US 11,990,761 B2
Power supply system with current sharing and method of current sharing the same
Chien-Li Tsai, Taoyuan (TW); Chih-Fan Lin, Taoyuan (TW); and Chih-Hsien Hsieh, Taoyuan (TW)
Assigned to FSP TECHNOLOGY INC., Taoyuan (TW)
Filed by FSP TECHNOLOGY INC., Taoyuan (TW)
Filed on Nov. 10, 2022, as Appl. No. 17/984,516.
Claims priority of application No. 111114900 (TW), filed on Apr. 19, 2022.
Prior Publication US 2023/0336001 A1, Oct. 19, 2023
Int. Cl. H02J 3/46 (2006.01); H02J 3/38 (2006.01); H02M 7/12 (2006.01)
CPC H02J 3/46 (2013.01) [H02J 3/381 (2013.01); H02M 7/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A power supply system with current sharing, comprising:
a current sharing bus,
a plurality of power supply units, connected to each other through the current sharing bus; each power supply unit configured to provide a current sharing signal value corresponding to a power supply ratio to the current sharing bus, and provide an output current to a load, and
a plurality of controllers, respectively coupled to the power supply units; each controller configured to receive current sharing signal values provided from other power supply units and current signal values corresponding to the output currents, and compare a reference current sharing signal value of the current sharing signal values with the current signal values,
wherein when the controller determines that the current signal value is less than the reference current sharing signal value, the controller increases an output voltage of the power supply unit to increase the output current; when the controller determines that the current signal value is greater than the reference current sharing signal value, the controller decreases the output voltage to decrease the output current so that the output currents of the power supply units are shared to supply power to the load.