BU931T
Automotive-grade high voltage ignition coil driver
NPN power Darlington transistor
Datasheet - production data
TAB
TO-220
1
2
3
Figure 1: Internal schematic diagram
Features
AEC-Q101 qualified
Very rugged Bipolar technology
High operating junction temperature
Applications
High ruggedness electronic ignitions
Description
This is a high voltage power Darlington transistor developed using multi-epitaxial planar technology. It has been properly designed for automotive environment as electronic ignition power actuators.
Order code
BU931T
Table 1: Device summary
Marking Package
BU931T TO-220
Packing
Tube
October 2017 DocID1004 Rev 5
This is information on a product in full production.
1/12 www.st.com
Contents
Contents
BU931T
1 Electrical ratings ............................................................................. 3
2 Electrical characteristics ................................................................ 4
2.1
Electrical characteristics (curves) ...................................................... 5
3 Test circuits ..................................................................................... 7
4 Package information ....................................................................... 8
4.1
TO-220 type A package information .................................................. 9
5 Revision history ............................................................................ 11
2/12 DocID1004 Rev 5
BU931T
1 Electrical ratings
Symbol
Table 2: Absolute maximum ratings
Parameter
V
CES
V
CEO
V
EBO
I
C
I
CM
I
B
I
BM
P
TOT
T stg
T j
Collector-emitter voltage (V
BE
= 0)
Collector-emitter voltage (I
B
= 0)
Emitter-base voltage (I
C
= 0)
Collector current
Collector peak current
Base current
Base peak current
Total dissipation at Tc = 25 °C
Storage temperature range
Operating junction temperature range
Symbol
R thJC
R thJA
Table 3: Thermal data
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
Electrical ratings
Value
500
400
5
10
20
1
5
125
-65 to 175
Unit
A
A
W
°C
°C
V
V
V
A
A
Value
1.2
62.5
Unit
°C/W
°C/W
DocID1004 Rev 5 3/12
Electrical characteristics
2 Electrical characteristics
(T
C
= 25 °C unless otherwise specified)
Symbol Parameter
Table 4: Electrical characteristics
Test conditions
V
V
I
I
I
CES
CEO
EBO
V
CEO(sus)
(2)
CE(sat)
BE(sat)
h
FE
V
F
(2)
(2)
(2)
Collector cut-off current
Collector cut-off current
V
BE
= 0 V, V
CE
= 500 V
V
BE
= 0 V, V
CE
= 500 V,
T
C
= 125 °C (1)
I
B
= 0 A, V
CE
= 450 V
I
B
= 0 A, V
CE
= 450 V,
T
C
= 125 °C (1)
Emitter cut-off current I
C
= 0 A, V
EB
= 5 V
Collector-emitter sustaining voltage
I
B
= 0 A, I
C
= 100 mA
Collector-emitter saturation voltage
I
C
= 7 A, I
B
= 70 mA
I
C
= 8 A, I
B
= 100 mA
I
C
= 10 A, I
B
= 250 mA
I
C
= 7 A, I
B
= 70 mA
Base-emitter saturation voltage
I
C
= 8 A, I
B
= 100 mA
I
C
= 10 A, I
B
= 250 mA
DC current gain I
C
= 5 A, V
CE
= 10 V
Diode forward voltage I
F
= 10 A
Functional test
V
CC
= 24 V,L = 7 mH,
V clamp
= 400 V
(see Figure 10: "Functional test circuit" )
BU931T
Min. Typ. Max. Unit
100
μA
-
- 0.5 mA
- 100 µA
- 0.5 mA
- 20 mA
400 - V
1.6 - V
- 1.8 V
- 1.8 V
- 2.2 V
- 2.4 V
- 2.5 V
300 -
2.5 V -
8 - A
Notes:
(1)
Defined by design, not subject to production test.
(2) Pulse test: pulse duration ≤ 300 μs, duty cycle ≤ 2 %.
Symbol Parameter t s t f
Storage time
Fall time
V
Table 5: Inductive load switching times
Test conditions Min. Typ. Max. Unit
CC
= 12 V, V
R
BE
= 47 Ω, I
C clamp
= 300 V, L = 7 mH,
= 7 A, I
B
= 70 mA
-
-
15
0.5
-
-
μs
μs
4/12 DocID1004 Rev 5
BU931T
2.1 Electrical characteristics (curves)
Figure 2: Safe operating area
Electrical characteristics
Figure 3: DC current gain
Figure 4: Switching time inductive load Figure 5: Collector-emitter saturation voltage
@ h
FE
= 50
Figure 6: Collector-emitter saturation voltage
@ h
FE
= 100
Figure 7: Collector-emitter saturation voltage
5/12 DocID1004 Rev 5
Electrical characteristics
Figure 8: Base-emitter saturation voltage @ h
FE
= 50
BU931T
Figure 9: Base-emitter saturation voltage
@ h
FE
= 100
6/12 DocID1004 Rev 5
BU931T
3 Test circuits
Figure 10: Functional test circuit
Test circuits
Figure 11: Functional test waveforms
Figure 12: Switching time test circuit Figure 13: Sustaining voltage test circuit
DocID1004 Rev 5 7/12
Package information
4 Package information
BU931T
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK ® packages, depending on their level of environmental compliance. ECOPACK ® specifications, grade definitions and product status are available at: www.st.com
.
ECOPACK ® is an ST trademark.
8/12 DocID1004 Rev 5
BU931T
4.1 TO-220 type A package information
Figure 14: TO-220 type A package outline
Package information
DocID1004 Rev 5 9/12
Package information
Dim. e1
F
H1
J1
L
L1
L20
D
D1
E e
A b b1 c
L30
øP
Q
BU931T
Table 6: TO-220 type A package mechanical data mm
Min. Typ.
4.40
0.61
1.14
0.48
15.25
1.27
10.00
2.40
4.95
1.23
6.20
2.40
13.00
3.50
16.40
28.90
3.75
2.65
10.40
2.70
5.15
1.32
6.60
2.72
14.00
3.93
3.85
2.95
Max.
4.60
0.88
1.55
0.70
15.75
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BU931T
5
Revision history
Revision history
Date Revision
Table 7: Document revision history
Changes
18-Nov-2008
02-Dec-2009
12-Oct-2017
3
4
5
Package changed from TO-218 to TO-247 for BU931P.
Inserted type in TO-220 (BU931T).
Modified I
C
test condition value of V
CEO(sus)
parameter Table 4 on page 4 , updated TO-220 package mechanical data.
The part numbers BU931 and BU931P have been moved to two separate datasheets.
Modified Table 2: "Absolute maximum ratings" , Table 3: "Thermal data"
and Table 4: "Electrical characteristics" .
Updated Section 4: "Package information" .
Minor text changes.
DocID1004 Rev 5 11/12
BU931T
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12/12 DocID1004 Rev 5
