Patents by Inventor Zhishuo LI
Zhishuo LI 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).
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Patent number: 11671024Abstract: A switched mode power supply includes a power circuit and a control circuit coupled to the power circuit for regulating its output voltage. The control circuit is configured to generate a control signal for at least one power switch of the power circuit using a reference voltage, determine if a duty cycle of the control signal is within a defined range, sense one or more output parameters of the power circuit including the output voltage of the power circuit, and in response to determining the duty cycle of the control signal is outside the defined range, adjust the reference voltage to adjust the duty cycle of the control signal. The reference voltage is adjustable over time to thereby linearly adjust the output voltage of the power circuit. Other example switched mode power supplies, control circuits, and methods for regulating output voltages of switched mode power supplies are also disclosed.Type: GrantFiled: January 6, 2022Date of Patent: June 6, 2023Assignee: Astec International LimitedInventors: Lian Liang, Bing Zhang, Mei Qin, Wenyong Liu, Zhishuo Li
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Patent number: 11557917Abstract: A switched mode power supply comprises a communication interface including an address terminal configured to couple to an external resistor for setting a communication address of the switched mode power supply. A control circuit is configured to determine the value of the external resistor a first time with a first technique and set the communication address of the switched mode power supply based on the value of the external resistor determined using the first technique if the value of the external resistor is greater than the threshold value. The control circuit is also configured to, if the value of the external resistor is less than the threshold value, determine the value of the external resistor a second time with a second technique and set the communication address of the switched mode power supply based on the value of the external resistor determined using the second technique.Type: GrantFiled: March 4, 2021Date of Patent: January 17, 2023Assignee: Astec International LimitedInventors: Bing Zhang, Mei Qin, Lian Liang, Wenyong Liu, Zhishuo Li
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Publication number: 20220131473Abstract: A switched mode power supply includes a power circuit and a control circuit coupled to the power circuit for regulating its output voltage. The control circuit is configured to generate a control signal for at least one power switch of the power circuit using a reference voltage, determine if a duty cycle of the control signal is within a defined range, sense one or more output parameters of the power circuit including the output voltage of the power circuit, and in response to determining the duty cycle of the control signal is outside the defined range, adjust the reference voltage to adjust the duty cycle of the control signal. The reference voltage is adjustable over time to thereby linearly adjust the output voltage of the power circuit. Other example switched mode power supplies, control circuits, and methods for regulating output voltages of switched mode power supplies are also disclosed.Type: ApplicationFiled: January 6, 2022Publication date: April 28, 2022Inventors: Lian Liang, Bing Zhang, Mei Qin, Wenyong Liu, Zhishuo Li
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Patent number: 11223289Abstract: A switched mode power supply includes a power circuit and a control circuit coupled to the power circuit for regulating its output voltage. The control circuit is configured to generate a control signal for at least one power switch of the power circuit using a reference voltage, determine if a duty cycle of the control signal is within a defined range, sense one or more output parameters of the power circuit including the output voltage of the power circuit, and in response to determining the duty cycle of the control signal is outside the defined range, adjust the reference voltage to adjust the duty cycle of the control signal. The reference voltage is adjustable over time to thereby linearly adjust the output voltage of the power circuit. Other example switched mode power supplies, control circuits, and methods for regulating output voltages of switched mode power supplies are also disclosed.Type: GrantFiled: January 17, 2020Date of Patent: January 11, 2022Assignee: Astec International LimitedInventors: Lian Liang, Bing Zhang, Mei Qin, Wenyong Liu, Zhishuo Li
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Publication number: 20210226543Abstract: A switched mode power supply includes a power circuit and a control circuit coupled to the power circuit for regulating its output voltage. The control circuit is configured to generate a control signal for at least one power switch of the power circuit using a reference voltage, determine if a duty cycle of the control signal is within a defined range, sense one or more output parameters of the power circuit including the output voltage of the power circuit, and in response to determining the duty cycle of the control signal is outside the defined range, adjust the reference voltage to adjust the duty cycle of the control signal. The reference voltage is adjustable over time to thereby linearly adjust the output voltage of the power circuit. Other example switched mode power supplies, control circuits, and methods for regulating output voltages of switched mode power supplies are also disclosed.Type: ApplicationFiled: January 17, 2020Publication date: July 22, 2021Inventors: Lian LIANG, Bing ZHANG, Mei QIN, Wenyong LIU, Zhishuo LI
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Publication number: 20210210980Abstract: A switched mode power supply comprises a communication interface including an address terminal configured to couple to an external resistor for setting a communication address of the switched mode power supply. A control circuit is configured to determine the value of the external resistor a first time with a first technique and set the communication address of the switched mode power supply based on the value of the external resistor determined using the first technique if the value of the external resistor is greater than the threshold value. The control circuit is also configured to, if the value of the external resistor is less than the threshold value, determine the value of the external resistor a second time with a second technique and set the communication address of the switched mode power supply based on the value of the external resistor determined using the second technique.Type: ApplicationFiled: March 4, 2021Publication date: July 8, 2021Applicant: Astec International LimitedInventors: Bing Zhang, Mei Qin, Lian Liang, Wenyong Liu, Zhishuo Li
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Patent number: 10958100Abstract: A switched mode power supply includes a communication interface and an address terminal for setting a communication address for the power supply using the resistance of an external resistor when the external resistor is coupled to the address terminal. The power supply is configured to determine a first resistance value for the external resistor using a first technique, determine a second resistance value for the external resistor using a second technique, set the communication address of the power supply using the first resistance value if the first resistance value is greater than a threshold value, and set the communication address of the power supply using the second resistance value if the first resistance value is less than the threshold value. Other example switched mode power supplies, power systems including one or more power supplies, and methods for setting a communication address of a power supply are also disclosed.Type: GrantFiled: December 3, 2018Date of Patent: March 23, 2021Assignee: Astec International LimitedInventors: Bing Zhang, Mei Qin, Lian Liang, Wenyong Liu, Zhishuo Li
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Patent number: 10804810Abstract: A switch-mode DC-DC power converter includes one or more input terminals for receiving an input voltage from a voltage source, one or more output terminals for supplying an output voltage to a load, and a transformer coupled between the input and output terminals. The transformer includes at least one primary winding and at least one secondary winding. The converter also includes a primary switch coupled to control current through the at least one primary winding, a synchronous rectifier coupled to control current through the at least one secondary winding, and means for controlling switching operation of the synchronous rectifier by disabling switching of the synchronous rectifier for a defined time delay in response to receiving an input signal indicative of a startup of the DC-DC power converter, and enabling switching of the synchronous rectifier after the defined time delay has elapsed.Type: GrantFiled: May 16, 2019Date of Patent: October 13, 2020Assignee: Astec International LimitedInventors: Jinying Zhang, Zhishuo Li, Huihui Lu, Yuandong He, Shoutang Cheng
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Publication number: 20200177024Abstract: A switched mode power supply includes a communication interface and an address terminal for setting a communication address for the power supply using the resistance of an external resistor when the external resistor is coupled to the address terminal. The power supply is configured to determine a first resistance value for the external resistor using a first technique, determine a second resistance value for the external resistor using a second technique, set the communication address of the power supply using the first resistance value if the first resistance value is greater than a threshold value, and set the communication address of the power supply using the second resistance value if the first resistance value is less than the threshold value. Other example switched mode power supplies, power systems including one or more power supplies, and methods for setting a communication address of a power supply are also disclosed.Type: ApplicationFiled: December 3, 2018Publication date: June 4, 2020Inventors: Bing ZHANG, Mei QIN, Lian LIANG, Wenyong LIU, Zhishuo LI
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Publication number: 20190356233Abstract: A switch-mode DC-DC power converter includes one or more input terminals for receiving an input voltage from a voltage source, one or more output terminals for supplying an output voltage to a load, and a transformer coupled between the input and output terminals. The transformer includes at least one primary winding and at least one secondary winding. The converter also includes a primary switch coupled to control current through the at least one primary winding, a synchronous rectifier coupled to control current through the at least one secondary winding, and means for controlling switching operation of the synchronous rectifier by disabling switching of the synchronous rectifier for a defined time delay in response to receiving an input signal indicative of a startup of the DC-DC power converter, and enabling switching of the synchronous rectifier after the defined time delay has elapsed.Type: ApplicationFiled: May 16, 2019Publication date: November 21, 2019Inventors: Jinying ZHANG, Zhishuo LI, Huihui LU, Yuandong HE, Shoutang CHENG