Patents Assigned to Silergy Semiconductor Technology (Hangzhou) Ltd.
  • Patent number: 12224663
    Abstract: A switched capacitor converter can include a plurality of input switch groups connected in series between an input terminal and an output terminal, where each input switch group can include two power switches connected in series. The switched capacitor converter can also include a plurality of output switch groups, where each output switch group can include two power switches connected in series. The switched capacitor converter can also include a plurality of capacitors, first terminals of which are respectively connected to the common nodes of every two series-connected power switches in the plurality of input switch groups, and second terminals of which are respectively connected to intermediate nodes of each output switch group. The switched capacitor converter can also include a plurality of inductors, where a first terminal of each output switch group can connect to a first terminal of a corresponding inductor.
    Type: Grant
    Filed: April 21, 2022
    Date of Patent: February 11, 2025
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Junyan Sun, Wang Zhang
  • Patent number: 12224675
    Abstract: A voltage detection circuit for a switching converter having a switch and a magnetic element connected in series, where a first terminal of the switch and a first terminal of the magnetic element are connected to a common node, the voltage detection circuit including: an average circuit configured to receive a first voltage across the switch, and to generate a second voltage representing an average value of the first voltage; and where the second voltage represents a voltage between a second terminal of the switch and a second terminal of the magnetic element in a steady state of the switching converter.
    Type: Grant
    Filed: May 18, 2022
    Date of Patent: February 11, 2025
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jiabin Chen, Hongxing Wang
  • Patent number: 12212223
    Abstract: A charging circuit can include: a first module having a plurality of power transistors, and being coupled between a first port and a reference ground; a second module having a plurality of power transistors, and being coupled between a second port and the reference ground; at least one inductor coupled between the first module and the second module; and where at least one of the first module and the second module forms a multi-level converter with the at least one inductor.
    Type: Grant
    Filed: November 14, 2022
    Date of Patent: January 28, 2025
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Siyuan Chen, Sihua Wen
  • Patent number: 12191773
    Abstract: A control circuit for a resonant converter having at least two output signals, the control circuit including: a charge feedback circuit configured to generate a charge feedback signal representing a resonant current of a resonant circuit in the resonant converter; and a switching control signal generating circuit configured to generate switching control signals according to the charge feedback signal and feedback signals representing error information of each of the at least two output signals.
    Type: Grant
    Filed: July 19, 2022
    Date of Patent: January 7, 2025
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jian Deng, Xiahe Zhang, Qiukai Huang
  • Patent number: 12184198
    Abstract: A control circuit for a switching power supply, can include: a sampling circuit configured to obtain an inductor current and a drain-source voltage of a main power transistor in a power stage circuit, in order to generate a sampling signal; where the control circuit generates an inductor current sampling signal according to the sampling signal during an on-period of the main power transistor; and where during an off-period of the main power transistor, the control circuit generates a zero-crossing signal of the inductor current and an overvoltage signal of an output voltage of the switching power supply according to the sampling signal.
    Type: Grant
    Filed: August 25, 2022
    Date of Patent: December 31, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Chaojun Chen
  • Patent number: 12170482
    Abstract: A control circuit for a switching converter, where: in a first operation state, the control circuit controls a switching period of the switching converter to remain unchanged, controls a turn-on time of a power transistor in the switching converter to be not less than a minimum turn-on time in each switching period, and controls a turn-off time of the power transistor to be not less than a minimum turn-off time; in a second operation state, the control circuit controls the turn-on time of the power transistor to be the minimum turn-on time in each switching period, and adjusts the switching period to further reduce a duty cycle; and in a third operation state, the control circuit controls the turn-off time of the power transistor to be the minimum turn-off time in each switching period, and adjusts the switching period to further increase the duty cycle.
    Type: Grant
    Filed: August 16, 2022
    Date of Patent: December 17, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Di Luo, Liangwei Sun
  • Patent number: 12166091
    Abstract: An LDMOS transistor can include: a field oxide layer structure adjacent to a drain region; and at least one drain oxide layer structure adjacent to the field oxide layer structure along a lateral direction, where a thickness of the drain oxide layer structure is less than a thickness of the field oxide layer, and at least one of a length of the field oxide layer structure and a length of the drain oxide layer structure is adjusted to improve a breakdown voltage performance of the LDMOS transistor.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: December 10, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Meng Wang, Hui Yu
  • Patent number: 12166607
    Abstract: A digital isolator can include: an encoding circuit configured to receive and encode an input digital signal, in order to generate an encoded signal, wherein a rising edge of the input digital signal is encoded as a first pulse sequence, and a falling edge of the input digital signal is encoded as a second pulse sequence; an isolation element coupled to the encoding circuit, and being configured to transmit the encoded signal in an electrically isolated manner; and a decoding circuit configured to receive the encoded signal through the isolation element, and to decode the encoded signal, in order to generate an output digital signal consistent with the input digital signal.
    Type: Grant
    Filed: January 13, 2023
    Date of Patent: December 10, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Yufei Dong, Xiaodong Huang, Ye Yuan, Chen Zhao
  • Patent number: 12143014
    Abstract: A voltage converter can include: an input end configured to receive an input voltage; an output end configured to generate an output voltage; N switched capacitor circuits sequentially coupled in series between the input end and the output end, where N is a positive integer greater than or equal to 2; where each switched capacitor circuit comprises a switch circuit and a flying capacitor, and at least the flying capacitor of an i-th switched capacitor circuit is configured as an output capacitor of an (i?1)-th switched capacitor circuit, where i is a positive integer that is greater than or equal to 2 and less than or equal to N; and a first energy storage element coupled to the output end.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: November 12, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Huiqiang Chen, Jianxin Wang
  • Patent number: 12132385
    Abstract: A control circuit for a resonant converter, can include: a feedforward circuit configured to generate a feedforward current; a charge feedback circuit configured to receive a resonant current sampling signal representing a resonant current of the resonant converter in a first mode to generate a charge feedback signal, and to receive the resonant current sampling signal and the feedforward current together to generate the charge feedback signal in a second mode; and a driving control circuit configured to generate driving signals according to the charge feedback signal and a first threshold signal, in order to control switching states of power transistors of the resonant converter, where the first threshold signal is generated according to an error compensation signal representing an error information between a feedback signal of an output signal of the resonant converter and a reference signal.
    Type: Grant
    Filed: July 20, 2022
    Date of Patent: October 29, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Chaojun Chen, Jian Deng, Jin Jin
  • Patent number: 12126256
    Abstract: A control circuit and an AC-DC power supply are provided. A ripple reference signal characterizing an industrial frequency ripple component of an output voltage is added to a reference voltage of a desired output voltage, so that a reference and a feedback voltage of the output voltage are almost the same at the industrial frequency band. In addition, a voltage compensation signal outputted by an error compensation circuit does not include the industrial frequency ripple component, and the voltage compensation signal without the industrial frequency ripple component does not affect a tracking reference of the current loop. Therefore, the loop can be designed without considering limit of the industrial frequency on a cut-off frequency of the loop, thereby effectively increasing the cut-off frequency of the loop and improving a dynamic response speed of the loop.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: October 22, 2024
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
    Inventors: Qiukai Huang, Jiandong Dai
  • Patent number: 12119343
    Abstract: A semiconductor structure can include: a semiconductor substrate having a first region, a second region, and an isolation region disposed between the first region and the second region; an isolation component located in the isolation region; and where the isolation component is configured to recombine first carriers flowing from the first region toward the second region, and to extract second carriers flowing from the second region toward the first region.
    Type: Grant
    Filed: August 11, 2022
    Date of Patent: October 15, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Yicheng Du, Meng Wang, Hui Yu
  • Patent number: 12107520
    Abstract: A driving circuit for driving a piezoelectric load, can include: an energy-storage capacitor; a first power stage circuit configured to convert an input voltage into a first voltage, and to store the first voltage in the energy-storage capacitor; a second power stage circuit configured to receive the first voltage to charge the piezoelectric load during a first operation interval of an operation period, such that a power supply voltage signal provided to the piezoelectric load in the first operation interval corresponds to a reference voltage in a first interval; and a discharging circuit configured to discharge the piezoelectric load during a second operation interval of the operation period, such that the power supply voltage signal in the second operation interval corresponds to the reference voltage in a second interval.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: October 1, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhiwei Xu, Chiqing Fang, Yunlong Han
  • Patent number: 12088190
    Abstract: A zero-voltage-switching control circuit for a switching power supply having a main power switch and a synchronous rectifier switch, is configured to: control the synchronous rectifier switch to be turned on for a first time period before the main power switch is turned on and after a current flowing through the synchronous rectifier switch is decreased to zero according to a switching operation of the main power switch in a previous switching period of the main power switch; and where a drain-source voltage of the main power switch is decreased when the main power switch is turned on, in order to reduce conduction loss.
    Type: Grant
    Filed: April 7, 2023
    Date of Patent: September 10, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jian Deng, Qiukai Huang
  • Patent number: 12081109
    Abstract: A control circuit for a switching converter having a main power switch and an auxiliary power switch, where the control circuit is configured to: charge and discharge a junction capacitor of the main power switch during a turn-off period of the main power switch; and adjust a conduction time of the auxiliary power switch according to a difference between the charged and discharged charge levels across the junction capacitor.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: September 3, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Hongbin Lai, Jianxin Wang
  • Patent number: 12082506
    Abstract: A driving circuit and a driving method are provided. The driving circuit includes an energy-storage capacitor, a charging circuit and a discharging circuit. The energy-storage capacitor is coupled between a piezoelectric load and the charging circuit. Operation states of the charging circuit and the discharging circuit are controlled, so that the charging circuit charges the energy-storage capacitor during a first operation interval of an operation period, to adjust a power supply voltage signal provided to the piezoelectric load to change with a reference voltage in a first interval, and at least the piezoelectric load discharges electricity through the discharging circuit during a second operation interval of the operation period, to adjust the power supply voltage signal to change with the reference voltage in a second interval. The driving circuit according to the present disclosure requires a few switches, thereby facilitating circuit integration.
    Type: Grant
    Filed: May 20, 2021
    Date of Patent: September 3, 2024
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY HANGZHOU LTD
    Inventors: Zhiwei Xu, Chiqing Fang, Chen Zhao
  • Patent number: 12080464
    Abstract: A laminated transformer can include: a plurality of magnetic layers; a plurality of coil layers including a primary coil having a first type of coil layer, and a secondary coil having a second type of coil layer, where each coil layer is laminated between a pair of the plurality of magnetic layers; and a plurality of non-magnetic layers, where a first of the plurality of non-magnetic layers is disposed between an adjacent pair of the coil layers in order to increase a coupling coefficient between the primary and secondary coils.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: September 3, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Ke Dai, Jian Wei, Jiajia Yan
  • Patent number: 12068683
    Abstract: A controller of a switching power supply can include: a frequency-jittering control circuit configured to generate a first frequency-jittering signal and a second frequency-jittering signal; where a jittering range of an operating frequency of a power transistor in the switching power supply is adjusted by the first frequency-jittering signal; and where a jittering amplitude of a peak value of an inductor current of the switching power supply is adjusted by the second frequency-jittering signal.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: August 20, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhan Chen, Jian Deng, Xiaoru Xu
  • Patent number: 12057781
    Abstract: A sampling circuit for a switching power supply, can include: a first sampling circuit configured to acquire a first sampling signal of a current flowing through an inductor in the switching power supply; and a second sampling circuit configured to obtain a compensation signal with a same rising slope as the first sampling signal within a turn-off delay time of a power switch in the switching power supply, and to superimpose the compensation signal on the first sampling signal to generate a second sampling signal.
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: August 6, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhan Chen, Jin Jin, Guiying Zhang, Hongxing Wang
  • Patent number: 12047003
    Abstract: A power converter can include: a plurality of circuit modules coupled in parallel between a first port and a second port, where each of the plurality of circuit modules includes a switching power stage circuit having a first magnetic element coupled between a switch node of the switching power stage circuit and a first terminal of the second port, at least one switch group having first and second transistors and being coupled between a first terminal of the first port and a first terminal of the switching power stage circuit, and at least one first energy storage capacitor for providing energy to a load of the power converter; and a plurality of second energy storage capacitors configured to periodically store energy and release energy to corresponding first energy storage capacitors.
    Type: Grant
    Filed: April 18, 2023
    Date of Patent: July 23, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Wang Zhang, Chen Zhao