GSWP100W-EVBPA
GaN E-HEMT Wireless Power Transfer Evaluation Board
User’s Guide
_____________________________________________________________________________________________________________________
GSWP100W-EVBPA Rev 180529
© 2018 GaN Systems Inc.
www.gansystems.com 20
Please refer to the Evaluation Board/Kit Important Notice on page 26
Figure 19 •
Spectrum Plot of output terminal JP56 SMA after 49.66dB attenuation at 100W output power
Figure 20 •
Output power and efficiency of PA without EMI filter
at JP56 SMA
Note: With the
EMI filter, the maximum power level is limited to 80W, due to the 50Ω test.
The PA’s system reliability is optimized when the temperature rise of each device is kept to a minimum,
including that of the GaN E-HEMTs. The GS61008Ps are especially well suited in this regard, for a
number of reasons. First, they have very low switching losses which allows them to operate at high
efficiency and a low temperature rise at 6.78MHz, the common frequency used for resonant wireless
50.0%
55.0%
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
0
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Eff(
%)
Po
ut
(W
)
Vin(V)
100W WPT PA Pout(W) & Efficiency(%) without EMI filter
Pout(W)
Eff(%)
