Programmable transient voltage suppressor for SLIC protection
Figure 1. LCP1531 functional diagram
Datasheet - production data
• Dual programmable transient suppressor
• Wide negative firing voltage range:
VGn = -175 V max.
• Low dynamic switching voltages:
VFP and VDGL
• Low gate triggering current: IGT = 5 mA max
• Peak pulse current: IPP = 37.5 A (5/310 µs)
• Holding current: IH = 150 mA min.
• Low space consuming package
• A Trisil™ is not subject to ageing and provides
a fail-safe mode in short circuit for better
• Trisils are used to help equipment to meet
various standards such as YDT695, GR-1089
and ITU-T K20/21.
• Trisils are UL94 V0 resin approved and are
UL497B approved [file: E136224]).
These devices are ideally suited to meet the
protection requirement of VoIP SLICs located in
next generation residential gateways. They can
be used for protecting any ringing SLIC since they
meet the protection standard requirements.
Positive overvoltages are clamped by 2 diodes.
Negative surges are suppressed by 2 thyristors,
their breakdown voltage being referenced to -VBAT
through the gate.
These components present a very low gate
triggering current (IGT) to reduce the current
consumption on printed circuit board during the
TM: Trisil is a trademark of STMicroelectronics
This is information on a product in full production.
DocID13397 Rev 5