LCP1521 Datasheet, PDF (1/9 Pages) STMicroelectronics – PROGRAMMABLE TRANSIENT VOLTAGE SUPPRESSOR FOR SLIC PROTECTION

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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.
FUNCTIONAL DIAGRAM
This component presents a very low gate trigge-
ring current (IGT) in order to reduce the current con-
TIP
TIP
sumption on printed circuit board during the firing
phase.
GATE
GND
A particular attention has been given to the internal
wire bonding. The Kelvin method configuration en-
sures reliable protection, reducing the overvoltage
NC
GND
introduced by the parasitic inductances of the wir-
ing L x(dI/dt), especially for very fast transients.
RING
RING
September 1999 - Ed: 2A
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