Patent ID: 8901901

Claim:
A multiphase power converter comprising: a first phase circuit comprising a first input inductor having a first end and a second end, wherein the first end is connected to a power source, a first drive switch connected between the second end of the first input inductor and ground, and a first rectification component having an anode connected to the second end of the first input inductor and a cathode connected to an output of the power converter; a second phase circuit comprising a second input inductor having a first end and a second end, wherein the first end is connected to the power source, a second drive switch connected between the second end of the second input inductor and ground, and a second rectification component having an anode connected to the second end of the second input inductor and a cathode connected to the output of the power converter; and a controller comprising a voltage control loop operable to provide a default on-time as a function of a voltage at the output of the power converter, a first waveform generator operable to provide a first control signal to the first drive switch of the first phase circuit to control whether the first drive switch is on or off, and to provide a first reload pulse at a predetermined point in each period of the first control signal, wherein the first waveform generator provides the first control signal to the first drive switch based on the default on-time, a second waveform generator operable to provide a second control signal to the second drive switch of the second phase circuit to control whether the second drive switch is on or off, and to provide a second reload pulse at a predetermined point in each period of the second control signal, and a phase control circuit comprising a signed counter operable to measure a phase error time from receiving one reload pulse of the first and second reload pulses until receiving the other reload pulse of the first and second reload pulses, and an adder operable to add the phase error time to the default on-time to provide a second on-time for the second phase circuit, wherein the second waveform generator provides the second control signal to the second drive switch based on the second on-time.