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PDF LCP1521 Data sheet ( Hoja de datos )
| Número de pieza | LCP1521 | |
| Descripción | PROGRAMMABLE TRANSIENT VOLTAGE SUPPRESSOR FOR SLIC PROTECTION | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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®
Application Specific Discretes
A.S.D.TM
LCP1521
PROGRAMMABLE TRANSIENT VOLTAGE
SUPPRESSOR FOR SLIC PROTECTION
FEATURES
Dual programmable transient suppressor
Wide negative firing voltage range:
VMGL = -150 V max.
Low dynamic switching voltages: VFP and VDGL
Low gate triggering current: IGT = 2 mA max
Peak pulse current: IPP = 30 A (10/1000 µs)
Holding current: IH = 150 mA
SO-8
DESCRIPTION
This device has been especially designed to pro-
tect new high voltage, as well as classical SLICs,
against transient overvoltages.
Positive overvoltages are clipped with 2 diodes.
Negative surges are suppressed by 2 thyris-
tors, their breakdown voltage being referenced
to -VBAT through the gate.
This component presents a very low gate trigge-
ring current (IGT) in order to reduce the current con-
sumption on printed circuit board during the firing
phase.
A particular attention has been given to the internal
wire bonding. The Kelvin method configuration en-
sures reliable protection, reducing the overvoltage
introduced by the parasitic inductances of the wir-
ing L x(dI/dt), especially for very fast transients.
FUNCTIONAL DIAGRAM
TIP
GATE
NC
RING
TIP
GND
GND
RING
September 1999 - Ed: 2A
1/9
1 page  
FUNCTIONAL HOLDING CURRENT (IH) TEST CIRCUIT : GO-NO GO TEST
LCP1521
VBAT = - 100 V
R
D.U.T.
- VP
Surge generator
This is a GO-NO GO test which allows to confirm the holding current (IH) level in a functional test circuit.
TEST PROCEDURE :
- Adjust the current level at the IH value by short circuiting the D.U.T.
- Fire the D.U.T. with a surge current : IPP = 10A, 10/1000µs.
- The D.U.T. will come back to the off-state within a duration of 50ms max.
TEST CIRCUIT FOR VFP AND VDGL PARAMETERS
(V is defined in unload condition)
P
L
R2
VP C1
R1
R4
R3
C2
TIP
R ING
G ND
Pulse (µs) Vp C1 C2 L R1 R2 R3 R4 IPP Rp
tr tp (V) (µF) (nF) (µH) (Ω) (Ω) (Ω) (Ω) (A) (Ω)
10 700 1500 20 200
0
50 15 25 25 30 10
1.2 50 1500 1 33 0 76 13 25 25 30 10
2 10 2500 10 0 1.1 1.3 0 3 3 38 62
5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LCP1521.PDF ] | |
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