TSI200B1RL View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TSI200B1RL

TERMINAL SET INTERFACE PROTECTION AND DIODE BRIDGE

STMicroelectronics 

TEST # 2

AC POWER INDUCTION TEST

This test simulates the induction phenomena that

can happen between telecom lines and AC mains

lines (fig. 4).

Fig. 4 : AC power induction test circuit

TSIxxB1

TEST #3

AC POWER CONTACT TEST

This test simulates the direct contact between the

telecom lines and the AC mains lines.

The AC power contact test consists in applying

240VRMS through a 10Ω PTC during 15 minutes

long on the device under test. The CCITT K17

recommendation specifies an internal generator

impedance allowing 10 ARMS when in short circuit.

The behavior of the TSI200B1 with respect to this

surge is given in figure 6.

Fig. 6 : Voltage at the TSI200B1 + & - terminations

and the current through it.

Part #1

test conditions :

Part #2

test conditions :

VRMS = 240 V

R = 600 Ω

t = 0.2 s

VRMS = 600 V

R = 600 Ω

t = 0.2 s

Fig. 5 : Voltage at the + and - terminations of the

TSI200B1, and current through it

while test part 1 is applied.

The figure 6 shows that after 250ms there is no

current anymore flowing through the TSI200B1

device. This is due to the action of the serial PTC

that limits the current through the line. This PTC is

mandatory for this test. It can also be replaced by a

fuse or any other serial protection that "opens" the

line loop under AC contact test.

The TSIxxB1 withstand the AC power induction

test in both cases.

5/9

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