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公开(公告)号：US20240313768A1
公开(公告)日：2024-09-19
申请号：US18306378
申请日：2023-04-25
发明人： Sri Navaneethakrishnan Easwaran , Angelo Pereira , Yueming Sun , Kae Wong , Ahmed E Hashim , Artur Lewinski
IPC分类号： H03K17/687 , H03K17/10 , H03K17/567
CPC分类号： H03K17/687 , H01L27/02 , H03K17/102 , H03K17/567
摘要： Described embodiments include a voltage converter power circuit having a high-voltage rated first transistor with a first current terminal coupled to an input voltage terminal, and a second current terminal. A second transistor, a low-voltage rated transistor, has a second control terminal, a third current terminal coupled to the second current terminal, and a fourth current terminal coupled to a switching terminal. A third transistor, a high-voltage rated transistor, has a fifth current terminal coupled to the switching terminal, a sixth current terminal, and a third control terminal. A fourth transistor, a low-voltage rated transistor, is coupled between the sixth current terminal and a ground terminal. A bleeder circuit is coupled between the seventh and eighth current terminals and is configured to prevent a voltage across the fourth transistor from exceeding a breakdown voltage.
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公开(公告)号：US10079538B2
公开(公告)日：2018-09-18
申请号：US15296733
申请日：2016-10-18
发明人： Xiaochun Zhao , Hasibur Rahman , Artur Lewinski , Tulong Yang
CPC分类号： H02M3/07 , H02M3/1582 , H03K2217/0081
摘要： A circuit includes a charge pump to generate an output reference voltage. A first bootstrap refresh circuit receives the reference voltage from the charge pump and is coupled between first and second bootstrap nodes of a DC/DC converter. The first bootstrap refresh circuit supplies first charge current that is sourced from the first bootstrap node to the second bootstrap node based on a control signal indicating a first operating mode of the DC/DC converter. A second bootstrap refresh circuit receives the reference voltage from the charge pump and is coupled between the first and second bootstrap nodes of the DC/DC converter. The second bootstrap refresh circuit supplies second charge current from the second bootstrap node to the first bootstrap node based on the control signal indicating a second operating mode of the DC/DC converter.
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