Patents Assigned to Silergy Semiconductor Technology (Hangzhou) Ltd.
  • Detection method, detection circuit, controller and switching power supply
    Patent number: 10886845
    Abstract: Detecting an output voltage of a switching power supply can include: acquiring a first branch current that changes with a first voltage at a first terminal of an inductor of the switching power supply; acquiring a second branch current that changes with a second voltage at a second terminal of the inductor; controlling the first and second branch currents to flow to a same detection terminal; and detecting the output voltage based on a first current flowing through the detection terminal during a first time period, and a second current flowing through the detection terminal during a second time period.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: January 5, 2021
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Bo Cai
  • LED drive circuit and method thereof
    Patent number: 10880967
    Abstract: An LED drive circuit can include: a transistor and an LED load coupled in series, and being configured to receive a direct current bus voltage, and to generate an input current; and a control circuit configured to generate a drive signal to control an operation state of the transistor to control a distribution range of the input current by controlling an amount of accumulated charge of the input current during a half power frequency period.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: December 29, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qingliang Zheng, Qiukai Huang, Jianxin Wang
  • Light-sensing apparatus and electronic device
    Patent number: 10879418
    Abstract: An apparatus disposed below a housing, the apparatus including: a light-sensing element having a light-sensing region, and being configured to sense light reaching the light-sensing region through a first light-transmitting region of the housing; and where when the energy of the light that reaches the light-sensing region is reduced relative to the energy of the light that is expected to reach the light-sensing region, the area of the light-sensing region located under the first light-transmitting region increases.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: December 29, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Suyi Lin
  • Power converter with a plurality of switching power stage circuits
    Patent number: 10879801
    Abstract: A power converter can include: first and second terminals; N A-type switching power stage circuits, each having a first energy storage element, where N is a positive integer, a first terminal of a first A-type switching power stage circuit in the N A-type switching power stage circuits is coupled to the first terminal of the power converter, and a second terminal of each of the N A-type switching power stage circuits is coupled to the second terminal of the power converter; one B-type switching power stage circuit; and N second energy storage elements, each being coupled to one of the N A-type switching power stage circuits, and the B-type switching power stage circuit is coupled between a terminal of one of the N second energy storage elements corresponding to the B-type switching power stage circuit and the second terminal of the power converter.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: December 29, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Wang Zhang, Chen Zhao
  • Code writing device, tire pressure monitoring unit and control method
    Patent number: 10870322
    Abstract: A tire pressure monitor can include: a pressure sensor configured to detect a gas pressure parameter of a tire; a wireless receiver configured to initially be in a sleep mode, and to receive a communication protocol wirelessly after being woken up from the sleep mode; and a microprocessor configured to wake up the wireless receiver according to the gas pressure parameter.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: December 22, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: ChiKang Liu
  • Current source circuit and LED driving circuit
    Patent number: 10869372
    Abstract: 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.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: December 15, 2020
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
    Inventor: Hao Chen
  • Detection circuit and detection method for a triac dimmer
    Patent number: 10863601
    Abstract: A detection circuit configured to detect the presence of a TRIAC dimmer for an LED driver, can include: a sampling circuit configured to receive a DC bus voltage, and to generate a voltage sampling signal that characterizes the DC bus voltage; and a detector configured to determine whether the LED driver is provided with the TRIAC dimmer in accordance with a duration of the voltage sampling signal being continuously greater than a first reference voltage.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: December 8, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Zhishuo Wang, Jianxin Wang
  • Driving circuit and driving method for driving light-emitting diode load
    Patent number: 10849201
    Abstract: Driving an LED load using a driving circuit includes controlling a power transistor coupled in series with the LED load to operate in a linear mode when an input voltage varying periodically is higher than a driving voltage for the LED load; adjusting a transistor current flowing through the power transistor based on a difference between the input voltage and the driving voltage, without calculating an error between an average current flowing through the LED load and a desired current; and where the transistor current is controlled to be decreased when the difference between the input voltage and the driving voltage is relatively large, in order to reduce a conduction loss of the power transistor, and to cause the average current flowing through the LED load to meet a predetermined requirement of driving the LED load.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: November 24, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qiukai Huang, Jianxin Wang, Huiqiang Chen
  • Isolated switched capacitor converter
    Patent number: 10840802
    Abstract: An isolated switched capacitor converter can include: first switches coupled in series between terminals of an input port, and being configured to selectively connect a first terminal of a first capacitor to a first or second terminal of the input port; second switches coupled in series between terminals of an output port, and being configured to selectively connect a second terminal of the first capacitor to a first or second terminal of the output port; third switches coupled in series between terminals of the input port, and being configured to selectively connect a first terminal of a second capacitor to the first or second terminal of the input port; and fourth switches coupled in series between terminals of the output port, and being configured to selectively connect a second terminal of the second capacitor to the first or second terminal of the output port.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: November 17, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Wang Zhang, Chen Zhao
  • Communication device
    Patent number: 10833413
    Abstract: A communication device comprises a plurality of antennas, a sensing unit, a plurality of radio frequency circuits, and a sensing module. The sensing unit is electrically connected to the ground through at least one grounding capacitor, and the sensing unit is further configured to isolate and be coupled to each antenna. Each the radio frequency circuit is electrically connected to the corresponding each antenna. The sensing module is electrically connected to the sensing unit through an inductor, wherein the sensing module is used to sense the distance between the sensing unit and an external object by the sensing unit, and the sensing module generates a distance signal according to the distance.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: November 10, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Yupang Chou, Chuohsun Sun
  • Power supply circuit and LED driving circuit
    Patent number: 10834793
    Abstract: A power supply circuit can include: a constant current control circuit configured to receive a first voltage and a first current from a power supply, and to generate a second voltage and a second current that are substantially constant; a shunt circuit, where when the second current is greater than the output current, the shunt current circuit is configured to shunt the second current, and when the second current is less than or equal to the output current, the shunt circuit stops operating; and an energy storage circuit, where when the second current is greater than the output current, the energy storage circuit is configured to store energy, and when the second current is less than or equal to the output current, the energy storage circuit is configured to release energy and provide power for the load together with the constant current control circuit.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: November 10, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Hongbin Lai, Jianxin Wang
  • Power converter, control circuit and control method for the same
    Patent number: 10826377
    Abstract: A power converter, a control circuit and a control method for the same. Ground references of a first controller and a second controller are different to isolate drive signals of a first transistor and a second transistor. Thus the first transistor and the second transistor are controlled to be switched between on and off alternatively to achieve power conversion. The circuit is simple in structure and easy to implement with a low cost. The ground reference of the first controller is an intermediate node of a bridge arm of the power converter, so as to facilitate sampling and acquiring a feedback signal, thereby achieving closed-loop control of the power converter.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: November 3, 2020
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
    Inventors: Jian Deng, Jin Jin
  • Switching converter, circuit and method for controlling the same
    Patent number: 10826380
    Abstract: A switching converter, a circuit for controlling the same and a method for controlling the same. A ripple signal correlated to an input voltage and an on-off state of a power switch of the switching converter is superimposed on a feedback signal of an output voltage, so as to achieve closed-loop control of the output voltage. A dynamic response speed of the switching converter in case of a change of the input voltage is improved, while a switching frequency is kept constant.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: November 3, 2020
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
    Inventor: Xiaoling Zhang
  • LED driver with silicon controlled dimmer, apparatus and control method thereof
    Patent number: 10827583
    Abstract: 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.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: November 3, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Longqi Wang, Jianxin Wang
  • Power supply device, integrated circuit, energy transmitter and impedance matching method
    Patent number: 10819155
    Abstract: A resonance contactless power supply device can include: (i) a converter configured to convert an input power signal to an adjustable DC voltage; (ii) an inverter configured to receive the adjustable DC voltage, and to generate an AC voltage with a leakage inductance resonance frequency; (iii) a first resonance circuit having a transmitting coil, and being configured to receive the AC voltage from the inverter; (iv) a second resonance circuit comprising a receiving coil that is contactlessly coupled to the transmitting coil, where the second resonance circuit is configured to receive electric energy from the transmitting coil; and (v) a control circuit configured to control the adjustable DC voltage according to a phase difference between the AC voltage and an AC current output by the inverter, such that the phase difference is maintained as a predetermined angle.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: October 27, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Feng Yu, Chen Zhao
  • Power factor correction circuit, control method and controller
    Patent number: 10819224
    Abstract: A power factor correction circuit can include: a power meter configured to measure a power factor at an input port; a switching-type regulator that is controllable by a switching control signal in order to adjust the power factor of an input AC power; an EMI filter disposed between the switching-type regulator and the input port; and a controller configured to generate the switching control signal to maximize the power factor by adjusting a current reference signal according to a measured power factor, where the current reference signal represents an expected inductor current of the switching-type regulator.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: October 27, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Chen Zhao, Zhaofeng Wang, Xiaodong Huang
  • Secondary-side control circuit, control method and flyback converter thereof
    Patent number: 10819211
    Abstract: A method of controlling a secondary-side rectifier switch of a flyback converter, can include: detecting a slope parameter of a secondary-side detection voltage along a predetermined direction, where the secondary-side detection voltage is configured to represent a voltage across a secondary winding of the flyback converter; and controlling the secondary-side rectifier switch to turn on when the slope parameter is greater than a slope parameter threshold, and a relationship between the secondary-side detection voltage and the ON threshold meets a predetermined requirement.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: October 27, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Xiaoyu Yang, Zhiliang Hu, Yongjiang Bai
  • Motor drive device, control method and motor
    Patent number: 10812006
    Abstract: A motor drive device can include: a control circuit configured to adjust each phase current of a three-phase inverter of a motor; where the phase current of the three-phase inverter rises from zero to a first threshold during a first time interval; and where the phase current is controlled to drop gradually from the first threshold to zero during a second time interval in order to increase the second time interval.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: October 20, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Xiaodong Huang, Lei Shen
  • Resonant switching converter
    Patent number: 10797605
    Abstract: A resonant switching converter can include: a multi-level generating circuit configured to generate a first voltage signal having at least two values, where the first voltage signal is zero in a first time interval, and is not zero and not greater than an input voltage of the resonant switching converter in a second time interval; and a resonant tank configured to multiplex at least two power transistors in the multi-level generating circuit, and to receive the first voltage signal to achieve resonant control.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: October 6, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Chiqing Fang, Kaiwei Yao, Chen Zhao
  • Integrated circuit, dimmable light-emitting diode driving circuit and driving method
    Patent number: 10791603
    Abstract: A method of controlling a dimmable LED driving circuit, can include: detecting a voltage across an electrolytic capacitor in the LED driving circuit; determining whether the voltage across the electrolytic capacitor is less than a predetermined value; and charging the electrolytic capacitor by an auxiliary circuit when the voltage across the electrolytic capacitor is less than the predetermined value, in order to reduce time required for the voltage across the electrolytic capacitor to rise to a start-up voltage of an LED load.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: September 29, 2020
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jianxin Wang, Guojia Liu