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公开(公告)号：US10389222B2
公开(公告)日：2019-08-20
申请号：US15684576
申请日：2017-08-23
Applicant: Apple Inc.
Inventor： Dashun Xue
Abstract: Systems, apparatuses, and methods for efficiently generating a stable output voltage for one or more components are described. In various embodiments, current sensing circuitry within a power converter includes one or more current mirrors in addition to at least a first resistor, a second resistor, a switch and a bias current source. The sizes of these latter components scales the sensing current output of the current sensing circuitry from a value of an inductor current flowing through the low pass filter output of the power converter. In addition, the sizes generate an offset which maintains the sensing current as a positive value even when the inductor current becomes a negative value. The boosted sensing current makes a zero detection function and a protection function for the power converter relatively simple with current comparisons.
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公开(公告)号：US20200350819A1
公开(公告)日：2020-11-05
申请号：US16399290
申请日：2019-04-30
Applicant: Apple Inc.
Inventor： Michael Couleur , Yesim Inam , Dashun Xue
Abstract: A power converter circuit that includes a switch node coupled to a regulated power supply node via an inductor may, during a discharge cycle, sink current from the regulated power supply node. A control circuit may generate the rising and falling ramp signals using voltage levels of an input power supply node and the regulated power supply node. The control circuit may also determine a duration of the discharge cycle using results of comparing respective voltage levels of the generated rising and falling ramp signals.
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公开(公告)号：US20190068046A1
公开(公告)日：2019-02-28
申请号：US15684576
申请日：2017-08-23
Applicant: Apple Inc.
Inventor： Dashun Xue
CPC classification number: H02M1/08 , G01R17/02 , H02M1/32 , H02M3/158 , H02M2001/0009
Abstract: Systems, apparatuses, and methods for efficiently generating a stable output voltage for one or more components are described. In various embodiments, current sensing circuitry within a power converter includes one or more current mirrors in addition to at least a first resistor, a second resistor, a switch and a bias current source. The sizes of these latter components scales the sensing current output of the current sensing circuitry from a value of an inductor current flowing through the low pass filter output of the power converter. In addition, the sizes generate an offset which maintains the sensing current as a positive value even when the inductor current becomes a negative value. The boosted sensing current makes a zero detection function and a protection function for the power converter relatively simple with current comparisons.
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公开(公告)号：US20180248481A1
公开(公告)日：2018-08-30
申请号：US15444594
申请日：2017-02-28
Applicant: Apple Inc.
Inventor： Michael Couleur , Fabio Ongaro , Dashun Xue
IPC: H02M3/158
CPC classification number: H02M3/158
Abstract: A regulator circuit that employs coupled inductors with on-time modulation is disclosed. The regulator circuit includes a driver circuit coupled via first and second inductors to a power supply node of a load circuit, and may charge the power supply node via the first inductor for a first charging period, and charge the power supply node via the second inductor for a second charging period. A control circuit may determine durations of the first and second charging periods using respective pluralities of currents.
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Patent Agency Ranking
公开(公告)号：US11171563B2
公开(公告)日：2021-11-09
申请号：US16399290
申请日：2019-04-30
Applicant: Apple Inc.
Inventor： Michael Couleur , Yesim Inam , Dashun Xue
Abstract: A power converter circuit that includes a switch node coupled to a regulated power supply node via an inductor may, during a discharge cycle, sink current from the regulated power supply node. A control circuit may generate the rising and falling ramp signals using voltage levels of an input power supply node and the regulated power supply node. The control circuit may also determine a duration of the discharge cycle using results of comparing respective voltage levels of the generated rising and falling ramp signals.
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公开(公告)号：US10425009B2
公开(公告)日：2019-09-24
申请号：US16113832
申请日：2018-08-27
Applicant: Apple Inc.
Inventor： Michael Couleur , Fabio Ongaro , Dashun Xue
IPC: H02M3/158
Abstract: A regulator circuit that employs coupled inductors with on-time modulation is disclosed. The regulator circuit includes a driver circuit coupled via first and second inductors to a power supply node of a load circuit, and may charge the power supply node via the first inductor for a first charging period, and charge the power supply node via the second inductor for a second charging period. A control circuit may determine durations of the first and second charging periods using respective pluralities of currents.
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公开(公告)号：US20180367038A1
公开(公告)日：2018-12-20
申请号：US16113832
申请日：2018-08-27
Applicant: Apple Inc.
Inventor： Michael Couleur , Fabio Ongaro , Dashun Xue
IPC: H02M3/158
CPC classification number: H02M3/158 , H02M3/1584 , H02M2003/1586
Abstract: A regulator circuit that employs coupled inductors with on-time modulation is disclosed. The regulator circuit includes a driver circuit coupled via first and second inductors to a power supply node of a load circuit, and may charge the power supply node via the first inductor for a first charging period, and charge the power supply node via the second inductor for a second charging period. A control circuit may determine durations of the first and second charging periods using respective pluralities of currents.
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公开(公告)号：US10146240B1
公开(公告)日：2018-12-04
申请号：US15886700
申请日：2018-02-01
Applicant: Apple Inc.
Inventor： Ruopeng Wang , Dashun Xue , Jiandong Jiang , Jay B. Fletcher
Abstract: A voltage regulator having a pre-regulator circuit is disclosed. A low dropout (LDO) voltage regulator includes an amplifier circuit, a current buffer circuit, and a pre-regulator circuit. The current buffer circuit includes a transistor having a gate terminal coupled to the amplifier output. The current buffer provides a current based at least in part on the output signal generated by the amplifier. The pre-regulator circuit is coupled to provide a dynamic supply voltage to the current buffer. They dynamic supply voltage depends at least in part on a fixed supply voltage provided thereto, as well as the output voltage provided by the LDO voltage regulator.
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公开(公告)号：US10063145B1
公开(公告)日：2018-08-28
申请号：US15444594
申请日：2017-02-28
Applicant: Apple Inc.
Inventor： Michael Couleur , Fabio Ongaro , Dashun Xue
Abstract: A regulator circuit that employs coupled inductors with on-time modulation is disclosed. The regulator circuit includes a driver circuit coupled via first and second inductors to a power supply node of a load circuit, and may charge the power supply node via the first inductor for a first charging period, and charge the power supply node via the second inductor for a second charging period. A control circuit may determine durations of the first and second charging periods using respective pluralities of currents.
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