Page 1
DISCRETE SEMICONDUCTORS
DATA SH EET
BFQ255; BFQ255A
PNP video transistors
Product specification
Supersedes data November 1995
File under Discrete Semiconductors, SC05
1997 Oct 02
Page 2
Philips Semiconductors Product specification
PNP video transistors BFQ255; BFQ255A
FEATURES
• High breakdown voltages
• Low output capacitance
• High gain bandwidth
DESCRIPTION
PNP video transistor in a SOT128B
(TO-202) plastic package.
NPN complements: BFQ235 and
BFQ235A.
age
• Good thermal stability
• Gold metallization ensures
excellent reliability.
PINNING
PIN DESCRIPTION
APPLICATIONS
• Buffer/driver in high-resolution
colour graphics monitors.
1 emitter
2 collector
3 base
123
MGA323
Fig.1 Simplified outline
(SOT128B; TO-202).
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
CBO
collector-base voltage open emitter
BFQ255 −−−100 V
BFQ255A −−−115 V
V
CER
collector-emitter voltage RBE= 100 Ω
BFQ255 −−−95 V
BFQ255A −−−110 V
I
C
P
tot
h
FE
f
T
collector current (DC) −−−300 mA
total power dissipation Ts≤ 100 °C; note 1 −−3W
DC current gain IC= −50 mA; VCE= −10 V; T
=25°C20 30 −
amb
transition frequency IC= −50 mA; VCE= −10 V; f = 100 MHz;
T
=25°C
BFQ255 1 1.3 − GHz
amb
BFQ255A 0.8 1.2 − GHz
Note
is the temperature at the soldering point of the collector pin.
1. T
s
1997 Oct 02 2
Page 3
Philips Semiconductors Product specification
PNP video transistors BFQ255; BFQ255A
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
CBO
V
CEO
V
CER
V
EBO
I
C
P
tot
T
stg
T
j
collector-base voltage open emitter
BFQ255 −−100 V
BFQ255A −−115 V
collector-emitter voltage open base
BFQ255 −−65 V
BFQ255A −−95 V
collector-emitter voltage RBE= 100 Ω
BFQ255 −−95 V
BFQ255A −−110 V
emitter-base voltage open collector −−3V
collector current (DC) −−300 mA
total power dissipation Ts≤ 100 °C; note 1; see Fig.3 − 3W
storage temperature −65 +150 °C
junction temperature − 175 °C
Note
is the temperature at the soldering point of the collector pin.
1. T
s
THERMAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS VALUE UNIT
R
th j-s
thermal resistance from junction to soldering point Ts≤ 100 °C; note 1 25 K/W
Note
is the temperature at the soldering point of the collector pin.
1. T
s
1997 Oct 02 3
Page 4
Philips Semiconductors Product specification
PNP video transistors BFQ255; BFQ255A
CHARACTERISTICS
T
=25°C unless otherwise specified.
j
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
(BR)CBO
V
(BR)CEO
V
(BR)CER
V
(BR)EBO
I
CES
I
CBO
h
FE
C
cb
f
T
collector-base breakdown voltage IC= −0.1 mA; IE=0
BFQ255 −100 −−V
BFQ255A −115 −−V
collector-emitter breakdown voltage IC= −10 mA; IB=0
BFQ255 −66 −−V
BFQ255A −95 −−V
collector-emitter breakdown voltage IC= −10 mA; RBE= 100 Ω
BFQ255 −95 −−V
BFQ255A −110 −−V
emitter-base breakdown voltage IE= −0.1 mA; IC=0 −3 −−V
collector-emitter cut-off current IB= 0; VCE= −50 V −−−100 µA
collector-base cut-off current IE= 0; VCB= −50 V −−−20 µA
DC current gain IC= −50 mA; VCE= −10 V;
T
=25°C; see Fig.4
amb
collector-base capacitance IC= 0; VCB= −10 V; f = 1 MHz;
20 30 −
− 2 − pF
see Fig.5
transition frequency IC= −50 mA; VCE= −10 V;
BFQ255 1 1.3 − GHz
f = 100 MHz; T
=25°C; see Fig.6
amb
BFQ255A 0.8 1.2 − GHz
−60
V
CEO
MEA333
(V)
−500
handbook, halfpage
I
C
(mA)
−400
−300
−200
−100
0
0 −20 −40 −80
Fig.2 DC SOAR.
1997 Oct 02 4
handbook, halfpage
4
P
tot
(W)
3
2
1
0
0 50 100 200
MBB888
150
Ts (oC)
Fig.3 Power derating curve.
Page 5
Philips Semiconductors Product specification
PNP video transistors BFQ255; BFQ255A
50
handbook, halfpage
h
FE
40
30
20
10
0
VCE= −10V; T
Fig.4 DC current gain as a function of
−100 −200
=25°C.
amb
IC (mA)
collector current; typical values.
MEA332
−300
handbook, halfpage
6
C
cb
(pF)
5
4
3
2
1
0 −10 −20 −40
f =1 MHz; T
amb
=25°C.
MEA331
−30
VCB (V)
Fig.5 Collector-base capacitance as a function of
collector-base voltage; typical values.
2.0
handbook, halfpage
f
T
(GHz)
1.5
1.0
0.5
0 −50 −100 −150
VCE= −10V; f = 100MHz; T
amb
BFQ255
BFQ255A
=25°C.
MEA330
IC (mA)
Fig.6 Transition frequency as a function of
collector current; typical values.
1997 Oct 02 5
Page 6
Philips Semiconductors Product specification
PNP video transistors BFQ255; BFQ255A
PACKAGE OUTLINE
Plastic single-ended leaded (through hole) package; with cooling fin, mountable to heatsink,
1 mounting hole; 3 leads (in-line)
E
1
P
P
1
H
E
c
1
SOT128B
L
2
DIMENSIONS (mm are the original dimensions)
UNIT b
Note
1. Plastic flash allowed within this zone
A
p
4.6
0.8
0.65
mm
4.4
0.6
OUTLINE
VERSION
SOT128B TO-202
0.56
0.5
0.46
IEC JEDEC EIAJ
DE
1
8.6
8.4
123
b
p
e
1
e
E
0 5 10 mm
E
1
10.1
10.4
9.9
10.0
REFERENCES
L
1
w M
scale
e
eH
1
2.54
5.08
Q
Lcc
E
13.3
24.2
12.2
23.8
c
A
L
1
2.4
2.0
D
L
(1)
L
2
max
2.5
EUROPEAN
PROJECTION
PQw
P
1
3.8
3.9
1.7
3.6
3.7
ISSUE DATE
1.5
97-02-28
0.25
1997 Oct 02 6
Page 7
Philips Semiconductors Product specification
PNP video transistors BFQ255; BFQ255A
DEFINITIONS
Data sheet status
Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1997 Oct 02 7
Page 8
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Printed in The Netherlands 127027/00/02/pp8 Date of release: 1997 Oct 02 Document order number: 9397 750 02889
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