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1.发明授权公开(公告)号：US12294304B2
公开(公告)日：2025-05-06
申请号：US18146493
申请日：2022-12-27
Applicant: Richtek Technology Corporation
Inventor： Shei-Chie Yang , Yuan-Yen Mai , Pao-Hsun Yu , Cheng-Hung Hsu
Abstract: A buck-boost switching regulator includes: a power switch circuit including an input switch unit and an output switch unit; a bypass control circuit configured to operably generate a bypass control signal according to a conversion voltage difference between an input voltage of an input power and an output voltage of an output power and according to whether an inductor current flowing through an inductor reaches an output current of the output power; and a bypass switch circuit, wherein when the conversion voltage difference is below a reference voltage and when the inductor current flowing through the inductor reaches the output current, the bypass control signal controls the bypass switch circuit to electrically connect the input power with the output power, so that the buck-boost switching regulator operates in a bypass mode.
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Patent Agency Ranking
公开(公告)号：US20240072667A1
公开(公告)日：2024-02-29
申请号：US18358037
申请日：2023-07-25
Applicant: Richtek Technology Corporation
Inventor： Pao-Hsun Yu , Shei-Chie Yang , Yuan-Yen Mai , Cheng-Hung Hsu
Abstract: A switching regulator includes a boost power stage circuit and a control circuit. The boost power stage circuit includes: at least one power switch configured to switch a terminal of an inductor according to an operation signal during a normal operation period, such that the terminal of the inductor is switched between an output voltage and ground level; and a power line switch connected in series to the inductor between the input voltage and the output voltage. The power line switch is turned OFF when the output voltage is short to ground level, to prevent a short current from flowing from input voltage to ground level. The control circuit generates the operation signal according to the output voltage and determines whether the power line switch is P-type or N-type MOS device, so as to turn OFF the power line switch when the output voltage is short to ground level.
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公开(公告)号：US11736013B2
公开(公告)日：2023-08-22
申请号：US17566678
申请日：2021-12-30
Applicant: Richtek Technology Corporation
Inventor： Shei-Chie Yang , Jian-Yu Tu , Yuan-Yen Mai , Pao-Hsun Yu
CPC classification number: H02M3/1582 , H02M1/009
Abstract: A buck-boost switching regulator includes: a power switch circuit including an input switch unit and an output switch unit which switch a first terminal and a second terminal of an inductor for buck-boost conversion; at least one low dropout regulator correspondingly coupled to at least one output high side switch in the output switch unit to correspondingly convert at least one low dropout voltage into at least one output voltage; and a bypass control circuit configured to operably generate a bypass control signal according to a conversion voltage difference between the input voltage and the corresponding low dropout voltage; wherein when the corresponding conversion voltage difference is lower than a reference voltage, the bypass control signal controls a corresponding bypass switch to electrically connect the input voltage with the corresponding low dropout node.
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4.发明公开公开(公告)号：US20230216410A1
公开(公告)日：2023-07-06
申请号：US18146493
申请日：2022-12-27
Applicant: Richtek Technology Corporation
Inventor： Shei-Chie Yang , Yuan-Yen Mai , Pao-Hsun Yu , Cheng-Hung Hsu
CPC classification number: H02M3/1582 , H02M1/0054
Abstract: A buck-boost switching regulator includes: a power switch circuit including an input switch unit and an output switch unit; a bypass control circuit configured to operably generate a bypass control signal according to a conversion voltage difference between an input voltage of an input power and an output voltage of an output power and according to whether an inductor current flowing through an inductor reaches an output current of the output power; and a bypass switch circuit, wherein when the conversion voltage difference is below a reference voltage and when the inductor current flowing through the inductor reaches the output current, the bypass control signal controls the bypass switch circuit to electrically connect the input power with the output power, so that the buck-boost switching regulator operates in a bypass mode.
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公开(公告)号：US20220224233A1
公开(公告)日：2022-07-14
申请号：US17566678
申请日：2021-12-30
Applicant: Richtek Technology Corporation
Inventor： Shei-Chie Yang , Jian-Yu Tu , Yuan-Yen Mai , Pao-Hsun Yu
Abstract: A buck-boost switching regulator includes: a power switch circuit including an input switch unit and an output switch unit which switch a first terminal and a second terminal of an inductor for buck-boost conversion; at least one low dropout regulator correspondingly coupled to at least one output high side switch in the output switch unit to correspondingly convert at least one low dropout voltage into at least one output voltage; and a bypass control circuit configured to operably generate a bypass control signal according to a conversion voltage difference between the input voltage and the corresponding low dropout voltage; wherein when the corresponding conversion voltage difference is lower than a reference voltage, the bypass control signal controls a corresponding bypass switch to electrically connect the input voltage with the corresponding low dropout node.
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6.发明授权公开(公告)号：US08786213B2
公开(公告)日：2014-07-22
申请号：US13706219
申请日：2012-12-05
Applicant: Richtek Technology Corporation
Inventor： Shei-Chie Yang , Shui-Mu Lin , Jun-Sheng Cheng , Ming-Yu Lin , Chun-I Lin
IPC: H05B37/02
CPC classification number: H05B37/02 , H05B33/0848
Abstract: LED dimming control circuit and method compensate LED current or LED average current by LED characteristics to improve dimming efficiency and performance. LED characteristic related look-up tables are stored to provide compensation values, and input LED current setting information is compensated by the compensation values to generate corrected LED current setting information for determining LED brightness.
Abstract translation: LED调光控制电路和方法通过LED特性补偿LED电流或LED平均电流，提高调光效率和性能。 存储LED特征相关查找表以提供补偿值，并且通过补偿值补偿输入LED电流设置信息，以产生用于确定LED亮度的校正LED电流设置信息。
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