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BU931 BU931P, BU931T
High voltage ignition coil driver NPN power Darlington transistors
Features

Very rugged Bipolar technology High operating junction temperature Wide range of packages
1 2
3 2 1 1 3 2
TAB TAB
Application
High ruggedness electronic ignitions TO-3 TO-247
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.
TO-220
Figure 1.
Internal schematic diagrams
for TO-3
for TO-220 and TO-247
Table 1.
Device summary
Marking BU931 BU931P BU931T Packages TO-3 TO-247 TO-220 Packaging Tray Tube Tube
Order codes BU931 BU931P BU931T
December 2009
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Content
BU931, BU931P, BU931T
Content
1 2 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 4 5
Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
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Electrical ratings
1
Electrical ratings
Table 2.
Symbol VCES VCEO VEBO IC ICM IB IBM PTOT TSTG TJ
Absolute maximum ratings
Value Parameter BU931 Collector-emitter voltage (VBE = 0) Collector-emitter voltage (IB = 0) Emitter-base voltage (IC = 0) Collector current Collector peak current Base current Base peak current Total dissipation at Tc = 25 C Storage temperature Max. operating junction temperature 175 -65 to 200 200 15 30 1 5 135 -65 to 175 C 175 125 BU931P 500 400 5 10 20 BU931T V V V A A A A W Unit
Table 3.
Symbol
Thermal data
Value Parameter BU931 BU931P 1.1 BU931T 1.2 C/W Thermal resistance junction-case max. Unit
RthJC
1
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Electrical characteristics
BU931, BU931P, BU931T
2
Electrical characteristics
Tcase = 25 C; unless otherwise specified. Table 4.
Symbol ICES ICEO IEBO
Electrical characteristics
Parameter Collector cut-off current (VBE = 0) Collector cut-off current (IB = 0) Emitter cut-off current (IC = 0) Test conditions VCE = 500 V VCE = 500 V VCE = 450 V VCE = 450 V VEB = 5 V L = 10 mH 400 IB = 70 mA IB = 100 mA IB = 250 mA IB = 70 mA IB = 100 mA IB = 250 mA VCE = 10 V 300 2.5 8 V A 1.6 1.8 1.8 2.2 2.4 2.5 V V V V V V V Min. Typ. Max. 100 0.5 100 0.5 20 Unit A mA A mA mA
TC = 125 C TC = 125 C
VCEO(sus)(1)
IC = 100 mA Collector-emitter Vclamp = 400 V sustaining voltage (IB = 0) see Figure 14 Collector-emitter saturation voltage IC = 7 A IC = 8 A IC = 10 A IC = 7 A IC = 8 A IC = 10 A IC = 5 A IF = 10 A
VCE(sat) (1)
VBE(sat)
(1)
Base-emitter saturation voltage DC current gain Diode forward voltage Functional test
hFE (1) VF
VCC = 24 V L = 7 mH Vclamp = 400 V see Figure 11 Vclamp = 300 V IC = 7 A L = 7 mH IB = 70 mA RBE = 47 VBE = 0 VCC = 12 V see Figure 13
ts tf
Inductive Load Storage time Fall time
15 0.5
s s
1. Pulse test: pulse duration 300 s, duty cycle 2 %
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Electrical characteristics
2.1
Figure 2.
Electrical characteristics (curves)
Safe operating area for BU931 and BU931P Figure 3. Safe operating area for BU931T
Figure 4.
DC current gain
Figure 5.
Switching time inductive load
Figure 6.
Collector-emitter saturation voltage Figure 7. @ hFE = 50
Collector-emitter saturation voltage @ hFE = 100
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Electrical characteristics Figure 8. Collector-emitter saturation voltage Figure 9.
BU931, BU931P, BU931T Base-emitter saturation voltage @ hFE = 50
Figure 10. Base-emitter saturation voltage @ hFE = 100
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Test circuits
3
Test circuits
Figure 12. Functional test waveforms
Figure 11. Functional test circuit
Figure 13. Switching time test circuit
Figure 14. Sustaining voltage test circuit
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Package mechanical data
BU931, BU931P, BU931T
4
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK(R) is an ST trademark.
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Package mechanical data
TO-3 mechanical data
mm. DIM. min. A B C D E G N P R U V 11.00 0.97 1.50 8.32 19.00 10.70 16.50 25.00 4.00 38.50 30.00 typ max. 13.10 1.15 1.65 8.92 20.00 11.10 17.20 26.00 4.09 39.30 30.30
0015923C
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Package mechanical data
BU931, BU931P, BU931T
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-220 type A mechanical data
mm Dim Min A b b1 c D D1 E e e1 F H1 J1 L L1 L20 L30 P Q 4.40 0.61 1.14 0.48 15.25 1.27 10 2.40 4.95 1.23 6.20 2.40 13 3.50 16.40 28.90 3.75 2.65 3.85 2.95 10.40 2.70 5.15 1.32 6.60 2.72 14 3.93 Typ Max 4.60 0.88 1.70 0.70 15.75
0015988_Rev_S
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Revision history
BU931, BU931P, BU931T
5
Revision history
Table 5.
Date 18-Nov-2008 02-Dec-2009
Document revision history
Revision 3 4 Changes Package changed from TO-218 to TO-247 for BU931P. Inserted type in TO-220 (BU931T). Modified IC test condition value of VCEO(sus) parameter Table 4 on page 4, updated TO-220 package mechanical data.
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