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Datasheet: V18MLN41206 (Littelfuse)

Multiline Transient Voltage Surge Suppressor

 

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Littelfuse
3
SURF
A
CE MOUNT
V
ARIST
ORS
Surface Mount Varistors
151
w w w . l i t t e l f u s e . c o m
Multiline Transient Voltage Surge Suppressor
MLN SurgeArray
TM
Suppressor
The MLN SurgeArray
TM
Suppressor is designed to help protect compo-
nents from transient voltages that exist at the circuit board level. This
device provides four independent suppressors in a single "1206" leadless
chip in order to reduce part count and placement time as well as save
space on printed circuit boards.
SurgeArray
TM
devices are intended to suppress ESD, EFT and other
transients in order to protect integrated circuits or other sensitive
components operating at any voltage up to 18VDC. SurgeArray devices
are rated to the IEC 61000-4-2 human body model ESD to help products
attain EMC compliance. The array offers excellent isolation and low
crosstalk between sections.
The inherent capacitance of the SurgeArray Suppressor permits it to
function as a filter/suppressor, thereby replacing separate zener/
capacitor combinations.
The MLN array is manufactured using the Littelfuse Multilayer technology
process and is similar to the Littelfuse ML and MLE Series of discrete
leadless chips.
The MLN can also be provided in a Dual version. Contact Littelfuse
for information.
Features
Four Individual Devices in One 1206 Chip
ESD Rated to IEC 61000-4-2 (Level 4)
AC Characterized for Impedance and Capacitance
Low Adjacent Channel Crosstalk, -55dB at 10MHz (Typ)
Low Leakage (6nA at 5.5V, 30nA at 15V)
Operating Voltage up to 18VM(DC)
-55
o
C to 125
o
C Operating Temperature Range
Low-Profile, PCMCIA Compatible
Applications
Data, Diagnostic I/O Ports
Analog Signal/Sensor Lines
Portable/Hand-Held Products
Mobile Communications/Cellular Phones
Computer/DSP Products
Industrial Instruments Including Medical
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Multiline Transient Voltage Surge Suppressor
MLN SurgeArray
TM
Suppressor
Surface Mount Varistors
152
w w w . l i t t e l f u s e . c o m
Absolute Maximum Ratings
For ratings of individual members of a series, see device ratings and specifications table.
Continuous:
Steady State Applied Voltage: DC Voltage Range (VM(DC)). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
V
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125
O
C
Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 150
O
C
Device Ratings and Specifications Any Single Section
Temperature Derating
For applications exceeding 125
o
C ambient temperature, the peak surge
current and energy ratings must be reduced as shown in Figure 1.
MLN ARRAY
UNITS
PART
NUMBER
MAX RATINGS (125
o
C)
PERFORMANCE SPECIFICATIONS (25
o
C)
MAXIMUM
CONTINUOUS
WORKING
VOLTAGE
MAXIMUM
NON-
REPETITIVE
SURGE
CURRENT
(8/20
s)
MAXIMUM
CLAMPING
VOLTAGE
(AT NOTED
CURRENT
8/20
s)
MAXIMUM
NON-
REPETITIVE
SURGE
ENERGY
(10/1000
s)
TYPICAL
ESD SUPPRESSION
VOLTAGE (NOTE 1)
NOMINAL
VOLTAGE AT
1mA DC
CURRENT
CAPACITANCE
AT
1MHz (1V p-p)
V
M(DC)
I
TM
V
C
W
TM
(V)
(A)
(V)
(J)
(V)
(V)
(pF)
V5.5MLN41206
V9MLN41206
V14MLN41206
V18MLN41206
V18MLN41206L
430
520
250
300
140
175
100
125
NOTES:
1. Tested to IEC61000-4-2 Human Body Model (HBM) discharge test circuit. See explanation of Terms on page 7.
2. Direct discharge to device terminals (IEC preffered test method). See figure 2.
3. Corona discharge through air (represents actual ESD event)
4. Capacitance may be customized, contact Sales.
(See Fig. 3)
Peak
(NOTE 2)
8kV CONTACT
(NOTE 3)
15kV AIR
Clamp
(V)
Peak
(V)
(V)
V
N(DC)
MIN
V
N(DC)
MAX
(NOTE 4)
C
TYP
MAX
(pF)
45
75
5.5
9
14
18
18
30
30
30
30
20
7.1
11.0
15.9
22.0
25.0
9.3
16.0
20.3
28.0
35.0
60
95
110
165
200
35
50
55
60
95
45
75
85
100
130
0.1
0.1
0.1
0.1
0.05
15.5 at 2A
23 at 2A
30 at 2A
40 at 2A
50 at 1A
100
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100
110 120
130 140 150
PERCENT OF RA
TED
V
ALUE
AMBIENT TEMPERATURE ( oC)
FIGURE 1. PEAK CURRENT AND ENERGY DERATING CURVE
t
t1
t2
100
90
50
10
O1
TIME
PERCENT OF PEAK
V
ALUE
O1 = VIRTUAL ORIGIN OF WAVE
t1 = VIRTUAL FRONT TIME = 1.25 x t
(IMPULSE DURATION)
t = TIME FROM 10% TO 90% OF PEAK
t2 = VIRTUAL TIME TO HALF VALUE
EXAMPLE:
FOR AN 8/20
s CURRENT
WAVEFORM:
8
s = t1 = VIRTUAL FRONT
20
s = t2 = VIRTUAL TIME TO
HALF VALUE
TIME
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM FOR CLAMPING VOLTAGE
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Typical Performance Curves
Any Single Section
40
30
20
10
0
1
10
100
1000
NUMBER OF DISCHARGES
V
NOM
10,000
FIGURE 4. PRODUCT DISTRIBUTION OF CAPACITANCE (1MHz)
70
60
50
40
30
20
10
0
SAMPLES
CAPACITANCE (pF)
70
60
50
40
30
35
45
55
65
Typical Performance Curves
Any Single Section
FIGURE 5. V-I CHARACTERISTICS
FIGURE 6. PULSE RATING FOR LONG DURATION SURGES (ANY SINGLE SECTION)
90
80
70
60
50
40
30
20
10
0
V
ARIST
OR V
O
L
T
A
GE
(V)
1.0E
-07
CURRENT (A)
1.0E
-06
1.0E
-05
1.0E
-04
1.0E
-03
1.0E
-02
1.0E
-01
1.0E
+00
1.0E
+01
1.0E
+02
MAXIMUM STANDBY CURRENT (LEAKAGE)
MAXIMUM CLAMP VOLTAGE
TYPICAL
1
2
10
100
10
3
10
4
10
5
10
6
100
10
1
0.1
10
100
1000
10000
SQUARE WAVE PULSE DURATION (
s)
SURGE CURRENT (A)
NUMBER OF SURGES
MLN SurgeArray
TM
Suppressor
Surface Mount Varistors
Multiline Transient Voltage Surge Suppressor
153
w w w . l i t t e l f u s e . c o m
3
SURF
A
CE MOUNT
V
ARIST
ORS
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Multiline Transient Voltage Surge Suppressor
MLN SurgeArray
TM
Suppressor
Surface Mount Varistors
154
w w w . l i t t e l f u s e . c o m
Typical Performance Curves
Any Single Section (Continued)
FIGURE 7. STANDBY CURRENT AT NORMALIZED VARISTOR VOLTAGE AND TEMPERATURE (ANY SINGLE SECTION)
FIGURE 8. CAPACITANCE vs FREQUENCY
FIGURE 9. EQUIVALENT SERIES RESISTANCE
100
10
0.1
A
1
A
1
0
A
100
A
1mA
CURRENT (A)
NORMALIZED V
A
RIST
OR
V
O
L
T
A
GE
(%)
-40
o
C
25
o
C
85
o
C
125
o
C
70
65
60
55
50
45
40
1GHz
100MHz
10MHz
1MHz
FREQUENCY
CAP
A
C
IT
ANCE (pF)
1000
1MHz
FREQUENCY
OHMS
100
10
1
0.1
10MHz
100MHz
1GHz
10GHz
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Soldering Recommendations
The principal techniques used for the soldering of components in surface
mount technology are Infrared (IR) Reflow, Vapour Phase Reflow, and
Wave Soldering. Typical profiles are shown in Figures 12, 13 and 14.
When wave soldering, the MLN suppressor is attached to the circuit
board by means of an adhesive. The assembly is then placed on a con-
veyor and run through the soldering process to contact the wave. With IR
and Vapour Phase Reflow, the device is placed in a solder paste on the
substrate. As the solder paste is heated, it reflows and solders the unit to
the board.
The recommended solder for the MLN suppressor is a 62/36/2
(Sn/Pb/Ag), 60/40 (Sn/Pb), or 63/37 (Sn/Pb). Littelfuse also
recommends an RMA solder flux.
Wave soldering is the most strenuous of the processes. To avoid the
possibility of generating stresses due to thermal shock, a preheat stage
in the soldering process is recommended, and the peak temperature of
the solder process should be rigidly controlled.
Typical Performance Curves
Any Single Section (Continued)
FIGURE 10. IMPEDANCE vs FREQUENCY
FIGURE 11. ADJACENT CHANNEL CROSSTALK
10000
1000
100
10
1
0.1
1MHz
10MHz
100MHz
1GHz
10GHz
FREQUENCY
IMPED
ANCE (Z)
0
-20
-40
-60
-80
-100
-120
1kHz
100kHz
10kHz
1MHz
10MHz
100MHz
1GHz
FREQUENCY
CR
OSST
ALK (dB)
V
IN
= 1V
RMS
Z = 50
When using a reflow process, care should be taken to ensure that the
MLN chip is not subjected to a thermal gradient steeper than 4 degrees
per second; the ideal gradient being 2 degrees per second. During the
soldering process, preheating to within 100 degrees of the solders peak
temperature is essential to minimize thermal shock. Examples of the sol-
dering conditions for the MLN array of suppressors are given in the
tables below.
Once the soldering process has been completed, it is still necessary to
ensure that any further thermal shocks are avoided. One possible cause of
thermal shock is hot printed circuit boards being removed from the solder
process and subjected to cleaning solvents at room temperature. The
boards must be allowed to gradually cool to less than 50
o
C before cleaning.
MLN SurgeArray
TM
Suppressor
Surface Mount Varistors
Multiline Transient Voltage Surge Suppressor
155
w w w . l i t t e l f u s e . c o m
3
SURF
A
CE MOUNT
V
ARIST
ORS
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