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61.发明授权公开(公告)号：US11309784B2
公开(公告)日：2022-04-19
申请号：US16992065
申请日：2020-08-12
发明人： Chih-Lien Chang , Chun-Chieh Wang
摘要： The disclosure provides a power conversion circuit with a multi-function pin and a multi-function setting method thereof. The multi-function pin is coupled to an external setting circuit. The power conversion circuit includes a first function circuit, a second function circuit, and a judging circuit. The first function circuit is coupled to the multi-function pin. The second function circuit is coupled to the multi-function pin. The judging circuit is coupled to the multi-function pin, the first function circuit, and the second function circuit. The judging circuit provides a setting current to the multi-function pin, so that the external setting circuit generates a voltage according to the setting current. The judging circuit judges the type of external setting circuit according to voltage so as to activate the first function circuit or the second function circuit accordingly. The disclosure also provides a multi-function setting method in which the power conversion circuit automatically activates the corresponding function according to the type of external setting circuit.
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公开(公告)号：US20210399635A1
公开(公告)日：2021-12-23
申请号：US17341437
申请日：2021-06-08
发明人： Chih-Lien CHANG , Chun-Chieh WANG
摘要： A control circuit of a power converter is coupled to an output stage and controls it to convert an input voltage into an output voltage and generate an output current. The control circuit includes a ripple generation circuit, a synthesis circuit, an error amplifier, a comparator and a PWM circuit. The ripple generation circuit generates a ripple signal according to an input voltage, an output voltage and output current. The synthesis circuit receives the ripple signal and a first feedback signal related to output voltage to provide a second feedback signal. The error amplifier receives the second feedback signal and a reference voltage to generate an error signal. The comparator receives a ramp signal and error signal to generate a comparison signal. The PWM circuit generates a PWM signal to control output stage according to the comparison signal. A slope of ripple signal is changed with the output current.
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公开(公告)号：US11199564B2
公开(公告)日：2021-12-14
申请号：US17067768
申请日：2020-10-12
发明人： Yi-Xian Jan
IPC分类号： G01R19/10
摘要： A current sensing circuit is provided. The current sensing circuit includes an amplifier, an input resistor, a sensing resistor, and a feedback circuit. The amplifier has a first input terminal, a second input terminal, a third input terminal, and an output terminal. The input resistor is coupled between the first input terminal and the second input terminal of the amplifier. The sensing resistor is coupled between the second input terminal and the third input terminal of the amplifier. The feedback circuit is coupled between the first input terminal and the output terminal. When an input current flows through the sensing resistor, a voltage across the sensing resistor is equal to a voltage across the input resistor, and the feedback circuit correspondingly outputs a sensing voltage according to the input current.
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公开(公告)号：US11121618B2
公开(公告)日：2021-09-14
申请号：US16699086
申请日：2019-11-28
发明人： Chih-Wen Hsiao , Wen-Chieh Tsai
IPC分类号： H02M1/08 , H03K17/082 , H02M3/156
摘要： The disclosure provides a power switching circuit. The power switching circuit includes a driving circuit, a determining circuit, a first power switch, and a second power switch. The driving circuit outputs a first driving signal and a second driving signal. The determining circuit is coupled to the driving circuit and outputs a control signal to the driving circuit. The first power switch is coupled to a first input voltage and receives the first driving signal. The second power switch is coupled to a second input voltage and receives the second driving signal. When the first power switch and the second power switch are switched, the second driving signal rises from a first level to a preset level, and the determining circuit controls the driving circuit to utilize the first driving signal to turn off the first power switch.
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公开(公告)号：US20210148956A1
公开(公告)日：2021-05-20
申请号：US17067768
申请日：2020-10-12
发明人： Yi-Xian Jan
IPC分类号： G01R19/10
摘要： A current sensing circuit is provided. The current sensing circuit includes an amplifier, an input resistor, a sensing resistor, and a feedback circuit. The amplifier has a first input terminal, a second input terminal, a third input terminal, and an output terminal. The input resistor is coupled between the first input terminal and the second input terminal of the amplifier. The sensing resistor is coupled between the second input terminal and the third input terminal of the amplifier. The feedback circuit is coupled between the first input terminal and the output terminal. When an input current flows through the sensing resistor, a voltage across the sensing resistor is equal to a voltage across the input resistor, and the feedback circuit correspondingly outputs a sensing voltage according to the input current.
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公开(公告)号：US10978565B2
公开(公告)日：2021-04-13
申请号：US16454072
申请日：2019-06-27
发明人： Chin-Fu Chen , Yi-Yun Tsai
摘要： Provided is a power transistor device including a substrate, a first electrode, and a second electrode. The substrate has an active region and a terminal region. The terminal region surrounds the active region. The substrate includes a first trench and a second trench. The first trench is disposed within the active region and adjacent to the terminal region. The second trench is disposed within the terminal region and adjacent to the active region. The first electrode and the second electrode are respectively disposed in the first trench and the second trench. The first electrode and the second electrode both are electrically floating.
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公开(公告)号：US20210067042A1
公开(公告)日：2021-03-04
申请号：US16991101
申请日：2020-08-12
发明人： Hsien-Cheng LIU , Chien-Fu CHEN
IPC分类号： H02M3/158
摘要： A multi-phase switched capacitor power converter and a control method thereof are disclosed. The multi-phase switched capacitor power converter includes a first phase converting circuit and a second phase converting circuit. The first phase converting circuit and the second phase converting circuit include switches and a flying capacitor respectively. The switches are coupled in series and there are a first node and a second node between the switches. The flying capacitor is coupled to the first node and the second node. When the first phase converting circuit is in an operating mode and the second phase converting circuit is in a standby mode, the control method controls a part of the switches in the second phase converting circuit continuously conducted to charge the flying capacitor.
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公开(公告)号：US10917008B2
公开(公告)日：2021-02-09
申请号：US16731232
申请日：2019-12-31
发明人： Chih-Wen Hsiao , Chien-Ming Chen
摘要： An output stage circuit of a power conversion circuit includes a first power switch, a driving circuit, a first current source, a second current source and a combining circuit. The first power switch is coupled to a second terminal of a bootstrap capacitor. The driving circuit is coupled to the first terminal of the bootstrap capacitor and the first power switch and provides a control signal to the first power switch. The first current source generates a first current according to the control signal. The second current source generates a second current according to a reference voltage which is a first voltage at the first terminal or a second voltage at the second terminal. The combining circuit, coupled to the driving circuit, the first current source and the second current source, generates a switch operation indicating signal to the driving circuit according to the first current and second current.
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公开(公告)号：US10855182B2
公开(公告)日：2020-12-01
申请号：US16716699
申请日：2019-12-17
发明人： Wei-Hsiu Hung , Chih-Lien Chang
摘要： A power conversion circuit includes an error amplifying circuit, a first comparison circuit, a second comparison circuit and a control circuit. The error amplifying circuit provides an output signal. The first comparison circuit, coupled to the error amplifying circuit, receives the output signal and a ramp signal to generate a first comparison signal. The second comparison circuit receives an output voltage and a first reference voltage and provides a second comparison signal. The control circuit, coupled to the error amplifying circuit, the first comparison circuit and the second comparison circuit, provides a control signal to control the error amplifying circuit according to the first comparison signal, the second comparison signal and an enabling signal. In a first operation mode of error amplifying circuit, the output signal is an error amplifying signal. In a second operation mode of error amplifying circuit, the output signal is a second reference voltage.
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公开(公告)号：US10715114B1
公开(公告)日：2020-07-14
申请号：US16591642
申请日：2019-10-03
发明人： Chao-Chung Huang , Kuo-Jen Kuo , Yi-Xian Jan
摘要： A filter and an operating method thereof are provided. The filter includes a logic circuit, a power circuit and a filter circuit. The logic circuit provides a switching control signal. The power circuit is coupled to the logic circuit. The filter circuit is coupled to the power circuit and the logic circuit. The filter circuit includes an amplifier, a first capacitor and a first transistor. An output end of the amplifier is coupled to the logic circuit, and provides an output signal. The first capacitor is coupled between an input end and output end of the amplifier. The first transistor is connected in parallel with the first capacitor. A control end of the first transistor is coupled to the power circuit. The logic circuit provides a switching control signal to the power circuit according to the output signal. The power circuit supplies a control voltage to the first transistor according to the switching control signal. Therefore, the filter of the present invention and its method of operation can provide an accurate filtered signal output function.
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