Digital duty cycle controller for a switching mode power supply

A digital duty cycle controller of a switching mode power supply, comprising:

• a power management unit of a high-speed processing unit configured to:
• calculate a base duty cycle wherein at least one of an output voltage of the high-speed processing unit, an output current of the high-speed processing unit, an input voltage of the high-speed processing unit, and a set of parameters of the switching mode power supply coupled to the high-speed processing unit is used as a variable in such calculations,
• calculate a dynamic offset duty cycle by applying a transfer function to a sampled feedback voltage signal, and
• add the base duty cycle to the dynamic offset duty cycle to obtain a duty cycle of the switching mode power supply;
• and
• a pulse-width modulator coupled between the switching mode power supply and the high-speed processing unit to modulate the duty cycle of the switching mode power supply.

A system to digitally control a duty cycle of a switching mode power supply, comprising:

• a switching mode power supply configured to deliver at least one of a steady-state output voltage and a steady-state output current;
• a power management unit of a high-speed processing unit configured to:
• calculate a base duty cycle wherein at least one of an output voltage of the high-speed processing unit, an output current of the high-speed processing unit, an input voltage of the high-speed processing unit, and a set of parameters of the switching mode power supply coupled to the high-speed processing unit is used as a variable in such calculations,
• calculate a dynamic offset duty cycle by applying a transfer function to a sampled feedback voltage signal, and
• add the base duty cycle to the dynamic offset duty cycle to obtain a duty cycle of the switching mode power supply;
• a voltage sensor to sense a plurality of analog feedback voltages of the high-speed processing unit;
• an analog to digital converter to convert the plurality of analog feedback voltages to a plurality of digital voltage signals, and wherein the power management unit is configured to continuously sample the plurality of digital voltage signals to obtain the sampled feedback voltage signal;
• and
• a pulse-width modulator coupled between the switching mode power supply and the high-speed processing unit to modulate the duty cycle of the switching mode power supply, and wherein the plurality of analog feedback voltages are a plurality of on-die feedback voltages of the high-speed processing unit and the voltage sensor is embedded in the high-speed processing unit and senses the plurality of on-die feedback voltages of the high-speed processing unit.