參數(shù)資料
型號(hào)： MRF644
廠商： MOTOROLA INC
元件分類： 功率晶體管
英文描述： RF POWER TRANSISTOR NPN SILICON
中文描述： UHF BAND, Si, NPN, RF POWER TRANSISTOR
文件頁(yè)數(shù)： 2/4頁(yè)
文件大小： 99K
代理商： MRF644
MRF644
2
MOTOROLA RF DEVICE DATA
ELECTRICAL CHARACTERISTICS — continued
(TC = 25
°
C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
ON CHARACTERISTICS
DC Current Gain
(IC = 4.0 Adc, VCE = 5.0 Vdc)
DYNAMIC CHARACTERISTICS
hFE
40
70
100
—
Output Capacitance
(VCB = 12.5 Vdc, IE = 0, f = 1.0 MHz)
FUNCTIONAL TESTS
Cob
—
60
85
pF
Common–Emitter Amplifier Power Gain
(VCC = 12.5 Vdc, Pout = 25 W, IC (MAX) = 3.6 Adc, f = 470 MHz)
Input Power
(VCC = 12.5 Vdc, Pout = 25 W, f = 470 MHz)
Collector Efficiency
(VCC = 12.5 Vdc, Pout = 25 W, IC (MAX) = 3.6 Adc, f = 470 MHz)
Output Mismatch Stress
(VCC = 16 Vdc, Pin = Note 1, f = 470 MHz,
VSWR = 20:1, All Phase Angles)
Gpe
6.2
7.0
—
dB
Pin
—
5.0
6.0
Watts
η
55
60
—
%
ψ
*
No Degradation in Output Power
Series Equivalent Input Impedance
(VCC = 12.5 Vdc, Pout = 25 W, f = 470 MHz)
Series Equivalent Output Impedance
(VCC = 12.5 Vdc, Pout = 25 W, f = 470 MHz)
NOTE:
1. Pin = 150% of Drive Requirement for 25 W Output at 12.5 Vdc.
*
ψ
= Mismatch stress factor — the electrical criterion established to verify the device resistance to load mismatch failure. The mismatch stress
test is accomplished in the standard test fixture (Figure 1) terminated in a 20:1 minimum load mismatch at all phase angles.
Zin
—
1.2 + j3.3
—
Ohms
ZOL
—
1.9 + j2.1
—
Ohms
Figure 1. Test Circuit Schematic
C1, C2, C7, C8 — 1.0–20 pF Johanson Variable
C3 — 27 pF 100 mil ATC
C4 — 30 pF 100 mil ATC
C5, C6 — 33 pF 100 mil ATC
C9 — 250 pF 100 mil ATC
C10 — 100 pF UNELCO
C11, C14 — 1.0
μ
F 35 V TANTALUM
C12, C13 — 680 pF Feedthrough
L1 — 5
″
#22 AWG 0.100
″
ID
L2 — 5
″
#20 AWG 0.187
″
ID
RFC1 — Ferroxcube VK200–20–4B
B — Ferroxcube Bead 56–590–65–3B
Z1 — 0.25
″
x 0.20
″
Microstrip
Z2 — 1.63
″
x 0.20
″
Microstrip
Z3 — 0.20
″
x 0.20
″
Microstrip
Z4, Z5 — 1/2
″
#18 AWG bent in a
Z4, Z5 —
“V” shape 1/8
″
Wide
Z6 — 0.20
″
x 0.20
″
Microstrip
Z7 — 0.70
″
x 0.20
″
Microstrip
Z8 — 0.33
″
x 0.20
″
Microstrip
Z9 — 0.50
″
x 0.20
″
Microstrip
Board — 62.5 mil Glass Teflon,
ε
r = 2.55
RFC1
B
C1
C10
Z1
Z2
Z3
Z4
Z5
Z6
Z7
Z8
Z9
C2
C3
C5
C7
C8
C9
C4
C6
L1
C11
C12 C13
C14
B
L2
SOCKET
D.U.T.
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