STMICROELECTRONICS SM15T18AY/CAY

SM15TY
Automotive 1500 W Transil™
Features
■
peak pulse power:
– 1500 W (10/1000 µs)
– 10 kW (8/20 µs)
■
stand-off voltage range: from 15 V to 58 V
■
unidirectional and bidirectional types
■
low leakage current:
– 0.2 µA at 25 °C
– 1 µA at 85 °C
■
operating Tj max: 150 °C
■
high power capability at Tjmax:
– 1250 W (10/1000 µs)
■
JEDEC registered package outline
■
resin meets UL 94, V0
■
AEC qualified
A
K
Unidirectional
Bidirectional
SMC
(JEDEC DO-214AB)
Description
Complies with the following standards
The SM15TY Transil series has been designed to
protect sensitive automotive circuits against
surges defined in ISO7637-2 and against
electrostatic discharges according to IEC 610004-2 and ISO10605.
The Planar technology makes it compatible with
high-end circuits where low leakage current and
high junction temperature are required to provide
reliability and stability over time. SM15TY are
packaged in SMC (SMC footprint in accordance
with IPC 7531 standard).
■
IEC 61000-4-2 level 4:
– 15 kV (air discharge)
– 8 kV (contact discharge)
■
ISO10605 - C = 330 pF, R = 330 Ω:
– 15 kV (air discharge)
– 8 kV (contact discharge)
■
ISO 7637-2 (for pulse 1 and 2a, applicable only
to parts with stand-off voltage (VRM) lower than
the average battery voltage: 13.5 V):
– Pulse 1: VS = -100 V
– Pulse 2a: VS = +50 V
– Pulse 3a: VS = -150 V
– Pulse 3b: VS = +100 V
TM: Transil is a trademark of STMicroelectronics
September 2010
Doc ID 17865 Rev 1
1/12
www.st.com
12
Characteristics
SM15TY
1
Characteristics
Table 1.
Absolute maximum ratings (Tamb = 25 °C)
Symbol
VPP
Parameter
Value
ISO10605 (C = 330 pF, R = 330 Ω)
contact discharge
air discharge
IEC61000-4-2
contact discharge
air discharge
Peak pulse voltage
PPP
Peak pulse power dissipation(1)
Tstg
Unit
30
30
kV
30
30
Tj initial = Tamb
1500
W
Storage temperature range
-65 to + 150
°C
Tj
Operating junction temperature range
-40 to + 150
°C
TL
Maximum lead temperature for soldering during 10 s.
260
°C
Value
Unit
1. For a surge greater than the maximum values, the diode will fail in short-circuit.
Table 2.
Thermal parameter
Symbol
Parameter
Rth(j-l)
Junction to leads
15
°C/W
Rth(j-a)
Junction to ambient on printed circuit on recommended pad layout
90
°C/W
Figure 1.
Electrical characteristics - definitions
Symbol
VRM
VBR
VCL
IRM
IPP
αT
VF
RD
Figure 2.
Parameter
Stand-off voltage
Breakdown voltage
Clamping voltage
Leakage current @ VRM
Peak pulse current
Voltage temperature coefficient
Forward voltage drop
Dynamic resistance
Unidirectional
I
I
IF
IPP
VF
VCL VBR VRM
V
VCLVBR VRM
IRM
IR
IPP
IPP
%IPP
100
0
Pulse waveform
tr = rise time (µs)
tp = pulse duration time (µs)
2/12
tr
V
IRM
IR
Pulse definition for electrical characteristics
50
IR
IRM
tp
Doc ID 17865 Rev 1
t
VRMVBR VCL
Bidirectional
SM15TY
Table 3.
Characteristics
Electrical characteristics, typical values unless otherwise stated (Tamb = 25 °C)
IRM [email protected]
Order code
25 °C 85 °C
µA
VBR @IR (1)
min. typ.
V
V
VCL @IPP
10/1000 µs
RD
10/1000
µs
max.
VCL @IPP
8/20 µs
RD
8/20
µs
max.
αT (2)
max.
mA
V(3)
A(4)
Ω
V(3)
A(4)
Ω
10-4/
°C
SM15T18AY/CAY
0.2
1
15.3
17.1
18
1
25.2
59.5
0.106
32.5
308
0.044
8.8
SM15T22AY/CAY
0.2
1
18.8
20.9
22
1
30.6
49
0.153
39.3
254
0.064
9.2
SM15T24AY/CAY
0.2
1
20.5
22.8
24
1
33.2
45
0.178
42.8
234
0.075
9.4
SM15T27AY/CAY
0.2
1
23.1
25.7
27
1
37.5
40
0.228
48.3
207
0.096
9.6
SM15T30AY/CAY
0.2
1
25.6
28.5
30
1
41.5
36
0.278
53.5
187
0.12
9.7
SM15T33AY/CAY
0.2
1
28.2
31.4
33
1
45.7
33
0.333
59
169
0.14
9.8
SM15T36AY/CAY
0.2
1
30.8
34.2
36
1
49.9
30
0.403
64.3
156
0.17
9.9
SM15T39AY/CAY
0.2
1
33.3
37.1
39
1
53.9
28
0.461
69.7
143
0.2
10
SM15T47AY/CAY
0.2
1
40.2
44.7
47
1
64.5
23.2
0.653
84
119
0.291
10.1
SM15T68AY/CAY
0.2
1
58.1
64.6
68
1
92
16.3
1.26
121
83
0.6
10.4
1. Pulse test: tp < 50 ms
2. To calculate maximum clamping voltage at other surge level, use the following formula: VCLmax = VCL - RD x (IPP - IPPappli)
where IPPappli is the surge current in the application
3. To calculate VBR or VCL versus junction temperature, use the following formulas:
VBR @ TJ = VBR @ 25 °C x (1 + αT x (TJ - 25))
VCL @ TJ = VCL @ 25 °C x (1 + αT x (TJ - 25))
4. Surge capability given for both directions for unidirectional and bidirectional types.
Doc ID 17865 Rev 1
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Characteristics
Figure 3.
SM15TY
Peak pulse power dissipation
versus initial junction temperature
(typical values)
PPP(W)
2000
Figure 4.
Peak pulse power versus
exponential pulse duration
(Tj initial = 25 °C)
PPP(kW)
100.0
10/1000 µs
1500
10.0
1000
1.0
500
Tj(°C)
0
0
25
Figure 5.
1000.0
50
75
100
125
150
175
Clamping voltage versus peak
pulse current (exponential
waveform, maximum values)
0.1
1.0E-03
Figure 6.
IPP(A)
10.00
tp (ms)
1.0E-02
1.0E-01
1.0E+00
Junction capacitance versus
reverse applied voltage for
unidirectional types (typical values)
C(nF)
T j initial=25 °C
SM15T22AY/CAY
10.0
F=1 MHz
Vosc =30 mVRMS
Tj=25 °C
SM15T30AY/CAY
100.0
1.0E+01
8/20 µs
10/1000 µs
1.00
SM15T30AY
10 ms
1.0
SM15T68AY/CAY
0.1
10
Figure 7.
100
SM15T68AY
VCL(V)
1000
Junction capacitance versus
reverse applied voltage for
bidirectional types (typical values)
1
100
F=1 MHz
Vosc =30 mVRMS
Tj=25 °C
10
Figure 8.
C(nF)
10.0
VR(V)
0.10
100
Thermal resistance junction to
ambient versus copper surface
under each lead
Rth(j-a)(°C/W)
Printed circuit board FR4,
copper thickness = 35 µm
90
80
70
60
SM15T30CAY
50
1.0
40
30
SM15T68CAY
20
10
VR(V)
0.1
1
4/12
10
100
0
0.0
SCu(cm²)
0.5
Doc ID 17865 Rev 1
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
SM15TY
Figure 9.
1.0E+04
Characteristics
Leakage current versus junction
temperature (typical values)
Figure 10. Peak forward voltage drop versus
peak forward current
(typical values)
IR(nA)
100.0
IFM(A)
1.0E+03
10.0
1.0E+02
Tj = 125 °C
Tj = 25 °C
1.0
1.0E+01
1.0E+00
25
Tj(°C)
50
75
100
125
VFM(V)
0.1
0.0
150
0.5
1.0
1.5
2.0
2.5
Figure 11. ISO7637-2 pulse 1 response (VS = -100 V)
Voltage (V)
Voltage
10
0
-10
-20
-30
SM15T39AY
-40
SM15T39CAY
-50
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
Time (ms)
5
Current (A)
Current
0
SM15T39AY
-5
SM15T39CAY
-10
-15
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
Time (ms)
Doc ID 17865 Rev 1
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Characteristics
SM15TY
Figure 12. ISO7637-2 pulse 2 response (VS = 50 V)
Voltage (V)
50
Voltage
40
SM15T39AY
30
SM15T39CAY
20
10
0
-20
0
40
20
60
80
100
Time (µs)
12
Current (A)
Current
8
SM15T39AY
4
SM15T39CAY
0
-4
-20
0
40
20
60
80
100
Time (µs)
Figure 13. ISO7637-2 pulse 3a response (VS = -150 V)
Voltage (V)
Voltage
20
0.0
SM15T39AY
-20
SM15T39CAY
-40
-60
-0.5
0.0
1.0
0.5
1.5
2.0
Time (µs)
1
Current (A)
Current
0.0
SM15T39AY
SM15T39CAY
-1
-2
-0.2
0.8
1.8
0.0
Time (µs)
6/12
Doc ID 17865 Rev 1
0.0
0.0
SM15TY
Characteristics
Figure 14. ISO7637-2 pulse 3b response (VS = 100 V)
50
Voltage (V)
Voltage
40
SM15T39AY
30
SM15T39CAY
20
10
0
-0.2
0.8
1.8
Time (µs)
1.2
Current (A)
Current
0.8
SM15T39AY
0.4
SM15T39CAY
0
-0.4
-0.2
0.8
1.8
Time (µs)
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Application and design guidelines
2
SM15TY
Application and design guidelines
More information is available in the Application note AN2689 “Protection of automotive
electronics from electrical hazards, guidelines for design and component selection”.
3
Ordering information scheme
Figure 15. Ordering information scheme
SM
Surface mount
Surge rating
15 = 1500 W Transil in SMC
Bre a k down v olta ge
Types
CA = Bidirectional
A = Unidirectional
Automotive grade
8/12
Doc ID 17865 Rev 1
15T
XX
CA
Y
SM15TY
4
Package information
Package information
●
Case: JEDEC DO-214AB molded plastic over planar junction
●
Terminals: solder plated, solderable as per MIL-STD-750, Method 2026
●
Polarity: for unidirectional types the band indicates cathode
●
Flammability: epoxy is rated UL 94, V0
●
RoHS package
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.
Table 4.
SMC dimensions
Dimensions
Ref.
E1
D
Max.
Min.
Max.
A1
1.90
2.45
0.075
0.096
A2
0.05
0.20
0.002
0.008
b
2.90
3.20
0.114
0.126
c
0.15
0.40
0.006
0.016
D
5.55
6.25
0.218
0.246
E
7.75
8.15
0.305
0.321
E1
6.60
7.15
0.260
0.281
E2
4.40
4.70
0.173
0.185
L
0.75
1.50
0.030
0.059
A1
A2
E2
L
b
Inches
Min.
E
C
Millimeters
Figure 16. SMC footprint dimensions in Figure 17. Marking layout(1)
mm (inches)
1.54
(0.061)
5.11
(0.201)
1.54
(0.061)
Cathode bar (unidirectional devices only )
3.14
(0.124)
x x x
z y ww
ECOPACK compliance
XXX: Marking
Z: Manufacturing location
Y: Year
WW: week
8.19
(0.322)
1. Marking layout can vary according to assembly location.
Doc ID 17865 Rev 1
9/12
Package information
Table 5.
SM15TY
Marking
Order code
10/12
Marking
Order code
Marking
SM15T18AY
MEEY
SM15T18CAY
BEEY
SM15T22AY
MEKY
SM15T22CAY
BEKY
SM15T24AY
MEMY
SM15T24CAY
BEMY
SM15T27AY
MEPY
SM15T27CAY
BEPY
SM15T30AY
MERY
SM15T30CAY
BERY
SM15T33AY
METY
SM15T33CAY
BETY
SM15T36AY
MEVY
SM15T36CAY
BEVY
SM15T39AY
MEXY
SM15T39CAY
BEXY
SM15T47AY
MFAY
SM15T47CAY
BFAY
SM15T68AY
MFPY
SM15T68CAY
BFPY
Doc ID 17865 Rev 1
SM15TY
5
Ordering information
Ordering information
Table 6.
Ordering information
Order code
Marking
Package
Weight
Base qty
Delivery mode
SM15TxxxAY/CAY(1)
See Table 5 on page 10
SMC
0.25 g
2500
Tape and reel
1. Where xxx is nominal value of VBR and A or CA indicates unidirectional or bidirectional version. See
Table 3 for list of available devices and their order codes
6
Revision history
Table 7.
Document revision history
Date
Revision
15-Sep-2010
1
Description of changes
Initial release.
Doc ID 17865 Rev 1
11/12
SM15TY
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