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公开(公告)号：US12034367B2
公开(公告)日：2024-07-09
申请号：US17851015
申请日：2022-06-27
发明人： Chen-Pin Huang , Chia-Chun Li , Chen-Lin Hsu , Hung-Yu Cheng , Wan-Hsuan Yang
CPC分类号： H02M1/44 , H02M1/0009 , H02M1/34 , H02M3/158
摘要： A switching power converter includes: a power stage circuit, including at least one transistor which is configured to operably switch an inductor to convert an input power to an output power; and an active EMI filter circuit, including at least one amplifier, wherein the at least one amplifier is configured to operably sense a noise input signal which is related to a switching noise caused by the switching of the power stage circuit, and amplify the noise input signal to generate a noise canceling signal, wherein the noise canceling signal is injected into an input node of the switching power converter, so as to suppress the switching noise and thus reducing EMI, wherein the input power is provided through the input node to the power stage circuit.
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公开(公告)号：US20220416652A1
公开(公告)日：2022-12-29
申请号：US17851015
申请日：2022-06-27
发明人： Chen-Pin Huang , Chia-Chun Li , Chen-Lin Hsu , Hung-Yu Cheng , Wan-Hsuan Yang
摘要： A switching power converter includes: a power stage circuit, including at least one transistor which is configured to operably switch an inductor to convert an input power to an output power; and an active EMI filter circuit, including at least one amplifier, wherein the at least one amplifier is configured to operably sense a noise input signal which is related to a switching noise caused by the switching of the power stage circuit, and amplify the noise input signal to generate a noise canceling signal, wherein the noise canceling signal is injected into an input node of the switching power converter, so as to suppress the switching noise and thus reducing EMI, wherein the input power is provided through the input node to the power stage circuit.
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公开(公告)号：US20170201178A1
公开(公告)日：2017-07-13
申请号：US15217102
申请日：2016-07-22
发明人： Hung-Yu Cheng
CPC分类号： H02M3/1582 , H02M1/08 , H02M2001/0054 , Y02B70/1491
摘要： The present invention provides a dual constant time buck-boost switching regulator, and a control circuit and a method thereof. The buck-boost switching regulator converts an input voltage to an output voltage and it includes a buck circuit and a boost circuit. The buck circuit includes an inductor, a buck power switch and a buck power device. The boost circuit includes the inductor, a boost power switch and a boost power device. The present invention controls the buck power switch to be OFF by a constant OFF time in the buck conversion mode, and controls the boost power switch to be ON by a constant ON time in the boost conversion mode. An offset signal ensures that the buck-boost regulator operates only in pure buck conversion mode and pure boost conversion mode, but does not need to operate in a buck-boost conversion mode.
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公开(公告)号：US11171560B2
公开(公告)日：2021-11-09
申请号：US16779764
申请日：2020-02-03
发明人： Po-Yu Chiang , Hung-Yu Cheng
IPC分类号： H02M1/36 , H02M3/07 , H02M1/08 , H01L27/092 , H03K3/03
摘要： A switching regulator having a low start-up voltage includes a power stage and a switch control circuit. The switch control circuit includes a power control switch. The power control switch is formed by a low threshold voltage transistor having a first conductivity type in a semiconductor substrate. The low threshold voltage transistor having the first conductivity type includes a first lightly doped region having a second conductivity type which forms a channel region of the low threshold voltage transistor having the first conductivity type. The semiconductor substrate includes a second lightly doped region having the second conductivity type which is formed by a same manufacturing process as the first lightly doped region having the second conductivity type. The second lightly doped region having the second conductivity type forms adrift region of a high-voltage transistor having the second conductivity type in the semiconductor substrate.
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公开(公告)号：US20200304018A1
公开(公告)日：2020-09-24
申请号：US16779764
申请日：2020-02-03
发明人： Po-Yu Chiang , Hung-Yu Cheng
IPC分类号： H02M1/36 , H02M3/07 , H02M1/08 , H03K3/03 , H01L27/092
摘要： A switching regulator having a low start-up voltage includes a power stage and a switch control circuit. The switch control circuit includes a power control switch. The power control switch is formed by a low threshold voltage transistor having a first conductivity type in a semiconductor substrate. The low threshold voltage transistor having the first conductivity type includes a first lightly doped region having a second conductivity type which forms a channel region of the low threshold voltage transistor having the first conductivity type. The semiconductor substrate includes a second lightly doped region having the second conductivity type which is formed by a same manufacturing process as the first lightly doped region having the second conductivity type. The second lightly doped region having the second conductivity type forms adrift region of a high-voltage transistor having the second conductivity type in the semiconductor substrate.
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6.发明申请公开(公告)号：US20190296642A1
公开(公告)日：2019-09-26
申请号：US16171422
申请日：2018-10-26
发明人： Kuo-Chun Wu , Hung-Yu Cheng
摘要： When a ramp signal intersects a feedback related signal, a constant time switching regulator enters a first state and maintains in the first state for a constant time, and after the constant time ends, when the ramp signal exceeds the feedback related signal, the switching regulator enters a second state, while when the ramp signal does not exceed the feedback related signal, the switching regulator enters a third state. In the first state, the first end of an inductor is connected to input voltage and the second end of the inductor is connected to output voltage; in the second state, the first end is connected to ground and the second end is connected to output voltage; and in the third state, the first end is connected to input voltage and the second end is connected to ground.
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公开(公告)号：US09041374B2
公开(公告)日：2015-05-26
申请号：US14206877
申请日：2014-03-12
发明人： Hung-Yu Cheng , Chung-Lung Pai , Tzu Huan Chiu , Chien-Ping Lu
CPC分类号： H02M3/156 , H02M3/1588 , H02M2001/0032 , Y02B70/1466 , Y02B70/16
摘要： A power converting circuit includes an upper gate switch, a transistor, a current source circuit, a comparator circuit, a delay circuit, and a pulse width modulation signal generating circuit. The transistor and the current source circuit provide a reference signal. The comparator circuit generates a comparing signal according to the reference signal and an output signal provided by the upper gate switch. The delay circuit generates a delay signal according to the comparing signal and a clock signal. The pulse width modulation signal generating circuit generates a control signal for the upper gate switch according to the delay signal and the clock signal for configuring the conduction status of the upper gate switch. The power converting circuit adjusts the conduction time of the upper gate switch according to the reference signal and the output signal.
摘要翻译： 电源转换电路包括上栅极开关，晶体管，电流源电路，比较器电路，延迟电路和脉宽调制信号发生电路。 晶体管和电流源电路提供参考信号。 比较器电路根据参考信号和由上部门极开关提供的输出信号产生比较信号。 延迟电路根据比较信号和时钟信号产生延迟信号。 脉冲宽度调制信号发生电路根据延迟信号产生用于上部栅极开关的控制信号和用于构成上部栅极开关的导通状态的时钟信号。 功率转换电路根据参考信号和输出信号调节上部栅极开关的导通时间。
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8.发明授权公开(公告)号：US12055964B2
公开(公告)日：2024-08-06
申请号：US18299985
申请日：2023-04-13
发明人： Hung-Yu Cheng , Keng-Hong Chu , Li-Chen Cheng , Tsung-Han Yu
CPC分类号： G05F1/565 , G05F1/561 , H03F3/45273 , H03F3/45475 , H03F2200/261
摘要： A multi-loop error amplifier circuit for generating an error amplification signal includes: a first operational transconductance amplifier (OTA) including a first current output stage which generates a first transconductance amplification current in a predetermined current direction according to a first voltage difference between a positive terminal and a negative input terminal of the first OTA; a second OTA including a second current output stage which generates a second transconductance amplification current in the predetermined current direction according to a second voltage difference between a positive terminal and a negative input terminal of the second OTA. The first and the second current output stages are coupled in series to generate a first error output current. The error amplification signal is generated according to the first error output current which is equal to the smaller one of the first and the second transconductance amplification currents.
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9.发明公开公开(公告)号：US20230359232A1
公开(公告)日：2023-11-09
申请号：US18299985
申请日：2023-04-13
发明人： Hung-Yu Cheng , Keng-Hong Chu , Li-Chen Cheng , Tsung-Han Yu
CPC分类号： G05F1/565 , H03F3/45273 , G05F1/561 , H03F3/45475 , H03F2200/261
摘要： A multi-loop error amplifier circuit for generating an error amplification signal includes: a first operational transconductance amplifier (OTA) including a first current output stage which generates a first transconductance amplification current in a predetermined current direction according to a first voltage difference between a positive terminal and a negative input terminal of the first OTA; a second OTA including a second current output stage which generates a second transconductance amplification current in the predetermined current direction according to a second voltage difference between a positive terminal and a negative input terminal of the second OTA. The first and the second current output stages are coupled in series to generate a first error output current. The error amplification signal is generated according to the first error output current which is equal to the smaller one of the first and the second transconductance amplification currents.
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公开(公告)号：US20230043119A1
公开(公告)日：2023-02-09
申请号：US17749052
申请日：2022-05-19
发明人： Hung-Yu Cheng , Chi-Hsun Wu
摘要： A low EMI driver apparatus includes: a driver circuit configured to generate a driving signal according to a switch control signal, so as to drive at least one switch; and a driving strength control circuit configured to randomly control a driving strength of the driver circuit, thereby reducing an EMI generated when the at least one switch is driven according to the driving signal. In a specific form of the low EMI driver apparatus, the at least one switch includes plural switches, and the low EMI driver apparatus further includes: a dead time control circuit configured to randomly control a dead time between ON times of the plural switches, so as to reduce the EMI generated when the switches are driven according to the driving signal.
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