ARF448A_03 Datasheet, PDF (3/4 Pages) Advanced Power Technology – N-CHANNEL ENHANCEMENT MODE

ARF448A/448B
1.2
1.1
1.0
0.9
0.8
0.7
0.6
-50 -25 0 25 50 75 100 125 150
T_C, CASE TEMPERATURE (°C)
Figure 5, Typical Threshold Voltage vs Temperature
300
Class C
V_DD = 150V
240 f = 40.68 MHz
180
120
60
40
VGS=8, 10 & 15V
30
6.5V
20
6V
5.5V
10
5V
4.5V
0
1
5
10 15 20 25 30
V_DS, DRAIN-TO-SOURCE VOLTAGE (VOLTS)
Figure 6, Typical Output Characteristics
17
Class C
V_DD = 150V
16 f = 40.68 MHz
15
14
0
0
2
4
6
8
10
P_IN, POWER IN (WATTS)
Figure 7, Typical Power Out vs Power In
13
0
60
120 180 240 300
P_OUT, POWER OUT (WATTS)
Figure 8, Typical Common Source Amplifier Gain vs Power Out
0.6
0.1
0.05
0.01
0.005
0.001
10^-5
D=0.5
0.2
0.1
0.05
0.02
0.01
SINGLE PULSE
Note:
t1
t2
Duty Factor D = ^t1/t2
Peak TJ = PDM x Z_qJC + TC
10^-4
10^-3
10^-2
10^-1
1.0
10
RECTANGULAR PULSE DURATION (SECONDS)
Figure 9, Typical Maximum Effective Transient Thermal Impedance, Junction-To-Case vs Pulse Duration
Table 1 - Typical Class C Large Signal Input-Output Impedance
Freq. (MHz)
Z_in (W)
Z_OL (W)
2.0
20.90 - j 9.2
56.00 - j 06.0
13.5
2.40 - j 6.8
37.00 - j 26.0
27.0
0.57 - j 2.6
18.00 - j 25.0
40.0
0.31 - j 0.5
9.90 - j 19.2
65.0
0.44 + j 1.9
4.35 - j 11.4
Z_in - gate shunted by 25W
Z_OL - conjugate of optimum load impedance for 250W at 150V