Controller device for resonant mode power converter circuit
AssigneeInfineon Technologies Austria AG
InventorsCheow Guan Lim, Nitin Agarwal, Jian-Wei Liu
Life of this patent
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Abstract
In some examples, a controller device for a resonant mode power converter circuit comprises a feed-forward pin configured to receive an input voltage signal of the resonant mode power converter circuit, a feedback pin configured to receive an output voltage signal of the resonant mode power converter circuit, processing circuitry configured to determine a switching frequency based on the input voltage signal and the output voltage signal, a first control pin configured to deliver a first control signal to the first switch at the switching frequency, and a second control pin configured to deliver a second control signal the second switch at the switching frequency.
Claims22
A controller device for a resonant mode power converter circuit comprising a first switch and a second switch, the controller device comprising:
- a feed-forward pin configured to receive an input voltage signal of the resonant mode power converter circuit;
- a feedback pin configured to receive an output voltage signal of the resonant mode power converter circuit;
- processing circuitry configured to determine a switching frequency based on the input voltage signal and the output voltage signal;
- a first control pin configured to deliver a first control signal to the first switch at the switching frequency;
- and
- a second control pin configured to deliver a second control signal the second switch at the switching frequency, wherein the processing circuitry is further configured to:
- cause the first control pin to refrain from delivering control signals to the first switch during a power saving mode;
- cause the second control pin to refrain from delivering control signals to the second switch during the power saving mode;
- and
- determine the switching frequency for a burst mode based on the input voltage signal and the output voltage signal, wherein the burst mode occurs after the power saving mode.
(canceled)
A method for controlling a switching frequency of a first switch and a second switch of a resonant mode power converter circuit, the method comprising:
- receiving an input voltage signal of the resonant mode power converter circuit;
- receiving an output voltage signal of the resonant mode power converter circuit;
- determining the switching frequency based on the input voltage signal and the output voltage signal;
- delivering a first control signal to the first switch at the switching frequency;
- delivering a second control signal to the second switch at the switching frequency;
- refraining from delivering control signals to the first switch during a power saving mode;
- refraining from delivering control signals to the second switch during the power saving mode;
- and
- determining the switching frequency for a burst mode based on the input voltage signal and the output voltage signal, wherein the burst mode occurs after the power saving mode.
(canceled)
A controller device for a resonant mode power converter circuit, the controller device comprising:
- a feed-forward pin configured to receive an input voltage signal of the resonant mode power converter circuit during a power saving mode;
- a feedback pin configured to receive an output voltage signal of the resonant mode power converter circuit;
- a first control pin configured to deliver control signals to a first switch;
- a second control pin configured to deliver control signals to a second switch;
- and
- processing circuitry configured to:
- cause the first control pin to refrain from delivering control signals to the first switch during the power saving mode,
- cause the second control pin to refrain from delivering control signals to the second switch during the power saving mode,
- determine an initial switching frequency for a burst mode, wherein the burst mode occurs after the power saving mode, and wherein the initial switching frequency is greater than a resonant frequency of the resonant mode power converter circuit,
- determine a minimum burst switching frequency based on the input voltage signal, wherein the initial switching frequency is less than the resonant frequency,
- cause the first control pin to deliver a first control signal to the first switch at the initial switching frequency at a beginning of the burst mode,
- cause the second control pin to deliver a second control signal to the second switch at the initial switching frequency at the beginning of the burst mode, and
- reduce, during the burst mode, the switching frequency from the initial switching frequency to the minimum burst switching frequency.
Dependencies are inferred from the claim text.