HF SSB APPLICATIONS
RF & MICROWAVE TRANSISTORS
.550 4LFL (M177)
epoxy sealed
.
OPTIMIZED FOR SSB
.
30 MHz
.
50 VOLTS
.
IMD
-
30 dB
.
GOLD METALLIZATION
.
COMMON EMITTER
.
P
OUT
=
250 W PEP WITH 14.5 dB GAIN
DESCRIPTION
The SD1728 is a 50 V epitaxial silicon NPN planar
transistor designed primarily for SSB and VHF
communications. This device utilizes emitter bal-
lasting for improved ruggedness and reliability.
PIN CONNECTION
BRANDING
TH430
ORDER CODE
SD1728
ABSOLUTE MAXIMUM RATINGS (T
case
=
25
C)
Symbol
Parameter
Value
Uni t
V
CBO
Collector-Base Voltage
110
V
V
CEO
Collector-Emitter Voltage
55
V
V
EBO
Emitter-Base Voltage
4.0
V
I
C
Device Current
40
A
P
DISS
Power Dissipation
330
W
T
J
Junction Temperature
+200
C
T
STG
Storage Temperature
-
65 to +150
C
R
TH(j-c)
Junction-Case Thermal Resistance
0.4
C/W
SD1728 (TH430)
1. Collector
3. Base
2. Emitter
4. Emitter
THERMAL DATA
November 1992
1/9
ELECTRICAL SPECIFICATIONS (T
case
=
25
C)
Symbol
Test Conditi ons
Value
Uni t
Min.
Typ.
Max.
P
OUT
f
=
30 MHz
V
CC
=
50 V
I
CQ
=
150 mA
250
--
--
W
G
P
*
P
OUT
=
250 W PEP
V
CC
=
50 V
I
CQ
=
150 mA
14.5
--
--
dB
IMD*
P
OUT
=
250 W PEP
V
CC
=
50 V
I
CQ
=
150 mA
--
--
-
30
dBc
c*
P
OUT
=
250 W PEP
V
CC
=
50 V
I
CQ
=
150 mA
37
--
--
%
C
OB
f
=
1 MHz
V
CB
=
50 V
--
--
360
pF
N ote:
* Tw o Tone Method; f
1
=
30.00 MH z; f
2
=
30.001 MH z
In Cl ass C: G
P
Mi n. 13.5 dB, Effici ency 65%@ 30MHz
G
P
Mi n. 10 dB, Eff ici ency 57%@ 70MH z
STATIC
Symbol
Test Conditions
Value
Unit
Min.
Typ.
Max.
BV
CES
I
C
=
200mA
V
BE
=
0V
110
--
--
V
BV
CEO
I
C
=
200mA
I
B
=
0mA
55
--
--
V
BV
EBO
I
E
=
20mA
I
C
=
0mA
4.0
--
--
V
I
CEO
V
CE
=
30V
I
E
=
0mA
--
--
10
mA
I
CES
V
CE
=
60V
I
E
=
0mA
--
--
10
mA
h
FE
V
CE
=
6V
I
C
=
10A
15
--
45
--
DYNAMIC
SD1728 (TH430)
2/9
POWER GAIN vs POWER OUTPUT PEP
TYPICAL PERFORMANCE (cont'd)
TEST CIRCUIT SSB - CLASS AB - 30 MHz
C1
: Arco 429
C2
: Arco 4615
C3, C6
: Arco 4213
C4, C5,
C7
: Arco 4611
C8
: Arco 427
C9
: 470
F, 40V
C10, C14 : 100nF, 63V
C11, C13,
C15
: 1nF
C12
: 10nF
C16
: 220
F, 63V
L1
: 5 Turns, Diameter 10mm, 1.3mm Wire, Length 15mm
L2
: 2 Turns, Diameter 12mm, 2mm Wire, Length 8mm
L3
: 1 Turn, Diameter 12mm, 2mm Wire, Length 5mm
L4
: Hair Pin Copper Foil 20 x 5mm
L5
: 1 Turn, Diameter 12mm, 2mm Wire, Length 8mm
L6
: 5 Turns, Diameter 8mm, 1.3mm Wire, Length 18mm
L7
: 3 Turns, Diameter 8mm, 1.3mm Wire, Length 15mm
R
: 0.25
*
* 4 Resistors 1
0.5W in parallel
SD1728 (TH430)
4/9
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