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LCP152DEERL

P1-P3P4-P6P7-P9P10-P11
Obsolete Product(s) - Obsolete Product(s)
Characteristics LCP1521S/LCP152DEE
4/11
Table 6. Parameters related to the diode LINE / GND (T
amb
= 25° C)
Symbol Test conditions Max Unit
V
F
I
F
= 5A t = 500 µs 3 V
V
FP
(1)
1. See test circuit for V
FP
(Figure 4.): R
S
is the protection resistor located on the line card.
10/700 µs
1.2/50 µs
2/10 µs
1.5 kV
1.5 kV
2.5 kV
R
S
= 10 Ω
R
S
= 10 Ω
R
S
= 62 Ω
5
9
30
V
Table 7. Parameters related to the protection Thyristors (T
amb
= 25° C, unless
otherwise specified)
Symbol Test conditions Typ Max Unit
I
GT
V
GND / LINE
= -48 V 0.1 5 mA
I
H
V
GATE
= -48 V
(1)
1. see functional holding current (I
H
) test circuit
150 mA
V
GT
at I
GT
2.5 V
I
RG
V
RG
= -150 V
V
RG
= -150 V
T
j
= 25° C
T
j
= 85° C
5
50
µA
V
DGL
V
GATE
= -48 V
(2)
2. see test circuit for V
DG
The oscillations with a time duration lower than 50ns are not taken into account.
10/700 µs
1.2/50 µs
2/10 µs
1.5 kV
1.5 kV
2.5 kV
R
S
= 10 Ω
R
S
= 10 Ω
R
S
= 62 Ω
I
PP
= 30 A
I
PP
= 30 A
I
PP
= 38 A
7
10
25
V
Table 8. Parameters related to diode and protection Thyristors (Tamb = 25° C,
unless otherwise specified)
Symbol Test conditions Typ Max Unit
I
RM
V
GATE
/ LINE
= -1 V V
RM
= -150 V
VG
AT E / L I N E
= -1 V V
RM
= -150 V
T
j
= 25° C
T
j
= 85° C
5
50
µA
C
V
R
= 50 V bias, V
RMS
= 1 V, F = 1 MHz
V
R
= 2 V bias, V
RMS
= 1 V, F = 1 MHz
15
35
pF
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Obsolete Product(s) - Obsolete Product(s)
LCP1521S/LCP152DEE Characteristics
5/11
Figure 3. Functional Holding Current (I
H
) test circuit: GO-NO GO test
Figure 4. Test circuit for V
FP
and V
DGL
parameters
Pulse (µs)
V
p
(V)
C
1
(µF)
C
2
(nF)
L
(µH)
R
1
(Ω)
R
2
(Ω)
R
3
(Ω)
R
4
(Ω)
I
PP
(A)
R
s
(Ω)
t
r
t
p
107001500202000 501525253010
1.25015001 33 0 761325253010
2 10 2500 10 0 1.1 1.3 0 3 3 38 62
R
V
BAT
= - 100V
Surge generator
D.U.T
This is a GO-NO GO test which allows to confirm the holding current (I ) level in a functional test circuit.
- Adjust the current level at the I value by short circuiting the D.U.T.
- Fire the D.U.T. with a surge current: I = 10A, 10/1000µs
- The D.U.T. will come back to the off-state within a duration of 50ms max.
H
H
PP
TEST PROCEDURE:
CC
R
R
TIP
RING
GND
V
P
4
3
2
R
2
R
1
(V is defined in unload condition)
P
L
1
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Obsolete Product(s) - Obsolete Product(s)
Technical information LCP1521S/LCP152DEE
6/11
2 Technical information
Figure 5. LCP152 concept behavior
Figure 5. shows the classical protection circuit using the LCP152 crowbar concept. This
topology has been developed to protect the new high voltage SLICs. It allows to program the
negative firing threshold while the positive clamping value is fixed at GND.
When a negative surge occurs on one wire (L1 for example) a current IG flows through the
base of the transistor T1 and then injects a current in the gate of the thyristor Th1. Th1 fires
and all the surge current flows through the ground. After the surge when the current flowing
through Th1 becomes less negative than the holding current IH, then Th1 switches off.
When a positive surge occurs on one wire (L1 for example) the diode D1 conducts and the
surge current flows through the ground.
Figure 6. Example of PCB layout based on LCP152S protection
Figure 6. shows the classical PCB layout used to optimize line protection.
The capacitor C is used to speed up the crowbar structure firing during the fast surge edges.
This allows to minimize the dynamical breakover voltage at the SLIC Tip and Ring inputs
during fast strikes. Note that this capacitor is generally present around the SLIC - Vbat pin.
So to be efficient it has to be as close as possible from the LCP152 Gate pin and from the
reference ground track (or plan) (see Figure 6.). The optimized value for C is 220 nF.
The series resitors Rs1 and Rs2 designed in Figure 5. represent the fuse resistors or the
PTC which are mandatory to withstand the power contact or the power induction tests
V
Ring
GND
Gate
TIP
RING
GND
-Vbat
C
Rs1
Rs2
L 1
L 2
V Tip
Th1
D1
T1
IG
ID1
To
line side
22
0
nF
GND
To
SLIC side
LCP1521S
Obsolete Product(s) - Obsolete Product(s)
P1-P3P4-P6P7-P9P10-P11

LCP152DEERL

Mfr. #:
Buy LCP152DEERL
Manufacturer:
STMicroelectronics
Description:
ESD Suppressors / TVS Diodes Progam Suppressor
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