Power supply device and data processing apparatus

The invention discloses a power supply device, and belongs to the field of data centers, in particular to the technical field of power supply. The data centers can be used for data transmission in application scenes such as cloud computing and cloud service. The power supply device comprises a direct current conversion module and an output module. The direct current conversion module is configured to adjust the output power of the direct current conversion module according to the power of an external load based on a preset strategy; the direct current conversion module comprises a plurality of conversion sub-modules; each conversion sub-module comprises an input end and an output end; each conversion sub-module is configured to convert an alternating current electric signal received at the input end into a direct current electric signal and output the direct current electric signal from the output end; and the output module is electrically connected with the direct current conversion module, and the output mo