Patent ID: 9570984
Date: 2017-02-14
CPC Classifications: H02J,H02M

Claim:
1. A circuit for a paralleled power supply module to implement automatic current-sharing in proportion, comprising: at least two power supply modules, and an output current feedback loop and an output voltage adjusting loop corresponding to each power supply module, wherein, the output current feedback loop comprises: an output current sample amplifying unit and a current-sharing controller unit; the output current feedback loop is configured to: feed back an output current of the power supply module to the output voltage adjusting loop corresponding to each power supply module; the output current sample amplifying unit is configured to: collect the output current of the power supply module, and amplify the collected output current into a voltage signal wherein a proportion of each amplified voltage signal is inversed to a preset output proportion of each power supply module; the current-sharing controller unit is configured to: adjust an output voltage of each power supply module; wherein, an inverted input end of the current-sharing controller unit is connected to an output signal of the output current sample amplifying unit; a non-inverted input end is connected to a current-sharing bus through a resistance; and an output end is connected to the output voltage adjusting loop; and the output voltage adjusting loop is configured to compare the output voltage of the current-sharing controller unit with a reference voltage, and control the output voltage of the power supply module to adjust the output current.