AVS12

AVS12 AUTOMATIC VOLTAGE SWITCH (SMPS < 500W) CONTROLLER s s s s s 50/60Hz FULL COMPATIBILITY INTEGRATED VOLTAGE REGULATOR TRIGGERING PULSE TRAIN OF THE TRIAC PARASITIC FILTER LOW POWER CONSUMPTION TRIAC s s s s HIGH EFFICIENCY AND SAFETY SWITCHING UNINSULATED PACKAGE : AVS12CB VDRM = ± 600V IT(RMS): 12A A1 A2 G P DIP8 (Plastic) B TO 220AB (Plastic) 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 consumption and high security triggering of the triac. When connected to VSS, the mode input 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 comes back to 220V. When connected to VDD, the mode input 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. PIN CONNECTION V Osc / In Osc / Out V 1 2 3 4 8 7 6 5 V Mode N.C. V March 1995 1/8 AVS12 BLOCK DIAGRAM AVS1ACP08 MODE 7 Reset MR Peak Voltage Dectector AVS12CB VSS 1 VDD 4 VM 8 Supply Parasitic Filter Mains mode CP Controller Q A2 2 Zero Crossing Detector OSC/IN 2 OSC/OUT 3 Oscillator Triggering Q CP Time Controller S 5 VG G 3 1 4 V DD A1 ABSOLUTE MAXIMUM RATINGS ...