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61.发明授权公开(公告)号：US10998416B2
公开(公告)日：2021-05-04
申请号：US16411318
申请日：2019-05-14
发明人： Budong You , Hui Yu , Meng Wang , Yicheng Du , Chuan Peng , Xunyi Song
IPC分类号： H01L29/66 , H01L29/49 , H01L21/265 , H01L21/762 , H01L29/06 , H01L29/08 , H01L29/10 , H01L29/40 , H01L29/423 , H01L29/78
摘要： A laterally diffused metal oxide semiconductor device can include: a well region having a second doping type; a reduced surface field effect layer of a first doping type formed by an implantation process in a predetermined region of the well region, where a length of the reduced surface field effect layer is less than a length of the well region; a body region of the first doping type extending from a top surface of the well region into the well region; a drain portion of the second doping type extending from the top surface of the well region into the well region; and an insulating structure located between the body region and the drain portion, at least a portion of the insulating structure is located on the top surface of the well region.
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62.发明授权公开(公告)号：US10958178B2
公开(公告)日：2021-03-23
申请号：US15966671
申请日：2018-04-30
发明人： Huiqiang Chen , Jianxin Wang
摘要： The disclosure relates to a control circuit, a control method and a flyback converter of primary-side feedback control including the control circuit. When an input voltage is greater than a predetermined threshold, a peak value of an input current of the flyback converter is controlled to vary with the input voltage by the switching control signal. When the input voltage is less than the predetermined threshold, the peak value of the input current is controlled to be increased by the switching control signal to make demagnetization time of a secondary winding of the flyback converter be greater than a minimum time. Thus, the peak value of the primary-side current may not become too small because of a decreased input voltage, further avoiding occurrence of an error sampling after a blanking time due to excessive variations in demagnetization time.
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公开(公告)号：US10951050B2
公开(公告)日：2021-03-16
申请号：US16122467
申请日：2018-09-05
发明人： Shuai Cheng
IPC分类号： H02J7/00
摘要： An adaptive charger can include: a power converter configured to receive an input current from an external power supply, and to generate an output current as a charging current to a load; a current feedback loop configured to compare a first detection signal that represents the input current against a first current reference signal, and to generate a first error signal, where the power converter is configured to regulate the input current according to the first error signal; and the current feedback loop being configured to determine an overload state of the external power supply according to an input voltage of the power converter, where the charger is configured to enter a current limit state when the external power supply is determined to be in the overload state, and where the first current reference signal is gradually reduced until the external power supply recovers to a non-overloaded state.
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公开(公告)号：US20210068231A1
公开(公告)日：2021-03-04
申请号：US17097428
申请日：2020-11-13
发明人： Hao CHEN
摘要： A current source circuit and an LED driving circuit applying the same. A current at an output terminal of an operational transconductance amplifier is shunted based on a first control signal that includes duty cycle information, or an input signal at at least one input terminal of the operational transconductance amplifier is controlled to be switched between different voltage signals based on the first control signal, so as to adjust an output current of a current adjustment circuit. A driving voltage for driving a current generation circuit is adjusted based on the output current. Thereby, a driving current generated by the current source circuit is correlated with the duty cycle information. An amplitude modulation circuit used, a low-pass filter and the like for processing the first control signal are not used, effectively simplifying circuit design and improving system efficiency.
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65.发明授权公开(公告)号：US10903387B2
公开(公告)日：2021-01-26
申请号：US16265885
申请日：2019-02-01
发明人： Suyi Lin
摘要： There are provided an optical sensing assembly, a method for manufacturing an optical sensing assembly, and an optical sensing system. In the optical sensing assembly, a light emitting surface of a light emitting element is arranged in nonparallel to a light receiving surface of a light sensing element. Further, the optical sensing system is formed by the optical sensing assembly and a light guide assembly. Therefore, a distance between light emitted by the light emitting element to a to-be-detected object and light received by the light sensing element is increased, so that optical crosstalk can be greatly suppressed even if the optical sensing assembly has a small size, thereby improving distance detection accuracy.
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公开(公告)号：US10886854B2
公开(公告)日：2021-01-05
申请号：US15670642
申请日：2017-08-07
发明人： Qiukai Huang , Xiaoru Xu
摘要： A control circuit can include: a power supply circuit having a bias capacitor coupled between a power terminal and a common node, where the power supply circuit supplies power to the control circuit via the bias capacitor; a detection circuit coupled between the common node and a current output terminal of a main power switch of a power stage circuit, to detect current flowing through the main power switch; a current feedback circuit that generates a feedback signal according to a difference value between a sense value obtained from a voltage at the power terminal during an off state of the main power switch and a present voltage at the power terminal, where the feedback signal represents an inductor current of the power stage circuit; and a control signal generator that generates a control signal according to the feedback signal to control the main power switch.
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公开(公告)号：US20200379496A1
公开(公告)日：2020-12-03
申请号：US16882614
申请日：2020-05-25
发明人： Zhaofeng Wang , Xiaodong Huang , Chen Zhao
摘要： A power factor correction circuit includes a power meter configured to measure a total harmonic distortion (THD) at an input port; a switching-type regulator that is controllable by a switch control signal in order to adjust a power factor; and a controller configured to generate the switch control signal to control the switching-type regulator to perform power factor correction, where the controller adjusts an on-time of a main switch of the switching-type regulator based on the measured THD to decrease the THD.
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公开(公告)号：US10827583B2
公开(公告)日：2020-11-03
申请号：US16356013
申请日：2019-03-18
发明人： Longqi Wang , Jianxin Wang
摘要： An apparatus for an LED driver with a silicon-controlled dimmer, can include: a bleeder circuit coupled to a DC bus of the LED driver, and being configured to draw a bleeder current from the DC bus; and a controller configured to adjust the bleeder current to decrease in accordance with a first current sampling signal that represents a drive current flowing through an LED load after the silicon-controlled dimmer transitions from an off state to an on state. A method of controlling an LED driver can include: drawing a bleeder current from a DC bus of the LED driver; and controlling the bleeder current in accordance with a first current sampling signal representing a drive current flowing through an LED load to decrease after the silicon-controlled dimmer transitions from an off state to an on state.
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公开(公告)号：US20200344857A1
公开(公告)日：2020-10-29
申请号：US16851409
申请日：2020-04-17
发明人： Hao Chen , Jianxin Wang , Huiqiang Chen , Zhishuo Wang
IPC分类号： H05B45/325 , H05B33/08 , H05B45/48
摘要： A current drive circuit applied in an LED drive circuit that is compatible with a triac dimmer and is configured to generate a direct current bus voltage includes: a current generation circuit configured to receive the direct current bus voltage, and to generate a drive current based on a PWM dimming signal, in order to drive an LED load; and an input current regulation circuit configured to generate a regulation signal based on a duty cycle of the PWM dimming signal, in order to control an operation state of the triac dimmer.
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公开(公告)号：US20200295572A1
公开(公告)日：2020-09-17
申请号：US16809750
申请日：2020-03-05
发明人： Kaiwei Yao , Zhiyuan Shen
摘要： An apparatus for photovoltaic power generation can include: an inverter; and at least one photovoltaic optimizer, where input terminals of each photovoltaic optimizer are coupled to output terminals of a photovoltaic panel, and output terminals of each photovoltaic optimizer are coupled in series with each other between input terminals of the inverter; where a maximum power point of the photovoltaic panel is tracked in accordance with an input voltage of the inverter when the photovoltaic optimizer operates in a first mode; and the maximum power point of the photovoltaic panel is tracked in accordance with an output voltage of the photovoltaic panel when the photovoltaic optimizer operates in a second mode.
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