TISP61089 Gated Protector Series
APPLICATIONS INFORMATION
Application Circuit (Continued)
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 ’61089 protector. The protector gate reference voltage comes from
the SLIC negative supply (V
BAT
). A 220 nF gate capacitor sources the high gate current pulses caused by fast rising impulses.
SLIC
PROTEC TOR
SLIC
SLIC
PROTEC TOR
SLIC
I
K
Th5
'61089
C1
220 nF
I
G
V
BAT
AI6XAHC
I
F
Th5
'61089
C1
220 nF
V
BAT
AI6XAIC
Figure 4. Negative Overvoltage Condition
Figure 5. Positive Overvoltage Condition
OVER-
CURRENT
PROTEC TION
TIP
WIRE
RSa
RING/TEST
PROTEC TION
Th1
TEST
RELAY
RING
RELAY
SLIC
RELAY
S3a
SLIC
PROTEC TOR
Th4
SLIC
S1a
Th3
S2a
RING
WIRE
RSb
Th2
TISP
3xxxF3
OR
7xxxF3
S3b
S1b
S2b
Th5
'61089
C1
220 nF
V
BAT
TEST
EQUIP-
MENT
RING
GENERATOR
AI6XAJC
Figure 6. Typical Application Circuit
NOVEMBER 1995 - REVISED JANUARY 2007
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
