TSI200B1 STMICROELECTRONICS [STMicroelectronics], TSI200B1 Datasheet - Page 3

• Manufacturer Part Number: TSI200B1
• Description: TERMINAL SET INTERFACE PROTECTION AND DIODE BRIDGE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ELECTRICAL PARAMETERS
The V
voltage of the application in normal operation. For
instance, if the maximum line voltage is ranging
between 100V
voltage, then the protection chosen for this applica-
tion shall have a V
The V
the voltage limit for which the component
short-circuits. Passing this V
turn on.
The I
on. Indeed, if we want a Trisil to be turned on not
only the voltage across it shall pass the V
but the current through it shall also pass the I
value.
In other words, if a voltage surge occurring on the
line is higher than the V
whereas the line surge current is limited to a value
that does not exceed the Trisil’s I
Trisil will never turn into short circuit. At this time
the surge will be clamped by the Trisil.
Anyhow the electronic circuitry located after the
Trisil will always be protected whatever the Trisil
state is (crowbar or clamping mode).
The I
Trisil is turned on, as soon as the crossing current
surge gets lower than this I
protection device turns back in its idle state.
Remark : for this reason the Trisil ‘s I
be chosen higher than what the maximum telecom
line current can be.
Fig. 2 : Test circuit for the CCITT K17 recommendations
BO
H
BO
RM
is the current that makes the device turn
stands for the holding current. When the
is the triggering voltage. This indicates
value corresponds to the maximum
RMS
RM
of ringing plus 48V of battery
close to 200V.
BO
BO
H
value of a Trisil,
makes the device
BO
value, the Trisil
value, then the
H
value shall
BO
value
BO
TSIxxB1 BEHAVIOUR WITH REGARD TO
SURGE STANDARD :
The TSIxxB1 is able to replace both diode bridge
and
terminals. Furthermore it complies with the CCITT
K17 recommendations :
usual
10/700 s waveform surge test, 1.5kV
AC power induction test
AC power contact test
discrete
protection
on
TSIxxB1
telecom
3/9