-
公开(公告)号：US12034367B2
公开(公告)日：2024-07-09
申请号：US17851015
申请日：2022-06-27
Applicant: Richtek Technology Corporation
Inventor： Chen-Pin Huang , Chia-Chun Li , Chen-Lin Hsu , Hung-Yu Cheng , Wan-Hsuan Yang
CPC classification number: H02M1/44 , H02M1/0009 , H02M1/34 , H02M3/158
Abstract: 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.
-
公开(公告)号：US20220416652A1
公开(公告)日：2022-12-29
申请号：US17851015
申请日：2022-06-27
Applicant: Richtek Technology Corporation
Inventor： Chen-Pin Huang , Chia-Chun Li , Chen-Lin Hsu , Hung-Yu Cheng , Wan-Hsuan Yang
Abstract: 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.
-
公开(公告)号：US20170201178A1
公开(公告)日：2017-07-13
申请号：US15217102
申请日：2016-07-22
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hung-Yu Cheng
CPC classification number: H02M3/1582 , H02M1/08 , H02M2001/0054 , Y02B70/1491
Abstract: 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.
-
公开(公告)号：US11171560B2
公开(公告)日：2021-11-09
申请号：US16779764
申请日：2020-02-03
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Po-Yu Chiang , Hung-Yu Cheng
IPC: H02M1/36 , H02M3/07 , H02M1/08 , H01L27/092 , H03K3/03
Abstract: 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.
-
公开(公告)号：US20200304018A1
公开(公告)日：2020-09-24
申请号：US16779764
申请日：2020-02-03
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Po-Yu Chiang , Hung-Yu Cheng
IPC: H02M1/36 , H02M3/07 , H02M1/08 , H03K3/03 , H01L27/092
Abstract: 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.
-
Patent Agency Ranking
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
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Kuo-Chun Wu , Hung-Yu Cheng
Abstract: 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.
-
公开(公告)号：US09041374B2
公开(公告)日：2015-05-26
申请号：US14206877
申请日：2014-03-12
Applicant: Richtek Technology Corporation
Inventor： Hung-Yu Cheng , Chung-Lung Pai , Tzu Huan Chiu , Chien-Ping Lu
CPC classification number: H02M3/156 , H02M3/1588 , H02M2001/0032 , Y02B70/1466 , Y02B70/16
Abstract: 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.
Abstract translation: 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。
-
公开(公告)号：US20240097567A1
公开(公告)日：2024-03-21
申请号：US18453586
申请日：2023-08-22
Applicant: Richtek Technology Corporation
Inventor： Hung-Yu Cheng , Wan-Hsuan Yang , Chi-Hsun Wu
CPC classification number: H02M3/158 , H02M1/0025 , H02M1/088 , H03K7/08
Abstract: A conversion control circuit is configured to generate a PWM (pulse width modulation) signal to control a power switch for switching an inductor to convert an input voltage to an output voltage. The steps of generating the PWM signal includes: enabling the PWM signal at a rising edge of a clock signal to turn on the power switch; disabling the PWM signal to turn off the power switch when an on-time exceeds a predetermined minimum on-time and the output voltage has reached an output level; triggering a next rising edge of the clock signal when the off-time exceeds a predetermined minimum off-time, the output voltage has not reached the output level, and a present cycle period of the clock signal has reached a predetermined cycle period.
-
9.发明公开公开(公告)号：US20230198404A1
公开(公告)日：2023-06-22
申请号：US17858149
申请日：2022-07-06
Applicant: Richtek Technology Corporation
Inventor： Hung-Yu Cheng , Tsung-Han Yu , Keng-Hong Chu
CPC classification number: H02M3/1582 , H02M1/0003
Abstract: A constant time buck-boost switching converter includes: a power switch circuit for switching a first terminal of an inductor between an input voltage and a ground, and for switching a second terminal of the inductor between an output voltage and the ground; and a modulation control circuit for generating a buck ramp signal and a boost ramp signal and for controlling the inductor according to comparisons of these two ramp signals with an error amplification signal, so as to convert the input voltage to the output voltage. The average levels of the buck ramp signal and the boost ramp signal are both equal to a product of the output voltage multiplied by a predetermined ratio. The upper limit of the buck ramp signal and the lower limit of the boost ramp signal are both equal to a product of the input voltage multiplied by the predetermined ratio.
-
公开(公告)号：US10097079B1
公开(公告)日：2018-10-09
申请号：US15883867
申请日：2018-01-30
Applicant: RICHTEK TECHNOLOGY CORPORATION
Inventor： Hung-Yu Cheng , Kuo-Chun Wu
Abstract: A dual constant time switching regulator includes: a power circuit including an inductor and at least a power switch for converting an input power to an output power, and a switching control circuit for generating a switch control signal to control the power switch, wherein the switching control circuit includes a comparison circuit for comparing an error amplified signal and a triangle wave signal to generate a comparison result, and a time determining circuit for generating the switch control signal according to the comparison result, wherein after the power switch turns ON, it keeps ON for at least a minimum ON time until the triangle wave signal is higher than the error amplified signal, and wherein after the power switch turns OFF, it keeps OFF for at least a minimum OFF time and until the triangle wave signal is lower than the error amplified signal.
-
-
-
-
-
-
-
-
-
Search Results
16
records
(took 0.041 seconds)
