Patent ID: 7795755
Filing Date: 2010-09-14
Classification: H02J

Abstract:
1. A circuit for improving current balance accuracy of a power converter system having a plurality of converter modules connected to a share bus, the circuit comprising: a first component, the first component forming a first resistor; a current mirror connected to the first component and the share bus, and mirroring a phase current to provide a first mirror current to the first component to derive a first signal representative of the phase current and a second mirror current to the share bus; a second component connected to the share bus and extracting an average current from the share bus to derive a second signal representative of the average current, the second component forming a second resistor; and a comparator connected to the first and second components, and comparing the first signal with the second signal to produce an output signal for modulation of the phase current; wherein the first and second resistors have substantially the same resistance.