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BU941ZP BU941ZPFI
High voltage ignition coil driver NPN power Darlington transistors
Features

Very rugged bipolar technology Built in clamping Zener High operating junction temperature Fully insulated package (U.L. compliant) for easy mounting
3 2 1
Applications
High ruggedness electronic ignitions
TO-247 Figure 1.
TO-3PF
Description
The devices are bipolar Darlington transistors manufactured using Multi-Epitaxial Planar technology. They have been properly designed to be used in Automotive environment as electronic ignition power actuators.
Internal schematic diagram
Table 1.
Device summary
Marking BU941ZP BU941ZPFI Packages TO-247 TO-3PF Packaging Tube Tube
Order code BU941ZP BU941ZPFI
January 2008
Rev 7
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Absolute maximum ratings
BU941ZP BU941ZPFI
1
Absolute maximum ratings
Table 2.
Symbol VCEO VEBO IC ICM IB IBM Ptot Visol Tstg TJ
Absolute maximum ratings
Value Parameter BU941ZP Collector-emitter voltage (IB = 0) Emitter-base voltage (IC = 0) Collector current Collector peak current (tp < 5ms) Base current Base peak current (tp < 5ms) Total dissipation at Tc 25 C Insulation withstand voltage (RMS) from all three leads to external heatsink Storage temperature Max. operating junction temperature -65 to 175 175 155 BU941ZPFI 350 5 15 30 1 5 65 2500 -65 to 175 175 V V A A A A W V C C Unit
Table 3.
Symbol Rthj-case
Thermal data
Parameter Thermal resistance junction-case __max TO-247 0.97 TO-3PF 2.3 Unit C/W
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BU941ZP BU941ZPFI
Electrical characteristics
2
Electrical characteristics
(Tcase = 25C; unless otherwise specified) Table 4.
Symbol ICEO
Electrical characteristics
Parameter Collector cut-off current (IB = 0) Emitter cut-off current (IC = 0) Clamping voltage Collector-emitter saturation voltage Test conditions VCE = 300 V VCE = 300 V VEB = 5 V IC = 100 mA IC = 8 A IC = 10 A IC = 12 A IC = 8 A IC = 10 A IC = 12 A IB = 100 mA IB = 250 mA IB = 300 mA IB = 100 mA IB = 250 mA IB = 300 mA VCE = 10 V L = 7 mH L = 7 mH R BE = 47 15 0.5 2.5 s s V 300 10 A 350 Tj = 125 C Min. Typ. Max. 100 0.5 20 500 1.8 1.8 2 2.2 2.5 2.7 Unit A mA mA V V V V V V V
IEBO VClamp(1)
(1)
VCE(sat)
VBE(sat)
(1)
Collector-emitter base voltage DC current gain Functional test
hFE(1)
IC = 5 A VCC = 24 V Figure 13. VCC = 12 V VBE(off) = 0 V IB1 = 70 mA IF = 10 A
ts tf VF
Inductive load Storage time Fall time Diode forward voltage
VClamp = 300 V IC = 7 A
1. Pulsed duration = 300 s, duty cycle 1.5%.
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Electrical characteristics
BU941ZP BU941ZPFI
2.1
Electrical characteristic (curves)
Figure 2. Safe operating area Figure 3. Derating curve
Figure 4.
DC current gain
Figure 5.
DC current gain
Figure 6.
Collector-emitter saturation voltage
Figure 7.
Base-emitter saturation voltage
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BU941ZP BU941ZPFI Figure 8. Base-emitter saturation voltage Figure 9.
Electrical characteristics Base-emitter saturation voltage
Figure 10. Collector-emitter saturation voltage
2.2
Test circuit
Figure 11. Functional test circuit
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Electrical characteristics Figure 12. Functional test waveforms
BU941ZP BU941ZPFI
Figure 13. Switching time test circuit
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Package mechanical data
3
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com
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Package mechanical data
BU941ZP BU941ZPFI
TO-247 Mechanical data
mm. Min. 4.85 2.20 1.0 2.0 3.0 0.40 19.85 15.45 5.45 14.20 3.70 18.50 3.55 4.50 5.50 3.65 5.50 14.80 4.30 Typ Max. 5.15 2.60 1.40 2.40 3.40 0.80 20.15 15.75
Dim. A A1 b b1 b2 c D E e L L1 L2 oP oR S
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Package mechanical data
TO-3PF mechanical data
DIM. A C D D1 E F F2 G G1 H L L2 L3 L4 L5 L6 L7 N R Dia mm. typ
min. 5.30 2.80 3.10 1.80 0.80 0.65 1.80 10.30 15.30 9.80 22.80 26.30 43.20 4.30 24.30 14.60 1.80 3.80 3.40
max. 5.70 3.20 3.50 2.20 1.10 0.95 2.20 11.50 15.70 10.20 23.20 26.70 44.40 4.70 24.70 15 2.20 4.20 3.80
5.45 10
7627132_C
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Revision history
BU941ZP BU941ZPFI
4
Table 5.
Revision history
Document revision history
Revision 6 7 Package change from TO-218 to TO-247 and from ISOWATT218 to TO-3PF. Changes
Date 03-Feb-2005 22-Jan-2008
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BU941ZP BU941ZPFI
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