Totem-pole power factor corrector with zero-voltage switching
A Totem-pole power factor corrector receives an input power source and convert the input power source into an output power source. The Totem-pole power factor corrector includes an input inductor, a fast-switching switch leg, a slow-switching switch leg, a resonant tank, and an output capacitor. The fast-switching switch leg includes a fast-switching upper switch and a fast-switching lower switch, and the fast-switching upper switch and the fast-switching lower switch are commonly coupled at a first middle node. The slow-switching switch leg is coupled in parallel to the fast-switching switch leg, and the slow-switching switch leg includes a slow-switching upper and a slow-switching lower switch. The resonant tank includes a resonant inductor and at least one resonant capacitor. A first end of the resonant inductor is coupled to the first middle node, and a second end of the resonant inductor is coupled to the at least one capacitor.
1. A Totem-Pole power factor corrector with zero-voltage switching, configured to receive an input power source and convert the input power source into an output power source, the Totem-Pole power factor corrector comprising:
an input inductor, a first end of the input inductor configured to receive the input power source,
a fast-switching switch leg, comprising a fast-switching upper switch and a fast-switching lower switch, and the fast-switching upper switch and the fast-switching lower switch commonly coupled at a first middle node,
a slow-switching switch leg, coupled in parallel to the fast-switching switch leg, and the slow-switching switch leg comprising a slow-switching upper switch and a slow-switching lower switch,
a resonant tank, comprising a resonant inductor and at least one resonant capacitor; a first end of the resonant inductor coupled to the first middle node, and a second end of the resonant inductor coupled to the at least one resonant capacitor, and
an output capacitor, coupled in parallel to the fast-switching switch leg, and configured to output the output power source.
2. The Totem-Pole power factor corrector as claimed in claim 1 , wherein the number of the at least one resonant capacitor is one; a first end of the resonant capacitor is coupled to the second end of the resonant inductor, and a second end of the resonant capacitor is coupled to the fast-switching upper switch and the slow-switching upper switch.
3. The Totem-Pole power factor corrector as claimed in claim 1 , wherein the number of the at least one resonant capacitor is one; a first end of the resonant capacitor is coupled to the second end of the resonant inductor, and a second end of the resonant capacitor is coupled to the fast-switching lower switch and the slow-switching lower switch.
4. The Totem-Pole power factor corrector as claimed in claim 1 , wherein the number of the at least one resonant capacitor is two, which are a first resonant capacitor and a second resonant capacitor; a first end of the first resonant capacitor and a first end of the second resonant capacitor are coupled to the second end of the resonant inductor; a second end of the first resonant capacitor is coupled to the fast-switching lower switch and the slow-switching lower switch; a second end of the second resonant capacitor is coupled to the fast-switching upper switch and the slow-switching upper switch.
5. The Totem-Pole power factor corrector as claimed in claim 1 , wherein a first end of the fast-switching upper switch and a first end of the fast-switching lower switch are commonly coupled to the first middle node; a first end of the slow-switching upper switch and a first end of the slow-switching lower switch are commonly coupled to the input power source; a second end of the fast-switching upper switch is coupled to a first end of the slow-switching upper switch; a second end of the fast-switching lower switch is coupled to a second end of the slow-switching lower switch.
6. The Totem-Pole power factor corrector as claimed in claim 1 , wherein the input inductor and the resonant inductor form an integrated coupling structure.
7. The Totem-Pole power factor corrector as claimed in claim 1 , wherein the Totem-Pole power factor corrector operates in a N-phase structure;
the N-phase Totem-Pole power factor corrector comprises:
N sets of the input inductors, N sets of the fast-switching switch legs, and N sets of the resonant tanks, and
one set of the slow-switching switch leg and one set of the output capacitor.
8. The Totem-Pole power factor corrector as claimed in claim 7 , wherein the input inductor in each phase is correspondingly coupled with the resonant inductor of the resonant tank.
9. The Totem-Pole power factor corrector as claimed in claim 7 , wherein the two resonant inductors between two phases are cross-coupled.