MRF421 Datasheet, PDF (2/4 Pages) Motorola, Inc – RF POWER TRANSISTORS NPN SILICON

ELECTRICAL CHARACTERISTICS – continued (T_C = 25°C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
ON CHARACTERISTICS
DC Current Gain
(I_C = 5.0 Adc, V_CE = 5.0 Vdc)
h_FE
10
70
—
—
DYNAMIC CHARACTERISTICS
Output Capacitance
(V_CB = 12.5 Vdc, I_E = 0, f = 1.0 MHz)
C_ob
—
550
800
pF
FUNCTIONAL TESTS
Common–Emitter Amplifier Power Gain
(V_CC = 12.5 Vdc, P_out = 100 W, I_C(max) = 10 Adc,
I_CQ = 150 mAdc, f = 30, 30.001 MHz)
Collector Efficiency
(V_CC = 12.5 Vdc, P_out = 100 W, I_C(max) = 10 Adc,
I_CQ = 150 mA, f = 30, 30.001 MHz)
Intermodulation Distortion (1)
(V_CE = 12.5 Vdc, P_out = 100 W, I_C = 10 Adc,
I_CQ = 150 mA, f = 30, 30.001 MHz)
G_PE
10
12
—
dB
η
40
—
—
%
IMD
—
–33
–30
dB
NOTE:
1. To proposed EIA method of measurement. Reference peak envelope power.
R1
+
BIAS
CR1
-
RF
INPUT
C5
C6
L4
C2
L1
C1
R2
C7
L2
D.U.T.
C3
L5
C8
C9
C4
L3
+
C10
12.5 Vdc
-
RF
OUTPUT
C1, C2, C4 — 170ā–ā780 pF, ARCO 469
C3 — 80ā–ā480 pF, ARCO 466
C5, C7, C10 — ERIE 0.1 µF, 100 V
C6 — MALLORY 500 µF @ 15 V Electrolytic
C9 — 100 µF, 15 V Electrolytic
C8 — 1000 pF, 350 V UNDERWOOD
R1 — 10 Ω, 25 Watt Wirewound
R2 — 10 Ω, 1.0 Watt Carbon
CR1 — 1N4997
L1 — 3 Turns, #16 Wire, 5/16″ I.D., 5/16″ Long
L2 — 12 Turns, #16 Enameled Wire Closewound, 1/4″ I.D.
L3 — 1–3/4 Turns, 1/8″ Tubing, 3/8″ I.D., 3/8″ Long
L4 — 10 µH Molded Choke
L5 — 10 Ferrite Beads — FERROXCUBE #56–590–65/3B
Figure 1. 30 MHz Test Circuit Schematic
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