FIG. 1 is an isometric view of an ornamental design of a power supply showing our new design.
FIG. 2 is a front elevation plan view thereof.
FIG. 3 is a rear elevation plan view thereof.
FIG. 4 is a left side elevation plan view thereof.
FIG. 5 is a right side elevation plan view thereof.
FIG. 6 is a top elevation plan view thereof; and,
FIG. 7 is a bottom elevation plan view thereof.
The broken lines shown in FIGS. 1-7 are included for the purpose of illustrating environmental elements only and form no part of the claimed design.