LCP1521S STMicroelectronics, LCP1521S Datasheet - Page 7

• Manufacturer Part Number: LCP1521S
• Description: IC TVS DUAL PROGRMMBL SLIC 8SOIC
• Manufacturer: STMicroelectronics
• Type: TSPDr

Specifications of LCP1521S

• Technology: Programmable TVS
• Number Of Circuits: 2
• Applications: SLIC
• Package / Case: 8-SOIC (3.9mm Width)
• Hold Current: 150mA
• Gate Trigger Current (max): 5mA
• Gate Trigger Voltage (max): 2.5V
• Package Type: SO
• Peak Repeat Off Current: 5uA
• Peak Surge On-state Current (max): 18A
• Mounting: Surface Mount
• Pin Count: 8
• Operating Temp Range: -55C to 150C
• Operating Temperature Classification: Military
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Voltage - Working: -
• Voltage - Clamping: -
• Lead Free Status / Rohs Status: Compliant

LCP1521S/LCP152DEE
Figure 7.
Figure 8.
24
20
16
12
1.E-02
8
4
0
I
TSM
(A)
1.E-01
imposed by the various country standards. Taking into account this fact the actual lightning
surge current flowing through the LCP is equal to:
e.g. For a line card with 30 Ω of series resistors which has to be qualified under GR1089
Core 1000V 10/1000 µs surge, the actual current through the LCP152 is equal to:
The LCP152 is particularly optimized for the new telecom applications such as the fiber in
the loop, the WLL, the remote central office. In this case, the operating voltages are smaller
than in the classical system. This makes the high voltage SLICs particularly suitable.
The schematics of
Protection of high voltage SLIC
Surge peak current versus overload
duration
Rs (*) = PTC or fuse resistor
Line
I
I
surge
surge
1.E+00
t(s)
With:
V
R
R
= V
= 1000 / (10 + 30) = 25 A
g
s
surge
= series resistor of the surge generator
= series resistor of the line card (e.g. PTC)
surge
1.E+01
= peak surge voltage imposed by the standard.
GND
Figure 7.
Line card
Rs (*)
/ (R
Rs (*)
g
1.E+02
220nF
T
+ R
j
initial=25°C
F=50Hz
Gate
give the most frequent topology used for these applications.
s
)
1.E+03
LCP152xx
GND
RING
TIP
Figure 9.
1.3
1.2
1.1
0.9
0.8
0.7
1
-40
I [T ] / I [T =25°C]
H
GND
-30
j
H
-20
j
Relative variation of holding
current versus junction
temperature
-10
0
-Vbat
TIP
RING
10
SLIC
20
T (°C)
j
30
Technical information
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