Patent ID: 9270178
Filing Date: 2016-02-23
CPC Classification: H02M

Claim Text:
1. A digital controller used in a multi-phase switching converter, wherein the multi-phase switching converter comprises a plurality of switching circuits, the digital controller comprises: an analog digital converting circuit coupled to the plurality of switching circuits, wherein the analog digital converting circuit is configured to receive a plurality of current sensing signals representative of the output current of the plurality of switching circuits, and to generate a plurality of digital phase current signals based on the plurality of current sensing signals; a current balance modulating circuit coupled to the analog digital converting circuit to receive the plurality of digital phase current signals, wherein the current balance modulating circuit is configured to generate a plurality of on time signals based on the plurality of digital phase current signals, a current reference signal and a predetermined on time signal; and a logic circuit coupled to the current balance modulating circuit to receive the plurality of on time signals, wherein based on the plurality of on time signals, the logic circuit generates a plurality of control signals to control the plurality of switching circuits; wherein the current balance modulating circuit comprises: