NPT2020_15 Datasheet, PDF (9/13 Pages) M/A-COM Technology Solutions, Inc. – GaN Wideband Transistor 48 V, 50 W

NPT2020
GaN Wideband Transistor 48 V, 50 W
DC - 3.5 GHz
Evaluation Board and Recommended Tuning Solution
1250-1850 MHz Broadband Circuit
Rev. V1
V_GS
L1
27 nH
C4
10 μF
C3
47 pF
R1
110 Ω
C6 C5
R2
C9
47 pF 47 pF 0.33 Ω 100 μF
V_DS
C7
1 μF
C8
4.7 μF
RF_IN
C13 C1
0.2 pF 2.7 pF
C2
27 pF
C10
C12
3.9 pF 0.5 pF
NPT2020
C11
39 pF
RF_OUT
Description
Parts measured on evaluation board (25-mil thick
6010LM). Matching is provided using a
combination of lumped elements and transmission
lines as shown in the simplified schematic above.
Recommended tuning solution component
placement, transmission lines, and details are
shown on the next page.
Bias Sequencing
Turning the device ON
1. Set V_GS to the pinch-off (V_P), typically -5 V.
2. Turn on V_DS to nominal voltage (48 V).
3. Increase V_GS until the I_DS current is reached.
4. Apply RF power to desired level.
Turning the device OFF
1. Turn the RF power off.
2. Decrease V_GS down to V_P.
3. Decrease V_DS down to 0 V.
4. Turn off V_GS.
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