參數(shù)資料
型號(hào)： TC04A-200TD
廠商： Semtech Corporation
元件分類(lèi)： 圓形連接器
英文描述： Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT02; Number of Contacts:5; Connector Shell Size:14; Connecting Termination:Solder; Circular Shell Style:Box Mount Receptacle
中文描述： 電池跟蹤TransClamp保護(hù)對(duì)于用戶接口線卡
文件頁(yè)數(shù)： 5/8頁(yè)
文件大小： 276K
代理商： TC04A-200TD
5
2000 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
TC04A-200
Applications Information (continued)
TC04 IV Characteristic Curve
Operation of Battery Tracking TransClamp
Telecommunications lines are vulnerable to transient
disturbances from a variety of sources. Disturbances
strike the line or near it and are then propagated to
the extremities of the lines where sensitive electronics
are located. The TransClamp series of thyristor surge
suppressors are designed to protect sensitive telecom-
munications equipment from transient voltages result-
ing from lightning strikes and AC power line distur-
bances.
The TC04A-200 utilizes internal diodes connected from
each line to ground provide protection from positive
overvoltages. During a positive duration transient,
these internal diodes are forward biased shunting the
transient current to ground. The voltage seen by the
protected IC will be the forward clamping voltage (V
CF)
of the diode. A gated TVS thyristor provides protection
against negative surges. When the voltage on the Tip
or Ring line falls below the reference voltage at the
gate, the triggering diode begins to conduct forcing the
TVS thyristor to crowbar (turn-on) to a low on-state
voltage. The current required to trigger the thyristor is
defined as the switching current (I
S). The maximum
voltage seen by the protected IC will be the switching
voltage (V
S). Once the transient subsides, the device
will return to a high impedance (off-state) when the line
current falls below the holding current (I
H). The high
holding current of the TC04 prevents d.c. latch-up
because the holding current is higher than the SLIC
can source.
Protecting One SLIC Line Pair
The TC04A-200 battery tracking TransClamp is specifi-
cally designed to protect subscriber line interface
circuits (SLICs). The protection voltage of the device is
referenced to the systems DC battery voltage. There-
fore, the protection voltage will be essentially the same
as the SLIC supply voltage, minimizing the stress on
the protected device. The TC04A-200 may be refer-
enced to battery voltages ranging from -5V to -100V.
Pins 1-4 are connected to Tip line or A-lead and pins
13-16 are connected to the Ring line or B-lead. The
battery feed voltage source is connected to the gate of
the internal SCRs at pins 6 & 11. Pins 7-10 are
connected to ground. All ground pins should be con-
nected for best results. A 0.1F capacitor is recom-
mended between the gate & ground to speed up the
triggering of the device.
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
TC04 Connection Diagram
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