AN2053 datasheet(9/15 Pages) STMICROELECTRONICS

Numer części	AN2053

Szczegółowy opis	SLIC protection for both classical and new networks

PDF	15 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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9 / 15 page

AN2053

Long line protection

Doc ID 10917 Rev 2

9/15

Figure 12.

LCP15xx behavior during ITU-T K20 power crossing test (600

Ω)

Figure 12 shows both voltage across the TIP pin of a LCP15xx and current through it when

submitted to a 230 Vrms 600 Ω power crossing ITU-T K20 surge. The voltage trip at the TIP

pin is roughly between +1 V and the battery voltage (-48 V).

Figure 13.

SLIC with internal ring signal management

In the case of Figure 13 the SLIC is supplied by one positive +Vb and one negative -Vbat.

This allows the output pins to manage a signal within this voltage range and in particular to

operate in DC biased ring signal mode. For this topology only one protection stage is

needed to perform a fine response when a transient reaches the +Vb or -Vbat limit.

The LCPx2-150B1 covers the 30 A 10/1000 µs applications without any series resistance

while it needs series resistance Rs (for example PTC) for 50 A applications.

Is : 200mA/div

V tip : 20V/div

LCPx2-150B1

SLIC

-V bat

+V b

Line

Tip

Ring

PTC or Fuse

(*)

(*) Not mandatory

+V b

AN2053 Arkusz danych(PDF) 9 Page - STMicroelectronics