Patent ID: 9431905
Filing Date: 2016-08-30
CPC Classification: G06F,H02M

Claim Text:
1. A multiphase buck converter comprising: a first buck converter branch comprising a first core section, a first power section having a first output node, a first coil having a first end connected to the first output node, the first power section being adapted to be controlled by the first core section for providing to the first coil a first coil current, the first core section and the first power section being integrated in a chip; a second buck converter branch comprising a second core section, a second power section having a second output node, a second coil having a first end connected to the second output node, the second power section being adapted to be controlled by the second core section for providing to the second coil a second coil current, the second core section and the second power section being integrated in said chip; a feedback loop adapted to balance said coil currents; wherein: the feedback loop comprises a control block that, in order to balance said coil currents, is adapted to compare a first average voltage at the first output node with a second average voltage at the second output node and control the first and second branch in order to make said first and second average voltages equal to each other; and the control block is integrated in said chip and has a first input directly connected to said first output node and a second input directly connected to said second output node, and wherein the control block is adapted to directly obtain said first and second average voltages from the instantaneous voltages of the first and second output nodes, wherein the control block is adapted, based on the result of said comparison, to provide a differential error signal comprising a first error signal and a second error signal.