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31. 发明申请

US20150188434A1 SINGLE INDUCTOR MULTIPLE OUTPUT BUCK CONVERTER AND CONTROL METHOD THEREOF 有权
标题翻译：单电感多输出滤波变换器及其控制方法
公开(公告)号：US20150188434A1
公开(公告)日：2015-07-02
申请号：US14588211
申请日：2014-12-31
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Qian Ouyang
IPC分类号： H02M3/158
CPC分类号： H02M3/158 , H02M2001/009
摘要： A single inductor multiple output buck converter includes an inductor having a first terminal and a second terminal, a first switch coupled between an input voltage and the first terminal of the inductor, a second switch coupled between the first terminal of the inductor and a reference ground, a third switch coupled between the second terminal of the inductor and a first output voltage, and a fourth switch coupled between the second terminal of the inductor and a second output voltage. A first feedback signal indicative of the first output voltage is compared with a first reference signal to generate a first comparison signal. A second feedback signal indicative of the second output voltage is compared with a second reference signal to generate a second comparison signal. Then which one of the first comparison signal and the second comparison signal is asserted first is detected, and the first to fourth switches are controlled based on the detection result.
摘要翻译：单电感器多输出降压转换器包括具有第一端子和第二端子的电感器，耦合在电感器的第一端子之间的第一开关，耦合在电感器的第一端子与参考接地端之间的第二开关耦合在电感器的第二端子与第一输出电压之间的第三开关，以及耦合在电感器的第二端子与第二输出电压之间的第四开关。将表示第一输出电压的第一反馈信号与第一参考信号进行比较以产生第一比较信号。将表示第二输出电压的第二反馈信号与第二参考信号进行比较以产生第二比较信号。然后，检测第一比较信号和第二比较信号中的哪一个被首先确定，并且基于检测结果来控制第一至第四开关。

32. 发明申请

US20140167833A1 DIGITAL CONTROLLERS AND DIGITAL CONTROL METHODS OF MULTI-PHASE SWITCHING CONVERTERS 有权
标题翻译：数字控制器和多相开关转换器的数字控制方法
公开(公告)号：US20140167833A1
公开(公告)日：2014-06-19
申请号：US14106643
申请日：2013-12-13
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Lijie Jiang , Xiaokang Wu , Suhua Luo , Qian Ouyang
IPC分类号： H03K17/16
CPC分类号： H02M3/1584 , H02M3/157
摘要： A method for controlling a multi-phase switching converter with a plurality of switching circuits, including: sensing the output current of the switching circuit and generating a current sensing signal; generating a digital phase current signal based on the current sensing signal; subtracting the digital phase current signal from a current reference signal and generating a current error signal; proportionally integrating the current error signal and generating a first bias signal; conducting a sigma-delta modulation of the first bias signal and generating a second bias signal, wherein the first bias signal is a P-bit digital signal, the second bias signal is a Q-bit digital signal, and P is larger than Q; and adjusting a control signal controlling the switching circuit based on the second bias signal.
摘要翻译：一种用于控制具有多个开关电路的多相开关转换器的方法，包括：感测开关电路的输出电流并产生电流感测信号; 基于电流感测信号产生数字相电流信号; 从当前参考信号减去数字相电流信号并产生电流误差信号; 成比例地积分当前误差信号并产生第一偏置信号; 对所述第一偏置信号进行Σ-Δ调制并产生第二偏置信号，其中所述第一偏置信号是P位数字信号，所述第二偏置信号是Q位数字信号，并且P大于Q; 以及基于所述第二偏置信号来调整控制所述开关电路的控制信号。

33. 发明申请

US20130307498A1 MULTI-PHASE SWITCHING CONVERTER AND CONTROL METHOD THEREOF 有权
标题翻译：多相开关变换器及其控制方法
公开(公告)号：US20130307498A1
公开(公告)日：2013-11-21
申请号：US13711570
申请日：2012-12-11
申请人： CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.
发明人： Lijie Jiang , Qian Ouyang , Xiaokang Wu , Bo Zhang , Suhua Luo , Yuancheng Ren , Eric Yang
IPC分类号： G05F1/10
CPC分类号： G05F1/10 , H02M3/1584 , H02M2001/0003 , H02M2001/0025 , H02M2003/1586
摘要： A multi-phase switching converter comprising a plurality of switching circuits, a comparing circuit and a control circuit. The comparing circuit generates a comparison signal based on a reference signal and the output voltage of the multi-phase switching converter. The control circuit can turn on the following switching circuit based on the comparison signal only after the time from the current switching circuit being turned on reaches a first time threshold or the off-time of the current switching circuit reaches a second time threshold, wherein the first time threshold is longer than the second time threshold.
摘要翻译：一种多相开关转换器，包括多个开关电路，比较电路和控制电路。比较电路基于参考信号和多相开关转换器的输出电压产生比较信号。控制电路只有在从当前开关电路接通到达第一时间阈值或者当前开关电路的关断时间达到第二时间阈值之后，才能基于比较信号接通以下开关电路，其中，第一时间阈值比第二时间阈值长。

34. 发明授权

US11362593B2 Dual mode resonant converter, and associated control circuit and control method thereof 有权
公开(公告)号：US11362593B2
公开(公告)日：2022-06-14
申请号：US17236900
申请日：2021-04-21
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Qian Ouyang
IPC分类号： H02M3/335 , H02M3/00
摘要： A control circuit for a resonant converter has a communication interface, a memory, and a primary switching control circuit. The memory provides a frequency setting signal capable of being programmed through a communication interface, the primary switching control circuit provides a first control signal to control a high-side switch and a second control signal to control a low-side switch. When the resonant converter works in an open loop mode, a frequency of the first control signal and the second control signal is determined by the frequency setting signal, an on-time period of the high-side switch equals an on-time period of the low-side switch, less than half of a resonant period.

35. 发明授权

US10425013B2 Resonant converter with improved light load efficiency and the method thereof 有权
公开(公告)号：US10425013B2
公开(公告)日：2019-09-24
申请号：US15898191
申请日：2018-02-15
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Qian Ouyang
IPC分类号： H02M1/00 , H02M1/08 , H02M3/335
摘要： A resonant converter highly improves light load efficiency. The resonant converter blocks control signals which are used to control power switches in an input power stage and an output stage in light load condition until an output voltage drops to a preset value. The input power stage and the output stage are coupled by way of a resonant net and a transformer.

36. 发明申请

US20190068049A1 OVER CURRENT PROTECTING CIRCUIT AND THE METHOD THEREOF 审中-公开
公开(公告)号：US20190068049A1
公开(公告)日：2019-02-28
申请号：US16103846
申请日：2018-08-14
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Xiaokang Wu , Qian Ouyang , Yu Zhang , Xiaogang Wei
IPC分类号： H02M1/32 , H02M1/08 , H02M3/156
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.

37. 发明申请

US20180262118A1 RESONANT CONVERTER WITH IMPROVED LIGHT LOAD EFFICIENCY AND THE METHOD THEREOF 审中-公开
公开(公告)号：US20180262118A1
公开(公告)日：2018-09-13
申请号：US15898191
申请日：2018-02-15
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Qian Ouyang
IPC分类号： H02M3/335
摘要： A resonant converter highly improves light load efficiency. The resonant converter blocks control signals which are used to control power switches in an input power stage and an output stage in light load condition until an output voltage drops to a preset value. The input power stage and the output stage are coupled by way of a resonant net and a transformer.

38. 发明授权

US09653992B2 Constant on-time switching converter with adaptive ramp compensation and control method thereof 有权
公开(公告)号：US09653992B2
公开(公告)日：2017-05-16
申请号：US14691247
申请日：2015-04-20
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Wei Yuan , Qian Ouyang
IPC分类号： G05F1/40 , H02M3/156 , H02M1/00
CPC分类号： H02M3/156 , H02M2001/0022 , H02M2001/0025
摘要： A COT switching converter includes a first switch, a second switch, an inductor, an on-time control circuit configured to generate an on-time control signal, a ramp compensation generator configured to generate a compensation signal, a comparing circuit, a logic circuit, a driving circuit and a feed forward circuit configured to generate a compensation control signal based on the input voltage of the switching circuit. The comparing circuit compares the sum of the compensation signal and a feedback signal with a reference signal to generate a comparison signal. Based on the on-time control signal and the comparison signal, the logic circuit generates a control signal with a duty cycle to drive the first and second switches through the driving circuit. The ramp compensation generator adjusts the compensation signal based on the compensation control signal, so the amplitude of the ramp compensation signal can follow a critical value proportional to the difference between the duty cycle and the square of the duty cycle.

39. 发明授权

US09236801B2 Switch mode power supply, control circuit and associated control method 有权
标题翻译：开关电源，控制电路及相关控制方式
公开(公告)号：US09236801B2
公开(公告)日：2016-01-12
申请号：US14102251
申请日：2013-12-10
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Qian Ouyang
IPC分类号： H02H3/00 , H02M3/158 , H02H7/12 , H02M3/156 , H02J9/00 , H02M1/00
CPC分类号： H02M3/158 , H02H7/1213 , H02J9/005 , H02M3/156 , H02M3/1588 , H02M2001/0032 , H02M2001/0058 , Y02B70/1466 , Y02B70/1491 , Y02B70/16
摘要： A switch mode power supply having an output terminal configured to provide an output voltage, the switch mode power supply has a first switch, a second switch and a control circuit. The control circuit is configured to provide a first switching control signal to turn ON and turn OFF the first switch, and when the switch mode power supply works in a power saving mode, the first switch is turned ON if a voltage feedback signal is less than a reference voltage and a current flowing through the second switch is less than a bias current.
摘要翻译：开关模式电源具有被配置为提供输出电压的输出端子，开关模式电源具有第一开关，第二开关和控制电路。控制电路被配置为提供第一开关控制信号以接通和断开第一开关，并且当开关模式电源工作在省电模式时，如果电压反馈信号小于第一开关，则第一开关导通参考电压和流经第二开关的电流小于偏置电流。

40. 发明申请

US20150155784A1 SWITCH MODE POWER SUPPLY WITH TRANSIENT CONTROL AND CONTROL METHOD THEREOF 审中-公开
标题翻译：具有瞬态控制的开关电源及其控制方法
公开(公告)号：US20150155784A1
公开(公告)日：2015-06-04
申请号：US14552104
申请日：2014-11-24
申请人： Chengdu Monolithic Power Systems Co., Ltd.
发明人： Qian Ouyang , Wei Yuan
IPC分类号： H02M3/156
CPC分类号： H02M3/1563 , H02M2001/0019 , H02M2003/1566
摘要： A SMPS has a switching circuit, an adding circuit and a comparing circuit. The adding circuit adds the output voltage feedback signal of the SMPS to the output current feedback signal of the SMPS to provide a combined feedback signal. The comparing circuit compares the combined feedback signal with a reference signal and provides a comparing signal. And the power switch of the SMPS is controlled based on the comparing signal.
摘要翻译： SMPS具有开关电路，加法电路和比较电路。加法电路将SMPS的输出电压反馈信号添加到SMPS的输出电流反馈信号，以提供组合的反馈信号。比较电路将组合的反馈信号与参考信号进行比较，并提供比较信号。并根据比较信号控制SMPS的电源开关。

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