Back to results
US 12,587,081 B2Granted
Average current mode control of digital voltage sources
AssigneeVermillion Power Technologies Inc.
InventorRaymond Kenneth Orr
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to average current mode control of digital voltage sources. A digital control signal is generated to control the voltage source. The digital control signal is based on output current of a voltage source and upper and lower signals. The upper and lower signals are based on respective positive and negative offsets and a difference between a reference signal and a feedback signal related to the output voltage.
Claims26
An apparatus comprising:
- a current sense element to determine an output current of a voltage source;
- a digital control signal generator coupled to the current sense element, to generate a digital control signal to control the voltage source, based on the output current and upper and lower signals, the upper and lower signals based on respective positive and negative offsets and a difference between a reference signal and a feedback signal related to the output voltage,
- wherein the upper signal comprises a first analog signal converted from a digital error signal that is based on the difference between the reference signal and the feedback signal and is shifted upward by the positive offset;
- wherein the lower signal comprises a second analog signal converted from the digital error signal that is based on the difference between the reference signal and the feedback signal and is shifted downward by the negative offset.
1 more element
An apparatus comprising:
- a current sense element to determine an output current of a voltage source;
- a digital control signal generator coupled to the current sense element, to generate a digital control signal to control the voltage source, based on the output current and upper and lower signals, the upper and lower signals based on respective positive and negative offsets and a difference between a reference signal and a feedback signal related to the output voltage;
- an offset signal generator to receive a digital error signal that is based on the difference between the reference signal and the feedback signal, and to shift the digital error signal upward by the positive offset and downward by the negative offset;
- a first digital to analog converter, coupled to the offset signal generator, to generate the upper signal by converting the upward shifted digital error signal to analog;
- a second digital to analog converter, coupled to the offset signal generator, to generate the lower signal by converting the downward shifted digital error signal to analog.
2 more elements
An apparatus comprising:
- a current sense element to determine an output current of a voltage source;
- a digital control signal generator coupled to the current sense element, to generate a digital control signal to control the voltage source, based on the output current and upper and lower signals, the upper and lower signals based on respective positive and negative offsets and a difference between a reference signal and a feedback signal related to the output voltage,
- wherein the digital control signal comprises a digital value,
- wherein the digital control signal generator is configured to generate the digital value by incrementing the digital value responsive to the upper signal being above a current sense signal from the current sense element that is indicative of the output current, and decrementing the digital value responsive to the lower signal being below the current sense signal.
1 more element
A method comprising:
- determining an output current of a voltage source;
- generating a digital control signal, to control the voltage source, based on the output current and upper and lower signals, the upper and lower signals based on respective positive and negative offsets and a difference between a reference signal and a feedback signal related to the output voltage;
- shifting upward by the positive offset, a digital error signal that is based on the difference between the reference signal and the feedback signal;
- generating the upper signal by converting the upward shifted digital error signal to analog;
- shifting downward by the negative offset, the digital error signal;
- generating the lower signal by converting the downward shifted digital error signal to analog.
3 more elements
A method comprising:
- determining an output current of a voltage source;
- generating a digital control signal, to control the voltage source, based on the output current and upper and lower signals, the upper and lower signals based on respective positive and negative offsets and a difference between a reference signal and a feedback signal related to the output voltage,
- wherein the digital control signal comprises a digital value,
- wherein generating the digital control signal comprises:
- incrementing the digital value responsive to the upper signal being above a current sense signal that is indicative of the output current;
- decrementing the digital value responsive to the lower signal being below the current sense signal.
3 more elements
Dependencies are inferred from the claim text.