Interleaving is applied to the parallel circuit of the switching power supply

The present application discloses a method applied to the parallel switching interleaved power control circuit, which is the output voltage of the interleaved switching power supply and sampling operation to obtain a compensated feedback signal; characterized by a first path when the voltage converter circuit inductor current magnitude a first voltage signal is less than the compensation signal, generating a first signal having a high level of the opening, the first opening switch; determining a first switching cycle of the power switch turn-on signal according to the two adjacent first rising edge timing ; Further, in the present switching period after the opening of the first rising edge of signal arrival, after half the switching period, generating a second turn-on signal, and thus turn opening according to the second control signal the second power switch, so that the two power switches the opening time interval of a half switching period, i.e. the two power switches to achieve the cross conduction. Meanwhile, the application control process switches from the operating frequency affects power, improve the dynamic characteristics of the switching power supply, stability and efficiency.