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US 11,601,057 B2Granted
Switched-mode power supply having a plurality of output stages
AssigneeABL IP Holding LLC
InventorsThomas Pollischansky, Markus Heckmann
Life of this patent
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Abstract
In various embodiments, a switched-mode power supply is provided. The switched-mode power supply includes at least two output stages. Each output stage has a converter. A frequency of at least one of the output stages is modulated by way of a modulation unit configured to provide a modulation signal that is combined with a switching signal for driving a switching element of the converter of the at least one output stage.
Claims15
A switched-mode power supply, comprising:
- a first output stage and a second output stage;
- wherein the first output stage comprises a first converter comprising a first switching element with either a first base terminal or a first gate terminal, and the second output stage comprises a second converter comprising a second switching element with a second base terminal or a second gate terminal;
- wherein the first output stage comprises a first modulation unit and the second output stage comprises a second modulation unit;
- wherein the first modulation unit is configured to modulate a frequency of the first output stage by providing a first modulation signal that is combined with a switching signal to the first base terminal or the first gate terminal for driving the first switching element;
- wherein the second modulation unit is configured to modulate a frequency of the second output stage by providing a second modulation signal that is combined with a switching signal to the second base terminal or the second gate terminal for driving the second switching element;
- wherein the first modulation signal and the second modulation signal are configured to cause the first output stage to operate asynchronously to the second output stage, wherein the second modulation signal is independent of the first modulation signal;
- wherein a phase angle of the first modulation signal is different from a phase angle of the second modulation signal;
- and
- wherein each of the converters has at least one inductor, the at least one inductor of each of the two output stages being coupled to one another.
6 more elements
A lighting unit, comprising:
- at least one switched-mode power supply, comprising:
- a first output stage and a second output stage;
- wherein the first output stage comprises a first converter comprising a first switching element with either a first base terminal or a first gate terminal, and the second output stage comprises a second converter comprising a second switching element with a second base terminal or a second gate terminal;
- wherein the first output stage comprises a first modulation unit and the second output stage comprises a second modulation unit;
- wherein the first modulation unit is configured to modulate a frequency of the first output stage by providing a first modulation signal that is combined with a switching signal to the first base terminal or the first gate terminal for driving the first switching element;
- wherein the second modulation unit is configured to modulate a frequency of the second output stage by providing a second modulation signal that is combined with a switching signal to the second base terminal or the second gate terminal for driving the second switching element;
- wherein the first modulation signal and the second modulation signal are configured to cause the first output stage to operate asynchronously to the second output stage, wherein the second modulation signal is independent of the first modulation signal;
- wherein a difference between the frequency of the first output stage and the frequency of the second output stage is not equal to zero, and
- wherein a phase angle of the first modulation signal is different from a phase angle of the second modulation signal.
6 more elements
A switched-mode power supply, comprising:
- a first output stage and a second output stage;
- wherein the first output stage has a first converter operating according to a first frequency and the second output stage has a second converter operating according to a second frequency;
- wherein a difference between the first frequency and the second frequency is not equal to zero because the first and second frequencies of the first and second output stages are modulated by way of a modulation unit configured to provide a first modulation signal to the first converter that is combined with a switching signal for driving a first switching element of the first converter and a second modulation signal to the second converter that is combined with a switching signal for driving a second switching element of the second converter, and
- wherein the second modulation signal is independent of the first modulation signal, and wherein the first modulation signal and the second modulation signal are configured to cause the first and second output stages to operate asynchronously.
1 more element
A switched-mode power supply, comprising:
- at least two output stages;
- at least two loads, each of the at least two loads driven by one of the at least two output stages;
- wherein each output stage has a converter;
- wherein a frequency of a first output stage of the at least two output stages is modulated by way of a modulation unit configured to provide a first modulation signal that is combined with a switching signal for driving a first switching element of a first converter of the first output stage,
- wherein a frequency of a second output stage of the at least two output stages is modulated by way of the modulation unit configured to provide a second modulation signal that is combined with a switching signal for driving a second switching element of a second converter of the second output stage,
- wherein the second modulation signal is independent of the first modulation signal,
- wherein the modulation signal is configured to cause the at least one of the output stages to operate asynchronously to the other of the output stages, and
- wherein each of the converters has at least one inductor, the at least one inductor of each of the two output stages being coupled to one another.
5 more elements
Dependencies are inferred from the claim text.