Single control signal generation in power stage controller
AssigneeRenesas Electronics Corporation
InventorsBenoit Labbe, Adam Matthew Bumgarner, Vinod Aravindakshan Lalithambika, Allan Richard Warrington
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Abstract
A controller for controlling a power stage having one or more phases is presented. The controller includes a reference circuit that generates a reference signal; a ramp generator generating a feedback ramp signal based on a feedback signal of the power stage; and a modulator generating a control signal for controlling at least one phase of the power stage. The control signal may include a series of pulses in which each pulse is associated with a corresponding phase of the power stage.
Claims19
A controller for controlling a power stage having one or more phases, the controller comprising:
- a reference circuit adapted to generate a reference signal;
- a ramp generator adapted to generate a feedback ramp signal based on a feedback signal of the power stage;
- and
- a modulator adapted to generate a control signal for controlling at least one phase of the power stage, wherein the modulator comprises:
- a comparator adapted to compare the feedback ramp signal with the reference signal to obtain a modulation signal;
- a sampling circuit configured to sample the modulation signal and to generate a digital modulation signal;
- a logic circuit configured to generate the control signal based on the digital modulation signal;
- and
- an oscillator coupled to the sampling circuit and the logic circuit.
A method of controlling a power stage having one or more phases, the method comprising:
- generating a reference signal;
- generating a feedback ramp signal based on a feedback signal of the power stage;
- comparing the feedback ramp signal with the reference signal to obtain a modulation signal;
- sampling, according to a clock signal provided by an oscillator, the modulation signal to generate a digital modulation signal;
- and
- generating, based on the digital modulation signal and according to the clock signal provided by the oscillator, a control signal for controlling at least one phase of the power stage.
Dependencies are inferred from the claim text.