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公开(公告)号：US09742370B2
公开(公告)日：2017-08-22
申请号：US15350431
申请日：2016-11-14
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Anu Chakravarty , Gautham D. Kamath , John C. Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.
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公开(公告)号：US20150032396A1
公开(公告)日：2015-01-29
申请号：US14182850
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Gautham Kamath , John Christopher Tucker , Christian Larsen
IPC: G01R27/26
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: A controller of a boost converter may be configured to dynamically adjust conditions within the boost converter by monitoring conditions in the boost converter. For example, the controller may determine an current inductance value for an inductor of the boost converter by monitoring a current through the inductor. When the inductance value of the inductor is known, a slope compensation value may be used in determining a transition time between charging the inductor of the boost converter and discharging the inductor.
Abstract translation: 升压转换器的控制器可以被配置为通过监视升压转换器中的条件来动态地调节升压转换器内的状况。 例如，控制器可以通过监视通过电感器的电流来确定升压转换器的电感器的电流电感值。 当电感器的电感值已知时，可以使用斜率补偿值来确定对升压转换器的电感器充电和放电电感器之间的转换时间。
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公开(公告)号：US09912238B1
公开(公告)日：2018-03-06
申请号：US14182939
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Gautham D. Kamath , John Christopher Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: During operation of a boost converter conditions may exist that result in a reverse current through the boost converter, such as when a load drop from the boost converter occurs. During the reverse current period, inductance value determinations made during a forward current period may be used to estimate a magnitude of the reverse current and this estimate used by a controller to control the boost converter and return the boost converter to normal operation. The controller may control the boost converter by changing a ratio of charging and discharging time for an inductor of the boost converter, decreasing a bandwidth of the boost converter, and/or increasing a resistance of the boost converter.
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公开(公告)号：US09520782B2
公开(公告)日：2016-12-13
申请号：US14182798
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Anu Chakravarty , Gautham Kamath , John Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.
Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。
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Patent Agency Ranking
公开(公告)号：US09912312B2
公开(公告)日：2018-03-06
申请号：US14182850
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Gautham Kamath , John Christopher Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: A controller of a boost converter may be configured to dynamically adjust conditions within the boost converter by monitoring conditions in the boost converter. For example, the controller may determine an current inductance value for an inductor of the boost converter by monitoring a current through the inductor. When the inductance value of the inductor is known, a slope compensation value may be used in determining a transition time between charging the inductor of the boost converter and discharging the inductor.
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公开(公告)号：US09768689B1
公开(公告)日：2017-09-19
申请号：US14183096
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Gautham D. Kamath , Michael Kost
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Thermal levels in an inductor of a boost converter may be managed by implementing peak current limits for the boost converter. For example, an inductor may be allowed to conduct above a certain peak current limit for a certain period of time before the current is reduced by a controller to a low current limit. The controller may hold the low current limit in place for a certain period of time, after which the current through the inductor is allowed to again exceed the low current limit. However, if the high current limit is again exceeded or sustained for a certain period of time, the low current limit may be again imposed by the controller.
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公开(公告)号：US20170063318A1
公开(公告)日：2017-03-02
申请号：US15350431
申请日：2016-11-14
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Anu Chakravarty , Gautham D. Kamath , John C. Tucker , Christian Larsen
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.
Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。
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公开(公告)号：US09391517B1
公开(公告)日：2016-07-12
申请号：US14183149
申请日：2014-02-18
Applicant: Cirrus Logic, Inc.
Inventor： Ullas Pazhayaveetil , Michael Kost
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Thermal levels in an inductor of a boost converter may be managed by controlling an average current through the inductor. For example, a switching frequency of the boost converter between charging and discharging the inductor may be increased or decreased. Increasing or decreasing the switching frequency results in a corresponding decrease or increase in the switching period for the boost converter. The controller may adjust the switching frequency to control the average current level while maintaining a peak-to-peak current level in the inductor by monitoring the inductance of the inductor and the peak current level in the inductor.
Abstract translation: 可以通过控制通过电感器的平均电流来管理升压转换器的电感器中的热水平。 例如，可以增大或减小升压转换器在充电和放电电感器之间的开关频率。 增加或减少开关频率导致升压转换器的开关周期的相应减小或增加。 控制器可以调节开关频率以控制平均电流电平，同时通过监测电感器的电感和电感器中的峰值电流电平来保持电感器中的峰 - 峰电流电平。
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公开(公告)号：US20150030183A1
公开(公告)日：2015-01-29
申请号：US14182798
申请日：2014-02-18
Applicant: CIRRUS LOGIC, INC.
Inventor： Ullas Pazhayaveetil , Jeffrey May , Anu Chakravarty , Gautham Kamath , John Tucker , Christian Larsen
IPC: H03G3/00
CPC classification number: H02M3/158 , G01R21/06 , G01R27/2611 , G06F1/3203 , H02M3/156 , H03F3/187 , H03F3/2175 , H03G3/004
Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.
Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。
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