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TVS在汽车电子中的应用.pdf


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VISHAY GENERAL SEMICONDUCTOR
一级代理:威柏电子有限公司
Transient Voltage Suppressors Application Note
Transient Voltage Suppressors (TVS) for
Automotive Electronic Protection
By Soo Man (Sweetman) Kim, 8 μs 8 μs/20 μs
Senior Application Manager IPPM
100 %
A major challenge in automotive design is protecting
electronics - such as control units, sensors, and
entertainment systems - against damaging surges, voltage
transients, ESD, and noise that are present on the power
IPPM
line. Transient voltage suppressors (TVS) are ideal solutions 2
for automotive electronic protection and have several
50 %
important parameters for these applications, including
power rating, stand-off voltage, breakdown voltage, and
maximum breakdown voltage. Following are definitions for
these parameters.
Power rating
The power rating of a TVS is its surge-absorbing capability
0 %
under specific test or application conditions. The industrial- 0 5 1015 20 25
standard test condition of 10 μs/1000 μs pulse form (μs)
(Bellcore 1089 spec.), as shown in Figure 1. This test Fig. 2 - Test Waveform of TVS ESD
condition differs from the TVS ESD test condition of
8 μs/20 μs pulse form, as shown in Figure 2.
Breakdown Voltage (VBR)
The breakdown voltage is the voltage at which the device
10 µs 10 μs/1000 μs
goes into avalanche breakdown, and is measured at a
100 % specified current on t

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  • 时间2014-06-19