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1.发明授权Control circuit with synchronization unit for switching converter and associated control method 有权具有开关转换器同步单元的控制电路及相关控制方法公开(公告)号：US09479043B2
公开(公告)日：2016-10-25
申请号：US14625319
申请日：2015-02-18
发明人： Lijie Jiang , Xiaokang Wu , Suhua Luo , Qian Ouyang
CPC分类号： H02M1/0845 , H02M3/1584 , H03L7/0814 , H03L7/097
摘要： A control circuit for a switching converter having a comparison circuit, a synchronization unit, an ON-time control circuit and a logic unit, the comparison circuit provides a comparison signal based on a reference signal and an output signal of the switching converter, the synchronization unit provides a first synchronization signal and a second synchronization signal based on a first clock signal, a second clock signal and the comparison signal, the first synchronizing signal is generated by synchronizing the comparison signal with the first clock signal, the second synchronizing signal is generated by synchronizing the comparison signal with the second clock signal, the ON-time control circuit provides an ON-time control signal, the logic unit provides a switching control signal to control the switching converter based on the first synchronization signal, the second synchronization signal and the ON-time control signal.
摘要翻译： 一种用于具有比较电路，同步单元，接通时间控制电路和逻辑单元的开关转换器的控制电路，比较电路提供基于参考信号和开关转换器的输出信号的比较信号，同步 单元基于第一时钟信号，第二时钟信号和比较信号提供第一同步信号和第二同步信号，通过使比较信号与第一时钟信号同步来产生第一同步信号，产生第二同步信号 通过使比较信号与第二时钟信号同步，导通时间控制电路提供接通时间控制信号，逻辑单元提供切换控制信号，以根据第一同步信号，第二同步信号和 接通时间控制信号。
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2.发明申请CONTROL CIRCUIT WITH SYNCHRONIZATION UNIT FOR SWITCHING CONVERTER AND ASSOCIATED CONTROL METHOD 有权用于切换转换器和相关控制方法的同步单元的控制电路公开(公告)号：US20150236580A1
公开(公告)日：2015-08-20
申请号：US14625319
申请日：2015-02-18
发明人： Lijie Jiang , Xiaokang Wu , Suhua Luo , Qian Ouyang
CPC分类号： H02M1/0845 , H02M3/1584 , H03L7/0814 , H03L7/097
摘要： A control circuit for a switching converter having a comparison circuit, a synchronization unit, an ON-time control circuit and a logic unit, the comparison circuit provides a comparison signal based on a reference signal and an output signal of the switching converter, the synchronization unit provides a first synchronization signal and a second synchronization signal based on a first clock signal, a second clock signal and the comparison signal, the first synchronizing signal is generated by synchronizing the comparison signal with the first clock signal, the second synchronizing signal is generated by synchronizing the comparison signal with the second clock signal, the ON-time control circuit provides an ON-time control signal, the logic unit provides a switching control signal to control the switching converter based on the first synchronization signal, the second synchronization signal and the ON-time control signal.
摘要翻译： 一种用于具有比较电路，同步单元，接通时间控制电路和逻辑单元的开关转换器的控制电路，比较电路提供基于参考信号和开关转换器的输出信号的比较信号，同步 单元基于第一时钟信号，第二时钟信号和比较信号提供第一同步信号和第二同步信号，通过使比较信号与第一时钟信号同步来产生第一同步信号，产生第二同步信号 通过使比较信号与第二时钟信号同步，导通时间控制电路提供接通时间控制信号，逻辑单元提供切换控制信号，以根据第一同步信号，第二同步信号和 接通时间控制信号。
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3.发明授权Constant on-time switching converters with sleep mode and control methods thereof 有权具有睡眠模式的恒定导通时间切换转换器及其控制方法公开(公告)号：US09041373B2
公开(公告)日：2015-05-26
申请号：US13956073
申请日：2013-07-31
发明人： Lijie Jiang , Xiaokang Wu , Qian Ouyang
CPC分类号： H03K17/16 , H02M3/158 , H02M2001/0032 , Y02B70/16
摘要： A constant on-time switching converter includes a switching circuit, an on-time control circuit, a comparing circuit and a logic circuit. The switching circuit has a first switch and is configured to provide an output voltage to a load. The on-time control circuit generates an on-time control signal to control the on-time of the first switch. The comparing circuit compares the output voltage of the switching circuit with a reference signal and generates a comparison signal. The logic circuit generates a control signal to control the first switch based on the on-time control signal and the comparison signal. When the switching frequency of the switching circuit approaches an audible range, the switching converter enters into a sleep mode, the on-time control signal is reduced to increase the switching frequency of the switching circuit.
摘要翻译： 恒定导通时间切换转换器包括开关电路，导通时间控制电路，比较电路和逻辑电路。 开关电路具有第一开关并且被配置为向负载提供输出电压。 导通时间控制电路产生导通时间控制信号以控制第一开关的接通时间。 比较电路将开关电路的输出电压与参考信号进行比较，并产生比较信号。 逻辑电路基于接通时间控制信号和比较信号产生控制信号以控制第一开关。 当开关电路的开关频率接近可听范围时，开关转换器进入睡眠模式，导通时间控制信号被减小以增加开关电路的开关频率。
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公开(公告)号：US11637496B2
公开(公告)日：2023-04-25
申请号：US17392986
申请日：2021-08-03
发明人： Zhiyuan Yu , Xiaokang Wu , Min Xu
摘要： A switching converter has four switches and a control circuit. The control circuit provides a first drive signal to control a first switch and a second drive signal to control a second switch based on a first set signal, and provides a third drive signal to control the third switch and a fourth drive signal to control the fourth switch based on a second set signal. When an output voltage is larger than an input voltage, an on-time period of the third switch is adaptively adjusted according to the input voltage, the output voltage and a first parameter. When the output voltage is less than the input voltage, the on-time period of the third switch is adaptively adjusted according to the input voltage, the output voltage and a second parameter.
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公开(公告)号：US20220060113A1
公开(公告)日：2022-02-24
申请号：US17392986
申请日：2021-08-03
发明人： Zhiyuan Yu , Xiaokang Wu , Min Xu
摘要： A switching converter has four switches and a control circuit. The control circuit provides a first drive signal to control a first switch and a second drive signal to control a second switch based on a first set signal, and provides a third drive signal to control the third switch and a fourth drive signal to control the fourth switch based on a second set signal. When an output voltage is larger than an input voltage, an on-time period of the third switch is adaptively adjusted according to the input voltage, the output voltage and a first parameter. When the output voltage is less than the input voltage, the on-time period of the third switch is adaptively adjusted according to the input voltage, the output voltage and a second parameter.
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6.发明申请公开(公告)号：US20200007023A1
公开(公告)日：2020-01-02
申请号：US16453936
申请日：2019-06-26
发明人： Xiaokang Wu , Lijie Jiang , Suhua Luo
摘要： A multi-phase converter has a plurality of switching circuits coupled in parallel and a control circuit. The control circuit provides a set signal to successively turn ON the switching circuits under power operation based on an output voltage, a reference signal and a nonlinear control signal. When a number of switching circuits under power operation decreases, the nonlinear control signal increases to a preset value from an initial value, and then the nonlinear control signal decreases to the initial value with a preset slew rate.
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公开(公告)号：US20190068049A1
公开(公告)日：2019-02-28
申请号：US16103846
申请日：2018-08-14
发明人： Xiaokang Wu , Qian Ouyang , Yu Zhang , Xiaogang Wei
CPC分类号： H02M1/32 , H02M1/08 , H02M3/156 , H02M2001/0009 , H02M2001/0025
摘要： An over current protecting circuit, used with a switching converter having a switch, having: a current limiting circuit, configured to receive a limit indicating signal and to provide an on time signal to control an on time period of the switch based on the limit indicating signal, wherein if the limit indicating signal indicates a current flowing through the switch of the switching converter is larger than a limiting threshold, the on time period of a next switching cycle of the switch is subtracted with a first period, otherwise, the on time period of the switch of the next switching cycle is added with a second period; wherein a maximum on time period of the switch is fixed to be an on time reference.
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公开(公告)号：US10468973B2
公开(公告)日：2019-11-05
申请号：US16103846
申请日：2018-08-14
发明人： Xiaokang Wu , Qian Ouyang , Yu Zhang , Xiaogang Wei
摘要： An over current protecting circuit, used with a switching converter having a switch, having: a current limiting circuit, configured to receive a limit indicating signal and to provide an on time signal to control an on time period of the switch based on the limit indicating signal, wherein if the limit indicating signal indicates a current flowing through the switch of the switching converter is larger than a limiting threshold, the on time period of a next switching cycle of the switch is subtracted with a first period, otherwise, the on time period of the switch of the next switching cycle is added with a second period; wherein a maximum on time period of the switch is fixed to be an on time reference.
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公开(公告)号：US20190207518A1
公开(公告)日：2019-07-04
申请号：US16228131
申请日：2018-12-20
发明人： Xiaokang Wu , Lijie Jiang , Binci Xu
IPC分类号： H02M3/158 , H02M1/08 , G01R29/027 , G01R29/033
CPC分类号： H02M3/1584 , G01R29/0273 , G01R29/033 , H02M1/08 , H02M2001/0009 , H02M2003/1566 , H02M2003/1586
摘要： A control method of multi-phase converters, wherein the multi-phase converter includes a plurality of switching circuits coupled in parallel between an input voltage and a load. The control method includes: comparing a feedback signal with a reference signal to generate a comparison signal, wherein the feedback signal is indicative of an output voltage provided to the load; determining the number of switching circuits for power operation based on the load current; detecting a period of the comparison signal; comparing the detected period of the comparison signal with a time threshold to determine whether a transient rise of load current has occurred; and getting all the switching circuits into power operation if a transient rise of load current is detected.
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公开(公告)号：US20180173286A1
公开(公告)日：2018-06-21
申请号：US15842797
申请日：2017-12-14
发明人： Reagan Luo , Qian Ouyang , Lijie Jiang , Marvin Ma , Xiaokang Wu
摘要： An autonomous power system has a voltage regulator which converts an input voltage to an output voltage according to a reference voltage. A control method for the power system: receiving a voltage identification code sent by a processor; providing an autonomous voltage identification code when the voltage identification sent by the processor keeps constant during a first preset duration, wherein the autonomous voltage identification code can be updated self-adaptively; providing a reference voltage according to a sum of the voltage identification code and the autonomous identification code; and adjusting the output voltage according to the reference voltage.
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