1
MRF644
MOTOROLA RF DEVICE DATA
The RF Line
NPN Silicon
RF Power Transistor
. . . designed for 12.5 Volt UHF largesignal amplifier applications in industrial
and commercial FM equipment operating to 512 MHz.
Specified 12.5 Volt, 470 MHz Characteristics --
Output Power = 25 Watts
Minimum Gain = 6.2 dB
Efficiency = 60%
Characterized with Series Equivalent LargeSignal Impedance Parameters
BuiltIn Matching Network for Broadband Operation
Tested for Load Mismatch Stress at all Phase Angles with 20:1 VSWR @
16Volt High Line and 50% Overdrive
Circuit board photomaster available upon request by
contacting RF Tactical Marketing in Phoenix, AZ.
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
CollectorEmitter Voltage
VCEO
16
Vdc
CollectorBase Voltage
VCBO
36
Vdc
EmitterBase Voltage
VEBO
4.0
Vdc
Collector Current -- Continuous
IC
4.0
Adc
Total Device Dissipation @ TC = 25
C
Derate above 25
C
PD
103
0.59
Watts
W/
C
Storage Temperature Range
Tstg
65 to +150
C
THERMAL CHARACTERISTICS
Characteristic
Symbol
Max
Unit
Thermal Resistance, Junction to Case
R
JC
1.7
C/W
ELECTRICAL CHARACTERISTICS
(TC = 25
C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
OFF CHARACTERISTICS
CollectorEmitter Breakdown Voltage
(IC = 20 mAdc, IB = 0)
V(BR)CEO
16
--
--
Vdc
CollectorEmitter Breakdown Voltage
(IC = 20 mAdc, VBE = 0)
V(BR)CES
36
--
--
Vdc
EmitterBase Breakdown Voltage
(IE = 5.0 mAdc, IC = 0)
V(BR)EBO
4.0
--
--
Vdc
Collector Cutoff Current
(VCE = 15 Vdc, VBE = 0, TC = 25
C)
ICES
--
--
5.0
mAdc
(continued)
Order this document
by MRF644/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MRF644
25 W, 470 MHz
CONTROLLED Q
RF POWER
TRANSISTOR
NPN SILICON
CASE 31601, STYLE 1
Motorola, Inc. 1994
REV 6
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)
hFE
40
70
100
--
DYNAMIC CHARACTERISTICS
Output Capacitance
(VCB = 12.5 Vdc, IE = 0, f = 1.0 MHz)
Cob
--
60
85
pF
FUNCTIONAL TESTS
CommonEmitter Amplifier Power Gain
(VCC = 12.5 Vdc, Pout = 25 W, IC (MAX) = 3.6 Adc, f = 470 MHz)
Gpe
6.2
7.0
--
dB
Input Power
(VCC = 12.5 Vdc, Pout = 25 W, f = 470 MHz)
Pin
--
5.0
6.0
Watts
Collector Efficiency
(VCC = 12.5 Vdc, Pout = 25 W, IC (MAX) = 3.6 Adc, f = 470 MHz)
55
60
--
%
Output Mismatch Stress
(VCC = 16 Vdc, Pin = Note 1, f = 470 MHz,
VSWR = 20:1, All Phase Angles)
*
No Degradation in Output Power
Series Equivalent Input Impedance
(VCC = 12.5 Vdc, Pout = 25 W, f = 470 MHz)
Zin
--
1.2 + j3.3
--
Ohms
Series Equivalent Output Impedance
(VCC = 12.5 Vdc, Pout = 25 W, f = 470 MHz)
ZOL
--
1.9 + j2.1
--
Ohms
NOTE:
1. Pin = 150% of Drive Requirement for 25 W Output at 12.5 Vdc.
*
= 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.
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
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 VK200204B
B -- Ferroxcube Bead 56590653B
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,
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.
3
MRF644
MOTOROLA RF DEVICE DATA
P
, minus P out
in
(W
A
TTS)
Figure 2. Power Output versus Power Input
Figure 3. Power Output versus Frequency
Figure 4. Power Output versus Supply Voltage
Figure 5. Power Saturation Profile
Figure 6. Series Equivalent InputOutput Impedance
P
, POWER OUTPUT
(W
A
TTS)
out
P
, POWER OUTPUT
(W
A
TTS)
out
P
, POWER OUTPUT
(W
A
TTS)
out
VCC, SUPPLY VOLTAGE (VOLTS)
40
4
10
30
20
0
6
8
10
12
14
16
18
20
Pin, POWER INPUT (WATTS)
40
1
10
30
20
0
2
3
4
5
6
7
8
9
f, FREQUENCY (MHz)
460
480
500
520
440
40
10
30
20
0
Pin, POWER INPUT (WATTS)
2
1
40
10
30
20
0
3
4
5
6
7
8
9
Pin = 8 W
VCC = 13.6 V
6 W
f = 470 MHz
12.5 V
VCC = 12.5 V
f = 470 MHz
Pin = 6 W
f = 470 MHz
VCC = 13.6 V
12.5 V
0
20
5.0
10
15
20
15
10
5.0
5.0
f = 450 MHz
470
25
10
f = 450 MHz
512
512
ZOL*
Zin
FREQUENCY
MHz
Zin
(OHMS)
ZOL*
(OHMS)
450
470
512
1.21 + j3.47
1.21 + j3.25
1.06 + j2.09
1.76 + j1.96
1.90 + j2.14
1.96 + j2.34
ZOL* = Conjugate of the optimum load impedance into which the device output
operates at a given output power, voltage and frequency.
MRF644
4
MOTOROLA RF DEVICE DATA
PACKAGE DIMENSIONS
CASE 31601
ISSUE D
NOTES:
1. FLANGE IS ISOLATED IN ALL STYLES.
STYLE 1:
PIN 1. EMITTER
2. COLLECTOR
3. EMITTER
4. BASE
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
24.38
25.14
0.960
0.990
B
12.45
12.95
0.490
0.510
C
5.97
7.62
0.235
0.300
D
5.33
5.58
0.210
0.220
E
2.16
3.04
0.085
0.120
F
5.08
5.33
0.200
0.210
H
18.29
18.54
0.720
0.730
J
0.10
0.15
0.004
0.006
K
10.29
11.17
0.405
0.440
L
3.81
4.06
0.150
0.160
N
3.81
4.31
0.150
0.170
Q
2.92
3.30
0.115
0.130
R
3.05
3.30
0.120
0.130
U
11.94
12.57
0.470
0.495
4
3
2
1
F
D
R
Q
L
K
E
J
B
A
H
N
C
U
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do vary in different
applications. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does
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associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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MRF644/D
*MRF644/D*
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