Systems and methods are provided for a torch power system having a high power density. In one embodiment, a system is provided that includes a torch power unit having a compressor and power electronics that include one or more power converters, wherein the torch power unit has a power output density of at least 2 watts per cubic inch, 80 watts per pound, or a combination thereof. A power conversion assembly for a torch power unit is provided that includes a single circuit board, a torch power converter mounted on the single circuit board, and a non-torch power converter mounted on the single circuit board. An electrical torch system is also provided that includes a circuit board and a power converter coupled to the circuit board, wherein the power converter includes a planar transformer, a foil wound transformer, or a combination thereof.