Patent ID: 8378650

Claim:
A way out of balance (WOB) rebalancer for use with a two-phase DC-DC converter that includes a pulse width modulator adapted to output a first pulse width modulated signal (PWM 1 out) and a second pulse width modulated signal (PWM 2 out) that is substantially 180 degrees out of phase from the first pulse width modulated signal (PWM 1 out), a first channel including a first driver MOSFET stage (DrMOS 1 ) having an input and an output, and a first inductor (L 1 ) having a terminal that is driven in dependence on the output of the first driver MOSFET stage (DrMOS 1 ), a second channel including a second driver MOSFET stage (DrMOS 2 ) having an input and an output, and a second inductor (L 2 ) having a terminal that is driven in dependence on the output of the second driver MOSFET stage (DrMOS 2 ), wherein the WOB rebalancer comprises: a WOB detector adapted to detect WOB conditions within the two-phase DC-DC converter; and a pulse path director adapted to adjust a balance between a current through the first channel and a current through the second channel in dependence on feedback from the WOB detector; wherein the pulse path director is adapted to provide one or more pulses of the first pulse width modulated signal (PWM 1 out) to the first channel, and provide one or more pulses of the second pulse width modulated signal (PWM 2 out) to the second channel, when the WOB detector does not detect a WOB condition; and selectively provide one or more pulses of the first pulse width modulated signal (PWM 1 out) to the second channel, or selectively provide one or more pulses of the second pulse width modulated signal (PWM 2 out) to the first channel, in response to the WOB detector detecting a WOB condition, to thereby adjust the balance between the current through the first channel and the current through the second channel in dependence on feedback from the WOB detector.