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BU941/BU941P
BU941PFI
HIGH VOLTAGE IGNITION COIL DRIVER
NPN POWER DARLINGTON
s SGS-THOMSON PREFERRED SALESTYPE
s NPN DARLINGTON
s INTEGRATED ANTIPARALLEL
COLLECTOR-EMITTER DIODE
s VERY RUGGED BIPOLAR TECHNOLOGY TO-3
s HIGH OPERATING JUNCTION
TEMPERATURE
1
s WIDE RANGE OF PACKAGES 2

APPLICATIONS
s HIGH RUGGEDNESS ELECTRONIC
IGNITIONS
3 3
2 2
TO-218 1 ISOWATT218 1

INTERNAL SCHEMATIC DIAGRAM

for TO-3
Emitter: pin 2
Base: pin1
Collector: tab

ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Uni t
BU941 BU941P BUB941PFI
V CES Collector-Emitter Voltage (V BE = 0) 500 V
V CEO Collector-Emitter Voltage (I B = 0) 400 V
V EBO Emitter-Base Voltage (I C = 0) 5 V
IC Collector Current 15 A
I CM Collector Peak Current 30 A
IB Base Current 1 A
I BM Base Peak Current 5 A
P t ot Total Dissipation at T c = 25 oC 180 155 65 W
o
T stg Storage Temperature -65 to 200 -65 to 175 -65 to 175 C
o
Tj Max. O perating Junction Temperature 200 175 175 C

September 1997 1/8
BU941/BU941P/BUB941PFI

THERMAL DATA
TO-3 TO-218 ISOW ATT 218
o
R t hj-ca se Thermal Resistance Junction-case Max 0.97 0.97 2.3 C/W

ELECTRICAL CHARACTERISTICS (Tcase = 25 oC unless otherwise specified)
Symb ol Parameter Test Cond ition s Min. Typ . Max. Un it
I CES Collector Cut-off V CE = 500 V 100