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ACST10 Datasheet(PDF) 8 Page - STMicroelectronics |
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ACST10 Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 12 page Ordering information scheme ACST10 8/12 2.2 AC line transient voltage ruggedness In comparison with standard TRIACs, which are not robust against surge voltage, the ACST10 is self-protected against over-voltage, specified by the new parameter VCL. The ACST10 switch can safely withstand AC line transient voltages either by clamping the low energy spikes or by switching to the on state (for less than 10 ms) to dissipate higher energy shocks through the load. This safety feature works even with high turn-on current rises. The test circuit of Figure 17 represents the ACST10 application, and is used to stress the ACST switch according to the IEC 61000-4-5 standard conditions. Thanks to the load which is limiting the current, the ACST switch withstands the voltage spikes up to 2 kV above the peak line voltage. The protection is based on an overvoltage crowbar technology. The ACST10 switches safely to the on state as shown in Figure 18. The ACST10 recovers its blocking voltage capability after the surge. Such a non repetitive test can be done at least 10 times on each AC line voltage polarity. 3 Ordering information scheme Figure 19. Ordering information scheme Figure 17. Overvoltage ruggedness test circuit for resistive and inductive loads for IEC 61000-4-5 standards Figure 18. Typical current and voltage waveforms across the ACST10 during IEC 61000-4-5 standard test L AC Mains R Filtering unit Rg Model of the load Rgene Surge generator ACST12 2kV surge C L R = 8 , L = 4 µH, Vsurge = 2 kV Ω V OUT I OUT V PEAK =V CL ACST 10 - 7 C T AC Switch On-state rms current Repetitive peak off-state voltage Triggering gate current Package 10 = 10A 7 = 700V S = 10 mA C = 35 mA FP = TO-220FPAB T = TO-220AB |
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