Patents by Inventor Jianzhang XIE

Jianzhang XIE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230353037
    Abstract: A converter system includes a first switch and a controller configured to switch the first switch between first and second states based on input and output voltages of the converter system. The controller includes: a timer unit including a first timer configured to determine a first duration based on a target switching frequency of the converter system; and a second timer configured to determine a second duration based on a predetermined duration equal to or greater than a minimum duration of the first state of the first switch and the input and output voltages; and a control logic unit configured to switch the first switch from the second state to the first state responsive to expiration of both the first and second durations.
    Type: Application
    Filed: July 12, 2023
    Publication date: November 2, 2023
    Inventors: Wei Zhao, Jianzhang Xie
  • Patent number: 11750078
    Abstract: A converter system includes a first switch and a controller configured to switch the first switch between first and second states based on input and output voltages of the converter system, wherein the controller includes: a timer unit including a first timer configured to determine a first duration based on a target switching frequency of the converter system, and a second timer configured to determine a second duration based on a predetermined duration equal to or greater than a minimum duration of the first state of the first switch and the input and output voltages; and a control logic unit, configured to switch the first switch from the second state to the first state upon expiration of both the first and second durations.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: September 5, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Wei Zhao, Jianzhang Xie
  • Patent number: 11418119
    Abstract: Aspects of the disclosure provide for a circuit. In some examples, the circuit includes a timing circuit and a state machine circuit. The timing circuit determines a relationship between a duty cycle of a power converter and a threshold value. The state machine circuit is coupled to the timing circuit and includes a plurality of states including a buck state, a boost state, and a buck-boost state. The state machine circuit transitions among the plurality of states according to time domain control and voltage domain control, based at least partially on the determined relationship between the duty cycle and the threshold value, transitions among the states according to the time domain control when the time domain control indicates an exit from the buck-boost state, and transitions among the states according to the voltage domain control when the voltage domain control indicates the exit from a buck-boost state.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: August 16, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Jianzhang Xie, Wei Zhao, Yihan Yao, Yue Wu
  • Patent number: 11394287
    Abstract: A system includes an input voltage node configured to provide an input voltage (VIN). The system also includes a load (RLOAD) and a switching converter coupled between the input voltage node and the load (RLOAD). The switching converter is configured to provide an output voltage (VOUT) to the load (RLOAD) based on the input voltage (VIN). The switching converter includes gate driver circuitry and a current mode control circuit coupled to the gate driver circuitry. The current mode control circuit is configured to output control signals to the gate driver circuitry in accordance with different modes of operation, wherein the current mode control circuit is configured to adjust a threshold (IPSM*) used to switch between a discontinuous conduction mode (DCM) and a power save mode (PSM).
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: July 19, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Wei Zhao, Jianzhang Xie, Yihan Yao, Xufeng Wu
  • Patent number: 11362584
    Abstract: Aspects of the disclosure provide for a circuit. In some examples, the circuit includes a first charging path including a first capacitor coupled to a first output node. The circuit further includes a second charging path comprising a first switch and a second capacitor. The circuit further includes a third charging path comprising a second switch and a third capacitor. The circuit further includes a first discharging path comprising the second capacitor, a third switch coupled between the second charging path and a second output node, and a fourth switch coupled between the second charging path and a fourth node. The circuit further includes a second discharging path comprising the third capacitor, a fifth switch coupled between the third charging path and the second output node, and a sixth switch coupled between the third node and the fourth node.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: June 14, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Wei Zhao, Jianzhang Xie
  • Publication number: 20210211047
    Abstract: A converter system includes a first switch and a controller configured to switch the first switch between first and second states based on input and output voltages of the converter system, wherein the controller includes: a timer unit including a first timer configured to determine a first duration based on a target switching frequency of the converter system, and a second timer configured to determine a second duration based on a predetermined duration equal to or greater than a minimum duration of the first state of the first switch and the input and output voltages; and a control logic unit, configured to switch the first switch from the second state to the first state upon expiration of both the first and second durations.
    Type: Application
    Filed: May 18, 2020
    Publication date: July 8, 2021
    Inventors: Wei Zhao, Jianzhang Xie
  • Publication number: 20210211052
    Abstract: A system includes an input voltage node configured to provide an input voltage (VIN). The system also includes a load (RLOAD) and a switching converter coupled between the input voltage node and the load (RLOAD). The switching converter is configured to provide an output voltage (VOUT) to the load (RLOAD) based on the input voltage (VIN). The switching converter includes gate driver circuitry and a current mode control circuit coupled to the gate driver circuitry. The current mode control circuit is configured to output control signals to the gate driver circuitry in accordance with different modes of operation, wherein the current mode control circuit is configured to adjust a threshold (IPSM*) used to switch between a discontinuous conduction mode (DCM) and a power save mode (PSM).
    Type: Application
    Filed: May 19, 2020
    Publication date: July 8, 2021
    Inventors: Wei ZHAO, Jianzhang XIE, Yihan Yao, Xufeng Wu
  • Publication number: 20200373841
    Abstract: Aspects of the disclosure provide for a circuit. In some examples, the circuit includes a timing circuit and a state machine circuit. The timing circuit determines a relationship between a duty cycle of a power converter and a threshold value. The state machine circuit is coupled to the timing circuit and includes a plurality of states including a buck state, a boost state, and a buck-boost state. The state machine circuit transitions among the plurality of states according to time domain control and voltage domain control, based at least partially on the determined relationship between the duty cycle and the threshold value, transitions among the states according to the time domain control when the time domain control indicates an exit from the buck-boost state, and transitions among the states according to the voltage domain control when the voltage domain control indicates the exit from a buck-boost state.
    Type: Application
    Filed: February 18, 2020
    Publication date: November 26, 2020
    Inventors: Jianzhang XIE, Wei ZHAO, Yihan YAO, Yue WU
  • Publication number: 20200266702
    Abstract: Aspects of the disclosure provide for a circuit. In some examples, the circuit includes a first charging path including a first capacitor coupled to a first output node. The circuit further includes a second charging path comprising a first switch and a second capacitor. The circuit further includes a third charging path comprising a second switch and a third capacitor. The circuit further includes a first discharging path comprising the second capacitor, a third switch coupled between the second charging path and a second output node, and a fourth switch coupled between the second charging path and a fourth node. The circuit further includes a second discharging path comprising the third capacitor, a fifth switch coupled between the third charging path and the second output node, and a sixth switch coupled between the third node and the fourth node.
    Type: Application
    Filed: December 11, 2019
    Publication date: August 20, 2020
    Inventors: Wei ZHAO, Jianzhang XIE
  • Patent number: 10666144
    Abstract: A DC-DC converter controller includes a transistor driver, a flip-flop, a comparator, an integrator circuit, a switch, and a pulse generator circuit. The flip-flop includes an output coupled to an input of the transistor driver. The comparator includes an output coupled an input of the flip-flop. The integrator circuit includes an output coupled to an input of the comparator. The switch includes a first terminal coupled to the output of the integrator circuit, and a second terminal coupled to ground. The pulse generator circuit includes an input coupled to an output of the transistor driver, and an output coupled to a third terminal of the switch.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: May 26, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Linghan Xie, Jianzhang Xie, Wei Zhao, Weicheng Zhang
  • Patent number: 10020733
    Abstract: A DC-to-DC converter includes an input voltage node, an inductor, and a switch coupled to the inductor and the input voltage node. More specifically, the switch has an on state and off state, wherein during the on state, current flowing through the inductor increases and the off state results in a decrease of the current flowing through the inductor via a driver coupled to the switch. The driver comprises a plurality of transistors and an adaptive voltage node, wherein a voltage level at the adaptive voltage node is to vary in accordance with the current flowing through the inductor so as to decrease a variation of the amount of time to turn off the switch.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: July 10, 2018
    Assignee: Texas Instruments Incorporated
    Inventor: Jianzhang Xie
  • Publication number: 20170324327
    Abstract: A DC-to-DC converter includes an input voltage node, an inductor, and a switch coupled to the inductor and the input voltage node. More specifically, the switch has an on state and off state, wherein during the on state, current flowing through the inductor increases and the off state results in a decrease of the current flowing through the inductor via a driver coupled to the switch. The driver comprises a plurality of transistors and an adaptive voltage node, wherein a voltage level at the adaptive voltage node is to vary in accordance with the current flowing through the inductor so as to decrease a variation of the amount of time to turn off the switch.
    Type: Application
    Filed: April 20, 2017
    Publication date: November 9, 2017
    Inventor: Jianzhang Xie
  • Patent number: 9660528
    Abstract: A DC-to-DC converter includes an input voltage node, an inductor, and a switch coupled to the inductor and the input voltage node. More specifically, the switch has an on state and off state, wherein during the on state, current flowing through the inductor increases and the off state results in a decrease of the current flowing through the inductor via a driver coupled to the switch. The driver comprises a plurality of transistors and an adaptive voltage node, wherein a voltage level at the adaptive voltage node is to vary in accordance with the current flowing through the inductor so as to decrease a variation of the amount of time to turn off the switch.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: May 23, 2017
    Assignee: Texas Instruments Incorporated
    Inventor: Jianzhang Xie
  • Publication number: 20160118889
    Abstract: A DC-to-DC converter includes an input voltage node, an inductor, and a switch coupled to the inductor and the input voltage node. More specifically, the switch has an on state and off state, wherein during the on state, current flowing through the inductor increases and the off state results in a decrease of the current flowing through the inductor via a driver coupled to the switch. The driver comprises a plurality of transistors and an adaptive voltage node, wherein a voltage level at the adaptive voltage node is to vary in accordance with the current flowing through the inductor so as to decrease a variation of the amount of time to turn off the switch.
    Type: Application
    Filed: February 25, 2015
    Publication date: April 28, 2016
    Inventor: Jianzhang XIE