Patents by Inventor Qiu Sha
Qiu Sha 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: 10848054Abstract: A switching power supply controller for a switching power supply is provided that measures an input voltage through an application of a load during an input voltage measurement period following connection of the switching power supply to an AC mains. Based upon the measured input voltage, the controller adjusts a start-up delay period so that the start-up delay period is substantially constant despite variations in an AC line voltage for the AC mains.Type: GrantFiled: November 6, 2018Date of Patent: November 24, 2020Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Jiang Yu, Guang Feng, Qiu Sha, Qifeng Shi, Jianming Yao
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Publication number: 20200144904Abstract: A switching power supply controller for a switching power supply is provided that measures an input voltage through an application of a load during an input voltage measurement period following connection of the switching power supply to an AC mains. Based upon the measured input voltage, the controller adjusts a start-up delay period so that the start-up delay period is substantially constant despite variations in an AC line voltage for the AC mains.Type: ApplicationFiled: November 6, 2018Publication date: May 7, 2020Inventors: Jiang Yu, Guang Feng, Qiu Sha, Qifeng Shi, Jianming Yao
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Patent number: 10483861Abstract: A flyback converter controller is provided with a single terminal through which the flyback converter controller senses for over-voltage faults for an input voltage and also senses for open circuit faults for an auxiliary winding. A first voltage divider provides a divided version of the input voltage to the single terminal. The controller compares a voltage for the single terminal to at least one over-voltage threshold to detect the over-voltage fault for the input voltage.Type: GrantFiled: August 31, 2018Date of Patent: November 19, 2019Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Guang Feng, Jiang Yu, Qifeng Shi, Qiu Sha, Xiaolin Gao, Yong Xiong Lin
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Patent number: 10281505Abstract: A voltage sensing circuit for a switching power converter includes a comparator having a comparator input stage that processes a voltage from a main DAC and a current from a tracking DAC.Type: GrantFiled: January 13, 2017Date of Patent: May 7, 2019Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Qiu Sha, Andrey Malinin, Qifeng Shi, Mingsheng Peng
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Patent number: 10170975Abstract: A controller for a switching power converter is provided with a single detection pin through which the controller monitors whether the switching power converter is connected to an AC mains. Should a voltage for the detection pin indicate that the switching power converter is disconnected from the AC mains, the controller asserts the detection pin voltage to trigger a bleeder circuit to discharge an X class capacitor.Type: GrantFiled: February 27, 2018Date of Patent: January 1, 2019Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Guang Feng, Qifeng Shi, Jiang Yu, Qiu Sha, Yong Xiong Lin
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Patent number: 10075063Abstract: A startup circuit is provided for establishing the Vcc voltage level of a switching power converter. The startup circuit uses a switch controller and path switching transistor to provide a two-stage Vcc capacitor charging that reduces startup time while avoiding short circuit damage through the alternate usage of a high impedance charging path and a low-impedance charging path.Type: GrantFiled: January 13, 2017Date of Patent: September 11, 2018Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Mingsheng Peng, Andrey Malinin, Pengju Kong, Qiu Sha, Guang Feng
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Publication number: 20180203047Abstract: A voltage sensing circuit for a switching power converter includes a comparator having a comparator input stage that processes a voltage from a main DAC and a current from a tracking DAC.Type: ApplicationFiled: January 13, 2017Publication date: July 19, 2018Inventors: Qiu Sha, Andrey Malinin, Qifeng Shi, Mingsheng Peng
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Publication number: 20180205312Abstract: A startup circuit is provided for establishing the Vcc voltage level of a switching power converter. The startup circuit uses a switch controller and path switching transistor to provide a two-stage Vcc capacitor charging that reduces startup time while avoiding short circuit damage through the alternate usage of a high impedance charging path and a low-impedance charging path.Type: ApplicationFiled: January 13, 2017Publication date: July 19, 2018Inventors: Mingsheng Peng, Andrey Malinin, Pengju Kong, Qiu Sha, Guang Feng
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Patent number: 9584031Abstract: Embodiments described herein describe a power supply configured to provide power to an output load via a power supply transformer. The power supply includes a controller configured to operate in a configuration state and an operating state. During the configuration state, the controller receives a configuration signal from a sense circuit coupled to the controller and selects one of a plurality of operating modes from the configuration signal. During the operating state, the controller controls a switch coupled to the transformer based on the selected operating mode and a sense signal received from the sense circuit representative of the power provided to the output load by the power supply. When the switch is closed, current flows from a power source through the transformer, and when the switch is open, current is prevented from flowing from the power source through the transformer.Type: GrantFiled: July 28, 2015Date of Patent: February 28, 2017Assignee: Dialog Semiconductor Inc.Inventors: Xiaolin Gao, Qiu Sha, Fuqiang Shi, Yong Li
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Patent number: 9559597Abstract: A power converter has a transformer including a primary winding coupled to an input voltage, a secondary winding coupled to an output of the power converter, and an auxiliary winding is configured to detect an open connection fault of the auxiliary winding. The power converter includes a current source coupled to the auxiliary winding that, when activated, supplies a current to the auxiliary winding. A controller measures a voltage across the auxiliary winding. Responsive to detecting an increase in the voltage across the auxiliary winding while the current source is activated, the controller disables the power converter.Type: GrantFiled: February 27, 2015Date of Patent: January 31, 2017Assignees: Dialog Semiconductor Inc., Dialog Semiconductor (UK) LimitedInventors: Andrey Malinin, Tino Lin, Jiandong Zhang, John Kesterson, Qiu Sha
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Publication number: 20160254753Abstract: A power converter has a transformer including a primary winding coupled to an input voltage, a secondary winding coupled to an output of the power converter, and an auxiliary winding is configured to detect an open connection fault of the auxiliary winding. The power converter includes a current source coupled to the auxiliary winding that, when activated, supplies a current to the auxiliary winding. A controller measures a voltage across the auxiliary winding. Responsive to detecting an increase in the voltage across the auxiliary winding while the current source is activated, the controller disables the power converter.Type: ApplicationFiled: February 27, 2015Publication date: September 1, 2016Inventors: Andrey Malinin, Tino Lin, Jiandong Zhang, John Kesterson, Qiu Sha
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Publication number: 20150333638Abstract: Embodiments described herein describe a power supply configured to provide power to an output load via a power supply transformer. The power supply includes a controller configured to operate in a configuration state and an operating state. During the configuration state, the controller receives a configuration signal from a sense circuit coupled to the controller and selects one of a plurality of operating modes from the configuration signal. During the operating state, the controller controls a switch coupled to the transformer based on the selected operating mode and a sense signal received from the sense circuit representative of the power provided to the output load by the power supply. When the switch is closed, current flows from a power source through the transformer, and when the switch is open, current is prevented from flowing from the power source through the transformer.Type: ApplicationFiled: July 28, 2015Publication date: November 19, 2015Inventors: Xiaolin Gao, Qiu Sha, Fuqiang Shi, Yong Li
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Patent number: 9124185Abstract: Embodiments described herein describe a power supply configured to provide power to an output load via a power supply transformer. The power supply includes a controller configured to operate in a configuration state and an operating state. During the configuration state, the controller receives a configuration signal from a sense circuit coupled to the controller and selects one of a plurality of operating modes from the configuration signal. During the operating state, the controller controls a switch coupled to the transformer based on the selected operating mode and a sense signal received from the sense circuit representative of the power provided to the output load by the power supply. When the switch is closed, current flows from a power source through the transformer, and when the switch is open, current is prevented from flowing from the power source through the transformer.Type: GrantFiled: July 8, 2013Date of Patent: September 1, 2015Assignee: Dialog Semiconductor Inc.Inventors: Xiaolin Gao, Qiu Sha, Fuqiang Shi, Yong Li
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Patent number: 9060408Abstract: Embodiments disclosed herein describe the use of a power supply to provide power to an LED load. The power supply provides a present output current to the LED, and receives a temperature signal representing the operating temperature of the LED. A target output current is determined, for instance based on the temperature signal. An output current rate of change is determined, and the power supply adjusts the output current to the LED at the determined rate of change until the output current is substantially equal to the target current.Type: GrantFiled: March 13, 2013Date of Patent: June 16, 2015Assignee: Dialog Semiconductor Inc.Inventors: Fuqiang Shi, Qiu Sha, Xiaolin Gao, Gordon Chen
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Patent number: 8988902Abstract: A controller integrated circuit (IC) for controlling a power converter uses one or more IC pins having plurality of functions such as configuration of a parameter supported by the controller IC and shutdown protection. Several different functions may be supported by a single IC pin, thereby reducing the number of pins required in the controller IC and also reducing the cost of manufacturing the controller IC. The controller IC may also share a comparison circuit among different pins and the different functions provided by those pins. Use of a shared comparison circuit further reduces the cost of manufacturing the controller IC without sacrificing the performance of the IC.Type: GrantFiled: September 12, 2012Date of Patent: March 24, 2015Assignee: Dialog Semiconductor, Inc.Inventors: Xiaolin Gao, Yong Li, Qiu Sha, Fuqiang Shi, John William Kesterson, Jiang Chen
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Publication number: 20140016376Abstract: Embodiments described herein describe a power supply configured to provide power to an output load via a power supply transformer. The power supply includes a controller configured to operate in a configuration state and an operating state. During the configuration state, the controller receives a configuration signal from a sense circuit coupled to the controller and selects one of a plurality of operating modes from the configuration signal. During the operating state, the controller controls a switch coupled to the transformer based on the selected operating mode and a sense signal received from the sense circuit representative of the power provided to the output load by the power supply. When the switch is closed, current flows from a power source through the transformer, and when the switch is open, current is prevented from flowing from the power source through the transformer.Type: ApplicationFiled: July 8, 2013Publication date: January 16, 2014Inventors: Xiaolin Gao, Qiu Sha, Fuqiang Shi, Yong Li
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Publication number: 20140015447Abstract: Embodiments disclosed herein describe the use of a power supply to provide power to an LED load. The power supply provides a present output current to the LED, and receives a temperature signal representing the operating temperature of the LED. A target output current is determined, for instance based on the temperature signal. An output current rate of change is determined, and the power supply adjusts the output current to the LED at the determined rate of change until the output current is substantially equal to the target current.Type: ApplicationFiled: March 13, 2013Publication date: January 16, 2014Applicant: iWatt Inc.Inventors: Fuqiang Shi, Qiu Sha, Xiaolin Gao, Gordon Chen
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Publication number: 20130121044Abstract: A controller integrated circuit (IC) for controlling a power converter uses one or more IC pins having plurality of functions such as configuration of a parameter supported by the controller IC and shutdown protection. Several different functions may be supported by a single IC pin, thereby reducing the number of pins required in the controller IC and also reducing the cost of manufacturing the controller IC. The controller IC may also share a comparison circuit among different pins and the different functions provided by those pins. Use of a shared comparison circuit further reduces the cost of manufacturing the controller IC without sacrificing the performance of the IC.Type: ApplicationFiled: September 12, 2012Publication date: May 16, 2013Applicant: IWATT INC.Inventors: Xiaolin Gao, Yong Li, Qiu Sha, Fuqiang Shi, John William Kesterson, Jiang Chen
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Patent number: 6897572Abstract: An integrated circuit including a power ring and an embedded low drop-off voltage regulator is disclosed herein. The regulator is located within an inner side of the power ring. An input of the regulator is coupled to the power ring. An output of the regulator is coupled to a circuit also included in the integrated circuit. The regulator is configured to fit within a bond pad frame.Type: GrantFiled: February 21, 2003Date of Patent: May 24, 2005Assignee: Spreadtrum Communications CorporationInventors: Datong Chen, Ping Wu, Qiu Sha
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Publication number: 20040164397Abstract: An integrated circuit including a power ring and an embedded low drop-off voltage regulator is disclosed herein. The regulator is located within an inner side of the power ring. An input of the regulator is coupled to the power ring. An output of the regulator is coupled to a circuit also included in the integrated circuit. The regulator is configured to fit within a bond pad frame.Type: ApplicationFiled: February 21, 2003Publication date: August 26, 2004Inventors: Datong Chen, Ping Wu, Qiu Sha