Transient control scheme for multiphase power converters

A power converter system, comprising:

• a multiphase power converter comprising a plurality of converter phases, each converter phase comprising a switching transistor and an inductor coupled between an input power source and a load;
• and
• a controller configured to distribute an on-time signal to each converter phase during operation of the multiphase power converter, the controller comprising circuitry configured to enable an on-time signal phase overlap between non-subsequent phases of the multiphase power converter when a load current increase is detected during a transient state of the multiphase power converter, the on-time signal phase overlap being a simultaneous on-state of two or more switching transistors of the non-subsequent phases during a duration of time within the transient state,
• wherein the controller comprises a clock generator and a comparator circuit, the comparator circuit being configured to receive a sensed total inductor current of the plurality of converter phases and a compensator voltage from a compensator coupled to the load, the comparator circuit being configured to compare the compensator voltage and the sensed total inductor current to generate a comparator clock signal input for the clock generator.

A power converter system, comprising:

• a multiphase power converter comprising a plurality of converter phases, each converter phase comprising a switching transistor and an inductor coupled between an input power source and a load;
• and
• a controller configured to distribute an on-time signal to each converter phase during operation of the multiphase power converter, the controller comprising circuitry configured to enable an on-time signal phase overlap between non-subsequent phases of the multiphase power converter when a load current increase is detected during a transient state of the multiphase power converter, the on-time signal phase overlap being a simultaneous on-state of two or more switching transistors of the non-subsequent phases during a duration of time within the transient state,
• wherein the controller comprises a phase manager configured to receive a clock signal from a clock generator, the phase manager being configured to trigger a plurality of on-time signals for turning on the plurality of converter phases during the transient state based on the clock signal, the plurality of on-time signals being triggered successively in a non-subsequent sequence of the plurality of converter phases.