The invention provides
current sharing control circuit and control method of double-
current sharing buses of a parallel DC switch power supply. The
current sharing control circuit comprises N DC switch power supplies which operate in parallel connection, wherein N = 1, 2, and the like; all the DC switch power supplies are connected together through two different common current sharing buses, and each DC switch power supply comprises a DC power supply main circuit, a
central processing unit (CPU), a PWM generation circuit, an A / D conversion circuit, a
voltage detection circuit, a current detection circuit, a current sharing
signal generation circuit, a first current sharing
bus and a second current sharing
bus. The invention has very good redundancy rate and
interference resistance, is beneficial to enhancing the reliability and the safety of a power supply
system and load and can reduce the regulating frequency of each power supply, effectively prevent the output current from generating low-
frequency oscillation, enhance the work efficiency and the quality of the output
voltage of the integral power supply
system and better meet the requirements of the load.