TISP61089BDR Bourns Inc., TISP61089BDR Datasheet - Page 18

• Manufacturer Part Number: TISP61089BDR
• Description: SURGE SUPP SLIC PROG HV 8-SOP
• Manufacturer: Bourns Inc.

Specifications of TISP61089BDR

• Package / Case: 8-SOIC (3.9mm Width)
• Voltage - Breakover: *
• Voltage - Off State: 170V
• Current - Peak Pulse (10 X 1000µs): 30A
• Current - Hold (ih): 150mA
• Number Of Elements: 2
• Capacitance: 100pF
• Applications: SLIC
• Number Of Circuits: 2
• Voltage - Working: -100V
• Voltage - Clamping: -112V
• Technology: Mixed Technology
• Breakover Current Ibo Max: 6.5 A
• Rated Repetitive Off-state Voltage Vdrm: 170 V
• Off-state Leakage Current @ Vdrm Idrm: 0.005 mA
• Holding Current (ih Max): 150 mA
• Mounting Style: SMD/SMT
• Power (watts): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
The overcurrent protector should not allow current-time durations greater than the TISP61089B current ratings, otherwise the TISP61089B
may fail. A satisfactory fusible resistor performance is shown in Figure 20. The line feed resistor (LFR) current-time curve is above the first-level
currents and below the TISP61089B rated current for V
tolerance, 0.5 % matched resistor module. Fusible resistors are also available with integrated thermal fuses or PTC thermistors. Thermal fuses
will cause a rapid drop in the operating current after about 10 s. Figure 20 shows the fused LFR curve for a Bourns 4B04B-524-400 2 x 40 Ω,
2 % tolerance, 0.5 % matched resistor module with integrated thermal fuse links. The Bourns 4B04B-524-400 allows the TISP61089B to
operate down to its full rated voltage of V
limiting function for all but the highest currents.
Ceramic PTC thermistors are available in suitable ohmic values to be used as the series line feed resistor R
ceramic PTC thermistor operating characteristic. Some of the first-level tests will cause thermistor operation. Generally, the resistance
matching stability of the two PTC thermistors after power fault switching lightning will meet the required line balance performance.
Ceramic PTC thermistors reduce in resistance value under high voltage conditions. Under high current impulse conditions, the resistance can
be less than 50 % of the d.c. resistance. This means that more current than expected will flow under high voltage impulse conditions. The
manufacturer should be consulted on the 2/10 currents conducted by their product under ‘1089 conditions. To keep the 2/10 current below
120 A, an increase of the PTC thermistor d.c. resistance value to 50 Ω or more may be needed. In controlled temperature environments, where
the temperature does not drop below freezing, the TISP61089B 2/10 capability is about 170 A, and this would allow a lower value of
resistance.
Generally, polymer PTC thermistors are not available in sufficiently high ohmic values to be used as the only line feed resistance. To meet the
required resistance value, an addition (fixed) series resistance can be used. Figure 22 overlays a typical polymer PTC thermistor operating
characteristic. Compared to ceramic PTC thermistors, the lower thermal mass of the polymer type will generally give a faster current reduction
time than the ceramic type. However, in this case the polymer resistance value is much less than the ceramic value. For the same current level,
the dissipation in the polymer thermistor is much less than the ceramic thermistor. As a result, the polymer thermistor is slower to operate than
the ceramic one.
The resistance stability of polymer PTC thermistors is not as good as ceramic ones. However, the thermistor resistance change will be diluted
by additional series resistance. If an SLIC with adaptive line balance is used, thermistor resistance stability may not be a problem. Polymer
PTC thermistors do not have a resistance decrease under high voltage conditions.
OCTOBER 2000 - REVISED JULY 2008
Overcurrent and Overvoltage Protection Coordination (Continued)
TISP61089B High Voltage Ringing SLIC Protector
Figure 20. Line Feed Resistor - with and without Thermal Fuse
0.15
1.5
0.8
0.6
0.5
0.4
0.3
0.2
50
40
30
20
15
10
GG
8
6
5
4
3
2
1
0.01
= -155 V. An LFR with integrated PTC thermistors will give an automatically resettable current
25 Ω Ω Ω Ω & 40 Ω Ω Ω Ω
through 5,
First Level
Tests # 1
LFR
0.1
GG
CURRENT DURATION
t — Current Duration — s
> -100 V. This particular curve is for a Bourns 4B04B-523-400 2 x 40 Ω, 2 %
PEAK AC
1
Fused LFR
vs
10
V
GG
= -120 V
V
100
GG
= -60 V
AI6XDKA
1000
S
. Figure 21 overlays a typical