodes grown on semipolar buffer layers partially relaxed by misfit dislocation formation at heterointerfaces remote from the active region. This approach offers a pathway to mid-UV AlGaN based lasers.
Ga-polar InAlN-based charge-inducing barrier for HEMTs have been recently demonstrated as a viable technology for high frequency applications due to high polarization charge and hence, low resistance channels [1,2]. In this paper, we report on MBE-grown N-polar GaN/InAlN HEMTs with excellent DC and RF performance. There exists a discrepancy in the DC and RF data for N-polar MBE InAlN devices which...
We present the first 600V-class, total GaN solution for electrical power conversion applications. A 220V–400V boost converter using a GaN transistor and a GaN diode with fast & clean hard-switched waveforms has been demonstrated. The conversion efficiency was >99.1% at 100 kHz and >98.2% at 800 kHz.
GaN-based devices offer significant advantages for next generation military and commercial systems. Military systems benefit from high power densities of 4 to 7 W/mm depending on bias conditions along with efficiencies over 60% at frequencies through X-band, and commercial systems take advantage of excellent linearity as well. In this paper, we will review a number of commercial products that only...
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