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ACST4108B

Description
Overvoltage protected AC switch
File Size136KB,13 Pages
ManufacturerSTMicroelectronics
Websitehttp://www.st.com/
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ACST4108B 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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