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公开(公告)号：US12074515B2
公开(公告)日：2024-08-27
申请号：US18458750
申请日：2023-08-30
申请人： pSemi Corporation
发明人： Aichen Low , Gregory Szczeszynski , David Giuliano
IPC分类号： H02M3/07
摘要： An apparatus for power conversion includes a switching network that controls interconnections between pump capacitors in a capacitor network that has a terminal coupled to a current source, and a charge-management subsystem. In operation, the switching network causes the capacitor network to execute charge-pump operating cycles during each of which the capacitor network adopts different configurations in response to different configurations of the switching network. At the start of a first charge-pump operating cycle, each pump capacitor assumes a corresponding initial state. The charge-management subsystem restores each pump capacitor to the initial state by the start of a second charge-pump operating cycle that follows the first charge-pump operating cycle.
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公开(公告)号：US11955885B2
公开(公告)日：2024-04-09
申请号：US18049302
申请日：2022-10-25
申请人： pSemi Corporation
CPC分类号： H02M3/07 , H02M3/073 , H02M1/0003 , H02M3/075
摘要： An apparatus for converting a first voltage into a second voltage includes a reconfigurable switched capacitor power converter having a selectable conversion gain. The power converter has switch elements configured to electrically interconnect capacitors to one another and/or to the first or second voltage in successive states. The switch elements are configured to interconnect at least some capacitors to one another through the switch elements. A controller causes the reconfigurable switched capacitor power converter to transition between first and second operation modes. The controller minimizes electrical transients arising from transition between modes. In the first operating mode, the power converter operates with a first conversion gain. In the second operating mode, it operates with a second conversion gain.
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公开(公告)号：US11929677B2
公开(公告)日：2024-03-12
申请号：US18172732
申请日：2023-02-22
申请人： pSemi Corporation
发明人： Brian Zanchi , Gregory Szczeszynski , Aichen Low , Chak Sang Ngai
IPC分类号： H02M3/158 , G01R19/165 , H03K5/24 , H02M1/00
CPC分类号： H02M3/158 , G01R19/16538 , H03K5/24 , H02M1/0012 , H02M1/0025
摘要： Circuits and methods for reducing lagging responses of a power converter to changes in circuit voltages or current, over-shoot/under-shoot when a target output voltage changes faster than the power converter's response, and open loop conditions. Embodiments include scanning a feedback voltage from a load powered by a voltage output by a power converter controlled by a PWM control signal; detecting an under-regulation condition; and, while the under-regulation condition is detected, increasing a clock signal rate to a counter outputting a count value usable to generate the PWM control signal. Embodiments include comparing a target output voltage to a signal representative of an output voltage of the power converter; indicating an under-shoot or over-shoot condition if the voltage difference exceeds a corresponding offset value; and limiting the range of values for an M-bit count value used to generate the PWM control signal to mitigate the under-shoot or over-shoot condition.
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公开(公告)号：US11901817B2
公开(公告)日：2024-02-13
申请号：US18348924
申请日：2023-07-07
申请人： pSemi Corporation
摘要： Transient or fault conditions for a switched capacitor power converter are detected by measuring one or more of internal voltages and/or currents associated with switching elements (e.g., transistors) or phase nodes, or voltages or currents at terminals of the converter, and based on these measurements detect that a condition has occurred when the measurements deviate from a predetermined range. Upon detection of the condition fault control circuitry alters operation of the converter, for example, by using a high voltage switch to electrically disconnect at least some of the switching elements from one or more terminals of the converter, or by altering timing characteristics of the phase signals.
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公开(公告)号：US20230412078A1
公开(公告)日：2023-12-21
申请号：US18333403
申请日：2023-06-12
申请人： pSemi Corporation
CPC分类号： H02M3/158 , H02M1/0009 , H02M1/0025
摘要： Circuits and methods for adding a Current Mode signal into a Voltage Mode controller for fixed-frequency DC-to-DC power converters. A current-controlled voltage source (CCVS) generates a voltage proportional to the power converter output current, which voltage is combined with a comparison signal generated by comparing a target output voltage to the actual output voltage. The modified comparison signal generates a pulse-width modulation control signal that regulates the power converter output as a function of output voltage and some portion of output current. With the addition of an inductor current signal into the controller Voltage Mode feedback loop, the double pole predominant in constant conduction mode (CCM) mode can be smoothed over to improve stability, while discontinuous conduction mode (DCM) loop response is largely unchanged with or without the added Current Mode signal. Embodiments enable simplified compensation while covering a wider operating range.
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公开(公告)号：US11811304B2
公开(公告)日：2023-11-07
申请号：US17455671
申请日：2021-11-19
申请人： pSemi Corporation
CPC分类号： H02M1/32 , H02M1/0009 , H02M1/0095 , H02M3/158 , H02M3/07
摘要： Disclosed embodiments may include a power converter having a power conversion circuit and a protection circuit. The power conversion circuit is electrically coupled between a first terminal and a second terminal, to convert a first voltage from the first terminal to a second voltage outputted at the second terminal. The protection circuit is electrically coupled between an input terminal of the power converter and the first terminal. The protection circuit includes a first protection device and a clamping circuit. The first protection device withstands an input voltage of the power converter to continue an operation of the power conversion circuit when the input voltage exceeds a voltage threshold value. The clamping circuit is electrically coupled to a control terminal of the first protection device to clamp a control voltage of the first protection device.
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公开(公告)号：US20230268836A1
公开(公告)日：2023-08-24
申请号：US17679572
申请日：2022-02-24
申请人： pSemi Corporation
IPC分类号： H02M3/158
CPC分类号： H02M3/1582 , H02M3/1584
摘要： Circuits and methods for sensing output current of a power converter, controlling output current in multiple parallel power converters, and enabling reconfigurability of output control for multiple parallel power converters. One embodiment includes a current sensing circuit configured to be coupled to a power converter, the current sensing circuit configured to receive a first voltage representative of an output current of the power converter and output a low-frequency filtered second voltage based on the first voltage and a high-frequency filtered third voltage based on the first voltage. In some embodiments, the first voltage is generated by sensing an output current of the power converter and converting the sensed output current to the first voltage. Other embodiments include a plurality of power stages and corresponding current sensing circuits, wherein the outputs of the low-frequency filters of the current sensing circuits are coupled in common.
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公开(公告)号：US20230198376A1
公开(公告)日：2023-06-22
申请号：US17555754
申请日：2021-12-20
申请人： pSemi Corporation
CPC分类号： H02M1/088 , H02M1/0009 , H02M3/158
摘要： A switching power converter architecture that is efficient across its entire power range, regardless of load level, by partitioning the power devices into segments for optimal gate drive and providing a local variable-voltage driver for each power device segment. Power device segments may be selectively enabled or disabled based on the level of power to be delivered to a load. In addition, an adaptive gate drive scheme enables dynamic control of the RON and QG values for each power converter device so that the power devices may operate at the lowest RON value at or near maxi-mum power levels for reduced conduction losses, at the lowest RON×QG product value at mid-level loads for peak efficiency, and at the lowest QG value at light loads for reduced switching losses.
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公开(公告)号：US11496046B2
公开(公告)日：2022-11-08
申请号：US17307921
申请日：2021-05-04
申请人： pSemi Corporation
发明人： Aichen Low , Gregory Szczeszynski , David Giuliano
IPC分类号： H02M3/07
摘要： An apparatus for power conversion includes a switching network that controls interconnections between pump capacitors in a capacitor network that has a terminal coupled to a current source, and a charge-management subsystem. In operation, the switching network causes the capacitor network to execute charge-pump operating cycles during each of which the capacitor network adopts different configurations in response to different configurations of the switching network. At the start of a first charge-pump operating cycle, each pump capacitor assumes a corresponding initial state. The charge-management subsystem restores each pump capacitor to the initial state by the start of a second charge-pump operating cycle that follows the first charge-pump operating cycle.
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公开(公告)号：US11177735B2
公开(公告)日：2021-11-16
申请号：US16849869
申请日：2020-04-15
申请人： pSemi Corporation
摘要： During its first and second residence times, corresponding first and second currents flow between a charge pump and a circuit that connects to one of the charge pump's terminals. Based on a feedback measurement from the charge pump, a controller adjusts these first and second currents.
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