Large power multi-path outputting electric power structure with high efficiency and control method thereof

The invention provides a large-power multi-passage output power structure with high efficiency and a control method thereof, wherein, the power structure is more particularly a switch-mode power which comprises a first output converter used for generating a first high-power voltage output and a second output converter used for generating a second high-power voltage output and coupled with the first high-power voltage so as to generate a coupling output, wherein, when one transient power of the coupling output is less than or equal to a rated output power of the first high-power voltage output, the first output converter runs and the second output converter is not in use; and when the transient power is more than the rated output power, the second output converter also runs. The structure and the method effectively improve the light-load efficiency of the power supply, solve the heat dissipation problem of the transformer and the cross regulation ratio problem of the multiplexed outputconverter, realize relatively high efficiency from full load to light load, and have the advantages of simple design and low cost simultaneously.