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公开(公告)号：US11527960B2
公开(公告)日：2022-12-13
申请号：US16865762
申请日：2020-05-04
发明人： Yushan Li , Liming Ye , Heping Dai
摘要： An apparatus includes a pulse-width modulation (PWM) generator configured to generate a PWM signal for controlling a power switch of a power converter, a bias switch and a bias capacitor connected in series and coupled to a magnetic winding of the power converter and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the magnetic winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.
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公开(公告)号：US20230133307A1
公开(公告)日：2023-05-04
申请号：US18064816
申请日：2022-12-12
发明人： Yushan Li , Liming Ye , Heping Dai
摘要： An apparatus includes a controller configured to generate a PWM signal for controlling a power switch of a forward converter, a bias switch and a bias capacitor connected in series and coupled to a bias winding of the forward converter, and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the bias winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.
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公开(公告)号：US11784577B2
公开(公告)日：2023-10-10
申请号：US16926516
申请日：2020-07-10
发明人： Yushan Li , Heping Dai , Dianbo Fu
CPC分类号： H02M7/2176 , H02M3/158 , H03F1/0227 , H03F1/0266 , H03F3/2173 , H03F3/245 , H02M1/008 , H02M1/0045
摘要： A system includes a current-mode switcher configured to provide a direct current (DC) voltage for a noise sensitive load, and a linear amplifier connected to an output of the current-mode switcher, the linear amplifier configured to draw a reduced supply voltage through at least one power conversion device that is coupled between a power source and the linear amplifier.
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公开(公告)号：US11848603B2
公开(公告)日：2023-12-19
申请号：US18064816
申请日：2022-12-12
发明人： Yushan Li , Liming Ye , Heping Dai
CPC分类号： H02M1/40 , H02M1/08 , H02M3/33569 , H02M3/33592 , H02M3/00 , H02M3/33573
摘要： An apparatus includes a controller configured to generate a PWM signal for controlling a power switch of a forward converter, a bias switch and a bias capacitor connected in series and coupled to a bias winding of the forward converter, and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the bias winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.
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公开(公告)号：US11664726B2
公开(公告)日：2023-05-30
申请号：US17473309
申请日：2021-09-13
发明人： Yushan Li
CPC分类号： H02M3/07 , H02M1/0045
摘要： A method includes configuring a switched capacitor converter to operate in a switching mode and configuring the switched capacitor converter to enter into a bypass mode after applying a charging mode to the switched capacitor converter, wherein as a result of applying the charging mode, the switched capacitor converter has a smooth transition from the switching mode to the bypass mode.
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