Application of NCP1205 in Interleaving Paralleled Backward Circuit

NCP1205 can work at BCM under any laod/circuit condition and realize the switch-on of switch at quasi resonance(QR) valley.It introduces the operational principle and main characteristics of NCP1205.NCP1205 is applied to the interleaving paralleled backward circuit to reduce the switch tube power loss and output voltage ripple,to enhense the circuit efficiency.