Patent ID: 7333354

Claim:
An improved switch for power factor correction circuits, comprising at least one rectifier and a power factor correction circuit on a power conversion circuit which has two capacitors, the power factor correction circuit having a first inductor and a second inductor and being electrically connected to a switch, the switch having a first position and a second position to determine the first inductor and the second inductor in a serial coupling condition and a parallel coupling condition and determine the power conversion circuit in a first duty condition and a second duty condition; wherein the first inductor and the second inductor are bridged by a selection line which has a first switch terminal and a second switch terminal, the first inductor being connected to a connection line which has a first terminal connecting to the second inductor and a second terminal bridging the two capacitors such that when the switch is located on the first position the selection line is connected to the first switch terminal and the connection line is closed and connected to determine the first inductor and the second inductor in the parallel coupling condition and the power conversion circuit in the first duty condition; and when the switch is located on the second position the selection line is connected to the second switch terminal and the connection line is open and not connected to determine the first inductor and the second inductor in the serial coupling condition and the power conversion circuit in the second duty condition, wherein the switch has six terminals.