.108 MHz
.28 VOLTS
.EFFICIENCY 75%
.COMMON EMITTER
.GOLD METALLIZATION
.P
OUT
75 W MIN. WITH 10.0 dB GAIN
=
SD1457
RF & MICROWAVE TRANSISTORS
FM BROADCAST APPLICAT IONS
.500 4LF L (M174)
epoxy sealed
ORDER CODE
SD1457
PIN CON NECTION
BRANDING
SD1457
DESC RIPTIO N
The SD1457 is a 28 V gold metallized epitaxial
silicon NPN planar transistor designed for FM VHF
broadcast transmitters.
This device utlizes diffused emitter resistors to
achieve infinite VSWR at rated operating conditions.
ABSOLUTE MAXIMUM RATINGS (T
Symbol Parameter Value Uni t
V
CBO
V
CEO
V
CES
V
EBO
I
C
P
DISS
T
J
T
STG
THERMA L DA TA
R
TH(j-c)
Collector-Base Voltage 65 V
Collector-Emitter Voltage 30 V
Collector-Emitter Voltage 60 V
Emitter-Base Voltage 4.0 V
Device Current 10 A
Power Dissipation 100 W
Junction Temperature +200
Storage Temperature
Junction-Case Thermal Resistance 1.5 °C/W
case
= 25°C)
1. Collector 3. Base
2. Emitter 4. Emitter
65 to +150
−
°
C
°
C
November 1992
1/5
SD1457
ELECTRICAL SPECIF ICATIO NS (T
case
= 25°C)
STATIC
Symbol Test Conditions
BV
CBOIC
BV
CERIC
BV
CEOIC
BV
EBOIE
h
FE
= 50mA IE= 0mA 65 — — V
= 50mA RBE= 10Ω 60 — — V
= 50mA IB= 0mA 30 — — V
= 10mA IC= 0mA 4.0 — — V
VCE= 5V IC= 1A 20 — 150 —
Min. Typ. Max.
Value
DYNAMIC
Symbol Test C ond itions
P
OUT
G
η
cf=108 MHz PIN= 7.5 W VCE= 28 V 70 — — %
C
OB
f = 108 MHz PIN= 7.5 W VCE= 28 V 75 — — W
f = 108 MHz PIN= 7.5 W VCE= 28 V 10 — — dB
P
f = 1 MHz VCB= 30 V — — 85 pF
Value
Min. Typ. Max.
Unit
Unit
TYPICA L PERFO R MA NCE
POWER OUTPUT vs POWER INPUT
THERMAL RESISTANCE vs CASE
TEMPERATURE
2/5
IMPEDA NCE DATA
Z
IN
SD1457
Z
CL
FREQ. ZIN(Ω)ZCL(Ω)
88 MHz 1.4 + j 0.1 5.5 + j 0.7
98 MHz 1.2 + j 0.3 6.1 + j 1.1
100 MHz 1.0 + j 0.5 5.7 + j 1.6
TEST CIRCUIT
C1, C2,
C14 : 24 - 200pF, Arco 425
C3 : 16 - 100pF, Arco 423
C4 : 62pF, Unelco Capacitor
C5, C6 : 330pF, Unelco Capacitor
C7, C10 : 1000pF, Unelco Capacitor
C8, C9 : 36pF, Unelco Capacitor
C11, C12 : 0.1µF, Disc Capacitor
C13 : 100µF, 63V, Electrolytic Capacitor
C15 : 25 - 150pF, Arco 424
L1 : 3 Turns, 1mm Wire, 6mm I.D.
L2 : 1/2 Turn, 1.4mm Wire, 15mm Length
L3 : 0.7µH, Molded Choke
L4 : 1/2 Turn, 2mm Wire, 20mm Length
L5 : 4 Turns, 1mm Wire, 6mm I.D.
L6 : 4 Turns, 1.2mm Wire on Ferrite Core
L7 : 3 Turns,1.4mm Wire, 8mm I.D.
Board
Material: Epoxy Glass
3/5
SD1457
PACKAGE MECHANICAL DATA
Ref.: Dwg. No.12-0174
4/5
SD1457
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 ofpatents or other rights of third partieswhich may results from its use. No
license isgranted byimplication orotherwise under any patentor patentrights ofSGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorizedforuse ascritical componentsin lifesupport devices orsystemswithout express
written approvalof SGS-THOMSON Microelectonics.
1994 SGS-THOMSON Microelectronics- All Rights Reserved
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SGS-THOMSON Microelectronics GROUP OF COMPANIES
5/5
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