BU941Z/BU941ZP
BU941ZPFI
HIGH VOLTAGE IGNITION COIL DRIVER
NPN POWER DARLINGTON
■VERYRUGGED BIPOLARTECHNOLOGY
■BUILTIN CLAMPINGZENER
■HIGH OPERATINGJUNCTION
TEMPERATURE
■WIDE RANGE OF PACKAGES
APPLICATIONS
■HIGH RUGGEDNESS ELECTRONIC
IGNITIONS
INTERNAL SCHEMATIC DIAGRAM
January 2000
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
BU941Z BU941ZP BUB941ZPFI
VCEO Collector-Emitter Voltage (IB= 0) 350 V
VEBO Emitter-Base Voltage (IC=0) 5 V
I
CCollector Current 15 A
ICM Collector Peak Current 30 A
IBBase Current 1 A
IBM Base Peak Current 5 A
Ptot Total Dissipation at Tc=25o
C 180 155 65 W
Tstg Storage Temperature -65 to 200 -65 to 175 -65 to 175 oC
TjMax. Operating Junction Temperature 200 175 175 oC
for TO-3
Emitter: pin 2
Base: pin1
Collector: tab
123
TO-218 ISOWATT218 123
12
TO-3
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THERMAL DATA
TO-3 TO-218 ISOWATT218
Rthj-case Thermal Resistance Junction-case Max 0.97 0.97 2.3 oC/W
ELECTRICAL CHARACTERISTICS (Tcase =25oC unlessotherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
ICEO Collector Cut-off
Current (IB=0) V
CE =300V
V
CE =300V T
j=125o
C100
0.5 µA
mA
IEBO Emitter Cut-off Current
(IC=0) V
EB =5V 20 mA
V
CL∗Clamping Voltage IC= 100 mA 350 500 V
VCE(sat)∗Collector-Emitter
Saturation Voltage IC=8A I
B=100mA
I
C=10A I
B=250mA
I
C=12A I
B=300mA
1.8
1.8
2
V
V
V
VBE(sat)∗Base-Emitter
Saturation Voltage IC=8A I
B=100mA
I
C=10A I
B=250mA
I
C=12A I
B=300mA
2.2
2.5
2.7
V
V
V
hFE∗DC Current Gain IC=5A V
CE = 10 V 300
VFDiode Forward Voltage IF=10A 2.5 V
Functional Test
(see fig. 1) VCC =24V L=7mH 10 A
t
s
t
f
INDUCTIVE LOAD
Storage Time
Fall Time
(see fig. 3)
VCC =12V L=7mH
V
BE =0 R
BE =47Ω
V
clamp =300V I
C=7A
I
B=70mA
15
0.5 µs
µs
∗
Pulsed: Pulse duration = 300 µs, duty cycle 1.5 %
Safe Operating Area DC Current Gain
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DCCurrent Gain
Collector-emitter Saturation Voltage
Base-emitterSaturationVoltage
Collector-emitter SaturationVoltage
Base-emitterSaturation Voltage
Collector-emitter SaturationVoltage
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FIGURE 1: FunctionalTest Circuit FIGURE 2: FunctionalTest Waveforms
FIGURE 3: SwitchingTime Test Circuit
BU941Z/BU941ZP/BU941ZPFI
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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
DA
P
G
N
V
U
O
P003F
TO-3 MECHANICAL DATA
BU941Z/BU941ZP/BU941ZPFI
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DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.7 4.9 0.185 0.193
C 1.17 1.37 0.046 0.054
D 2.5 0.098
E 0.5 0.78 0.019 0.030
F 1.1 1.3 0.043 0.051
G 10.8 11.1 0.425 0.437
H 14.7 15.2 0.578 0.598
L2 – 16.2 – 0.637
L3 18 0.708
L5 3.95 4.15 0.155 0.163
L6 31 1.220
R – 12.2 – 0.480
Ø 4 4.1 0.157 0.161
R
A
C
D
E
H
F
G
L6
¯
L3
L2
L5
123
TO-218 (SOT-93) MECHANICAL DATA
P025A
BU941Z/BU941ZP/BU941ZPFI
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DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 5.35 5.65 0.211 0.222
C 3.30 3.80 0.130 0.150
D 2.90 3.10 0.114 0.122
D1 1.88 2.08 0.074 0.082
E 0.75 0.95 0.030 0.037
F 1.05 1.25 0.041 0.049
F2 1.50 1.70 0.059 0.067
F3 1.90 2.10 0.075 0.083
G 10.80 11.20 0.425 0.441
H 15.80 16.20 0.622 0.638
L 9 0.354
L1 20.80 21.20 0.819 0.835
L2 19.10 19.90 0.752 0.783
L3 22.80 23.60 0.898 0.929
L4 40.50 42.50 1.594 1.673
L5 4.85 5.25 0.191 0.207
L6 20.25 20.75 0.797 0.817
N 2.1 2.3 0.083 0.091
R 4.6 0.181
DIA 3.5 3.7 0.138 0.146
P025C/A
ISOWATT218MECHANICAL DATA
- Weight: 4.9g (typ.)
- Maximum Torque (applied to mounting flange) Recommended: 0.8 Nm; Maximum:1 Nm
- The side of thedissipator must beflat within 80 µm
BU941Z/BU941ZP/BU941ZPFI
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are not authorized for useas critical components in life support devices or systems without express written approval of STMicroelectronics.
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