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ACST4_09

Description
Overvoltage protected AC switch
File Size136KB,13 Pages
ManufacturerSTMicroelectronics
Websitehttp://www.st.com/
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ACST4_09 Overview

Overvoltage protected AC switch

ACST4
Overvoltage protected AC switch
Features
Triac with overvoltage protection
Low I
GT
(<10 mA) or high immunity
(I
GT
<35 mA) version
High noise immunity: static dV/dt > 1000 V/µs
TO-220FPAB insulated package: 1500 V rms
OUT
G
COM
G
OUT
COM
Benefits
Enables equipment to meet IEC 61000-4-5
High off-state reliability with planar technology
Needs no external overvoltage protection
Reduces the power passive component count
High immunity against fast transients
described in IEC 61000-4-4 standards
DPAK
ACST410-8B
ACST435-8B
TO-220FPAB
ACST410-8FP
ACST435-8FP
Figure 1.
Functional diagram
OUT
Applications
AC mains static switching in appliance and
industrial control systems
Drive of medium power AC loads such as:
– Universal motor of washing machine drum
– Compressor for fridge or air conditioner
Table 1.
Symbol
I
T(RMS)
V
DRM
/V
RRM
G
COM
Device summary
Value
4
800
10
35
Unit
A
V
mA
mA
Description
The ACST4 series belongs to the ACS™/ACST
power switch family built with A.S.D.
®
(application
specific discrete) technology. This high
performance device is suited to home appliances
or industrial systems, and drives loads up to 4 A.
This ACST4 switch embeds a Triac structure and
a high voltage clamping device able to absorb the
inductive turn-off energy and withstand line
transients such as those described in the
IEC 61000-4-5 standards. The ACST410 needs
only a low gate current to be activated (I
GT
< 10
mA) and still shows a high noise immunity
complying with IEC standards such as
IEC 61000-4-4 (fast transient burst test).
I
GT
(ACST410)
I
GT
(ACST435)
TM: ACS is a trademark of STMicroelectronics.
®: A.S.D. is a registered trademark of
STMicroelectronics
December 2009
Doc ID 8766 Rev 5
1/13
www.st.com
13

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Description Overvoltage protected AC switch Overvoltage protected AC switch Overvoltage protected AC switch Overvoltage protected AC switch Overvoltage protected AC switch Overvoltage protected AC switch Overvoltage protected AC switch Overvoltage protected AC switch Overvoltage protected AC switch
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