-
公开(公告)号：US20190199205A1
公开(公告)日：2019-06-27
申请号：US15866239
申请日：2018-01-09
申请人： Flex Ltd.
发明人： Zhang Tao , Keting Wang
CPC分类号： H02M1/4241 , H02M1/083 , H02M7/06 , H02M7/217 , H02M2001/0058 , H02M2001/4291
摘要： The zero voltage switching quasi-resonant PFC buck-boost converter is directed to a circuit and method of operating the circuit that provides improved efficiency, decreased switching losses and operation at higher frequencies as compared to conventional bridgeless PFC buck-boost converter. The zero voltage switching quasi-resonant PFC buck-boost converter includes a buck transistor switch coupled to an input AC voltage source, a PFC transistor switch and a PFC diode coupled to an output voltage bulk capacitor, and a zero crossing detect inductor magnetically coupled to a buck-boost inductor for determining minimum voltage levels at which to turn ON the buck transistor switch and the PFC transistor switch. The zero voltage switching quasi-resonant PFC buck-boost converter with voltage shifter control addresses the problems of conventional bridgeless PFC buck-boost converters by using different voltage modes and zero crossing detection control.
-
公开(公告)号：US20190115830A1
公开(公告)日：2019-04-18
申请号：US16085680
申请日：2017-03-20
申请人： PSEMI CORPORATION
发明人： David GIULIANO
CPC分类号： H02M3/07 , H02M1/42 , H02M1/4225 , H02M3/00 , H02M3/158 , H02M3/1582 , H02M2001/007 , H02M2001/4291 , H02M2003/077 , Y02B70/126
摘要： An apparatus for controlling a power converter that includes an inductance and a switched-capacitor network that cooperate to transform a first voltage into a second voltage features a controller, a switched-capacitor terminal for connection to the switched-capacitor network, and switches. at least one of which connects to the switched-capacitor terminal.
-
公开(公告)号：US20180191250A1
公开(公告)日：2018-07-05
申请号：US15898499
申请日：2018-02-17
CPC分类号： H02M3/158 , H02M1/14 , H02M3/07 , H02M2001/007 , H02M2001/4291 , H02M2003/072 , Y02B70/126
摘要： The present disclosure provides an asymmetric switching capacitor regulator that is capable of providing an output voltage, covering a wide voltage range, with a high efficiency. The disclosed switching capacitor regulator is configured to generate a wide range of an output voltage by differentiating a voltage across one or more switching capacitors from a voltage across the rest of the switching capacitors in the switching capacitor regulator.
-
公开(公告)号：US09979295B2
公开(公告)日：2018-05-22
申请号：US15477579
申请日：2017-04-03
申请人： Qorvo US, Inc.
发明人： Michael R. Kay , Manbir Singh Nag
CPC分类号： H02M3/1582 , H02M3/07 , H02M3/1584 , H02M2001/0003 , H02M2001/0045 , H02M2001/4291 , H02M2003/1586 , H03F3/38
摘要： A buck-boost DC-DC converter, which includes converter control circuitry, converter switching circuitry, and a first inductive element, is disclosed. The converter control circuitry provides a buck mode timing signal and a boost mode timing signal. The converter switching circuitry provides a switching output signal. During a buck mode of the buck-boost DC-DC converter, when a buck pulse-width of the switching output signal is less than a buck pulse-width threshold, the buck pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. During a boost mode of the buck-boost DC-DC converter, when a boost pulse-width of the switching output signal is less than a boost pulse-width threshold, the boost pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. The first inductive element receives and filters the switching output signal to provide a converter output signal.
-
公开(公告)号：US20180138853A1
公开(公告)日：2018-05-17
申请号：US15370345
申请日：2016-12-06
发明人： Wei-Shuo TSENG , Chao-Chin CHUANG , Yao-Yang YU , Li-Wei HSIAO
CPC分类号： H02P29/10 , H02M1/32 , H02M1/4225 , H02M2001/0022 , H02M2001/325 , H02M2001/4291 , H02P6/085 , H02P6/14 , H02P6/28 , H02P23/26 , H02P27/06 , H02P2201/07 , Y02B70/126 , Y02P80/112
摘要： An electronically commutated fan system includes an alternating-current-to-direct-current conversion unit, an inverter unit and a control unit. The alternating-current-to-direct-current conversion unit converts an alternating-current input power source into a first direct-current power source. The inverter unit is electrically connected between the alternating-current-to-direct-current conversion unit and a fan. The inverter unit converts the first direct-current power source into an alternating-current output power source and provides the alternating-current output power source to the fan to rotate. The control unit is electrically connected to the alternating-current-to-direct-current conversion unit and the inverter unit. The control unit controls the alternating-current-to-direct-current conversion unit and the inverter unit to adjust a rotational speed of the fan. When the control unit detects a power variation of the alternating-current input power source, the control unit controls the rotational speed of the fan to be maintained within a first error range.
-
公开(公告)号：US20170331381A1
公开(公告)日：2017-11-16
申请号：US15395641
申请日：2016-12-30
发明人： Yi-Wei Lee , Chien-Yang Chen , Isaac Y. Chen , Ta-Yung Yang
CPC分类号： H02M3/33507 , H02M1/088 , H02M1/4208 , H02M1/4225 , H02M1/4258 , H02M2001/0009 , H02M2001/4291 , H02M2003/1566
摘要： The present invention provides a switching regulator with PFC function and a control circuit and a control method thereof. The switching regulator with PFC function includes a power stage circuit, a current sense circuit, and a control circuit. The power stage circuit operates at least one power switch therein according to an operation signal to convert an input voltage to an output voltage. When a transient voltage of the input voltage exceeds a transient voltage upper limit, or when a transient slew rate of the input voltage exceeds a transient slew rate upper limit, the control circuit adjusts a frequency response gain from a stable state frequency response gain to a transient state frequency response gain, such that a transient current of an output current does not exceed a current upper limit, and/or that a transient response time of the output current does not exceed a threshold transient time period.
-
公开(公告)号：US20170207705A1
公开(公告)日：2017-07-20
申请号：US15477579
申请日：2017-04-03
申请人： Qorvo US, Inc.
发明人： Michael R. Kay , Manbir Singh Nag
CPC分类号： H02M3/1582 , H02M3/07 , H02M3/1584 , H02M2001/0003 , H02M2001/0045 , H02M2001/4291 , H02M2003/1586 , H03F3/38
摘要： A buck-boost DC-DC converter, which includes converter control circuitry, converter switching circuitry, and a first inductive element, is disclosed. The converter control circuitry provides a buck mode timing signal and a boost mode timing signal. The converter switching circuitry provides a switching output signal. During a buck mode of the buck-boost DC-DC converter, when a buck pulse-width of the switching output signal is less than a buck pulse-width threshold, the buck pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. During a boost mode of the buck-boost DC-DC converter, when a boost pulse-width of the switching output signal is less than a boost pulse-width threshold, the boost pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. The first inductive element receives and filters the switching output signal to provide a converter output signal.
-
公开(公告)号：US09614443B2
公开(公告)日：2017-04-04
申请号：US14808119
申请日：2015-07-24
发明人： Michael R. Kay , Manbir Singh Nag
CPC分类号： H02M3/1582 , H02M3/07 , H02M3/1584 , H02M2001/0003 , H02M2001/0045 , H02M2001/4291 , H02M2003/1586 , H03F3/38
摘要： A buck-boost DC-DC converter, which includes converter control circuitry, converter switching circuitry, and a first inductive element, is disclosed. The converter control circuitry provides a buck mode timing signal and a boost mode timing signal. The converter switching circuitry provides a switching output signal. During a buck mode of the buck-boost DC-DC converter, when a buck pulse-width of the switching output signal is less than a buck pulse-width threshold, the buck pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. During a boost mode of the buck-boost DC-DC converter, when a boost pulse-width of the switching output signal is less than a boost pulse-width threshold, the boost pulse-width is limited based on both the buck mode timing signal and the boost mode timing signal. The first inductive element receives and filters the switching output signal to provide a converter output signal.
-
公开(公告)号：US20160248264A1
公开(公告)日：2016-08-25
申请号：US14628841
申请日：2015-02-23
发明人： Michael Herfurth , Xiaowu Gong
IPC分类号： H02J5/00
CPC分类号： H02M3/156 , H02M1/10 , H02M2001/4291 , Y02B70/126
摘要： Methods, devices, and integrated circuits are disclosed for a driver controller that determines whether an input is AC or DC and controls a driver in either an AC-adapted control mode or a DC-adapted control mode. An example method includes detecting whether an input is primarily AC or DC. The method further includes controlling an output current in an AC-adapted control mode in response to detecting that the input is primarily AC, and controlling the output current in a DC-adapted control mode in response to detecting that the input is primarily DC.
摘要翻译： 公开了用于确定输入是AC还是DC并且以AC适应控制模式或直流适配控制模式控制驱动器的驱动器控制器的方法，装置和集成电路。 示例性方法包括检测输入是主要是AC还是DC。 该方法还包括响应于检测到输入主要是AC来控制AC适应控制模式中的输出电流，并且响应于检测到输入主要是DC来控制DC适应控制模式中的输出电流。
-
公开(公告)号：US20160149511A1
公开(公告)日：2016-05-26
申请号：US14553841
申请日：2014-11-25
发明人： Michael Herfurth , Xiaowu Gong
IPC分类号： H02M7/217
CPC分类号： H02M1/4208 , H02M2001/0003 , H02M2001/4291 , Y02B70/126
摘要： Methods, devices, and integrated circuits are disclosed for a driver controller that internally calculates average output current. In one example, a method includes receiving an output voltage of an output line. The method further includes performing a calculation of an average output current at the output line based at least in part on the output voltage. The method further includes controlling an interval timing of a switch based at least in part on the calculation of the average output current at the output line, wherein the switch is configured for switching current to the output line.
摘要翻译： 公开了用于在内部计算平均输出电流的驱动器控制器的方法，装置和集成电路。 在一个示例中，一种方法包括接收输出线的输出电压。 该方法还包括至少部分地基于输出电压来执行输出线处的平均输出电流的计算。 该方法还包括至少部分地基于输出线处的平均输出电流的计算来控制开关的间隔定时，其中开关被配置为将电流切换到输出线。
-
-
-
-
-
-
-
-
-
搜索结果
148 条记录 (耗时 0.018 秒)
