TSI200B1 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
TSI200B1 Datasheet PDF : 9 Pages
| |||
ELECTRICAL PARAMETERS
The VRM value corresponds to the maximum
voltage of the application in normal operation. For
instance, if the maximum line voltage is ranging
between ±100VRMS of ringing plus 48V of battery
voltage, then the protection chosen for this applica-
tion shall have a VRM close to 200V.
The VBO is the triggering voltage. This indicates the
voltage limit for which the component
short-circuits. Passing this VBO makes the device
turn on.
TSIxxB1
TSIxxB1 BEHAVIOUR WITH REGARD TO
SURGE STANDARD :
The TSIxxB1 is able to replace both diode bridge
and usual discrete protection on telecom
terminals. Furthermore it complies with the CCITT
K17 recommendations :
10/700 µs waveform surge test, ± 1.5kV
AC power induction test
AC power contact test
The IBO is the current that makes the device turn
on. Indeed, if we want a Trisil to be turned on not
only the voltage across it shall pass the VBO value
but the current through it shall also pass the IBO
value.
In other words, if a voltage surge occurring on the
line is higher than the VBO value of a Trisil, whereas
the line surge current is limited to a value that does
not exceed the Trisil’s IBO value, then the 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 IH stands for the holding current. When the
Trisil is turned on, as soon as the crossing current
surge gets lower than this IH value, the Trisil
protection device turns back in its idle state.
Remark : for this reason the Trisil ’s IH value shall
be chosen higher than what the maximum telecom
line current can be.
Fig. 2 : Test circuit for the CCITT K17 recommendations
Ω
3/9
Share Link: 