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US 11,606,020 B2Granted
Power converting system and DC-to-DC converting device
AssigneeTop Victory Investments Ltd.
InventorLi-Wei Lin
Life of this patent
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Abstract
A system includes a first device and N number of second devices. The first device generates, based on a DC input signal, a first DC output voltage and a first enabling signal, enabled by which, a first one of the second devices generates a second DC output voltage and a second enabling signal based on the DC input signal. In a similar manner, an ith one of the second devices is enabled by an (i−1)th one of the second devices to generate an (i+1)th DC output voltage and an (i+1)th enabling signal based on the DC input signal. A starting time point of a logic-high level portion of each enabling signal is later than a peak time point corresponding to a peak voltage of the corresponding DC output voltage.
Claims14
A power converting system, comprising:
- a first direct current to direct current (DC-to-DC) converting device configured to receive a DC input signal, and to generate a first DC output voltage and a first enabling signal based on the DC input signal, a starting time point of a logic-high level portion of the first enabling signal, where the first enabling signal is at a logic-high level, being later than a peak time point that corresponds to a peak voltage of the first DC output voltage;
- and
- N number of second DC-to-DC converting devices each configured to receive the DC input signal, where N is a positive integer,
- wherein a first one of said N number of second DC-to-DC converting devices is electrically connected to said first DC-to-DC converting device for receiving the first enabling signal, and is configured to be enabled by the first enabling signal to generate a second DC output voltage and a second enabling signal at least based on the DC input signal, a starting time point of a logic-high level portion of the second enabling signal, where the second enabling signal is at a logic-high level, being later than a peak time point that corresponds to a peak voltage of the second DC output voltage,
- wherein an ith one of said N number of second DC-to-DC converting devices, where i is a positive integer ranging from two to N, is electrically connected to an (i−1)th one of said N number of second DC-to-DC converting devices for receiving an ith enabling signal generated by said (i−1)th one of said N number of second DC-to-DC converting devices, and is configured to be enabled by the ith enabling signal to generate an (i+1)th DC output voltage and an (i+1) enabling signal at least based on the DC input signal, a starting time point of a logic-high level portion of the (i+1)th enabling signal, where the (i+1)th enabling signal is at a logic-high level, being later than a peak time point that corresponds to a peak voltage of the (i+1)th DC output voltage.
2 more elements
A direct current to direct current (DC-to-DC) converting device, comprising:
- a power convertor configured to receive a DC input signal, to generate a control signal at least based on the DC input signal, to generate a pulse-width modulation (PWM) signal at least based on the control signal and a feedback voltage, and to generate a DC output voltage based on the DC input signal and the PWM signal;
- a voltage-dividing unit electrically connected to said power convertor for receiving the DC output voltage, and configured to divide the DC output voltage so as to generate the feedback voltage, and to output the feedback voltage to said power convertor;
- a current-detecting unit configured to detect the DC input signal so as to generate a detection current;
- a switching unit having a first output end and a second output end, electrically connected to said current-detecting unit and said power convertor for receiving the detection current and the PWM signal respectively therefrom, and configured to be controlled, based on the PWM signal, to output the detection current via said first output end and said second output end, alternately;
- a peak-values-comparing unit electrically connected to said first output end and said second output end of said switching unit for receiving the detection current via said first output end and said second output end, alternately, electrically connected to said power convertor for receiving the PWM signal, and configured to generate a first peak-value-holding signal based on a part of the detection current received via said first output end of said switching unit, to generate a second peak-value-holding signal based on another part of the detection current received via said second output end of said switching unit, and to compare the first peak-value-holding signal and the second peak-value-holding signal based on the PWM signal so as to generate a comparison signal;
- and
- a latching unit electrically connected to said power convertor and said peak-values-comparing unit for receiving the control signal and the comparison signal respectively therefrom, and configured to generate an enabling signal based on the control signal and the comparison signal,
- wherein a starting time point of a logic-high level portion of the enabling signal, where the enabling signal is at a logic-high level, is later than a peak time point corresponding to a peak voltage of the DC output voltage,
- wherein the starting time point of the logic-high level portion of the enabling signal matches a time point at which the comparison signal changes from a logic-low level to a logic-high level, and
- wherein an ending time point of the logic-high level portion of the enabling signal, where the enabling signal changes from the logic-high level to a logic-low level, matches a time point of transition of the control signal from a logic-high level to a logic-low level.
7 more elements
Dependencies are inferred from the claim text.