MULTI-PHASE BUCK DC CONVERTER

摘要

A multi-phrase buck DC converter comprise a plurality of storage inductors, a plurality of low-side switches, a first input capacitor, a second input capacitor, a plurality of high-side switches and at least one clamping capacitor. The storage inductors are used to drive a load. The low-side switches are connected to the storage inductors; respectively. The second input capacitor is connected to the first input capacitor in series. The contact of the first input capacitor and the second input capacitor is connected to one storage inductor. A part of the high-side switches are connected in series. One end of each clamping capacitor is connected to any two high-side switches connected in series and the other end is connected to the storage inductors.

主权项

1. An N-phase buck DC converter for driving a load, where N=2n and N is an even number greater than 4, the N-phrase buck DC converter comprising:
N storage inductors connected to the load, wherein the N storage inductors are divided into a first part storage inductor and a second part storage inductor, the first part storage inductor includes a first storage inductors to a (2n−1)th storage inductor with a fixed interval, the second part storage inductor includes a second storage inductors to a 2nth storage inductors with the fixed interval; N low-side switches, wherein one side of the each low-side switch is connected to the N storage inductors, respectively; a first input capacitor; a second input capacitor connected to the first input capacitor in series, wherein a contact of the first input capacitor and the second input capacitor is connected to the second storage inductor of the N storage inductors; N high-side switches divided into a first part high-side switch and a second part high-side switch, wherein the first part high-side switch includes a first high-side switch to a (2n−1)th high-side switch with the fixed interval, the second part high-side switch includes a second high-side switch to a 2nth high-side switch with the fixed interval, the (2n−1)th high-side switch of the first part high-side switch is connected to the (2n−1)th the storage inductor of the N storage inductors; and N−2 clamping capacitors divided in to a first part clamping capacitor and a second part clamping capacitor, wherein the first part clamping capacitor includes a first clamping capacitor to a (2n−3)th clamping capacitor with the fixed interval, and one side of a kth clamping capacitor is connected to a kth high-side switch and a (k++2)th high-side switch, the other side of the kth clamping capacitor is connected to a kth storage inductor of the N storage inductors, wherein k is an odd number between 1 and (2n−3), the second part clamping capacitor includes a second clamping capacitor to a (2n−2)th clamping capacitor with the fixed interval, and one side of a jth clamping capacitor is connected to a jth high-side switch and a (j+2)th high-side switch, the other side of the jth clamping capacitor is connected to a (j+2)th storage inductor of the N storage inductors, wherein j is an even number between 2 and (2n−2).