Switching Power Supply

FIG. 1 is a front perspective view of a switching power supply, showing my new design; FIG. 2 is a rear perspective view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a top view thereof; FIG. 8 is a bottom view thereof; and, FIG. 9 is an enlarged detail view of area 9 in FIG. 3 . The evenly spaced broken lines depict portions of the switching power supply, which form no part of the claimed design. The dot-dash broken lines define the bounds of the enlarged views and form no part of the claimed design.