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公开(公告)号：US20230336074A1
公开(公告)日：2023-10-19
申请号：US18123961
申请日：2023-03-20
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Kuo-Chi Liu , Ta-Yung Yang , Wei-Hsu Chang
CPC classification number: H02M3/07 , H02M1/0012
Abstract: A power converter includes first to fourth switches, a flying capacitor, an inductor, an output capacitor and a control circuit. The first to fourth switches are sequentially coupled in cascode. The first switch is used to receive an input voltage. The flying capacitor is coupled across the second switch and the third switch, the inductor is coupled to the second switch, the third switch and the output capacitor. The output capacitor is used to output an output voltage. When the input voltage is less than an input voltage threshold, the control circuit is used to switch the first to fourth switches according to a resonant frequency. When the input voltage exceeds the input voltage threshold, the control circuit switch is used to the first to fourth switches according to a regulated frequency exceeding the resonant frequency.
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公开(公告)号：US20150349690A1
公开(公告)日：2015-12-03
申请号：US14335877
申请日：2014-07-19
Applicant: RICHTEK TECHNOLOGY CORP
Inventor： Wei-Hsu Chang , Jo-Yu Wang
CPC classification number: H02P23/04 , H02P25/034
Abstract: A driving signal generator for driving a transducer includes: an input terminal for receiving a control signal; and a digital filter, coupled to the input terminal, for generating a driving signal to drive the transducer in response to the control signal. The digital filter is a notch filter, and the transfer function of the digital filter is related to the characteristics of the transducer.
Abstract translation: 用于驱动换能器的驱动信号发生器包括：用于接收控制信号的输入端; 以及耦合到输入端的数字滤波器，用于响应于控制信号产生驱动信号以驱动换能器。 数字滤波器是陷波滤波器，数字滤波器的传递函数与传感器的特性有关。
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3.发明公开公开(公告)号：US20230336075A1
公开(公告)日：2023-10-19
申请号：US18131361
申请日：2023-04-05
Applicant: RICHTEK TECHNOLOGY CORP.
Inventor： Kuo-Chi Liu , Ta-Yung Yang , Wei-Hsu Chang
CPC classification number: H02M3/07 , H02M1/0058 , H02M1/0012 , H03K19/20
Abstract: A power converter includes first to fourth switches, a flying capacitor, an inductor, an output capacitor and a control circuit. The first to fourth switches are sequentially coupled in cascode. The first switch receives an input voltage, and the fourth switch is further coupled to a ground terminal. The flying capacitor is coupled across the second switch and the third switch, the inductor is coupled to the second switch, the third switch and the output capacitor. The output capacitor is used to output an output voltage. In a non-regulated mode, the control circuit switches the first to fourth switches according to a resonant frequency. In a regulated mode, the control circuit switches the first to fourth switches according to a regulated frequency exceeding the resonant frequency. When the flying capacitor is coupled to the inductor, the flying capacitor and the inductor can form a resonant circuit having the resonant frequency.
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