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公开(公告)号：US20230231486A1
公开(公告)日：2023-07-20
申请号：US18084835
申请日：2022-12-20
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yuedong Chen , Junlin Qian
CPC classification number: H02M3/33592 , H02M1/088
Abstract: A power converter includes a switch control circuit for driving a high side switch of the power converter comprising the high side switch and a low side switch connected in series. The switch control circuit may have a first terminal for receiving an input signal, a second terminal used as a reference ground terminal of the switch control circuit, and a third terminal used as an output terminal to provide a driving signal, the switch control circuit can draw power from the input signal and may be configured to control a logic state of the driving signal based on a logic state of the input signal relative to a reference ground signal at the second terminal or based on a current flowing through the first terminal.
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2.发明申请公开(公告)号：US20250007320A1
公开(公告)日：2025-01-02
申请号：US18755984
申请日：2024-06-27
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Junlin Qian , Yuedong Chen
Abstract: A control circuit for controlling a power supply voltage is provided. The control circuit includes a charging control circuit and a charging current source. The charging control circuit provides a charging control signal based on an input voltage and the power supply voltage. The charging current source receives the input voltage and provides a charging current to a power supply capacitor for generating the power supply voltage based on the charging control signal. In a charging window, the charging control signal controls the charging current source to start providing the charging current for charging the power supply capacitor after a first time-interval from a start point of the charging window. The charging control signal controls the charging current source to stop providing the charging current when the power supply voltage increases to a charging stop reference voltage. A continuous time duration of providing the charging current is a charging period.
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公开(公告)号：US20250167687A1
公开(公告)日：2025-05-22
申请号：US18953063
申请日：2024-11-20
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Junlin Qian , Yuedong Chen
Abstract: A controller for a switching converter with a power switch includes a gate driver, a first transistor, and a regulator. The gate driver and provides a drive voltage to control the power switch based on a switch control signal. The first transistor is coupled between a first power supply node and a power supply terminal of the gate driver. A current sense signal representative of a current flowing through the power switch is provided to a floating node in response to the switch control signal being a first level, and the floating node is coupled to a reference ground in response to the switch control signal being a second level. A gate voltage of the first transistor is adjusted by the regulator coupled to the floating node based on a float reference voltage and a feedback voltage provided by a feedback stage.
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公开(公告)号：US20250007383A1
公开(公告)日：2025-01-02
申请号：US18754999
申请日：2024-06-26
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yuedong Chen , Junlin Qian
Abstract: A control circuit for controlling a power supply voltage of an integrated circuit is provided. The control circuit includes a charging current source. The charging current source receives an input voltage and provides a charging current to a power supply capacitor for generating the power supply voltage. The charging current source starts providing the charging current for charging the power supply capacitor when the input voltage decreases to a charging start threshold voltage and stops providing the charging current when the power supply voltage increases to a charging stop reference voltage. The charging start threshold voltage is adjusted to get a continuous time duration of providing the charging current to be substantially symmetric with respect to a minimum value of the input voltage.
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