BU941Z/BU941ZP
BU941ZPFI
HIGH VOLTAGE IGNITION COIL DRIVER
NPN POWER DARLINGTON TRANSISTOR
s
VERY RUGGED BIPOLAR TECHNOLOGY
s
BUILT IN CLAMPING ZENER
s
HIGH OPERATING JUNCTION
TEMPERATURE
s
WIDE RANGE OF PACKAGES
s
FULLY INSULATED PACKAGE (U.L.
COMPLIANT) FOR EASY MOUNTING
APPLICATIONS
s
HIGH RUGGEDNESS ELECTRONIC
IGNITIONS
DESCRIPTION
The devices are bipolar Darlington transistors
manufactured using Multiepitaxial Planar
technology.
They have been properly designed to
be used in Automotive environment as electronic
ignition power actuators.
INTERNAL SCHEMATIC DIAGRAM
April 2002
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
BU941Z
BU941ZP
BU941ZPFI
V
CEO
Collector-Emitter Voltage (I
B
= 0)
350
V
V
EBO
Emitter-Base Voltage (I
C
= 0)
5
V
I
C
Collector Current
15
A
I
CM
Collector Peak Current
30
A
I
B
Base Current
1
A
I
BM
Base Peak Current
5
A
P
tot
Total Dissipation at T
c
= 25
o
C
180
155
65
W
V
isol
Insulation Withstand Voltage (RMS) from All
Three Leads to Exernal Heatsink
2500
V
T
stg
Storage Temperature
-65 to 200
-65 to 175
-65 to 175
o
C
T
j
Max. Operating 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
ISOWATT218
R
thj-case
Thermal Resistance Junction-case Max
0.97
0.97
2.3
o
C/W
ELECTRICAL CHARACTERISTICS (T
case
= 25
o
C unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
CEO
Collector Cut-off
Current (I
B
= 0)
V
CE
= 300 V
V
CE
= 300 V T
C
= 125
o
C
100
0.5
A
mA
I
EBO
Emitter Cut-off 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-Emitter
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(sat)
Base-Emitter
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
FE
DC Current Gain
I
C
= 5 A V
CE
= 10 V
300
V
F
Diode Forward Voltage
I
F
= 10 A
2.5
V
Functional Test
V
CC
= 24 V L = 7 mH
(see fig. 1)
10
A
t
s
t
f
INDUCTIVE LOAD
Storage Time
Fall Time
V
CC
= 12 V L = 7 mH
V
BE
= 0 R
BE
= 47
V
clamp
= 300 V I
C
= 7 A
I
B
= 70 mA (see fig. 3)
15
0.5
s
s
Pulsed: Pulse duration = 300
s, duty cycle 1.5 %
Safe Operating Areas
Derating Curves (TO-3)
BU941Z/BU941ZP/BU941ZPFI
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Derating Curves (TO-218/ISOWATT218)
DC Current Gain
Collector-emitter Saturation Voltage
DC Current Gain
Collector-emitter Saturation Voltage
Base-emitter Saturation Voltage
BU941Z/BU941ZP/BU941ZPFI
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Base-emitter Saturation Voltage
Collector-emitter Saturation Voltage
FIGURE 1: Functional Test Circuit
FIGURE 2: Functional Test Waveforms
FIGURE 3: Switching Time Test Circuit
BU941Z/BU941ZP/BU941ZPFI
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