TISP61521 查看數據表（PDF） - Bourns, Inc

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产品描述 (功能)

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TISP61521

DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS

Bourns, Inc 

TISP61521 SLIC Protector

0

-20

VK

-40

VBATH

-60

-80

0.0

1

QGS

0

0.5

1.0

Time - µs

IG

1.5

AI6XD E

-1

-2

IK

-3

-4

-5

0.0

0.5

1.0

1.5

Time - µs

Figure 5. Protector Fast Impulse Clamping and Switching Waveforms

Application Circuit

Figure 6 shows a typical TISP61521 SLIC card protection circuit. The incoming line conductors, Ring (R) and Tip (T), connect to the relay

matrix via the series overcurrent protection. Fusible resistors, fuses and positive temperature coefficient (PTC) resistors can be used for

overcurrent protection. Resistors will reduce the prospective current from the surge generator for both the TISP61521 and the ring/test

protector. The TISP7xxxF3 protector has the same protection voltage for any terminal pair. This protector is used when the ring generator

configuration may be ground or battery-backed. For dedicated ground-backed ringing generators, the TISP3xxxF3 gives better protection as

its inter-conductor protection voltage is twice the conductor to ground value.

Relay contacts 3a and 3b connect the line conductors to the SLIC via the TISP61521 protector. The protector gate reference voltage comes

from the SLIC negative supply (VBATH). A 220 nF gate capacitor sources the high gate current pulses caused by fast rising impulses.

APRIL 2001 REVISED FEBRUARY 2005

Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

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