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公开(公告)号：US20240364220A1
公开(公告)日：2024-10-31
申请号：US18479741
申请日：2023-10-02
发明人： Minwoo KIM , Hyungju PARK , Woosuk CHOI , Wookwan LEE
CPC分类号： H02M3/1582 , H02M1/088 , H02M1/14 , H02M1/32
摘要： A power supply includes a first and second switching node, a first power switch and a second power switch, and a first bootstrap capacitor, the first bootstrap capacitor including one end connected to the first switching node, a third and a fourth power switch, and a second bootstrap capacitor, the second bootstrap capacitor including one end connected to the second switching node, and a charge sharing circuit storing a charge using a power supply voltage, providing a first charge sharing path for the first bootstrap capacitor from the stored charge based on a first voltage charged in the first bootstrap capacitor, and to provide a second charge sharing path for the second bootstrap capacitor from the stored charge based on a second voltage charged in the second bootstrap capacitor. The first charge sharing path and the second charge sharing path include a common charge sharing path and overlap each other.
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公开(公告)号：US20240356442A1
公开(公告)日：2024-10-24
申请号：US18650411
申请日：2024-04-30
发明人： Gregory Szczeszynski
CPC分类号： H02M3/158 , H02M1/0095 , H02M1/14
摘要： Circuits and methods that solve the light-load problem of a multi-level converter by generating a ripple signal in the control loop of the multi-level converter that causes a large output current ripple during light load conditions. This added current ripple does not change the average output current but does create a temporary positive and negative current that can be used to balance and charge/discharge the fly capacitors of the multi-level converter. An alternative approach is to add extra switching cycles for the fly capacitors when the output ripple current crosses zero.
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公开(公告)号：US20240348172A1
公开(公告)日：2024-10-17
申请号：US18292315
申请日：2022-07-27
CPC分类号： H02M3/33571 , H02M1/0058 , H02M1/126 , H02M1/14 , H02M3/01 , H02M7/797 , H02M1/009 , H02M1/44 , H02M3/33584
摘要： Systems and methods for a high-efficiency power converter incorporating a half-bridge topology with one or more an additional upper capacitor and a drain-source capacitor. The converter includes DC voltage terminals and a DC link capacitor coupled across a positive and negative DC terminal of the DC voltage terminals. The converter further includes a power switching element pair including a high side switch and a low side switch coupled together at a midpoint node. The converter further includes an LC filter having a switch-side inductor, a lower capacitor coupled between a second end of switch-side inductor and the negative DC terminal; and an upper capacitor coupled between the second end of the switch-side inductor and the positive DC terminal. The converter may further include drain-source capacitors coupled across the drain and source terminals of the switches.
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公开(公告)号：US12107513B2
公开(公告)日：2024-10-01
申请号：US17801599
申请日：2020-03-27
发明人： Takeo Yamamoto , Shinichiro Hayashi
IPC分类号： H02M7/483 , H02M1/14 , H02M7/487 , H02M7/5387
CPC分类号： H02M7/483 , H02M1/143 , H02M7/4833 , H02M7/487 , H02M7/53873
摘要： A three-level power converter includes a direct current power supply unit including a filter capacitor connected between a high potential line and an intermediate potential line and a filter capacitor connected between the intermediate potential line and a low potential line, and a power conversion circuit that converts a three-level direct current voltage output from the high potential line, the intermediate potential line, and the low potential line into a three-phase alternating current voltage. A controller generates an imbalance signal representing an imbalance between a first capacitor voltage and a second capacitor voltage on the basis of values detected by voltage sensors, and generates a modulation signal for causing the power conversion circuit to perform a two-phase modulation operation on the basis of a superimposed signal obtained by superimposing the imbalance signal on a reference signal of the three-phase alternating current voltage.
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5.发明公开公开(公告)号：US20240322694A1
公开(公告)日：2024-09-26
申请号：US18598849
申请日：2024-03-07
发明人： Alexandr Ikriannikov
CPC分类号： H02M3/33507 , H02M1/0064 , H02M1/0095 , H02M1/14 , H02M1/40
摘要： A two-stage switching power converter includes a first power stage, a second power stage electrically coupled in series with the first power stage, and a controller. The first power stage includes a first power transfer winding, and the second power stage includes a second power transfer winding that is magnetically coupled to the first power transfer winding. The controller is configured to (a) control switching of the second power stage to regulate at least one parameter of the two-stage switching power converter and (b) control switching of the first power stage such that the first power stage switches in a complementary manner with respect to the second power stage.
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公开(公告)号：US20240313636A1
公开(公告)日：2024-09-19
申请号：US18602432
申请日：2024-03-12
发明人： Rulong JIANG , Zhen ZHU , Xiaoru GAO , Yi ZHANG , Ge YANG
CPC分类号： H02M1/143 , H02M3/156 , H03F3/45475 , H03F3/456
摘要： The present invention provides a built-in ripple injection circuit and a control chip, in which a divided feedback voltage is obtained by division of an output voltage by a feedback circuit, and high-frequency ripple in the output voltage is obtained by an operational amplifier and a first capacitor. Moreover, the high-frequency ripple is injected at a third terminal of a source follower. As a result, the feedback voltage is a superimposition of the divided feedback voltage with the high-frequency ripple. This can enhance stability and interference resilience of a power supply system operating in a ripple-based COT control mode. Further, the built-in ripple circuit can be integrated in the control chip. This dispenses with the use of a large capacitor and satisfactorily addresses applications requiring on-chip integration of the feedback circuit, reducing the cost of the power supply system.
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公开(公告)号：US12057768B2
公开(公告)日：2024-08-06
申请号：US17809413
申请日：2022-06-28
发明人： Jiwei Fan , Yingqian Ma , Yifan Dong
CPC分类号： H02M1/143 , H02M1/0016 , H02M1/0019 , H02M1/0022 , H02M1/0025 , H02M3/158
摘要： A ripple amplitude compensation circuit for ripple-based control of DC-DC converter, wherein the ripple amplitude compensation circuit for adjusts the gains of the voltage loop and ripple loop according to the ripple amplitude. With the present invention, the ripple-based control loop's performance can be optimized.
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公开(公告)号：US20240258917A1
公开(公告)日：2024-08-01
申请号：US18161924
申请日：2023-01-31
发明人： Saqib SATTI , Qiao YANG , Stefan HERZER
摘要： A circuit includes a transistor and a ringing control circuit. The transistor is coupled between an input voltage terminal and a switching terminal. The transistor includes a control terminal. The ringing control circuit has a control input and a control output. The control input is coupled to the switching terminal, and the control output is coupled to the control terminal.
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公开(公告)号：US20240258906A1
公开(公告)日：2024-08-01
申请号：US18007214
申请日：2021-01-08
发明人： Naoto NIIMURA
CPC分类号： H02M1/14 , H02M1/0009 , H02M5/458
摘要： According to an embodiment, a power conversion system includes a plurality of converters and a control unit. The plurality of converters are provided in parallel for each phase of a multi-phase alternating current power system. The control unit uses a plurality of carrier signals having a prescribed phase difference from each other in carrier comparison type pulse width modulation (PWM) control. The control unit detects a current of a primary side of the plurality of converters at each of four or more even-numbered timings when the four or more even-numbered timings are defined at prescribed time intervals during one cycle of a specific carrier signal among the plurality of carrier signals. The control unit generates a reference voltage for the PWM control using a value of the detected current of the primary side and a value of a reference current of the primary side and updates the reference voltage at each of the four or more even-numbered timings. The control unit controls a specific converter among the plurality of converters using the specific carrier signal and the updated reference voltage.
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公开(公告)号：US12051977B2
公开(公告)日：2024-07-30
申请号：US17527482
申请日：2021-11-16
发明人： Gerald Deboy , Matthias J. Kasper
CPC分类号： H02M3/1584 , H02M1/0048 , H02M1/14
摘要： An apparatus such as a power supply or other suitable entity includes a controller. The controller receives a target ripple current value indicative of a ripple current associated with an output voltage and corresponding output current of a power converter powering a load. The controller selects a switching frequency of operating the power converter as a function of a magnitude of the received target ripple current value. The controller applies the selected switching frequency to switches in the power converter to produce the output current with a magnitude of the ripple current as indicated by the target ripple current value.
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