DC-DC converter with current loop gain
AssigneeTexas Instruments Incorporated
InventorsJian Liang, Weicheng Zhang, Linghan Xie
Life of this patent
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Abstract
A converter system includes a first switch, a first sensing unit configured to generate a first sensed signal proportional to a current through the first switch, a second sensing unit (118) configured to generate a second sensed signal based on a difference between a reference voltage and a feedback voltage, a DC compensation unit configured to generate a slope peak DC signal relative to a slope peak of a slope compensation signal, and a signal combination unit configured to generate a control signal based on the first and second sensed signals, the slope compensation signal and the slope peak DC signal to switch off the first switch.
Claims19
A converter system, comprising:
- a switch;
- a first sensing unit coupled to the switch, the first sensing unit configured to generate a first sensed signal proportional to a current through the switch;
- a second sensing unit, configured to generate a second sensed signal based on a difference between a reference voltage and a feedback voltage;
- a DC compensation unit, configured to generate a slope peak DC signal relative to a slope peak of a slope compensation signal;
- and
- a signal combination unit coupled to the DC compensation unit and the first and second sensing units, the signal combination unit having a control output and configured to generate a control signal at the control output based on a comparison between:
- a first sum of the first sensed signal and the slope compensation signal;
- and a second sum of the second sensed signal and the slope peak DC signal;
- in which the switch is coupled to the control output and configured to switch off responsive to the control signal indicating the first sum is greater than the second sum.
A method of operating a converter system, comprising:
- switching on a switch;
- generating a first sensed signal proportional to a current through the switch;
- generating a second sensed signal based on a difference between a reference voltage and a feedback voltage;
- generating a slope peak DC signal relative to a slope peak of a slope compensation signal;
- generating a control signal based on a comparison between:
- a first sum of the first sensed signal and the slope compensation signal;
- and a second sum of the second sensed signal and the slope peak DC signal;
- and
- switching off the switch responsive to the control signal indicating the first sum is greater than the second sum.
Dependencies are inferred from the claim text.