Patents Assigned to Silergy Semiconductor Technology (Hangzhou) Ltd.
  • Switching circuit, synchronous rectification control circuit and control method thereof
    Patent number: 11190108
    Abstract: A synchronous rectification control circuit for controlling a switching circuit comprising a synchronous rectifier switch, can include: a drive circuit configured to generate a drive signal to control switching states of the synchronous rectifier switch; and a voltage regulation circuit configured to control the drive circuit to adjust an amplitude of the drive signal to decrease to a preset threshold in an adjustment state when a drain-source voltage of the synchronous rectifier switch is greater than an adjustment threshold before the synchronous rectifier switch is turned off, where a time that the voltage regulation circuit is in the adjustment state is an adjustment time.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: November 30, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qiao Zhang, Xinlei Li
  • Sensing system, electronic device and sensing method for sensing ambient light
    Patent number: 11187577
    Abstract: A method of sensing ambient light intensity of an ambient in which an electronic device is located, can include: providing a plurality of light sensing elements under a display screen of the electronic device; displaying a solid color image during an operating period of the display screen; obtaining first data of each of the plurality of light sensing elements in response to a current ambient light during the display screen displaying the solid color image; obtaining second data of each of the plurality of light sensing elements in response to the current ambient light during the display screen displaying a normal image; and performing mathematical operations on the first data and the second data to obtain an intensity value of the ambient light of the ambient in which the electronic device is located.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: November 30, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Suyi Lin
  • Series resonant converter, primary feedback control circuit and control method thereof
    Patent number: 11172554
    Abstract: A primary feedback control circuit of a series resonant converter having a transformer, can include: an excitation current simulation circuit configured to sample an excitation voltage of the transformer, and to generate a first voltage representing an excitation current of the transformer; and a feedback control circuit configured to control on and off states of power switches of the series resonant converter in accordance with the first voltage and a second voltage representing a resonant current of the series resonant converter, where the first voltage is controlled to be equal to the second voltage when a secondary current of the transformer is zero.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: November 9, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jian Deng, Chen Zhao
  • Resonant contactless power supply equipment, electrical transmitter and contactless power supply method
    Patent number: 11159051
    Abstract: A resonant contactless electric energy transmitter configured to contactlessly supply electric energy to an electric energy receiver, can include: (i) a high frequency power supply configured to generate a high frequency AC power with a frequency that is the same as a leakage inductance resonant frequency, where the leakage resonant frequency is obtained by detection of an output current of the high frequency power supply that corresponds to the high frequency AC power of a sequence of different frequencies during a frequency sweeping time period; and (ii) a transmitting resonant circuit comprising a transmitting coil, and being configured to receive the high frequency AC power from the high frequency power supply.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: October 26, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Feng Yu, Wang Zhang
  • Data forwarding method and node device for mesh network
    Patent number: 11146483
    Abstract: The disclosure relates to a data forwarding method and a node device for a mesh network. The mesh network comprises a plurality of nodes. At least one of the plurality of nodes is a relay node which forwards a data packet from a source node to a destination node. The method includes determining whether or not to forward the data packet in accordance with a type and a forwarding count value of the data package. The forwarding count value is changed in different manners in accordance with the type of the data packet when the data packet is forwarded. The data forwarding method decreases forwarding times of the data packets, reduces power consumption and increases efficiency of network communication.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: October 12, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Junjie Qiao
  • Switching converter, control circuit and control method thereof
    Patent number: 11147132
    Abstract: A method of controlling a switching converter having a plurality of interleaved parallel branches, can include controlling conduction phases of power switches of the plurality of interleaved parallel branches to be overlapped when a load changes from a light load to a heavy load, in order to improve dynamic response performance of the switching converter. A control circuit for a switching converter with a plurality of interleaved parallel branches, can control conduction phases of power switches of the interleaved parallel branches to be overlapped when a load changes from a light load to a heavy load, in order to improve dynamic response performance of the switching converter.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: October 12, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Fusong Huang, Kailang Hang
  • Control method and control circuit for switch in switching power supply
    Patent number: 11146162
    Abstract: A control circuit for driving a power switch in a switching power supply can include: a start-up transistor having a drain coupled to a drain of the power switch, and a source coupled to a drain voltage detecting circuit; a gate voltage detecting circuit configured to detect a gate voltage of the power switch, to compare the gate voltage against a first threshold voltage, and to change an on drive current and an off drive current in response thereto; and the drain voltage detecting circuit being configured to detect a drain voltage of the power switch, to compare the drain voltage against a second threshold voltage, and to change the on drive current and the off drive current in response thereto.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: October 12, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Shaobin Zhang, Le Li, Zhiliang Hu, Yongjiang Bai
  • Drive circuit, drive method and integrated circuit thereof
    Patent number: 11139735
    Abstract: A drive circuit for a switch capacitor converter having first, second, third, and fourth power switches connected in series, can include: first, second, third, and fourth drivers configured to respectively drive the first, second, third power, and fourth power switches according to control signals; a bootstrap power supply circuit comprising a bootstrap capacitor configured to supply power to the first, second, and third drivers in a time-sharing manner; and a power supply configured to supply power to the fourth driver and charge the bootstrap capacitor, where the fourth power switch is grounded.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: October 5, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Fuhua Deng
  • Power transmitting antenna and power transmitting device applying the same
    Patent number: 11139689
    Abstract: A power transmitting device for a contactless power supply, can include: a power transmitting antenna having a plurality of transmitting coils; where each of the plurality of transmitting coils comprises a coil turn or a plurality of concentric coil turns with a substantially coplanar setting and having a coil surface; where an axis of each of the plurality of transmitting coils is axially perpendicular to the power transmitting antenna; and where the axis of each of the plurality of transmitting coils forms a predetermined angle with respect to each other.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: October 5, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Chen Zhao, Tong Sun, Wang Zhang
  • Switched capacitor converter, current control circuit and current control method thereof
    Patent number: 11133742
    Abstract: A current control circuit can include: a current detection circuit configured to obtain a current detection signal for characterizing an output current of a switched capacitor converter, where the switched capacitor converter includes a plurality of first switch groups coupled between an input terminal and a ground, and where each first switch group comprises two switches coupled in series; and a voltage regulation circuit configured to regulate the output current by adjusting an equivalent impedance of the switched capacitor converter in accordance with the current detection signal.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: September 28, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Wang Zhang, Chen Zhao
  • High voltage PMOS (HVPMOS) transistor with a composite drift region and manufacture method thereof
    Patent number: 11133413
    Abstract: In one embodiment, method of making a high voltage PMOS (HVPMOS) transistor, can include: (i) providing a P-type substrate; (ii) implanting N-type dopants in the P-type substrate; (iii) dispersing the implanted N-type dopants in the P-type substrate to form a deep N-type well; (iv) implanting P-type dopants of different doping concentrations in the deep N-type well along a horizontal direction of the deep N-type well; and (v) dispersing the implanted P-type dopants to form a composite drift region having an increasing doping concentration and an increasing junction depth along the horizontal direction of the deep N-type well.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: September 28, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Chenggong Han
  • Laterally diffused metal oxide semiconductor device and method for manufacturing the same
    Patent number: 11121251
    Abstract: A laterally diffused metal oxide semiconductor device can include: a base layer; a source region and a drain region located in the base layer; a first dielectric layer located on a top surface of the base layer and adjacent to the source region; a voltage withstanding layer located on the top surface of the base layer and located between the first dielectric layer and the drain region; a first conductor at least partially located on the first dielectric layer; a second conductor at least partially located on the voltage withstanding layer; and a source electrode electrically connected to the source region, where the first and second conductors are spatially isolated, and the source electrode at least covers a space between the first and second conductors.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: September 14, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Budong You, Hui Yu, Meng Wang, Yicheng Du, Chuan Peng, Xianguo Huang
  • LED dimming control circuit, dimming control method and LED power system thereof
    Patent number: 11116058
    Abstract: An LED dimming control circuit can include: a detection circuit configured to receive a dimming control signal, and to generate a detection signal for characterizing a type of the dimming control signal; and a dimming signal generation circuit configured to generate a dimming signal according to the detection signal and the dimming control signal, where a duty cycle of the dimming signal corresponds to the dimming control signal. A dimming control method can include: receiving a dimming control signal; detecting a number of rising or falling edges of the dimming control signal within a period of time to generate a detection signal; and determining a type of the dimming control signal in accordance with the detection signal.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: September 7, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Longqi Wang, Qi'an Zeng
  • Power conversion system, photovoltaic optimizer and power tracking method thereof
    Patent number: 11114859
    Abstract: 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.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: September 7, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Kaiwei Yao, Zhiyuan Shen
  • AC-DC power converter
    Patent number: 11114931
    Abstract: An AC-DC power converter can include: a front-stage power circuit; a rear-stage power circuit configured to share one power switch as a main power switch with the front-stage power circuit, where the rear-stage power circuit is coupled to a load, and a first magnetic component of the front-stage power circuit and a second magnetic component of the rear-stage power circuit are not coupled in one conductive loop from a positive terminal of a DC input voltage to a negative terminal of the DC input voltage; and an energy storage capacitor coupled to the front-stage power circuit and the rear-stage power circuit, where a common node of the first and second magnetic components is directly coupled to the power switch.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: September 7, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qiukai Huang, Jian Deng
  • Power conversion circuit, inversion circuit, photovoltaic power system and control method
    Patent number: 11108241
    Abstract: A method of controlling a photovoltaic power system, can include: controlling a first current flowing through a connection line between an output terminal of a power conversion circuit and an input terminal of an inversion circuit according to a rapid shutdown signal; and controlling operation states of the power conversion circuit coupled to a photovoltaic panel in accordance with the first current, such that a voltage on the connection line meets preset requirements. A photovoltaic power system can include: an inversion circuit configured to be controlled to regulate a first current of an input line of the inversion circuit; and at least one power conversion circuit coupled in series with the input line, and being configured to transition among different operation states according to the first current.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: August 31, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Kaiwei Yao
  • Semiconductor device structure and method for manufacturing the same
    Patent number: 11088274
    Abstract: A semiconductor device structure can include: (i) a first semiconductor layer having dopants of a first type; (ii) a second semiconductor layer having the dopants of the first type on the first semiconductor layer, where the second semiconductor layer is lightly-doped relative to the first semiconductor layer; (iii) first and second column regions spaced from each other in the second semiconductor layer, where the second column region is arranged between two of the first column regions; and (iv) first and second first sub-column regions laterally arranged in the second column region, where a doping concentration of the first sub-column region decreases in a direction from the first column region to the second sub-column region, and where a doping concentration of the second sub-column region decreases in a direction from the first column region to the first sub-column region.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: August 10, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Zhongping Liao
  • Isolated converter with switched capacitors
    Patent number: 11088616
    Abstract: An isolated converter with switched capacitors can include: a first capacitor; a first group of switches coupled between two terminals of an input port, where the first group of switches is configured to selectively couple a first terminal of the first capacitor to one of a first terminal and a second terminal of the input port; a second group of switches coupled between two terminals of an output port, where the second group of switches is configured to selectively couple a second terminal of the first capacitor to one of a first terminal and a second terminal of the output port; and a second capacitor coupled between one of the first and second terminals of the input port and one of the first and second terminals of the output port.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: August 10, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Wang Zhang, Chen Zhao
  • Three-level DC-DC converter and voltage balancing circuit thereof
    Patent number: 11088631
    Abstract: A three-level DC-DC converter can include: first and second switches successively coupled between a first terminal of an input port and a middle terminal; third and fourth switches successively coupled between the middle terminal and a second terminal of the input port; a flying capacitor coupled between a common node of the first and second switches and a common node of the third and fourth switches; and a voltage balancing circuit configured to adjust a charge amount or a discharge amount of the flying capacitor based on an error signal characterizing an error between a voltage across the flying capacitor and a predetermined value, in order to maintain the voltage across the flying capacitor within a predetermined range, where the predetermined value is within the predetermined range.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: August 10, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Wang Zhang, Chen Zhao
  • Control method and control circuit for a boost converter
    Patent number: 11081953
    Abstract: A control circuit for a boost converter can include: a comparison circuit configured to compare an input voltage of the boost converter against an output voltage of the boost converter, and to generate first and second control signals; an option circuit configured to provide a third control signal generated by a drive circuit of the boost converter to a control terminal of a synchronous power transistor of the boost converter, in accordance with the first and second control signals, when the output voltage is greater than the input voltage; and the option circuit being configured to provide a DC voltage to the control terminal of the synchronous power transistor, in accordance with the first and second control signals, in order to provide a current path for an inductor current of the boost converter through the synchronous power transistor, when the output voltage is not greater than the input voltage.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: August 3, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Liangwei Sun