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公开(公告)号：US11177730B2
公开(公告)日：2021-11-16
申请号：US16656344
申请日：2019-10-17
发明人： Keng Chen , Luca Petruzzi
摘要： An apparatus such as a DC-DC power converter including a switch, an ON-time controller, and a compensator operates in a constant ON-time control mode. Over multiple control cycles, the ON-time controller controls an ON-time duration of activating the switch and generation of an output voltage to power a dynamic load. The compensator, in communication with the ON-time controller, adjusts the ON-time duration of activating the switch depending on a magnitude of output current delivered by the output voltage to the dynamic load. For example, during heavier load conditions when the dynamic load consumes a higher amount of current, and in which internal resistive losses of the power supply become more substantial, the compensator increases the ON-time duration of activating the switch, resulting in operation of the power supply and switch closer to a desired frequency setpoint.
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公开(公告)号：US20210247788A1
公开(公告)日：2021-08-12
申请号：US16783522
申请日：2020-02-06
发明人： Keng Chen , Luca Petruzzi
摘要： A power supply includes a voltage converter to produce an output voltage to power a load. The power supply further includes a reference voltage generator and a controller. The reference voltage generator is operative to generate a floor reference voltage that varies as a function of the output voltage depending on a setting of one or more adjustable (programable) resistor-capacitor paths in the floor reference voltage generator. The controller produces control signals to control the voltage converter as a function of the floor reference voltage and the output voltage.
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公开(公告)号：US20200220448A1
公开(公告)日：2020-07-09
申请号：US16821156
申请日：2020-03-17
发明人： Keng Chen , Luca Petruzzi
摘要： A power supply includes a reference voltage generator, a power supply phase, and an adjustor. During operation, the reference voltage generator produces a reference voltage. The power supply phase produces an output voltage to power a load as a function of an output voltage feedback signal derived from the output voltage and the reference voltage. The adjustor adjusts a magnitude of the reference voltage to maintain regulation of the output voltage with respect to a desired voltage setpoint.
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公开(公告)号：US10651797B2
公开(公告)日：2020-05-12
申请号：US15948398
申请日：2018-04-09
发明人： Keng Chen , Luca Petruzzi
摘要： An apparatus includes a first amplifier, a second amplifier, and a compensation-setting generator to generate a first amplifier compensation setting and second amplifier compensation setting. A controller is operable to: i) apply the first amplifier compensation setting to the first amplifier and apply the second amplifier compensation setting to the second amplifier. The controller is further operable to switch between generating updates to the first amplifier compensation setting and the second amplifier compensation setting.
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公开(公告)号：US10298123B2
公开(公告)日：2019-05-21
申请号：US15614799
申请日：2017-06-06
发明人： Danny Clavette , Kang Peng , Keng Chen , Mark A. Crowther
摘要： A power supply includes a reference voltage generator circuit, a ramp generator circuit, and control circuitry. During operation, the reference voltage generator circuit compares a magnitude of a received output voltage feedback signal to a received reference voltage. Based on the comparison, the reference voltage generator circuit produces a varying reference voltage and outputs it to the ramp generator circuit. As its name suggests, a magnitude of the varying reference voltage varies over time. The ramp generator circuit produces a ramp voltage signal, a magnitude of which is offset by the varying reference voltage. To maintain an output voltage of the power supply within regulation, the control circuitry receives the varying reference voltage and controls activation of a power converter circuit to power a load based on a comparison of the ramp voltage signal and the output voltage feedback signal of the power supply.
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公开(公告)号：US20210376724A1
公开(公告)日：2021-12-02
申请号：US16884794
申请日：2020-05-27
发明人： Keng Chen , James R. Garrett
IPC分类号： H02M3/157
摘要： A power converter includes a switch, an ON-time controller, and a compensator. Over multiple control cycles, the ON-time controller controls an ON-time duration of a control signal driving the switch. Activation of the switch generates an output voltage that powers a dynamic load. The ON-time controller controls attributes such as a switching frequency and/or an ON-time duration of the control signal driving the switch to regulate the output voltage. A phase-locked loop in the compensator supplies the ON-time controller with adjustment signals that adjust the ON-time duration of activating the switch to maintain the switching frequency at a desired setpoint. Thus, if a transient load condition causes the ON-time controller to temporarily operate the switch to at a value other than the desired setpoint frequency, the phase-locked loop of the compensator causes the switching frequency to align with the desired switching frequency again over one or more control cycles.
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公开(公告)号：US20200007021A1
公开(公告)日：2020-01-02
申请号：US16024576
申请日：2018-06-29
发明人： Keng Chen , Luca Petruzzi
摘要： A power supply includes a reference voltage generator, a power supply phase, and an adjustor. During operation, the reference voltage generator produces a reference voltage. The power supply phase produces an output voltage to power a load as a function of an output voltage feedback signal derived from the output voltage and the reference voltage. The adjustor adjusts a magnitude of the reference voltage to maintain regulation of the output voltage with respect to a desired voltage setpoint.
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公开(公告)号：US10461641B2
公开(公告)日：2019-10-29
申请号：US15909382
申请日：2018-03-01
发明人： Anthony B. Candage , Keng Chen , Paul Sisson
摘要： A power supply includes a power converter, a reference voltage generator, and a controller. During operation, the power converter produces an output voltage to power a load. The reference voltage generator (such as a voltage mode amplifier circuit) generates a floor reference voltage, a magnitude of which varies as a function of the output voltage. The controller compares an output voltage feedback signal (derived from the output voltage) to the floor reference voltage to produce control output to control timing of activating switches in the power converter to maintain the output voltage within a desired voltage range.
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公开(公告)号：US20190312551A1
公开(公告)日：2019-10-10
申请号：US15948398
申请日：2018-04-09
发明人： Keng Chen , Luca Petruzzi
摘要： An apparatus includes a first amplifier, a second amplifier, and a compensation-setting generator to generate a first amplifier compensation setting and second amplifier compensation setting. A controller is operable to: i) apply the first amplifier compensation setting to the first amplifier and apply the second amplifier compensation setting to the second amplifier. The controller is further operable to switch between generating updates to the first amplifier compensation setting and the second amplifier compensation setting.
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公开(公告)号：US20190273435A1
公开(公告)日：2019-09-05
申请号：US15909382
申请日：2018-03-01
发明人： Anthony B. Candage , Keng Chen , Paul Sisson
摘要： A power supply includes a power converter, a reference voltage generator, and a controller. During operation, the power converter produces an output voltage to power a load. The reference voltage generator (such as a voltage mode amplifier circuit) generates a floor reference voltage, a magnitude of which varies as a function of the output voltage. The controller compares an output voltage feedback signal (derived from the output voltage) to the floor reference voltage to produce control output to control timing of activating switches in the power converter to maintain the output voltage within a desired voltage range.
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