AUTO SWITCHING POWER SUPPLY
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-16
Power supplies used in chargers are normally designed for 110 VAC or 220 VAC operation. They can be designed with either a different line transformer for 110 VAC or 220 VAC or a configuration with a split winding on the transformer with user selectable jumpers or a switch. The first approach requires the manufacturer to build and inventory two separate models which adds cost. The second requires the customer to either change jumpers or change the position of a switch. If this is done incorrectly by the user, damage will result to the unit.