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公开(公告)号：US10594210B1
公开(公告)日：2020-03-17
申请号：US16387335
申请日：2019-04-17
发明人： Mark Mercer , Karthik Jayaraman , Chanchal Gupta , Kevin Dowdy
摘要： A two-stage power converter includes a dual-level driver to control a current conducted by a switch transistor in a charge pump to control the charging of a flying capacitor in the charge pump.
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公开(公告)号：US10181792B2
公开(公告)日：2019-01-15
申请号：US15940905
申请日：2018-03-29
发明人： Mark Mercer , Kevin Dowdy , Karthik Jayaraman
摘要： A synchronous buck converter is provided in which a replica transistor has its drain coupled to a drain of the low-side switch transistor. A current sensing amplifier drives a scaled current into the replica transistor such that the drain-to-source voltage of the replica transistor substantially equals the drain-to-source voltage of the low-side switch. The replica transistor is much smaller than the low switch transistor such that the replica transistor's on resistance is higher by a scale factor Kf as compared to the on resistance for the low-side switch transistor.
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公开(公告)号：US20220173655A1
公开(公告)日：2022-06-02
申请号：US17106837
申请日：2020-11-30
发明人： Mark Mercer , Karthik Jayaraman
摘要： “The present document relates to power converters with multiple feedback loops. The present document relates to a power converter with at least two feedback loops. The power converter may include a first error amplifier configured to generate a first error signal based on a first reference signal and a first feedback signal. The power converter may include a second error amplifier configured to generate a second error signal based on a second reference signal and a second feedback signal. The power converter may include a selector circuit configured to generate a selection signal by selecting the first error signal or the second error signal. The power converter may include a first clamp circuit configured to limit the first error signal to a first threshold value. The power converter may include a first threshold value generator circuit configured to generate the first threshold value dependent on the first error signal.”
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公开(公告)号：US11349391B1
公开(公告)日：2022-05-31
申请号：US17106837
申请日：2020-11-30
发明人： Mark Mercer , Karthik Jayaraman
摘要： The present document relates to power converters with multiple feedback loops. The present document relates to a power converter with at least two feedback loops. The power converter may include a first error amplifier configured to generate a first error signal based on a first reference signal and a first feedback signal. The power converter may include a second error amplifier configured to generate a second error signal based on a second reference signal and a second feedback signal. The power converter may include a selector circuit configured to generate a selection signal by selecting the first error signal or the second error signal. The power converter may include a first clamp circuit configured to limit the first error signal to a first threshold value. The power converter may include a first threshold value generator circuit configured to generate the first threshold value dependent on the first error signal.
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公开(公告)号：US10530256B1
公开(公告)日：2020-01-07
申请号：US16206327
申请日：2018-11-30
发明人： Karthik Jayaraman , Lasse Harju
摘要： Power converters and method with reverse charge capability are presented. A power converter operates either in a buck mode for transferring electrical power from a first terminal of the power converter to a second terminal of the power converter, or in a boost mode for transferring electrical power from the second terminal of the power converter to the first terminal of the power converter. The power converter has several switching elements, a flying capacitor, an inductor, and a control unit. The switching elements couple the first terminal of the power converter and the flying capacitor, couple the first terminal of the flying capacitor and a first terminal of the inductor, couple the first terminal of the inductor and a second terminal of the flying capacitor and couple the second terminal of the flying capacitor and a reference potential. The control unit controls the switching elements.
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公开(公告)号：US20220173656A1
公开(公告)日：2022-06-02
申请号：US17106874
申请日：2020-11-30
发明人： Mark Mercer , Karthik Jayaraman
IPC分类号： H02M3/155
摘要： The present document relates to power converters with multiple feedback loops. The present document relates to a power converter with at least two feedback loops. The power converter may comprise a first error amplifier and a first capacitive element. The power converter may comprise a second error amplifier and a second capacitive element, wherein the second error amplifier is configured to generate, based on a second reference value and a second feedback signal, a second error current for charging the second capacitive element. The power converter may comprise a selector circuit configured to generate a selection signal by comparing a first voltage of the first capacitive element and a second voltage of the second capacitive element. The power converter may comprise a first track amplifier circuit configured to establish an additional current path from a supply rail to the first capacitive element for accelerated charging of said first capacitive element.
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公开(公告)号：US20180219484A1
公开(公告)日：2018-08-02
申请号：US15940905
申请日：2018-03-29
发明人： Mark Mercer , Kevin Dowdy , Karthik Jayaraman
CPC分类号： H02M3/158 , G01R19/0092 , G05F3/02 , H02M3/156 , H02M2001/0009 , H03K2217/0027 , Y02B70/1425
摘要： A replica circuit is provided for a buck converter to sense a replica of the current through the low-side switch transistor without the use of a sense resistor.
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