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參數(shù)資料
| 型號(hào)： | TSI265B1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | TERMINAL SET INTERFACE PROTECTION AND DIODE BRIDGE |
| 中文描述： | Set接口端子保護(hù)和二極管橋 |
| 文件頁(yè)數(shù)： | 3/9頁(yè) |
| 文件大小： | 173K |
| 代理商： | TSI265B1 |
The V
RM
value corresponds to the maximum
voltage of the application in normal operation. For
instance, if the maximum line voltage is ranging
between
±
100V
RMS
of ringing plus 48V of battery
voltage, then the protection chosen for this applica-
tion shall have a V
RM
close to 200V.
The V
BO
is the triggering voltage. This indicates the
voltage
limit
for
which
short-circuits. Passing this V
BO
makes the device
turn on.
the
component
The I
BO
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 V
BO
value
but the current through it shall also pass the I
BO
value.
In other words, if a voltage surge occurring on the
line is higher than the V
BO
value of a Trisil, whereas
the line surge current is limited to a value that does
not exceed the Trisil’s I
BO
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 I
H
stands for the holding current. When the
Trisil is turned on, as soon as the crossing current
surge gets lower than this I
H
value, the Trisil
protection device turns back in its idle state.
Remark : for this reason the Trisil ’s I
H
value shall
be chosen higher than what the maximum telecom
line current can be.
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
μ
s waveform surge test,
±
1.5kV
AC power induction test
AC power contact test
ELECTRICAL PARAMETERS
Fig. 2 :
Test circuit for the CCITT K17 recommendations
TSIxxB1
3/9
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