Current balance circuit and multiphase DC-DC converter and current balance method thereof
The present invention discloses a current balance circuit for a multiphase DC-DC converter. The current balance circuit comprises a current error calculation circuit, for generating a plurality of current balance signals indicating imbalance levels of a plurality of inductor currents of a plurality of channels of the multiphase DC-DC converter according to a plurality of current sensing signals of the plurality of channels, a time shift circuit, for adjusting pulse widths of a plurality of clock signals according to the plurality of current balance signals, and a ramp generator, for deciding shift levels of a plurality of ramp signals according to the plurality of clock signals.
Anpec Electronics Corporation
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Ke-Horng Chih-Heng Yu-Huei Yi-Ping Yu-Ping Yueh-Lung
Chen Su Lee Su Huang Kuo