STMICROELECTRONICS SM6T68AY/CAY

SM6TY
Automotive 600 W Transil™
Features
■
peak pulse power:
– 600 W (10/1000 µs)
– 4 kW (8/20 µs)
A
■
stand-off voltage range: from 6.4 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 Tj max:
– 515 W (10/1000 µs)
■
JEDEC registered package outline
■
resin meets UL 94, V0
■
ECOPACK®2 compliant components
■
AEC-Q101 qualified
K
Bidirectional
SMB
(JEDEC DO-214AA)
Unidirectional
Description
Complies with the following standards
The SM6TY Transil series has been designed to
protect sensitive automotive circuits against
surges defined in ISO 7637-2 and against
electrostatic discharges according to
IEC 61000-4-2 and ISO 10605.
The planar technology makes this device
compatible with high-end circuits where low
leakage current and high junction temperature are
required to provide reliability and stability over
time. SM6TY are packaged in SMB (SMB
footprint in accordance with IPC 7531 standard).
■
IEC 61000-4-2 level 4:
– 15 kV (air discharge)
– 8 kV (contact discharge)
■
ISO 10605, 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 17741 Rev 1
1/11
www.st.com
11
Characteristics
SM6TY
1
Characteristics
Table 1.
Absolute maximum ratings (Tamb = 25 °C)
Symbol
VPP
PPP
Tj
Tstg
TL
Parameter
Peak pulse voltage
Value
ISO 10605 (C = 330 pF, R = 330 Ω)
Contact discharge
Air discharge
IEC 61000-4-2
Contact discharge
Air discharge
Peak pulse power dissipation(1)
Unit
30
30
kV
30
30
Tj initial = Tamb
600
W
Operating junction temperature range
-55 to 150
Storage temperature range
-65 to 150
Maximum lead temperature for soldering during 10 s.
°C
260
1. For a surge greater than the maximum values, the diode will fail in short-circuit.
Table 2.
Thermal resistance
Symbol
Parameter
Value
Unit
Rth(j-l)
Junction to leads
20
°C/W
Rth(j-a)
Junction to ambient on printed circuit on recommended pad layout
100
°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
V
IRM
IR
IPP
IPP
Repetitive pulse current
tr = rise time (µs)
tp = pulse duration time (µs)
2/11
IR
IRM
IRM
IR
Pulse definition for electrical characteristics
tr
VCLVBR VRM
tp
Doc ID 17741 Rev 1
VRMVBR VCL
Bidirectional
SM6TY
Characteristics
Table 3.
Electrical characteristics, typical values unless otherwise stated (Tamb = 25 °C)
IRM max@VRM
Order code
25 °C 85 °C
VBR @IR (1)
min. typ.
µA
V
V
VCL @IPP
10/1000 µs
RD (2)
10/1000 µs
max.
VCL @IPP RD (2)
8/20 µs 8/20 µs
max.
mA
V(3)
A(4)
Ω
V(3)
αT
max.
A(4)
Ω
10-4/ °C
SM6T7V5AY
20
50
6.4
7.13
7.5
10
11.3
53
0.065
14.5 276
0.024
6.1
SM6T18AY/CAY
0.2
1
15.3 17.1
18
1
25.2
24
0.263
32.5 123
0.111
8.8
SM6T22AY/CAY
0.2
1
18.8 20.9
22
1
30.6
20
0.375
39.3 102
0.159
9.2
SM6T24AY/CAY
0.2
1
20.5 22.8
24
1
33.2
18
0.444
42.8
93
0.189
9.4
SM6T27AY/CAY
0.2
1
23.1 25.7
27
1
37.5
16
0.569
48.3
83
0.240
9.6
SM6T30AY/CAY
0.2
1
25.6 28.5
30
1
41.5
14.5
0.690
53.5
75
0.293
9.7
SM6T33AY/CAY
0.2
1
28.2 31.4
33
1
45.7
13.1
0.840
59.0
68
0.357
9.8
SM6T36AY/CAY
0.2
1
30.8 34.2
36
1
49.9
12
1.01
64.3
62
0.427
9.9
SM6T39AY/CAY
0.2
1
33.3 37.1
39
1
53.9
11.1
1.16
69.7
57
0.504
10.0
SM6T42CAY
0.2
1
36
42.1
1
58.1
10.3
1.35
76
52
0.611
10.0
SM6T47AY/CAY
0.2
1
40
44.4 46.7
1
64.5
9.7
1.59
84
48
0.728
10.1
SM6T68AY/CAY
0.2
1
1
92
6.5
3.17
121
33
1.503
10.4
40
58.1 64.6
68
1. Pulse test : tp < 50 ms
2. To calculate maximum clamping voltage at another 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.
Figure 3.
Peak power dissipation versus
initial junction temperature
(typical values)
Figure 4.
Ppp (W)
Peak pulse power versus
exponential pulse duration
PPP(kW)
700
100.0
10/1000 µs
Tj initial = 25 °C
600
500
10.0
400
300
1.0
200
100
Tj(°C)
tP(ms)
0.1
0
0
25
50
75
100
125
150
175
1.0E-03
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1.0E-02
1.0E-01
1.0E+00
1.0E+01
3/11
Characteristics
Figure 5.
100.0
SM6TY
Clamping voltage versus peak pulse current exponential waveform (maximum values)
IPP(A)
Tj initial = 25 °C
8/20 µs
10.0
10/1000 µs
10 ms
SM6T68A
SM6T30A
1.0
VCL(V)
0.1
10
Figure 6.
10
100
1000
ISO 7637-2 pulse 1 response (VS = -100 V)
Voltage (V)
0
-10
-20
-30
-40
SM6T36AY
-50
SM6T36CAY
Current (A)
0
-2
-4
-6
-8
-10
-12
Time (ms)
0.0
4/11
1.0
2.0
Doc ID 17741 Rev 1
3.0
4.0
SM6TY
Characteristics
Figure 7.
ISO 7637-2 pulse 2a response (VS = 50 V)
Voltage (V)
50
40
30
20
10
0
12
SM6T36AY
Current (A)
SM6T36CAY
10
Note: Curves superimposed
8
6
4
2
0
Time (µs)
0
Figure 8.
20
30
40
50
60
70
80
90
100
ISO 7637-2 pulse 3a response (VS = -150 V)
20 Voltage (V)
10
0
-10
-20
-30
-40
SM6T36AY
-50
SM6T36CAY
0.5
Current (A)
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
Time (µs)
0
0.2
0.4
0.6
0.8
1.0
Doc ID 17741 Rev 1
1.2
1.4
1.6
5/11
Characteristics
Figure 9.
60
SM6TY
ISO 7637-2 pulse 3b response (VS = 100 V)
Voltage (V)
50
40
30
20
10
0
Current (A)
SM6T36AY
3.0
SM6T36CAY
2.5
Note: Curves superimposed
2.0
1.5
1.0
0.5
0
Time (µs)
0
Note:
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
ISO7637-2 pulses responses are not applicable for products with a stand off voltage lower
than the average battery voltage (13.5 V).
Figure 10. Junction capacitance versus reverse Figure 11. Junction capacitance versus
applied voltage for unidirectional
reverse applied voltage for
types (typical values)
bidirectional types (typical values)
1000
C(pF)
1000
C(pF)
F = 1 Mhz
Vosc = 30 mVRMS
Tj = 25 °C
SM6T30CAY
F=1 MHz
Vosc =30 mVRMS
Tj=25 °C
SM6T30AY
100
SM6T68AY
VR(V)
VR(V)
10
1
6/11
SM6T68CAY
100
10
100
10
1
Doc ID 17741 Rev 1
10
100
SM6TY
Characteristics
Figure 12. Relative variation of thermal
impedance, junction to ambient,
versus pulse duration
1.00
Figure 13. Thermal resistance junction to
ambient versus copper surface
under each lead
Rth(j-a) (°C/W)
Zth (j-a)/Rth (j-a)
110
Recommended pad layout
Printed circuit board FR4, copper thickness = 35 µm
100
Printed circuit board FR4,
copper thickness = 35 µm
90
80
70
60
0.10
50
40
30
20
tp ms
10
0.01
SCu(cm²)
0
1.0E-03
1.0E-02
1.0E-01
1.0E+00
1.0E+01
1.0E+02
1.0E+03
Figure 14. Leakage current versus junction
temperature (typical values)
IR (nA)
0.0
0.5
VR=VRM
VRM < 10 V
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Figure 15. Peak forward voltage drop versus
peak forward current
(typical values)
1.0E+02
1.E+03
1.0
1.E+02
1.0E+01
1.E+01
1.0E+00
IFM(A)
Tj =125 °C
Tj =25 °C
VR=VRM
VRM ≥ 10 V
1.E+00
1.0E-01
Tj (° C)
VFM(V)
1.E-01
1.0E-02
25
50
75
100
125
150
0.0
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0.5
1.0
1.5
2.0
2.5
3.0
7/11
Application and design guidelines
2
SM6TY
Application and design guidelines
More information is available in the ST Application note AN2689 “Protection of automotive
electronics from electrical hazards, guidelines for design and component selection”.
3
Ordering information scheme
Figure 16. Ordering information scheme
SM
Surface mount
Peak pulse power
6 = 600 W Transil in SMB
Breakdown voltage
30 = 30 V
Types
CA = Bidirectional
A = Unidirectional
Automotive grade
8/11
Doc ID 17741 Rev 1
6 T XX
CA Y
SM6TY
4
Packaging information
Packaging information
●
Case: JEDEC DO-214AA 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 meets 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.
SMB dimensions
Dimensions
E1
Ref.
D
Millimeters
Inches
Min.
Max.
Min.
Max.
A1
1.90
2.45
0.075
0.096
A2
0.05
0.20
0.002
0.008
b
1.95
2.20
0.077
0.087
c
0.15
0.40
0.006
0.016
D
3.30
3.95
0.130
0.156
E
5.10
5.60
0.201
0.220
E1
4.05
4.60
0.159
0.181
L
0.75
1.50
0.030
0.059
E
A1
A2
C
L
b
Figure 17. SMB footprint dimensions in
mm (inches)
1.62
2.60
(0.064) (0.102)
Figure 18. Marking layout(1)
1.62
(0.064)
Cathode bar (unidirectional devices only )
2.18
(0.086)
5.84
(0.300)
x x x
z y ww
ECOPACK compliance
XXX: Marking
Z: Manufacturing location
Y: Year
WW: Week
1. Marking layout can vary according to assembly location.
Doc ID 17741 Rev 1
9/11
Ordering information
Table 5.
5
SM6TY
Marking
Order code
Marking
SM6T7V5AY
DGY
SM6T18AY
EEY
Order code
Marking
SM6T18CAY
MEY
SM6T22AY
EKY
SM6T22CAY
MKY
SM6T24AY
EMY
SM6T24CAY
MMY
SM6T27AY
EPY
SM6T27CAY
MPY
SM6T30AY
ERY
SM6T30CAY
MRY
SM6T33AY
ETY
SM6T33CAY
MTY
SM6T36AY
EVY
SM6T36CAY
MVY
SM6T39AY
EXY
SM6T39CAY
MXY
SM6T42CAY
NAY
SM6T47AY
FAY
SM6T47CAY
NBY
SM6T68AY
FQY
SM6T68CAY
NQY
Ordering information
Table 6.
Ordering information
Order code
Marking
SM6TxxxAy/CAy(1) See Table 5 on page 10
Package
Weight
SMB
0.11 g
Base qty Delivery mode
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.
10/11
Document revision history
Date
Revision
15-Sep-2010
1
Changes
Initial release.
Doc ID 17741 Rev 1
SM6TY
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11/11