The AVS08 kit is an automatic mains selector
(110/220V AC) to be used in SMPS < 200 W. It is
composed of 2 devices :
■
The Controller is optimized for low
consumption and high security triggering of the
triac. When connected to V
, the mode input
SS
activates an additional option. If the main
power drops from 220V to 110V, the triac
control remains locked to the 220V mode and
avoids any high voltage spike when the voltage
is restored to 220V.
When connected to V
, the mode input
DD
desactivates this option.
■
The TRIAC is specially designed for this
application. An optimization between sensitivity
and dynamic parameters of the triac gate highly
reduces the losses of supply resistor and allows
excellent immunity against disturbances.
A1
AVS1BCP08
DIP-8
AVS08CB
TO-220AB
PIN CONNECTION
V
SS
Osc / In
Osc / OutN.C.
DD
1
2
3
4
8
7
6
5V
V
Mode
V
A2
G
M
G
January 2002 - Ed: 3C
1/7
AVS08
BLOCK DIAGRAM
OSC/IN
OSC/OUT
AVS1BCP08
Supply
PeakVoltage
Detector
Zero Crossing
Oscillator
Reset
Parasitic
Filter
Detector
CP
S
CP
MODE
Mains
mode
Controller
Triggering
Time
Controller
AVS08CB
AVS08CBI
Q
Q
ABSOLUTE MAXIMUM RATINGS
CONTROLLER AVS1BCP08
SymbolParameter
V
I
V
SS
I/VO
I/IO
Supply voltage-120.5V
I / O voltageVSS-0.50.5V
I / O current-40+40mA
(1) : This value gives a typical noise immunity on the zero-crossing detectionof 110mV x 1018/18 = 6.20V on the main supply
(2) : See following diagram
(3) : Voltage referred to V
(4) : Voltage referred to V
= 9V)
SS
ISS(pin 1)
connected)
F (pin 3)
(C = 100pF)
(pin 8) Vth (3)Peak voltage of detection high-threshold4.084.254.42V
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