BU941Z/BU941ZP
BU941ZPFI
HIGH VOLTAGE IGNITION COIL DRIVER
NPN POWER DARLINGTON
s
VERY RUGGED BIPOLAR TECHNOLOGY
s
BUILT IN CLAMPING ZENER
s
HIGH OPERATING JUNCTION
TEMPERATURE
s
WIDE RANGE OF PACKAGES
APPLICATIONS
s
HIGH RUGGEDNESS ELECTRONIC
IGNITIONS
INTERNAL SCHEMATIC DIAGRAM
January 2000
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Uni t
BU941Z
BU941Z P
BUB941ZPFI
V
CEO
Collect or-Emitter Voltage (I
B
= 0)
350
V
V
EBO
Emitter-Base Voltage (I
C
= 0)
5
V
I
C
Collect or Current
15
A
I
CM
Collect or Peak Current
30
A
I
B
Base Current
1
A
I
BM
Base Peak Current
5
A
P
t ot
Tot al Dissipation at T
c
= 25
o
C
180
155
65
W
T
stg
Storage T emperat ure
-65 to 200
-65 to 175
-65 to 175
o
C
T
j
Max. O perating Junction Temperature
200
175
175
o
C
for TO-3
Emitter: pin 2
Base: pin1
Collector: tab
1
2
3
TO-218
ISOWATT218
1
2
3
1
2
TO-3
1/8
THERMAL DATA
TO-3
TO-218
ISOW AT T218
R
t hj-ca se
Thermal Resistance Junct ion-case Max
0.97
0.97
2.3
o
C/W
ELECTRICAL CHARACTERISTICS (T
case
= 25
o
C unless otherwise specified)
Symb ol
Parameter
Test Cond ition s
Mi n.
Typ .
Max.
Un it
I
CEO
Collector Cut -of f
Current (I
B
= 0)
V
CE
= 300 V
V
CE
= 300 V
T
j
= 125
o
C
100
0.5
A
mA
I
EBO
Emitt er Cut -of f Current
(I
C
= 0)
V
EB
= 5 V
20
mA
V
CL
Clamping Voltage
I
C
= 100 mA
350
500
V
V
CE(sat )
Collector-Emit ter
Saturation Voltage
I
C
= 8 A
I
B
= 100 mA
I
C
= 10 A
I
B
= 250 mA
I
C
= 12 A
I
B
= 300 mA
1.8
1.8
2
V
V
V
V
BE(s at)
Base-Emitt er
Saturation Voltage
I
C
= 8 A
I
B
= 100 mA
I
C
= 10 A
I
B
= 250 mA
I
C
= 12 A
I
B
= 300 mA
2.2
2.5
2.7
V
V
V
h
F E
DC Current Gain
I
C
= 5 A
V
CE
= 10 V
300
V
F
Diode F orward Voltage
I
F
= 10 A
2.5
V
Funct ional T est
(see fig. 1)
V
CC
= 24 V
L= 7 mH
10
A
t
s
t
f
INDUCTIVE LO AD
St orage Time
Fall Time
(see fig. 3)
V
CC
= 12 V
L= 7 mH
V
BE
= 0
R
BE
= 47
V
c la mp
= 300 V
I
C
= 7 A
I
B
= 70 mA
15
0.5
s
s
Pulsed: Pulse duration = 300
s, duty cycle 1.5 %
Safe Operating Area
DC Current Gain
BU941Z/BU941ZP/BU941ZPFI
2/8
DC Current Gain
Collector-emitter Saturation Voltage
Base-emitter Saturation Voltage
Collector-emitter Saturation Voltage
Base-emitter Saturation Voltage
Collector-emitter Saturation Voltage
BU941Z/BU941ZP/BU941ZPFI
3/8
FIGURE 1: Functional Test Circuit
FIGURE 2: Functional Test Waveforms
FIGURE 3: Switching Time Test Circuit
BU941Z/BU941ZP/BU941ZPFI
4/8
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
11.00
13.10
0.433
0.516
B
0.97
1.15
0.038
0.045
C
1.50
1.65
0.059
0.065
D
8.32
8.92
0.327
0.351
E
19.00
20.00
0.748
0.787
G
10.70
11.10
0.421
0.437
N
16.50
17.20
0.649
0.677
P
25.00
26.00
0.984
1.023
R
4.00
4.09
0.157
0.161
U
38.50
39.30
1.515
1.547
V
30.00
30.30
1.187
1.193
E
B
R
C
D
A
P
G
N
V
U
O
P003F
TO-3 MECHANICAL DATA
BU941Z/BU941ZP/BU941ZPFI
5/8
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