BD745, BD745A, BD745B, BD745C
NPN SILICON POWER TRANSISTORS
P R O D U C T
I N F O R M A T I O N
1
AUGUST 1978 - REVISED SEPTEMBER 2002
Specifications are subject to change without notice.
Designed for Complementary Use with the
BD746 Series
115 W at 25C Case Temperature
20 A Continuous Collector Current
25 A Peak Collector Current
Customer-Specified Selections Available
absolute maximum ratings at 25C case temperature (unless otherwise noted)
NOTES: 1. This value applies for t
p
0.3 ms, duty cycle 10%.
2. Derate linearly to 150C case temperature at the rate of 0.92 W/C.
3. Derate linearly to 150C free air temperature at the rate of 28 mW/C.
4. This rating is based on the capability of the transistor to operate safely in a circuit of: L = 20 mH, I
B(on)
= 0.4 A, R
BE
= 100
,
V
BE(off)
= 0, R
S
= 0.1
, V
CC
= 20 V.
RATING
SYMBOL
VALUE
UNIT
Collector-base voltage (I
E
= 0)
BD745
BD745A
BD745B
BD745C
V
CBO
50
70
90
110
V
Collector-emitter voltage (I
B
= 0)
BD745
BD745A
BD745B
BD745C
V
CEO
45
60
80
100
V
Emitter-base voltage
V
EBO
5
V
Continuous collector current
I
C
20
A
Peak collector current (see Note 1)
I
CM
25
A
Continuous base current
I
B
7
A
Continuous device dissipation at (or below) 25C case temperature (see Note 2)
P
tot
115
W
Continuous device dissipation at (or below) 25C free air temperature (see Note 3)
P
tot
3.5
W
Unclamped inductive load energy (see Note 4)
LI
C
2
90
mJ
Operating free air temperature range
T
A
-65 to +150
C
Operating junction temperature range
T
j
-65 to +150
C
Storage temperature range
T
stg
-65 to +150
C
Lead temperature 3.2 mm from case for 10 seconds
T
L
260
C
SOT-93 PACKAGE
(TOP VIEW)
Pin 2 is in electrical contact with the mounting base.
MDTRAAA
B
C
E
1
2
3
BD745, BD745A, BD745B, BD745C
NPN SILICON POWER TRANSISTORS
2
P R O D U C T
I N F O R M A T I O N
AUGUST 1978 - REVISED SEPTEMBER 2002
Specifications are subject to change without notice.
NOTES: 5. These parameters must be measured using pulse techniques, t
p
= 300 s, duty cycle
2%.
6. These parameters must be measured using voltage-sensing contacts, separate from the current carrying contacts.
Voltage and current values shown are nominal; exact values vary slightly with transistor parameters.
electrical characteristics at 25C case temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
(BR)CEO
Collector-emitter
breakdown voltage
I
C
= 30 mA
I
B
= 0
(see Note 5)
BD745
BD745A
BD745B
BD745C
45
60
80
100
V
I
CBO
Collector cut-off
current
V
CE
= 50 V
V
CE
= 70 V
V
CE
= 90 V
V
CE
= 110 V
V
CE
= 50 V
V
CE
= 70 V
V
CE
= 90 V
V
CE
= 110 V
V
BE
= 0
V
BE
= 0
V
BE
= 0
V
BE
= 0
V
BE
= 0
V
BE
= 0
V
BE
= 0
V
BE
= 0
T
C
= 125C
T
C
= 125C
T
C
= 125C
T
C
= 125C
BD745
BD745A
BD745B
BD745C
BD745
BD745A
BD745B
BD745C
0.1
0.1
0.1
0.1
5
5
5
5
mA
I
CEO
Collector cut-off
current
V
CE
= 30 V
V
CE
= 60 V
I
B
= 0
I
B
= 0
BD745/745A
BD745B/745C
0.1
0.1
mA
I
EBO
Emitter cut-off
current
V
EB
= 5 V
I
C
= 0
0.5
mA
h
FE
Forward current
transfer ratio
V
CE
= 4 V
V
CE
= 4 V
V
CE
= 4 V
I
C
= 1 A
I
C
= 5 A
I
C
= 20 A
(see Notes 5 and 6)
40
20
5
150
V
CE(sat)
Collector-emitter
saturation voltage
I
B
= 0.5 A
I
B
= 5 A
I
C
= 5 A
I
C
= 20 A
(see Notes 5 and 6)
1
3
V
V
BE
Base-emitter
voltage
V
CE
= 4 V
V
CE
= 4 V
I
C
= 5 A
I
C
= 20 A
(see Notes 5 and 6)
1
3
V
h
fe
Small signal forward
current transfer ratio
V
CE
= 10 V
I
C
= 1 A
f = 1 kHz
25
|
h
fe
|
Small signal forward
current transfer ratio
V
CE
= 10 V
I
C
= 1 A
f = 1 MHz
5
thermal characteristics
PARAMETER
MIN
TYP
MAX
UNIT
R
JC
Junction to case thermal resistance
1.1
C/W
R
JA
Junction to free air thermal resistance
35.7
C/W
resistive-load-switching characteristics at 25C case temperature
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
t
d
Delay time
I
C
= 5 A
V
BE(off)
= -4.2 V
I
B(on)
= 0.5 A
R
L
= 6
I
B(off)
= -0.5 A
t
p
= 20 s, dc
2%
20
ns
t
r
Rise time
350
ns
t
s
Storage time
500
ns
t
f
Fall time
400
ns
BD745, BD745A, BD745B, BD745C
NPN SILICON POWER TRANSISTORS
3
P R O D U C T
I N F O R M A T I O N
AUGUST 1978 - REVISED SEPTEMBER 2002
Specifications are subject to change without notice.
TYPICAL CHARACTERISTICS
Figure 1.
Figure 2.
MAXIMUM SAFE OPERATING REGIONS
Figure 3.
TYPICAL DC CURRENT GAIN
vs
COLLECTOR CURRENT
I
C
- Collector Current - A
01
10
10 100
h
FE
-
D
C
C
u
r
r
en
t
G
a
in
10
100
TCS635AE
V
CE
= 4 V
t
p
= 300 s, duty cycle < 2%
T
C
= 125C
T
C
= 25C
T
C
= -55C
COLLECTOR-EMITTER SATURATION VOLTAGE
vs
COLLECTOR CURRENT
I
C
- Collector Current - A
01
10
10
100
V
CE
(
s
a
t
)
- Co
l
l
e
c
to
r-Em
i
tte
r Sa
tu
ra
ti
o
n
V
o
l
t
a
g
e
- V
001
01
10
10
TCS635AF
T
C
= -55C
T
C
= 25C
T
C
= 125C
t
p
= 300s, duty cycle < 2%
I
C
I
B
= 10
MAXIMUM FORWARD-BIAS
SAFE OPERATING AREA
V
CE
- Collector-Emitter Voltage - V
10
10
100
1000
I
C
- Co
l
l
e
c
to
r Cu
rre
n
t - A
001
01
10
10
100
SAS635AC
BD745
BD745A
BD745B
BD745C
t
p
= 1 ms,
d = 0.1 = 10%
t
p
= 10 ms,
d = 0.1 = 10%
t
p
= 50 ms,
d = 0.1 = 10%
DC Operation
BD745, BD745A, BD745B, BD745C
NPN SILICON POWER TRANSISTORS
4
P R O D U C T
I N F O R M A T I O N
AUGUST 1978 - REVISED SEPTEMBER 2002
Specifications are subject to change without notice.
THERMAL INFORMATION
Figure 4.
MAXIMUM POWER DISSIPATION
vs
CASE TEMPERATURE
T
C
- Case Temperature - C
0
25
50
75
100
125
150
P
to
t
-
M
a
x
i
m
u
m
P
o
w
e
r
D
i
ss
i
p
at
i
o
n
-
W
0
20
40
60
80
100
120
TIS635AB
BD745, BD745A, BD745B, BD745C
NPN SILICON POWER TRANSISTORS
5
P R O D U C T
I N F O R M A T I O N
AUGUST 1978 - REVISED SEPTEMBER 2002
Specifications are subject to change without notice.
SOT-93
3-pin plastic flange-mount package
This single-in-line package consists of a circuit mounted on a lead frame and encapsulated within a plastic
compound. The compound will withstand soldering temperature with no deformation, and circuit performance
characteristics will remain stable when operated in high humidity conditions. Leads require no additional
cleaning or processing when used in soldered assembly.
MECHANICAL DATA
SOT-93
ALL LINEAR DIMENSIONS IN MILLIMETERS
4,90
4,70
1,37
1,17
0,78
0,50
2,50 TYP.
15,2
14,7
12,2 MAX.
16,2 MAX.
18,0 TYP.
31,0 TYP.
1,30
1,10
11,1
10,8
4,1
4,0
3,95
4,15
1
2
3
NOTE A: The centre pin is in electrical contact with the mounting tab.
MDXXAW
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