Abstract: The utility model discloses a high-power parallel switch power circuit capable of realizing adjustable current sharing, and relates to a switch power circuit. A power supply which is subjected to capacity expanding by a parallel module is complex in structure and high in cost when a highest current automatic current sharing method and a current-sharing controller are adopted to realize the current sharing. The high-power parallel switch power circuit is characterized in that a control circuit comprises a current sampling unit, a voltage sampling unit, a current-sharing bus unit connected with the current sampling unit, a current-sharing control voltage acquisition unit, an adjustable external reference voltage unit, an adjustable external current-limiting reference voltage unit, a voltage error amplifying unit, and a current error amplifying unit, wherein the voltage error amplifying unit comprises a first operational amplifier; and the first operational amplifier is respectively connected with the voltage sampling unit, the current-sharing bus unit, the adjustable external reference voltage unit and the current-sharing control voltage acquisition unit. The technical scheme realizes the highest current automatic current sharing through a pure hardware circuit without a controller, and simultaneously, achieves a practical circuit with adjustable output voltage; and the high-power parallel switch power circuit is simple in structure and low in cost.
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