BUF742
TELEFUNKEN Semiconductors
Rev. A2, 18-Jul-97
1 (8)
Silicon NPN High Voltage Switching Transistor
Features
D Simple-sWitch-Off Transistor (SWOT)
D HIGH SPEED technology
D Planar passivation
D 100 kHz switching rate
D Very low switching losses
D Very low dynamic saturation
D Very low operating temperature
D Optimized RBSOA
D High reverse voltage
Applications
Electronic lamp ballast circuits
Switch-mode power supplies
14283
Absolute Maximum Ratings
T
case
= 25
C, unless otherwise specified
Parameter
Test Conditions
Symbol
Value
Unit
Collector-emitter voltage
V
CEO
400
V
g
V
CEW
550
V
V
CES
900
V
Emitter-base voltage
V
EBO
11
V
Collector current
I
C
5
A
Collector peak current
I
CM
7.5
A
Base current
I
B
2.5
A
Base peak current
I
BM
4
A
Total power dissipation
T
case
25
C
P
tot
50
W
Junction temperature
T
j
150
C
Storage temperature range
T
stg
65 to +150
C
Maximum Thermal Resistance
T
case
= 25
C, unless otherwise specified
Parameter
Test Conditions
Symbol
Value
Unit
Junction case
R
thJC
2.5
K/W
BUF742
TELEFUNKEN Semiconductors
Rev. A2, 18-Jul-97
2 (8)
Electrical Characteristics
T
case
= 25
C, unless otherwise specified
Parameter
Test Conditions
Symbol
Min
Typ
Max
Unit
Collector cut-off current
V
CE
= 900 V
I
CES
10
mA
V
CE
= 900 V; T
case
= 150
C
I
CES
200
mA
Collector-emitter breakdown
voltage (figure 1)
I
C
= 500 mA; L = 125 mH;
I
measure
= 100 mA
V
(BR)CEO
400
V
Emitter-base breakdown voltage
I
E
= 1 mA
V
(BR)EBO
11
V
Collector-emitter saturation
I
C
= 0.8 A; I
B
= 0.2 A
V
CEsat
0.2
V
voltage
I
C
= 2.5 A; I
B
= 0.8 A
V
CEsat
0.4
V
Base-emitter saturation voltage
I
C
= 0.8 A; I
B
= 0.2 A
V
BEsat
1
V
g
I
C
= 2.5 A; I
B
= 0.8 A
V
BEsat
1.2
V
DC forward current transfer ratio
V
CE
= 2 V; I
C
= 10 mA
h
FE
15
V
CE
= 2 V; I
C
= 0.8 A
h
FE
15
V
CE
= 2 V; I
C
= 2.5 A
h
FE
7
V
CE
= 2 V; I
C
= 5 A
h
FE
4
Collector-emitter working voltage
V
S
= 50 V; L = 1 mH; I
C
= 2.5 A;
I
B1
= 0.5 A; I
B2
= 0.5 A;
V
BE(off)
= 5 V
V
CEW
500
V
Dynamic saturation voltage
I
C
= 2.5 A; I
B
= 0.5 A; t = 1
ms
V
CEsatdyn
7
12
V
y
g
I
C
= 2.5 A; I
B
= 0.5 A; t = 3
ms
V
CEsatdyn
1.5
3
V
Gain bandwidth product
I
C
= 200 mA; V
CE
= 10 V;
f = 1 MHz
f
T
4
MHz
BUF742
TELEFUNKEN Semiconductors
Rev. A2, 18-Jul-97
3 (8)
Switching Characteristics
T
case
= 25
C, unless otherwise specified
Parameter
Test Conditions
Symbol
Min
Typ
Max
Unit
Resistive load (figure 2)
Turn on time
I
C
= 0.8 A; I
B
= 0.2 A; I
B2
= 0.4 A;
t
on
0.1
0.2
ms
Storage time
C
;
B
;
B2
;
V
S
= 250 V
t
s
1.5
2
ms
Fall time
t
f
0.2
0.3
ms
Turn on time
I
C
= 2.5 A; I
B1
= 0.5 A; I
B2
= 1.3 A;
t
on
0.3
0.4
ms
Storage time
C
;
B1
;
B2
;
V
S
= 250 V
t
s
1
1.3
ms
Fall time
t
f
0.1
0.15
ms
Inductive load (figure 3)
Storage time
I
C
= 0.8 A; I
B
= 0.2 A; I
B2
= 0.4 A;
t
s
1.5
2
ms
Fall time
C
;
B
;
B2
;
V
clamp
= 300 V; L = 200
mH
t
f
0.15
0.2
ms
Storage time
I
C
= 2.5 A; I
B1
= 0.5 A; I
B2
= 1.3 A;
t
s
1
1.3
ms
Fall time
C
;
B1
;
B2
;
V
clamp
= 300 V; L = 200
mH
t
f
0.05
0.1
ms
+
3 Pulses
94 8863
t
p
T +
0.1
t
p
+ 10 ms
V
S2
+ 10 V
I
B
w
I
C
5
I
C
L
C
V
S1
+
V
(BR)CEO
I
(BR)R
100 m
W
I
C
V
CE
V
(BR)CEO
I
measure
0 to 30 V
Figure 1. Test circuit for V
(BR)CE0
BUF742
TELEFUNKEN Semiconductors
Rev. A2, 18-Jul-97
4 (8)
0
t
I
C
V
CE
R
C
V
CC
I
B
V
BB
R
B
I
B1
94 8852
+
(1)
(1) Fast electronic switch
I
B
I
B1
I
B2
I
C
0.9 I
C
0.1 I
C
t
t
s
t
off
t
f
t
r
t
d
t
on
Figure 2. Test circuit for switching characteristics resistive load
0
0.9 I
C
0.1 I
C
t
I
C
V
CE
V
CC
I
B
V
BB
R
B
I
B1
V
clamp
+
L
C
94 8853
(1)
(1) Fast electronic switch
(2) Fast recovery rectifier
(2)
I
B
I
B1
I
B2
I
C
t
t
r
t
s
Figure 3. Test circuit for switching characteristics inductive load
BUF742
TELEFUNKEN Semiconductors
Rev. A2, 18-Jul-97
5 (8)
Typical Characteristics (T
case
= 25
_C unless otherwise specified)
0
1
2
3
4
5
6
0
100
200
300
400
500
600
V
CE
Collector Emitter Voltage ( V )
13706
I Collector Current (
A
)
C
0.1 x I
C
< I
B2
< 0.5 x I
C
V
CEsat
< 2 V
Figure 4. V
CEW
Diagram
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
1
2
3
4
5
6
7
8
9
10 11
V
CE
Collector Emitter Voltage ( V )
13708
I Collector Current (
A
)
C
0.6A
I
B
=0.1A
0.2A
0.4A
0.3A
0.5A
Figure 5. I
C
vs. V
CE
1
10
100
0.01
0.10
1.00
10.00
I
C
Collector Current ( A )
13710
h Forward DC Current
T
ransfer
Ratio
FE
5V
V
CE
=2V
10V
Figure 6. h
FE
vs. I
C
0.01
0.10
1.00
10.00
100.00
0
25
50
75
100
125
150
T
case
Case Temperature (
C )
13707
P
T
otal Power Dissipation (
W
)
tot
12.5K/W
25K/W
50K/W
R
thJA
=85K/W
2.5K/W
Figure 7. P
tot
vs.T
case
0.01
0.10
1.00
10.00
0.01
0.10
1.00
10.00
I
B
Base Current ( A )
13709
V
Collector Emitter Saturation
V
oltage (
V
)
CEsat
I
C
=0.5A
2A
3A
5A
1A
Figure 8. V
CEsat
vs. I
B
1
10
100
0.01
0.10
1.00
10.00
I
C
Collector Current ( A )
13711
h Forward DC Current
T
ransfer
Ratio
FE
V
CE
=2V
T
j
= 125
C
75
C
25
C
Figure 9. h
FE
vs. I
C
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