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公开(公告)号：US20240348249A1
公开(公告)日：2024-10-17
申请号：US18630493
申请日：2024-04-09
IPC分类号： H03K17/687 , H02M1/088 , H02M3/157 , H02M3/158
CPC分类号： H03K17/6871 , H02M1/088 , H02M3/157 , H02M3/158
摘要： A power MOSFET driver circuit includes a feedback circuit configured to supply a feedback signal that signals when a gate voltage of the power MOSFET crosses a plateau value and the power MOSFET switches conduction state. The feedback circuit includes a comparator with a replica MOSFET of the power MOSFET, with scaled down dimensions, whose gate is coupled to the gate electrode of the power MOSFET. A bistable circuit has an input coupled to an output of the replica MOSFET and is configured to change a logic state of the feedback signal following the transition of the switching signal when the gate voltage of the power MOSFET crosses the plateau value and the power MOSFET switches conduction state.
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公开(公告)号：US20240339922A1
公开(公告)日：2024-10-10
申请号：US18404674
申请日：2024-01-04
发明人： Beomhee Park , Jaihyuk Choi , Jung Su Choi , Hyeon Deok Jeon
摘要： The switching converter equipped with negative current tracking control includes a switching transistor whose drain is connected to an input power supply, a rectifying transistor whose drain is connected to a source of the switching transistor and whose source is connected to a ground, an inductor having one end connected to the source of the switching transistor and the drain of the rectifying transistor, an output capacitor having a first end connected to the other end of the inductor and a second end connected to a ground, a PWM controller that outputs a PWM control signal to a gate of the switching transistor and a gate of the rectifying transistor, a zero current detector that detects zero crossing of an inductor current flowing through the inductor, and a negative current tracking controller that variably adjusts an offset of the zero current detector.
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公开(公告)号：US20240333153A1
公开(公告)日：2024-10-03
申请号：US18578770
申请日：2022-06-27
申请人： SIGNIFY HOLDING B.V.
发明人： HUI ZHANG , YUFEI ZHOU , JIANLIANG WU
CPC分类号： H02M3/157 , H02M1/0009 , H02M1/0025 , H02M3/158
摘要： A switch mode power converter input terminals to receive high voltage input power and output terminals to provide output power. The converter has a high side/float main power switch, a current sensing resistor and an energy storage component. A current setting circuit is used to control a current source circuit to drive a through a biasing resistor connected between the high voltage input and a reference voltage potential according to a grounded current setting. The high side power switch is controlled by a high side/float control circuit based on sensing a voltage across a series connection of the current sensing resistor and the biasing resistor. Thus the grounded current setting is transmitted to the high side control circuit without using complex level shifter circuit such as transformer or opto-coupler.
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公开(公告)号：US20240313632A1
公开(公告)日：2024-09-19
申请号：US18447316
申请日：2023-08-10
发明人： Ching-Jan CHEN , Chieh-Ju TSAI , Ching-Yang WU
摘要： A power converter includes a power stage, a feedback circuit, a ramp generator and a controller. The power stage generates a pulse width modulation signal for forming an output voltage. The controller includes a comparator, a control logic circuit, an on-time generator and an off-time generator. The comparator generates a comparison signal according to a compensation signal from the feedback circuit and a ramp signal from the ramp generator. The control logic circuit generates a first trigger signal according to the comparison signal and an off-time pulse signal. The on-time generator generates a duty signal according to the first trigger signal. The duty signal is transmitted to the power stage for controlling a duty cycle ratio of the pulse width modulation signal. The off-time generator generates the off-time pulse signal according to the duty signal and transmits the off-time pulse signal to the control logic circuit.
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公开(公告)号：US12095367B2
公开(公告)日：2024-09-17
申请号：US17348705
申请日：2021-06-15
发明人： Al-Thaddeus Avestruz , Xiaofan Cui
CPC分类号： H02M3/1566 , H02M1/0009 , H02M3/157 , H02M3/158
摘要： A device for power conversion includes an inductor, a switch having a switching cycle to control current flow through the inductor, a sensor coupled to the inductor to generate a signal representative of the current flow through the inductor, and a controller configured to generate a switch control signal for the switch to implement cycle-by-cycle control of the switching cycle for current-mode control of an output driven by the current flow through the inductor, the controller being coupled to the sensor such that the cycle-by-cycle control is based on the signal representative of the current flow through the inductor. The inductor is configured to exhibit a decrease in inductance with an increase in the current flow through the inductor.
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公开(公告)号：US12051965B2
公开(公告)日：2024-07-30
申请号：US17887181
申请日：2022-08-12
发明人： Marco Borghese , Simone Bellisai
CPC分类号： H02M1/08 , H02M1/0032 , H02M3/157 , H02M3/158
摘要： A driver circuit includes an input node to receive an input signal for conversion at the output node of a converter, a driver node to provide to a switching power circuit stage in the converter a pulse-width modulated drive signal having an active time, first and second active time generation paths, and a selector circuit coupled to the first and second active time generation paths. The circuit is operable selectively in a first and a second operational mode wherein the driver node receives the pulse-width modulated drive signal having a first active time value generated in the first active time generation path, or a second active time value generated in the second active time generation path. The second active time generation path includes an active time generator network to provide a second active time value with the second active time value adaptively variable to match the first active time value.
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公开(公告)号：US12046986B2
公开(公告)日：2024-07-23
申请号：US17119571
申请日：2020-12-11
CPC分类号： H02M1/0025 , H02M3/1566 , H02M3/1584 , H02M3/1586 , H02M1/00 , H02M1/0009 , H02M1/15 , H02M3/04 , H02M3/157 , H02M3/1582 , H02M1/0025 , H02M1/0016
摘要： A system may include a power converter configured to receive an input voltage and generate an output voltage and a controller configured to control operation of the power converter based on a comparison of the output voltage with at least one output voltage threshold and set the at least one output voltage threshold based on the input voltage.
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公开(公告)号：US20240241571A1
公开(公告)日：2024-07-18
申请号：US18622502
申请日：2024-03-29
申请人： Apple Inc.
发明人： Shawn Searles , Sanjay Pant , Ludmil N. Nikolov , Tiago Filipe Galhoz Patrao , Enrico Zanetti , Hao Zhou , Vincenzo Bisogno
IPC分类号： G06F1/3296 , H02M1/00 , H02M3/157
CPC分类号： G06F1/3296 , H02M1/0006 , H02M1/0025 , H02M1/007 , H02M3/157
摘要： A power delivery system included in a computer system uses multiple power converter circuits to generate respective voltage levels on multiple power supply nodes. An embodiment of the power delivery system includes an input power converter circuit that generates a voltage level for use by host and follower power converter circuits. The host power converter circuit generates an external demand current that is shared by multiple follower power converter circuits to regulate the voltage level on the multiple power supply nodes. The power delivery system can be scaled to different platforms of the computer system by adjusting the number of follower power converter circuits.
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公开(公告)号：US20240195298A1
公开(公告)日：2024-06-13
申请号：US18583159
申请日：2024-02-21
申请人： ROHM CO., LTD.
发明人： Shidong GUAN
CPC分类号： H02M3/157 , H02M1/0006 , H02M1/32 , H02M1/327 , H02M1/36
摘要： A switching power supply includes a switching output stage configured to generate an output voltage by rectifying and smoothing a switching voltage that is pulse-driven as an output transistor is turned on and off. An oscillation circuit is configured to generate an on signal that alternates between an on period and an off period at a predetermined switching frequency, and a logic circuit is configured to set the on period of the on signal as a maximum on period of the output transistor. The oscillation circuit is configured to skip the off period of the on signal when, despite the output transistor being kept on for the maximum on period, the output voltage drops below a target value.
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公开(公告)号：US11996768B2
公开(公告)日：2024-05-28
申请号：US17524030
申请日：2021-11-11
发明人： Anders Lind
CPC分类号： H02M1/4225 , H02M1/0025 , H02M1/083 , H02M1/4233 , H02M3/157 , H02M1/0054 , H02M7/5388 , Y02B70/10
摘要： An apparatus for controlling a power converter operable to receive a cyclically varying input signal includes a discrete-time, on-time generator coupled to the power converter and configured to regulate an output voltage of the power converter and a controller configured to compare the output voltage of the power converter against a first predetermined range to: obtain a comparison result at a zero-crossing of the cyclically varying input signal and select one of a plurality of operation levels of the discrete-time, on-time generator in response to the comparison result. The plurality of operation levels includes a linear, discrete-time operation level and a nonlinear, discrete-time operation level.
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