1/9June 2004
SD1477
RF POWER BIPOLAR TRANSISTORS
VHF MOBILE APPLICATIONS
REV. 2
FEATURES SUMMARY
■175 MHz
■12.5 VOLTS
■COMMON EMITTER
■POUT = 100 W MIN. WITH 6.0 dB GAIN
DESCRIPTION
The SD1477 is a 12.5 V Class C epitaxial silicon
NPN planar transistor designed primarily for VHF
FM communications. This device utilizes diffused
emitter resistors to withstand extremely high
VSWR under rated operating conditions, and is in-
ternally input matched to optimize power gain and
efficiency over the 136 - 175 MHz band.
Figure 1. Package
Figure 2. Pin Connection
Table 1. Order Codes
.500 6L FL (M111)
epoxy sealed
1. Collector 3. Emitter
2. Base 4. Emitter
Order Codes Marking Package Packaging
SD1477 SD1477 M111 PLASTIC TRAYS
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Table 2. Absolute Maximum Ratings (Tcase = 25°C)
Table 3. Thermal Data
ELECTRICAL SPECIFICATIONS (Tcase = 25°C)
Table 4. Static
Table 5. Dynamic
Symbol Parameter Value Unit
VCBO Collector-Base Voltage 36 V
VCEO Collector-Emitter Voltage 18 V
VCES Collector-Emitter Voltage 36 V
VEBO Emitter-Base Voltage 4.0 V
IC Device Current 20 A
PDISS Power Dissipation 270 W
TJ Junction Temperature +200 °C
TSTG Storage Temperature – 65 to +150 °C
Symbol Parameter Value Unit
RTH(j-c) Junction-Case Thermal Resistance 0.65 °C/W
Symbol Test Conditions
Value
Unit
Min. Typ. Max.
BVCBO IC = 50 mA; IE = 0 mA 36 — — V
BVCES IC = 100 mA; VBE = 0 V 36 — — V
BVCEO IC = 100 mA; IB = 0 mA 18 — — V
BVEBO IE = 10 mA; IC = 0 mA 4.0 — — V
ICES VCE = 15 V; IE = 0 mA — — 15 mA
hFE VCE = 5 V; IC = 5 A 10 — — —
Symbol Test Conditions
Value
Unit
Min. Typ. Max.
POUT f = 175 MHz; PIN = 25 W; VCC = 12.5 V 100 — — W
GPf = 175 MHz; PIN = 25 W; VCC = 12.5 V 6.0 — — dB
COB f = 1 MHz; VCB = 12.5 V — 350 — pF
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SD1477
TYPICAL PERFORMANCE
Figure 3. Power Output vs Frequency Figure 4. Power Output vs Power Input
120
100
80
60
40
20
130 140 150 160 170 180
Power Output (watts)
Frequency (MHz)
VCC = 12.5 V
PIN = 25 W
PIN = 20 W
PIN = 15 W
PIN = 10 W
120
100
80
60
40
20
0
0 5 10 15 20 25
Power Output (watts)
Power Input (Watts)
VCC = 12.5 V 136 MHz
175 MHz
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IMPEDANCE DATA
Figure 5. Typical Input Impedance Figure 6. Typical Collector Load Impedance
Table 6. Impedance Data
+2
+1
0
–1
–2
130 140 150 160 170 180 190
Source Impedance (ohms)
Power Input (Watts)
R
Jx
VCC = 136 MHz
PIN = 20.0 W
Input
Network
Zs
+1.0
+.5
0
–.5
–1.0
130 140 150 160 170 180
Collector Load Impedance (ohms)
Frequency (MHz)
R
Jx
VCC = 12.5 V
PIN = 20 W
ZCL
Output
Network
FREQ. ZIN (Ω)Z
CL (Ω)
175 MHz 1.5 – j 0.9 0.5 – j 1.0
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SD1477
TEST CIRCUIT
Figure 7. Test Circuit
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Table 7. Test Circuit
Figure 8. Test Circuit
C1, C2 Arco 462 5 - 80pF
C3, C4 Unelco 100pF, 350V
C5, C6 Unelco 120pF, 350V
C7, C8 Arco 463 9 - 180pF
C9, C12 Unelco 1000pF, 350V
C10 Erie .15µF, 200V Red Cap
C11 25µF, 25V Electrolytic
C13 10µF, 25V Electrolytic
L1 1 Turn, #12, 1/4" I.D.
L2, L3 1/2" 50Ω Stripline (.180" Wide)
L4 1/8" Thick Copper Strap 1/4" Wide
RCF1 1 1/2 Turns on Ferroxcube VK200/19-B
RCF2 4 Turn #16 Enamel, 3/8" I.D., 3/8" Long
RCF3 4 Turns #16 Enamel on T50-2 Torroid
Board Material 3M-K6098, 1/16" Thick
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SD1477
PACKAGE MECHANICAL
Table 8. M111 Mechanical Data
Figure 9. M111 Package Dimensions
Note: Drawing is not to scale.
Symbol millimeters inches
Min Typ Max Min Typ Max
A 3.43 4.06 0.150 0.160
B 1.14 0.045
C 5.33 5.59 0.210 0.220
D 21.21 21.97 0.835 0.865
E 5.08 5.33 0.200 0.210
F 12.45 12.95 0.490 0.510
G 0.08 0.18 0.003 0.007
H 3.18 0.125
I 18.29 18.54 0.720 0.730
J 24.64 24.89 0.970 0.980
K 2.41 2.67 0.095 0.105
L 3.81 4.32 0.150 0.170
M 7.11 0.280
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REVISION HISTORY
Table 9. Revision History
Date Revision Description of Changes
November-1992 1 First Issue
7-June-2004 2 Stylesheet update. No content change.
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SD1477
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of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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