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參數(shù)資料
| 型號： | ACST8 |
| 廠商： | 意法半導體 |
| 英文描述： | OVER VOLTAGE PROTECTED AC POWER SWITCH |
| 中文描述： | 過壓保護AC電源開關 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 126K |
| 代理商： | ACST8 |
ACST8
4/10
Figure 2: Typical Application Diagram
2. ROBUSTNESS AGAINST FAST CAPACITOR DISCHARGE
When parasitic transients or controller mis-operation occur, the blocked switch may turn on by spurious
switch firing. Since the phase shift capacitor is charged, its energy is instantaneously dissipated through
the two ACSTs which can be destroyed. To prevent such a failure, a resistive inductive circuit R-L is added
in series with the phase shift capacitor.
The dI/dt depends on the maximal voltage V
max
of the phase shift capacitor (700V on 240V mains appli-
cations), and on the inductance L:
v
L
The total switch turn on di/dt is the sum of the di/dt created by any RC noise suppressor discharge and
the dI/dt created by the motor capacitor discharge.
Since the maximal dI/dt capability at turn-on of the ACST8 is 100A/μs, the motor capacitor di/dt is assumed
to be less than 50A/μs; therefore, the inductance should be 14μH.
The resistor R limits the surge current through the ACST8 during the capacitor discharge according to the
specified curve I
TSM
= f (tp) as shown in figure 11 (to be issued), and 1.2
is low enough to limit the resistor
dissipation (usually less than 1 W).
Finally both the 14μH inductance and the 1.2
resistance provide a safety margin of two on the surge cur-
rent I
TSM
described in figure 11.
CONTROL
UNIT
COM
OUT
G
dt
----
----------
=
C
L
VAC
T1
ON
T2
R
700V
M
Fast capacitor discharge when
one ACST switch turns on (T2)
and the motor runs (T1 ON).
相關PDF資料 |
PDF描述 |
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| ACT-5231PC-133F22T | Circular Connector; MIL SPEC:MIL-DTL-38999 Series II; Body Material:Metal; Series:JT; No. of Contacts:22; Connector Shell Size:12; Connecting Termination:Crimp; Circular Shell Style:Box Mount Receptacle; Body Style:Straight RoHS Compliant: No |
| ACT-5231PC-150F22C | Circular Connector; No. of Contacts:22; Series:JTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle |
| ACT-5231PC-150F22I | Circular Connector; No. of Contacts:22; Series:JTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle |
| ACT-5231PC-150F22M | Circular Connector; No. of Contacts:22; Series:JTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle |
| ACT-5231PC-150F22Q | Circular Connector; No. of Contacts:22; Series:JTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ACST8_09 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Overvoltage protected AC switch |
| ACST830-8FP | 功能描述:雙向可控硅 Overvoltage Triac Static dV/dt >2000 V RoHS:否 制造商:STMicroelectronics 開啟狀態(tài) RMS 電流 (It RMS):16 A 不重復通態(tài)電流:120 A 額定重復關閉狀態(tài)電壓 VDRM:600 V 關閉狀態(tài)漏泄電流（在 VDRM IDRM 下）:5 uA 開啟狀態(tài)電壓: 保持電流（Ih 最大值）:45 mA 柵觸發(fā)電壓 (Vgt):1.3 V 柵觸發(fā)電流 (Igt):1.75 mA 最大工作溫度: 安裝風格:Through Hole 封裝 / 箱體:TO-220AB |
| ACST830-8FPTR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Overvoltage protected AC switch |
| ACST830-8G | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Overvoltage protected AC switch |
| ACST830-8GTR | 功能描述:雙向可控硅 AC POWER SWITCH 8 AMP LOAD <10 mA RoHS:否 制造商:STMicroelectronics 開啟狀態(tài) RMS 電流 (It RMS):16 A 不重復通態(tài)電流:120 A 額定重復關閉狀態(tài)電壓 VDRM:600 V 關閉狀態(tài)漏泄電流（在 VDRM IDRM 下）:5 uA 開啟狀態(tài)電壓: 保持電流（Ih 最大值）:45 mA 柵觸發(fā)電壓 (Vgt):1.3 V 柵觸發(fā)電流 (Igt):1.75 mA 最大工作溫度: 安裝風格:Through Hole 封裝 / 箱體:TO-220AB |
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