MS1281.PDF 5-8-03
Advanced Power Technology reserves the right to change, without notice, the specifications and information contained herein
Visit our website at WWW.ADVANCEDPOWER.COM or contact our factory direct.
MS1281
DESCRIPTION:
DESCRIPTION:
The MS1281 is a 28V silicon NPN planar transistor
designed primarily for VHF FM broadcast transmitters.
Diffused emitter ballast provide infinite VSWR capability
under rated operating conditions.
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS
(Tcase = 25
C)
Symbol
Parameter
Value
Unit
V
CBO
Collector-Base Voltage
60
V
V
CEO
Collector-Emitter Voltage
25
V
V
CES
Collector-Emitter Voltage
60
V
V
EBO
Emitter-Base Voltage
4.0
V
I
C
Device Current
16
A
P
D
Power Dissipation
230
W
Tj
Junction Temperature
200
C
T
STG
Storage Temperature
-65 to +150
C
Thermal Data
Thermal Data
R
TH(J-C)
Thermal Resistance Junction-case
0.75
C/W
Features
Features
108 MHz
28 VOLTS
GOLD METALLIZATION
P
OUT
= 150 WATTS
G
P
= 9.2dB MINIMUM
COMMON EMITTER CONFIGURATION
RF & MICROWAVE TRANSISTORS
FM BROADCAST APPLICATIONS
MS1281.PDF 5-8-03
Advanced Power Technology reserves the right to change, without notice, the specifications and information contained herein
Visit our website at WWW.ADVANCEDPOWER.COM or contact our factory direct.
MS1281
ELECTRICAL SPECIFICATIONS (
ELECTRICAL SPECIFICATIONS (Tcase = 25
Tcase = 25
C)
C)
STATIC
STATIC
Symbol
Test Conditions
Value
Min.
Typ.
Max.
Unit
BV
CBO
I
C
= 100 mA
I
E
= 0 mA
60
---
---
V
BV
CES
I
C
= 100 mA
R
BE
= 10
55
---
---
V
BV
CEO
I
C
= 100 mA
I
B
= 0 mA
25
---
---
V
BV
EBO
I
E
= 20 mA
I
C
= 0 mA
4.0
---
---
V
h
FE
V
CE
= 5 V
I
C
= 1 A
20
---
150
---
DYNAMIC
DYNAMIC
Symbol
Test Conditions
Value
Min.
Typ.
Max.
Unit
P
OUT
f = 108MHz
P
IN
= 18W
V
CE
= 28V
150
---
---
W
G
P
f = 108MHz
P
IN
= 18W
V
CE
= 28V
9.2
---
---
dB
f = 108MHz
P
IN
= 18W
V
CE
= 28V
70
---
---
%
C
OB
f = 1 MHz
V
CB
= 28V
---
---
150
pF
IMPEDANCE DATA
IMPEDANCE DATA
FREQ
Z
IN
(
)
)
Z
CL
(
)
)
88 MHz
1.0 - j0.2
3.6 + j2.4
100 MHz
0.7 + j0.0
3.9 + j3.0
108 MHz
1.0 - j0.5
4.4 + j1.2
P
OUT
= 150 W
V
CC
= 28 V
MS1281.PDF 5-8-03
Advanced Power Technology reserves the right to change, without notice, the specifications and information contained herein
Visit our website at WWW.ADVANCEDPOWER.COM or contact our factory direct.
MS1281
PACKAGE MECHANICAL DATA
PDF 
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