Switching regulated power supply using 110V (doubling voltage)/220V AC voltage input

Published:2011/11/13 21:33:00 Author:May | Keyword: Switching regulated power supply, 110V (doubling voltage)/220V AC voltage input | From:SeekIC

This power supply circuit is shown in the diagram. Its input AC voltage is 110V or 220V. When 110V AC voltage power supply changesin the range of 85~132V or 220V AC voltage power supply changes at the range of 170~265V, Sv=±1％. When the changing range of load current is 10%~100%, Si=5%, output ripple voltage is ±50mV. S in the circuit is 110V/220V AC voltage option switch. It can use cable jumper on printed plate to replace switch. When S is closed, it chooses 110V AC voltage as input, at this time, voltage doubling rectifying circuit consists of rectifying bridge BR and resistor capacitor components R1, C1, R2 and C2. When S is cut, it chooses 220V AC voltage as input. It added resistor R4 in output circuit in order to improve the voltage stability when it is atlight load. The smallest load current set by it is 36mA.



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