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PDF TC03A-200 Data sheet ( Hoja de datos )
| Número de pieza | TC03A-200 | |
| Descripción | Battery Tracking TransClamp For SLIC Linecard Protection | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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PROTECTION PRODUCTS
Description
The battery tracking TransClamp series of transient
voltage suppressors (TVS) are designed to protect
subscriber line interface circuits (SLIC) from transient
voltages resulting from lightning strikes and AC power
line disturbances. The TC03A-200 integrates all the
components necessary to protect SLIC ICs from line to
ground for positive and negative transients.
For negative transient events, the TVS thyristor will
crowbar or “fire” when the line voltage exceeds the
gate reference voltage. The gate voltage is referenced
to the battery voltage ( -VBAT ) plus the VF of the series
rectifier. The device firing voltage range is -5V to
-100V. External diodes are used to shunt positive
transients to ground.
These devices are designed to meet industry standard
transient immunity requirements such as Bellcore TR-
NWT-001089, FCC Part 68, ITU K17-K20, and IEC
61000-4-5. The high surge capability is advantageous
in harsh environments, and offers better reliability than
"low surge" rated devices. The integrated design saves
board space and increases equipment reliability by
replacing multiple discrete components. The device
may be used to protect any SLIC and is particularly
suited for those with integrated ring generators.
TC03A-200
Battery Tracking TransClamp™
For SLIC Linecard Protection
PRELIMINARY
Features
! Transient protection for telecommunications lines to
Bellcore 1089 (long haul), VDE 0433, ITU K20
IEC 61000-4-5 (Lightning), and FCC Part 68
! High surge current rating (100A, tp = 10/1000µs)
! Protects up to two Tip & Ring line pairs
! Gate firing voltage is referenced to the system
battery voltage
! Wide firing voltage range: -5V to -100V
! High holding current: 200mA
! Replaces discrete components
! Solid-state TVS process technology
Mechanical Characteristics
! JEDEC SOT-89 package
! Molding compound flammability rating:
UL 94V-0
! Marking : Part number, date code, logo
! Packaging : Tape and Reel per EIA 481
Applications
! Subscriber Line Interface Circuit (SLIC) Protection
! Central Office Equipment
! ISDN Terminal Adaptors
! Cable Telephony
! Small Office Home Office (SOHO) Applications
! Wireless Local Loop (WLL)
Circuit Diagram
Schematic & PIN Configuration
Line
1
-VBat
3
Revision 9/2000
2
GND
1
1
LINE
2
GND
3
GATE
SOT-89 (Top View)
www.semtech.com
1 page  
PROTECTION PRODUCTS
Applications Information (continued)
Protecting One SLIC Line Pair
The TC03A-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 system’s 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 TC03A-200 may be refer-
enced to battery voltages ranging from -5V to -100V.
Pin 1 is connected to the line (A-lead or B-lead). The
battery feed voltage source is connected to the gate of
the internal SCR at pin 3. Pin 2 is connected to
ground. A 0.1µF capacitor is recommended between
the gate & ground to speed up the triggering of the
device.
Protecting Multiple SLIC Lines
The TC03A-200 may be used in conjunction with
steering diodes to protect up to two SLIC Tip & Ring
line pairs. The steering diodes shunt positive surges to
ground. In this configuration, each line pair may be
surged to 100A (tp=10/100µs) independantly, or all
four pairs may be surged simultaneously up to 50A
(tp=10/100µs). This provides the designer with a
flexible, cost effective solution and increased reliability
over low current protection schemes.
Typical Applications
TCO3A-200
PPRREELLIIMINARY
TC03 Connection Diagram
1
LINE
2
GND
3
GATE
2000 Semtech Corp.
TC03A-200
TC03A-200
Protecting SLIC with Integrated Ring Generator
5
www.semtech.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet TC03A-200.PDF ] | |
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