ACST210-8B

更新时间： 2024-01-29 04:08:47

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		栅极触发装置开关三端双向交流开关
页数	文件大小	规格书
13页	170K
描述
Overvoltage protected AC switch

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ACST210-8B 技术参数

ACST2

Application information

2.2

AC line transient voltage ruggedness

In comparison with standard Triacs, which are not robust against surge voltage, the ACST2

is self-protected against over-voltage, specified by the new parameter V . In addition, the

ACST2 is a sensitive device (I = 10 ma), but provides a high noise immunity level againast

fast transients. The ACST2 switch can safely withstand AC line transient voltages either by

clamping the low energy spikes, such as inductive spikes at switch off, 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 ramp up.

The test circuit of Figure 17 represents the ACST2 application, and is used to stress the

ACST switch according to the IEC 61000-4-5 standard conditions. With the additional effect

of the load which is limiting the current, the ACST switch withstands the voltage spikes up to

2 kV on top of the peak line voltage. The protection is based on an overvoltage crowbar

technology. The ACST2 folds back safely to the on state as shown in Figure 18. The ACST2

recovers its blocking voltage capability after the surge and the next zero current crossing.

Such a non repetitive test can be done at least 10 times on each AC line voltage polarity.

Figure 17. Overvoltage ruggedness test circuit for resistive and inductive loads for

IEC 61000-4-5 standards

R = 20 Ω, L = 10 µH, V

= 2 kV

Surge generator

2kV surge

Rgene

Model of the load

Filtering unit

ACST210-8x

AC Mains

Doc ID 13304 Rev 3

7/13

1...4 5 678 9 10...13

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型号	品牌	描述	获取价格	数据表
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ACST210-8FP	STMICROELECTRONICS	Overvoltage protected AC switch	获取价格
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