STMICROELECTRONICS SD1446

SD1446
RF & MICROWAVE TRANSISTORS
HF/VHF APPLICATIONS
..
..
..
50 MHz
12.5 VOLTS
EFFICIENCY 55%
COMMON EMITTER
GOLD METALLIZATION
P OUT = 70 W MIN. WITH 10 dB GAIN
.380 4LFL (M113)
epoxy sealed
ORDER CODE
SD1446
BRANDING
SD1446
PIN CONNECTION
DESCRIPTION
The SD1446 is a 12.5 V Class C epitaxial silicon
NPN planar transistor designed primarily for land
mobile transmitter applications. This device utilizes
emitter ballasting and is extremely stable and capable of withstanding high VSWR under operating
conditions.
1. Collector
2. Emitter
3. Base
4. Emitter
ABSOLUTE MAXIMUM RATINGS (T case = 25 ° C)
Symbol
Parameter
Value
Unit
VCBO
Collector-Base Voltage
36
V
VCEO
Collector-Emitter Voltage
18
V
VEBO
Emitter-Base Voltage
3.5
V
Device Current
12.0
A
Power Dissipation
183
W
TJ
Junction Temperature
+200
°C
T STG
Storage Temperature
− 65 to +150
°C
1.05
°C/W
IC
PDISS
THERMAL DATA
RTH(j-c)
Junction-Case Thermal Resistance
November 1992
1/5
SD1446
ELECTRICAL SPECIFICATIONS (T case = 25 ° C)
STATIC
Symbol
Value
Test Conditions
Min.
Typ.
Max.
Unit
BVCBO
IC = 50mA
IE = 0mA
36
—
—
V
BVCES
IC = 100mA
VBE = 0V
36
—
—
V
BVCEO
IC = 50mA
IB = 0mA
18
—
—
V
BVEBO
IE = 10mA
IC = 0mA
3.5
—
—
V
ICES
VCE = 15V
IE = 0mA
—
—
10
mA
hFE
VCE = 5V
IC = 5A
10
—
—
—
DYNAMIC
Symbol
Value
Test Conditions
Typ.
Max.
Unit
POUT
f = 50 MHz
PIN = 7 W
VCE = 12.5 V
70
—
—
W
GP
ηc
f = 50 MHz
PIN = 7 W
VCE = 12.5 V
10
—
—
dB
f = 50 MHz
PIN = 7 W
VCE = 12.5 V
—
55
—
%
COB
f = 1 MHz
VCB = 12.5V
—
—
300
pF
TYPICAL PERFORMANCE
POWER OUTPUT vs POWER INPUT
2/5
Min.
SD1446
IMPEDANCE DATA
TYPICAL INPUT
IMPEDANCE
FREQ.
50 MHz
ZIN (Ω)
0.8 + j 0.9
Z CL (Ω)
1.2 + j 0.6
POUT = 70W
VCE = 12.5V
TYPICAL COLLECTOR
LOAD IMPEDANCE
3/5
SD1446
TEST CIRCUIT
4/5
C1, C4
C2
C3
C5
C6
C7
C8
:
:
:
:
:
:
:
50 - 380pF Arco 465
110 - 580pF Arco 467
140 - 680pF Arco 468
9 - 180pF Arco 463
10µF, 35Vdc, Electrolytic
.01µF Erie
1000pF Unelco
L1
: 2 1/2 Turns, #14 Awg, Tinned, 1/4” I.D.
Loose Wound
L2
L3
L4
L5
: 10 Turns, #28 AWG, Enameled on
Ferroxcube Sleeve #3B
: 1 1/2 Turns, #12 AWG, Tinned, 3/8” I.D.
Loose Wound
: 8 Turns, #18 AWG on 1/4” I.D. Coil form 1/2”
Length with Ferrite Slug
: 11 Turns, #16 AWG, Enameled on Torroid,
Micrometals, T50-2
Board Material: Double Sided Copper 1/16” Thick
SD1446
PACKAGE MECHANICAL DATA
Ref.: Dwg. No.12-0113
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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