1
MRF847
MOTOROLA RF DEVICE DATA
The RF Line
NPN Silicon
RF Power Transistor
. . . designed for 12.5 volt UHF largesignal, commonbase amplifier applica-
tions in industrial and commercial FM equipment operating in the range of
806 960 MHz.
Specified 12.5 Volt, 870 MHz Characteristics
Output Power = 45 Watts
Power Gain = 4.5 dB Min
Efficiency = 60% Min
Series Equivalent LargeSignal Characterization
Internally Matched Input for Broadband Operation
Tested for Load Mismatch Stress at All Phase Angles with 10:1 VSWR @
High Line and Rated Drive
Gold Metallized, Emitter Ballasted for Long Life and Resistance to Metal
Migration
Silicon Nitride Passivated
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
CollectorEmitter Voltage
VCEO
16.5
Vdc
CollectorBase Voltage
VCBO
38
Vdc
EmitterBase Voltage
VEBO
4.0
Vdc
Collector Current -- Continuous
IC
12
Adc
Total Device Dissipation @ TA = 25
C
Derate above 25
C
PD
150
0.85
Watts
W/
C
Storage Temperature Range
Tstg
65 to +150
C
Junction Temperature
TJ
200
C
THERMAL CHARACTERISTICS
Characteristic
Symbol
Max
Unit
Thermal Resistance, Junction to Case
R
JC
1.17
C/W
ELECTRICAL CHARACTERISTICS
(TC = 25
C unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
OFF CHARACTERISTICS
EmitterBase Breakdown Voltage
(IE = 5.0 mAdc, IC = 0)
V(BR)EBO
4.0
--
--
Vdc
CollectorEmitter Breakdown Voltage
(IC = 50 mAdc, IB = 0)
V(BR)CEO
16.5
--
--
Vdc
CollectorEmitter Breakdown Voltage
(IC = 50 mAdc, VBE = 0)
V(BR)CES
38
--
--
Vdc
Collector Cutoff Current
(VCE = 15 Vdc, VBE = 0)
ICES
--
--
10
mAdc
(continued)
Order this document
by MRF847/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MRF847
45 W, 870 MHz
RF POWER
TRANSISTOR
NPN SILICON
CASE 31907, STYLE 1
Motorola, Inc. 1994
MRF847
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 = 2.0 Adc, VCE = 5.0 Vdc)
hFE
40
65
120
--
DYNAMIC CHARACTERISTICS
Output Capacitance
(VCB = 12.5 Vdc, IE = 0, f = 1.0 MHz)
Cob
--
75
90
pF
FUNCTIONAL TESTS
CommonBase Amplifier Power Gain
(VCC = 12.5 Vdc, Pout = 45 W, f = 870 MHz)
GPB
4.5
5.5
--
dB
Collector Efficiency
(VCC = 12.5 Vdc, Pout = 45 W, f = 870 MHz)
c
60
68
--
%
Load Mismatch
(VCC = 15.5 Vdc, Pin = 16 W, f = 870 MHz,
VSWR = 10:1, All Phase Angles)
No Degradation in Output Power
Figure 1. 806 870 MHz Broadband Test Circuit
C1 -- 51 pF, 100 mil Chip Capacitor
C2 -- 12 pF, MiniUnderwood
C3 -- 11 pF, MiniUnderwood
C4, C5 -- 21 pF, MiniUnderwood
C6 -- 0.08 8.0 pF Johansen Gigatrim
C7 -- 47 pF, 100 mil Chip Capacitor
C8, C13 -- 10
F, 25 WV Electrolytic Capacitor
C9, C12 -- 1000 pF Unelco J101
C10, C11 -- 91 pF MiniUnderwood
L1, L2 -- 4 Turns #18 Enameled, 200 mil ID
L3, L4 -- 12 Turns #22 Enameled, Wound Over 10
Resistor
TL1, TL4 -- 50
Microstrip Line
TL2 -- Microstrip (Zo = 38 ohms,
/4 @ 838 MHz)
TL3 -- Microstrip (Zo = 28 ohms,
/4 @ 838 MHz)
Board Material -- 0.032
GlassTeflon, 2 oz. cu. clad,
r = 2.56
B -- Ferrite Bead, Ferroxcube 56590653B
Vre PORT
SOCKET ASSY.
C1
C10
D.U.T.
B
+
+12.5 V
50
TL1
TL2
TL3
TL4
+
50
L3
C8
C9
L1
C3
C4
C2
C5
C6
C7
C11
C12
C13
B
L4
L2
3
MRF847
MOTOROLA RF DEVICE DATA
Figure 2. Output Power versus Input Power
Figure 3. Output Power versus Frequency
Figure 4. Output Power versus Supply Voltage
Figure 5. Typical Broadband Circuit Performance
Figure 6. Series Equivalent Input/Output Impedances
50
40
30
20
820
f, FREQUENCY (MHz)
P
, OUTPUT
POWER (W
A
TTS)
out
800
840
860
880
900
VCC = 12.5 V
Pin = 16 W
60
70
920
940
960
50
40
30
20
P
, OUTPUT
POWER (W
A
TTS)
out
60
70
10
0
20
16
12
8
4
Pin, INPUT POWER (WATTS)
f = 806 MHz
VCC = 12.5 V
870 MHz
960 MHz
f = 870 MHz
Pin = 16 W
12 W
8 W
50
40
30
20
10
16
14
12
10
8
6
VCC, SUPPLY VOLTAGE (VOLTS)
P
, OUTPUT
POWER (W
A
TTS)
out
60
70
80
820
f, FREQUENCY (MHz)
800
840
860
880
900
G
PB
, POWER GAIN (dB)
6.5
5.5
4.5
3.5
2.5
1.5
VCC = 12.5 V
Pin = 16 W
c
, COLLECT
OR EFFICIENCY
80
70
60
50
40
30
20
10
1.6:1
1.4:1
1.2:1
GPB
c
INPUT VSWR
12 W
8 W
f = 960 MHz
ZOL*
Zin
806
838
870
f = 806 MHz
960
915
915
870
838
Zo = 10
f
MHz
Zin
(Ohms)
ZOL*
(Ohms)
806
0.99
0.67
f
MHz
806
+j5.52
+j1.33
ZOL* = Conjugate of the optimum load impedance into which the
ZOL* =
device output operates at a given output power, voltage and
ZOL* =
frequency.
VCC = 12.5 Vdc, Pin = 16 W, Pout = 45 W
838
1.48
0.68
838
+j5.47
+j1.66
870
1.79
0.72
870
+j5.25
+j2.16
915
2.12
0.83
915
+j4.80
+j2.40
960
2.11
0.99
960
+j4.28
+j2.50
MRF847
4
MOTOROLA RF DEVICE DATA
PACKAGE DIMENSIONS
CASE 31907
ISSUE M
0.965
0.355
0.230
0.115
0.102
0.075
0.160
0.004
0.090
0.225
0.125
0.985
0.375
0.260
0.125
0.114
0.085
0.170
0.006
0.110
0.241
0.135
24.52
9.02
5.85
2.93
2.59
1.91
4.07
0.11
2.29
5.72
3.18
25.01
9.52
6.60
3.17
2.90
2.15
4.31
0.15
2.79
6.12
3.42
M
M
MIN
MIN
MAX
MAX
INCHES
MILLIMETER
DIM
A
B
C
D
E
F
H
J
K
L
N
Q
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
0.725 BSC
18.42 BSC
SEATING
PLANE
IDENTIFICATION
NOTCH
1
2
3
4
5
6
F
J
B
H
E
K
L
0.15 (0.006)
T A
N
M
-A-
-N-
-T-
Q
2 PL
D
2 PL
M
M
0.38 (0.015)
T
A
N
M
M
M
0.38 (0.015)
T
A
N
M
C
PIN 1. BASE (COMMON)
2. EMITTER (INPUT)
3. BASE (COMMON)
4. BASE (COMMON)
5. COLLECTOR (OUTPUT)
6. BASE (COMMON)
STYLE 1:
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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systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of
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unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless
against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
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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are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
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MRF847/D
*MRF847/D*
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