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AVS12 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. AVS12
Description  AUTOMATIC VOLTAGE SWITCH SMPS < 500W
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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AVS12 Datasheet(HTML) 1 Page - STMicroelectronics

   
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AVS12
AUTOMATIC VOLTAGE SWITCH (SMPS < 500W)
CONTROLLER
s
50/60Hz FULL COMPATIBILITY
s
INTEGRATED VOLTAGE REGULATOR
s
TRIGGERING PULSE TRAIN OF THE TRIAC
s
PARASITIC FILTER
s
LOW POWER CONSUMPTION
TRIAC
s
HIGH EFFICIENCY AND SAFETY SWITCHING
s
UNINSULATED PACKAGE : AVS12CB
s
VDRM = ± 600V
s
IT(RMS): 12A
March 1995
B
TO 220AB
(Plastic)
P
DIP8
(Plast ic)
1
2
3
4
V
Mode
V
8
7
6
5
V
V
Osc / In
Osc / Out
N.C.
A1
A2
G
DESCRIPTION
The AVS12 kit is an automatic mains selector
(110/220V AC) to be used in SMPS < 500 W. It
is composed of 2 devices :
• The Controller is optimized for low consump-
tion and high security triggering of the triac.
When connected to VSS, the mode input acti-
vates an additional option. If the main power
drops from 220V to 110V, the triac control re-
mains locked to the 220V mode and avoids
any high voltage spike when the voltage
comes back to 220V.
When connected to VDD, the mode input de-
sactivates this option.
• The TRIAC is specially designed for this appli-
cation. An optimization between sensitivity and
dynamic parameters of the triac gate highly
reduces the losses of supply resistor and al-
lows excellent immunity against disturbances.
PIN CONNECTION
1/8


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