MA-COM MRF455

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by MRF455/D
SEMICONDUCTOR TECHNICAL DATA
The RF Line
. . . designed for power amplifier applications in industrial, commercial and
amateur radio equipment to 30 MHz.
• Specified 12.5 Volt, 30 MHz Characteristics —
Output Power = 60 Watts
Minimum Gain = 13 dB
Efficiency = 55%
60 W, 30 MHz
RF POWER
TRANSISTOR
NPN SILICON
MATCHING PROCEDURE
In the push–pull circuit configuration it is preferred that the transistors are
used as matched pairs to obtain optimum performance.
The matching procedure used by M/A-COM consists of measuring h FE at the
data sheet conditions and color coding the device to predetermined hFE ranges
within the normal hFE limits. A color dot is added to the marking on top of the cap.
Any two devices with the same color dot can be paired together to form a
matched set of units.
MAXIMUM RATINGS
Symbol
Value
Unit
Collector–Emitter Voltage
Rating
VCEO
18
Vdc
Collector–Emitter Voltage
VCES
36
Vdc
Emitter–Base Voltage
VEBO
4.0
Vdc
Collector Current — Continuous
IC
15
Adc
Total Device Dissipation @ TC = 25°C
Derate above 25°C
PD
175
1.0
Watts
W/°C
Storage Temperature Range
Tstg
–65 to +150
°C
CASE 211–07, STYLE 1
THERMAL CHARACTERISTICS
Characteristic
Thermal Resistance, Junction to Case
Symbol
Max
Unit
RθJC
1.0
°C/W
ELECTRICAL CHARACTERISTICS (TC = 25°C unless otherwise noted.)
Symbol
Min
Typ
Max
Unit
Collector–Emitter Breakdown Voltage
(IC = 100 mAdc, IB = 0)
V(BR)CEO
18
—
—
Vdc
Collector–Emitter Breakdown Voltage
(IC = 50 mAdc, VBE = 0)
V(BR)CES
36
—
—
Vdc
Emitter–Base Breakdown Voltage
(IE = 10 mAdc, IC = 0)
V(BR)EBO
4.0
—
—
Vdc
hFE
10
—
150
—
Cob
—
—
250
pF
Characteristic
OFF CHARACTERISTICS
ON CHARACTERISTICS
DC Current Gain
(IC = 5.0 Adc, VCE = 5.0 Vdc)
DYNAMIC CHARACTERISTICS
Output Capacitance
(VCB = 12.5 Vdc, IE = 0, f = 1.0 MHz)
(continued)
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ELECTRICAL CHARACTERISTICS — continued (TC = 25°C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Common–Emitter Amplifier Power Gain
(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)
Gpe
13
—
—
dB
Collector Efficiency
(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)
η
55
—
—
%
Series Equivalent Input Impedance
(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)
Zin
—
1.66–j.844
—
Ohms
Series Equivalent Output Impedance
(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)
Zout
—
1.73–j.188
—
Ohms
Parallel Equivalent Input Impedance
(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)
Zin
—
2.09/1030
—
Ω/pF
Parallel Equivalent Output Impedance
(VCC = 12.5 Vdc, Pout = 60 W, f = 30 MHz)
Zout
—
1.75/330
—
Ω/pF
FUNCTIONAL TESTS (Figure 1)
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L1 — 3 Turns, #18 AWG, 5/16″ I.D., 5/16″ Long
L2 — VK200–20/4B, FERROXCUBE
L3 — 12 Turns, #18 AWG Enameled Wire, 1/4″ I.D., Close Wound
L4 — 3 Turns 1/8″ O.D. Copper Tubing, 3/8″ I.D., 3/4″ Long
L5 — 7 FERRITE Beads, FERROXCUBE #56–590–65/3B
C1, C2, C4 — ARCO 469
C3 — ARCO 466
C5 — 1000 pF, UNELCO
C6, C7 — 0.1 µF Disc Ceramic
C8 — 1000 µF/15 V Electrolytic
R1 — 10 Ohm/1.0 Watt, Carbon
Figure 1. 30 MHz Test Circuit Schematic
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Figure 2. Output Power versus Input Power
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Figure 3. Output Power versus Supply Voltage
PACKAGE DIMENSIONS
A
U
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M
Q
R
S
B
D
K
J
H
C
E
CASE 211–07
ISSUE N
Specifications subject to change without notice.
n North America: Tel. (800) 366-2266, Fax (800) 618-8883
n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
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