Datasheet > LCP12

LCP12

更新时间： 2022-02-26 12:50:14

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
10页	215K
描述
Protection IC for ringing SLICs

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LCP12 数据手册

Technical information

LCP12

For a line card with 50 Ω of series resistors which has to be qualified under GR-1089 1000 V

10/1000 µs surge, the present current through the LCP12 is equal to:

I surge = 1000 / (10 + 50) = 17 A

The LCP12 topology is particularly optimized for the new telecom applications such as fiber

in the loop, WLL systems, and decentralized central office, for example.

Figure 8. Protection of SLIC with positive and negative battery voltages

Line card

-Vbat

Rs (*)

TIP

220nF

GND

LCP12

RING

Line

SLIC

RING

220nF

Rs (*)

+Vb

Rs (*) = PTC or Resistor fuse

Figure 8 shows the classical protection topology for SLIC using both positive and negative

battery voltages. With such a topology the SLIC is protected against surge over +Vb and

lower than -Vbat. In this case, +Vb can be programmed up to +120 V while -Vbat can be

programmed down to -120 V.

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