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公开(公告)号：US20170324411A1
公开(公告)日：2017-11-09
申请号：US15272412
申请日：2016-09-21
Applicant: Chengdu Monolithic Power Systems, Co., Ltd.
Inventor： Junyong Gong , Jian Jiang , Yike Li , Changjiang Chen
IPC: H03K19/017 , H02M3/07
CPC classification number: H03K19/01735 , H02M3/07 , H02M3/1588 , H02M2001/0006 , H03K19/01714
Abstract: A bootstrap circuit integrated to a voltage converter integrated circuit (IC) and a voltage converter IC for a switch mode voltage regulator. The bootstrap circuit is used to provide a bootstrap voltage signal for driving a high side switch of the voltage converter IC. The bootstrap circuit has a pre-charger and a bootstrap capacitor. The pre-charger provides a first bootstrap signal to pre-charge a control terminal of the high side switch, and the bootstrap capacitor provides a second bootstrap signal to enhance the charge of the control terminal of the high side switch.
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公开(公告)号：US20170187290A1
公开(公告)日：2017-06-29
申请号：US15389390
申请日：2016-12-22
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yike Li
IPC: H02M3/158
CPC classification number: H02M3/1582 , H02M2001/0058 , Y02B70/1491
Abstract: A control method used in a four-switch buck-boost converter includes: sensing the output voltage and generating a feedback signal; generating a compensation signal based on a reference signal and the feedback signal; sensing the current flowing through the inductor and generating a current sensing signal; comparing the current sensing signal with the compensation signal; turning on the first and third transistors and turning off the second and fourth transistors when the current sensing signal reduces to be lower than the compensation signal; turning off the first transistor and turning on the second transistor when the on-time of the first transistor in one switching period reaches a first time threshold; and turning off the third transistor and turning on the fourth transistor when the on-time of the third transistor reaches a second time threshold.
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公开(公告)号：US09641085B2
公开(公告)日：2017-05-02
申请号：US14630215
申请日：2015-02-24
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yike Li
CPC classification number: H02M3/33507 , H02M1/36 , H03K21/08 , H03K23/667
Abstract: A power converter having a clock module and a method for controlling a clock signal of the power converter. The clock module is configured to provide the clock signal and to set a clock frequency of the clock signal to a first predetermined frequency at the moment when the power converter is powered on. The clock module is further configured to regulate the clock frequency to increase from the first predetermined frequency to a second predetermined frequency through a predetermined times of step type frequency increase during a startup procedure of the power converter.
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公开(公告)号：US09577520B2
公开(公告)日：2017-02-21
申请号：US14838251
申请日：2015-08-27
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Liping Xiu , Yike Li
CPC classification number: H02M3/156 , H02M1/08 , H02M3/1588 , H02M2001/0006 , H02M2001/0045 , Y02B70/1466
Abstract: A power converter with bootstrap circuit, the power converter has a high side switch, a low side switch, a bootstrap circuit and a bootstrap capacitor for providing a bootstrap voltage to supply a high side driver of the high side switch. The power converter receives an input voltage and provides an output voltage based on driving the high side switch and the low side switch to switch on and off. The bootstrap circuit has a first comparing circuit, a first comparing circuit, a boost circuit and a second charging circuit. The second charging circuit charges the bootstrap capacitor when a voltage difference between the input voltage and the output voltage is smaller than a voltage threshold.
Abstract translation: 具有自举电路的功率转换器，功率转换器具有高侧开关，低侧开关，自举电路和自举电容器，用于提供自举电压以供应高侧开关的高侧驱动器。 功率转换器接收输入电压，并提供基于驱动高侧开关和低侧开关的输出电压来接通和断开。 自举电路具有第一比较电路，第一比较电路，升压电路和第二充电电路。 当输入电压和输出电压之间的电压差小于电压阈值时，第二充电电路对自举电容充电。
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公开(公告)号：US20160261198A1
公开(公告)日：2016-09-08
申请号：US15062010
申请日：2016-03-04
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yike Li
CPC classification number: H02M3/33507 , H02M1/15 , H02M1/32 , H02M3/33561 , H02M2001/0032 , Y02B70/16
Abstract: A primary side regulated isolation voltage converter. The primary side regulated isolation voltage converter comprises a control module and a ripple control circuit. The control module receives the voltage feedback signal and determines whether the isolation voltage converter operates in a light load state. When the isolation voltage converter operates in a light load state, the ripple control circuit senses the ripple of an output voltage signal to generate a ripple signal, and compare the ripple signal with a ripple threshold. When the ripple signal is larger than the ripple threshold, the isolation voltage converter jumps out the light load state.
Abstract translation: 初级侧调节隔离电压转换器。 初级侧调节隔离电压转换器包括控制模块和纹波控制电路。 控制模块接收电压反馈信号，并确定隔离电压转换器是否在轻负载状态下工作。 当隔离电压转换器工作在轻负载状态时，纹波控制电路检测输出电压信号的纹波，产生纹波信号，并将纹波信号与纹波阈值进行比较。 当纹波信号大于纹波阈值时，隔离电压转换器跳出轻负载状态。
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Patent Agency Ranking
公开(公告)号：US20150200536A1
公开(公告)日：2015-07-16
申请号：US14594000
申请日：2015-01-09
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yike Li , Wangrui Guo
CPC classification number: H02H7/1213 , H02H1/06 , H02H3/093
Abstract: A short-circuit protection method for a boost converter is disclosed. In this method, a switch of a switching circuit of the boost converter is turned on and a control voltage with a gradually increasing magnitude is supplied to control a short-circuit protection switch coupled between an input voltage and the switching circuit when the boost converter starts up. Then, a current flowing through the switch is detected and compared with a predetermined value. The switch is turned off and a preset time period is initiated if the current is higher than the predetermined value. It is detected whether a short-circuit event occurs at an output terminal of the boost converter at the end of the preset time period. If the short-circuit event occurs, the short-circuit protection switch is then turned off.
Abstract translation: 公开了一种用于升压转换器的短路保护方法。 在该方法中，升压转换器的开关电路的开关导通，并且提供逐渐增加的幅度的控制电压，以在升压转换器启动时控制耦合在输入电压和开关电路之间的短路保护开关 向上。 然后，检测流过开关的电流并将其与预定值进行比较。 如果电流高于预定值，则关闭开关并启动预设时间段。 检测在预设时间段结束时在升压转换器的输出端子是否发生短路事件。 如果发生短路事件，则断路短路保护开关。
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7.发明申请LOAD REGULATION COMPENSATION MODULE AND SWITCHING CONVERTER COMPRISING THE SAME 有权负载调节补偿模块和包括其的开关转换器公开(公告)号：US20140300336A1
公开(公告)日：2014-10-09
申请号：US14247854
申请日：2014-04-08
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
IPC: H02M3/156
CPC classification number: H02M3/156 , H02M2001/0009 , H02M2001/0025
Abstract: A switching converter and a load regulation compensation module for improving load regulation accuracy of the switching converter. The switching converter regulates its output voltage through controlling a switch module to switch on and off based on a first reference signal and a feedback signal indicative of the output voltage. The on and off switching of the switch module generates a switching current, resulting in an average offset voltage between an internal reference ground and a package ground pin of the switching converter. The load regulation compensation module is configured to monitor the switching current, and to compensate a second reference signal having a bandgap reference voltage referenced to the internal reference ground based on the monitored switching current to generate the first reference signal, so that the average offset voltage is substantially cancelled out from the first reference signal with respect to the package ground pin.
Abstract translation: 一种开关转换器和负载调节补偿模块，用于提高开关转换器的负载调节精度。 开关转换器通过基于第一参考信号和表示输出电压的反馈信号通过控制开关模块来接通和断开来调节其输出电压。 开关模块的导通和关断切换产生开关电流，导致开关转换器的内部参考地和封装接地引脚之间的平均失调电压。 负载调整补偿模块被配置为监视开关电流，并且基于所监视的开关电流来补偿具有参考内部参考地的带隙参考电压的第二参考信号，以产生第一参考信号，使得平均偏移电压 相对于封装接地引脚基本上从第一参考信号抵消。
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公开(公告)号：US20140153301A1
公开(公告)日：2014-06-05
申请号：US13931749
申请日：2013-06-28
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Siran Wang , Yike Li , Kun Yi , Yuancheng Ren , Junming Zhang , En Li
CPC classification number: G01R19/175 , G01R31/42
Abstract: An AC signal detector having: a rectify circuit having a first input terminal and a second input terminal configured to receive an AC signal, and an output terminal configured to provide a rectified signal based on the AC signal; a detecting circuit having an input terminal coupled to the output terminal of the rectify circuit to receive the rectified signal, and an output terminal configured to provide a square signal based on the rectified signal; and an unplug indicate circuit having an input terminal coupled to the detecting circuit to receive the square signal, and an output terminal configured to provide an unplug indicate signal based on the square signal.
Abstract translation: 一种AC信号检测器，具有：具有第一输入端和被配置为接收AC信号的第二输入端的整流电路，以及输出端，被配置为基于所述AC信号提供整流信号; 检测电路，其具有耦合到整流电路的输出端以接收整流信号的输入端子，以及输出端子，被配置为基于整流信号提供平方信号; 以及拔出指示电路，其具有耦合到所述检测电路的输入端子以接收所述平方信号，以及输出端子，被配置为基于所述平方信号提供拔出指示信号。
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公开(公告)号：US10523106B2
公开(公告)日：2019-12-31
申请号：US15843700
申请日：2017-12-15
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yike Li
Abstract: A method for controlling a multi-channel SMPS having N switching circuits. The method is generating a fast system clock and N load indication signals indicative of load statuses of the N switching circuits, then generating N clock control signals based on the preset pulses of the fast system clock and the N load indication signals. If one of the N switching circuits is detected to transit from a heavy load condition to a light load condition, forming the corresponding clock control signal based on the first pulse of the fast system clock after the corresponding load indication signal transits from the first state to the second state.
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公开(公告)号：US20190149030A1
公开(公告)日：2019-05-16
申请号：US16186241
申请日：2018-11-09
Applicant: Chengdu Monolithic Power Systems Co., Ltd.
Inventor： Yike Li
Abstract: An isolated power supply circuit has a first reference ground, a second reference ground, a power source, a first receiving circuit, a second receiving circuit, a first inverter circuit, a second inverter circuit and an isolated conversion circuit. The first reference ground and the second reference ground are isolated from each other. The first receiving circuit is coupled to the first reference ground. The second receiving circuit is coupled to the second reference ground. The power source provides a first power signal for the first receiving circuit directly. The first inverter circuit and the second inverter circuit receive the first power signal and produce a first inverter signal and a second inverter signal. And the isolated conversion circuit outputs a second power signal to the second receiving circuit based on the first inverter signal and the second inverter signal.
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