TISP2180L Bourns Inc., TISP2180L Datasheet - Page 10

• Manufacturer Part Number: TISP2180L
• Description: Sidacs
• Manufacturer: Bourns Inc.

Specifications of TISP2180L

• Breakover Current Ibo Max: 10 A
• Off-state Leakage Current @ Vdrm Idrm: 0.01 mA
• Forward Voltage Drop: 3 V
• Mounting Style: SMD/SMT
• Package / Case: SOT-82
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The electrical characteristics of a TISP
depend on the junction temperature at the instant of measurement. The values given in this data sheet were measured on commercial
testers, which generally minimize the temperature rise caused by testing. Application values may be calculated from the parameters’
temperature coefficient, the power dissipated and the thermal response curve, Z
Parameters.” TI Technical Journal, vol. 6, No. 4, pp.63-70, July-August 1989).
Wave Shape Notation
Most lightning tests, used for equipment verification, specify a unidirectional sawtooth waveform which has an exponential rise and an
exponential decay. Wave shapes are classified in terms of peak amplitude (voltage or current), rise time and a decay time to 50% of the
maximum amplitude. The notation used for the wave shape is amplitude, rise time/decay time. A 50 A, 5/310 µs wave shape would
have a peak current value of 50 A, a rise time of 5 µs and a decay time of 310 µs. The TISP
wave shapes of commonly used surges.
Generators
There are three categories of surge generator types, single wave shape, combination wave shape and circuit defined. Single wave
shape generators have essentially the same wave shape for the open circuit voltage and short circuit current (e.g. 10/1000 µs open cir-
cuit voltage and short circuit current). Combination generators have two wave shapes, one for the open circuit voltage and the other for
the short circuit current (e.g. 1.2/50 µs open circuit voltage and 8/20 µs short circuit current). Circuit specified generators usually
equate to a combination generator, although typically only the open circuit voltage waveshape is referenced (e.g. a 10/700 µs open cir-
cuit voltage generator typically produces a 5/310 µs short circuit current). If the combination or circuit defined generators operate into a
finite resistance, the wave shape produced is intermediate between the open circuit and short circuit values.
Current Rating
When the TISP
defined in terms of open circuit voltage, it is the current wave shape that must be used to assess the required TISP
As an example, the ITU-T K.21 1.5 kV, 10/700 µs open circuit voltage surge is changed to a 38 A, 5/310 µs current waveshape when
driving into a short circuit. Thus, the TISP
T K.21 waveform at 310 µs on the surge graph and not 700 µs. Some common short circuit equivalents are tabulated below:
Any series resistance in the protected equipment will reduce the peak circuit current to less than the generators’ short circuit value. A
1 kV open circuit voltage, 100 A short circuit current generator has an effective output impedance of 10 Ω (1000/100). If the equipment
has a series resistance of 25 Ω then the surge current requirement of the TISP
Electrical Characteristics
Lightning Surge
TISP1xxxF3 Overvoltage Protector Series
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device switches into the on-state it has a very low impedance. As a result, although the surge wave shape may be
IEC 61000-4-5, combination wave generator
Telcordia GR-1089-CORE
Telcordia GR-1089-CORE
FCC Part 68, Type A
FCC Part 68, Type A
FCC Part 68, Type B
ITU-T K.21
ITU-T K.20
Standard
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device are strongly dependent on junction temperature, T
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surge current capability, when directly connected to the generator, will be found for the ITU-
APPLICATIONS INFORMATION
Open Circuit Voltage Short Circuit Current
1.5 kV, <10/>160 µs
800 V, <10/>560 µs
1.0 kV, 10/1000 µs
1.5 kV, 10/700 µs
1.0 kV, 1.2/50 µs
1.5 kV, 9/720 µs
1 kV, 10/700 µs
2.5 kV, 2/10 µs
Customers should verify actual device performance in their specific applications.
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device becomes 29 A (1000/35) and not 100 A.
θ
(see M. J. Maytum, “Transient Suppressor Dynamic
200 A,<10/>160 µs
100 A,<10/>160 µs
100 A, 10/1000 µs
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37.5 A, 5/310 µs
37.5 A, 5/320 µs
25 A, 5/310 µs
500 A, 8/20 µs
500 A, 2/10 µs
surge current graph comprehends the
Specifications are subject to change without notice.
J
SEPTEMBER 1993 - REVISED SEPTEMBER 2008
. Hence, a characteristic value will
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surge capability.