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 T
j max
: 150 °C
high power capability at T
jmax
:
– 1250 W (10/1000 µs)
JEDEC registered package outline
resin meets UL 94, V0
AEC qualified
K
A
■
■
■
Unidirectional
Bidirectional
SMC
(JEDEC DO-214AB)
■
■
■
■
■
Description
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 61000-
4-2 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).
Complies with the following standards
■
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 (V
RM
) lower than
the average battery voltage: 13.5 V):
– Pulse 1: V
S
= -100 V
– Pulse 2a: V
S
= +50 V
– Pulse 3a: V
S
= -150 V
– Pulse 3b: V
S
= +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
Table 1.
Symbol
Characteristics
Absolute maximum ratings (T
amb
= 25
°C
)
Parameter
ISO10605 (C = 330 pF, R = 330
Ω)
contact discharge
air discharge
IEC61000-4-2
contact discharge
air discharge
T
j initial
= T
amb
Value
Unit
V
PP
Peak pulse voltage
30
30
30
30
1500
-65 to + 150
-40 to + 150
260
kV
P
PP
T
stg
T
j
T
L
Peak pulse power dissipation
(1)
Storage temperature range
Operating junction temperature range
Maximum lead temperature for soldering during 10 s.
W
°C
°C
°C
1. For a surge greater than the maximum values, the diode will fail in short-circuit.
Table 2.
Symbol
R
th(j-l)
R
th(j-a)
Thermal parameter
Parameter
Junction to leads
Junction to ambient on printed circuit on recommended pad layout
Value
15
90
Unit
°C/W
°C/W
Figure 1.
Electrical characteristics - definitions
I
I
I
PP
Symbol
V
RM
V
BR
V
CL
I
RM
I
PP
α
T
V
F
R
D
Parameter
Stand-off voltage
Breakdown voltage
Clamping voltage
Leakage current @ V
RM
Peak pulse current
Voltage temperature coefficient
Forward voltage drop
Dynamic resistance
Unidirectional
I
F
V
CL
V
BR
V
RM
I
RM
I
R
V
F
V
V
CL
V
BR
V
RM
I
R
I
RM
I
RM
I
R
V
V
RM
V
BR
V
CL
I
PP
I
PP
Bidirectional
Figure 2.
Pulse definition for electrical characteristics
%I
PP
100
50
Pulse waveform
tr = rise time (µs)
tp = pulse duration time (µs)
0
tr
tp
t
2/12
Doc ID 17865 Rev 1
SM15TY
Table 3.
Characteristics
Electrical characteristics, typical values unless otherwise stated (T
amb
= 25 °C)
I
RM
max@V
RM
V
BR
@I
R (1)
V
CL
@I
PP
10/1000 µs
max.
mA
18
22
24
27
30
33
36
39
47
68
1
1
1
1
1
1
1
1
1
1
R
D
10/1000
µs
V
CL
@I
PP
8/20 µs
max.
R
D
8/20
µs
αT
(2)
Order code
25 °C 85 °C
µA
V
1
1
1
1
1
1
1
1
1
1
15.3
18.8
20.5
23.1
25.6
28.2
30.8
33.3
40.2
58.1
min. typ.
V
17.1
20.9
22.8
25.7
28.5
31.4
34.2
37.1
44.7
64.6
max.
A
(4)
308
254
234
207
187
169
156
143
119
83
V
(3)
25.2
30.6
33.2
37.5
41.5
45.7
49.9
53.9
64.5
92
A
(4)
59.5
49
45
40
36
33
30
28
23.2
16.3
Ω
0.106
0.153
0.178
0.228
0.278
0.333
0.403
0.461
0.653
1.26
V
(3)
32.5
39.3
42.8
48.3
53.5
59
64.3
69.7
84
121
Ω
0.044
0.064
0.075
0.096
0.12
0.14
0.17
0.2
0.291
0.6
10-4/
°C
8.8
9.2
9.4
9.6
9.7
9.8
9.9
10
10.1
10.4
SM15T18AY/CAY
SM15T22AY/CAY
SM15T24AY/CAY
SM15T27AY/CAY
SM15T30AY/CAY
SM15T33AY/CAY
SM15T36AY/CAY
SM15T39AY/CAY
SM15T47AY/CAY
SM15T68AY/CAY
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
1. Pulse test: t
p
< 50 ms
2. To calculate maximum clamping voltage at other surge level, use the following formula: V
CL
max = V
CL
- R
D
x (I
PP
- I
PPappli
)
where IPP
appli
is the surge current in the application
3. To calculate V
BR
or V
CL
versus junction temperature, use the following formulas:
V
BR
@ T
J
= V
BR
@ 25 °C x (1 +
αT
x (T
J
- 25))
V
CL
@ T
J
= V
CL
@ 25 °C x (1 +
αT
x (T
J
- 25))
4. Surge capability given for both directions for unidirectional and bidirectional types.
Doc ID 17865 Rev 1
3/12
Characteristics
SM15TY
Figure 3.
Peak pulse power dissipation
versus initial junction temperature
(typical values)
10/1000 µs
Figure 4.
Peak pulse power versus
exponential pulse duration
(T
j
initial = 25 °C)
2000
P
PP
(W)
100.0
P
PP
(kW)
1500
10.0
1000
1.0
500
0
0
25
50
75
100
125
150
T
j
(°C)
175
0.1
1.0E-03
tp (ms)
1.0E-02
1.0E-01
1.0E+00
1.0E+01
Figure 5.
Clamping voltage versus peak
pulse current (exponential
waveform, maximum values)
Figure 6.
Junction capacitance versus
reverse applied voltage for
unidirectional types (typical values)
1000.0
I
PP
(A)
T j initial=25 °C
SM15T22AY/CAY
SM15T30AY/CAY
8/20 µs
10/1000 µs
10 ms
10.00
C(nF)
F=1 MHz
V
osc
=30 mV
RMS
T
j
=25 °C
100.0
10.0
1.00
SM15T30AY
1.0
SM15T68AY/CAY
0.1
10
100
V
CL
(V)
1000
0.10
1
10
SM15T68AY
V
R
(V)
100
Figure 7.
Junction capacitance versus
reverse applied voltage for
bidirectional types (typical values)
Figure 8.
Thermal resistance junction to
ambient versus copper surface
under each lead
C(nF)
10.0
F=1 MHz
V
osc
=30 mV
RMS
T
j
=25 °C
100
90
80
70
SM15T30CAY
R
th(j-a)
(°C/W)
Printed circuit board FR4,
copper thickness = 35 µm
60
50
40
30
1.0
SM15T68CAY
20
V
R
(V)
0.1
1
10
100
10
0
0.0
S
Cu
(cm²)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
4/12
Doc ID 17865 Rev 1
SM15TY
Characteristics
Figure 9.
Leakage current versus junction
temperature (typical values)
Figure 10. Peak forward voltage drop versus
peak forward current
(typical values)
100.0
1.0E+04
I
R
(nA)
I
FM
(A)
1.0E+03
10.0
1.0E+02
T
j
= 125 °C
T
j
= 25 °C
1.0
1.0E+01
1.0E+00
25
T
j
(°C)
50
75
100
125
150
0.1
0.0
V
FM
(V)
0.5
1.0
1.5
2.0
2.5
Figure 11. ISO7637-2 pulse 1 response (V
S
= -100 V)
Voltage (V)
10
0
-10
-20
-30
-40
Voltage
SM15T39AY
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
5/12
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