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1.发明公开公开(公告)号：US20230198397A1
公开(公告)日：2023-06-22
申请号：US17925529
申请日：2021-05-28
申请人： Rohm Co., Ltd.
发明人： Shingo Hashiguchi , Isao Takobe , Kosuke Sato , Yuhei Yamaguchi
CPC分类号： H02M3/158 , H02M1/0025 , H02M1/0009 , H02M1/0022
摘要： A switching power supply device includes first and second switches connected in series between an application terminal for an input voltage and an application terminal for a voltage lower than the input voltage, and a controller configured to turn on and off the first and second switches. The controller has a first state where it keeps the first switch on and the second switch off, followed by a second state where it keeps the first switch off and the second switch on, followed by a third state where it keeps the first and second switches off, followed by a fourth state where it keeps the voltage at the connection node between the first and second switches lower than in the third state. The controller repeats the first, second, third, and fourth states at a fixed cycle.
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公开(公告)号：US11606033B2
公开(公告)日：2023-03-14
申请号：US17330775
申请日：2021-05-26
申请人： ROHM Co., LTD.
IPC分类号： H02M3/158
摘要： The switching power supply device includes first and second switches connected in series between an application end of an input voltage and an application end of a low voltage lower than the input voltage, and third and fourth switches connected in series between an application end of the input voltage and an application end of the low voltage, and a control unit configured to control the on/off state of each of the first to fourth switches. The first to fourth switches are configured such that an inductor is provided between a first connection node connecting the first switch and the second switch and a second connection node connecting the third switch and the fourth switch.
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公开(公告)号：US11550349B2
公开(公告)日：2023-01-10
申请号：US17283389
申请日：2019-10-21
申请人： ROHM CO., LTD.
摘要： A linear power supply circuit according to the present invention is provided with: an output transistor provided between an input end to which an input voltage is applied and an output end to which an output voltage is applied; a driver for driving the output transistor; and a feedback unit for feeding, back to the driver, information about an output electrical current that is output from the output end. The driver drives the output transistor on the basis of the difference between a voltage based on the output voltage and a reference voltage, as well as the information.
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公开(公告)号：US11515788B2
公开(公告)日：2022-11-29
申请号：US16975538
申请日：2019-01-28
申请人： Rohm Co., Ltd.
发明人： Shingo Hashiguchi
摘要： Provided is a switching control circuit used for a switching power supply device for generating an output voltage from an input voltage. The switching control circuit includes an intermittent operation mode for repeating an active period in which an output switching element of the switching power supply device is switched and an inactive period in which the output switching element is not switched. The switching control circuit is provided with a modulation unit for modulating a pulse frequency of a switching control signal during the active period, and performs control of switching of the output switching element by the switching control signal during the active period.
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公开(公告)号：US20220321007A1
公开(公告)日：2022-10-06
申请号：US17615931
申请日：2020-06-12
申请人： ROHM CO., LTD.
IPC分类号： H02M3/158 , H02M1/088 , H02M1/32 , B60R16/033
摘要： A switching power supply device includes a first switch with a first terminal connectable to an application terminal for the input voltage and a second terminal connectable to the first terminal of an inductor; a second switch with a first terminal connectable to the first terminal of the inductor and a second terminal connectable to an application terminal for a voltage lower than the input voltage; a third switch with a first terminal connectable to the first terminal of the inductor and a second terminal connectable to the second terminal of the inductor; a detector; and a controller. The controller produces, after occurrence or a sign of occurrence of an overshoot in the output voltage is detected by the detector until settlement of the overshoot in the output voltage, a control state in which to keep the first and second switches off and the third switch on.
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公开(公告)号：US20210382510A1
公开(公告)日：2021-12-09
申请号：US17283389
申请日：2019-10-21
申请人： ROHM CO., LTD.
摘要： A linear power supply circuit according to the present invention is provided with: an output transistor provided between an input end to which an input voltage is applied and an output end to which an output voltage is applied; a driver for driving the output transistor; and a feedback unit for feeding, back to the driver, information about an output electrical current that is output from the output end. The driver drives the output transistor on the basis of the difference between a voltage based on the output voltage and a reference voltage, as well as the information.
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公开(公告)号：US20230146300A1
公开(公告)日：2023-05-11
申请号：US17910896
申请日：2021-02-26
申请人： Rohm Co., Ltd.
发明人： Isao Takobe , Shingo Hashiguchi
摘要： An output feedback control circuit includes, for example, a first amplifier 140a configured to generate a first error signal ERR1 commensurate with a difference between an output voltage, which is fed to a load, or a feedback voltage FB commensurate therewith and a reference voltage REF, a second amplifier 140b configured to be faster than the first amplifier 140a and to generate a second error signal ERR2 commensurate with a difference between the output voltage or the feedback voltage FB and the first error signal ERR1 (or the reference voltage REF), a calculator 145 configured to superimpose a remote sense signal RSGND, which is derived from a grounded terminal of the load, on the reference voltage REF, which is fed to the first amplifier 140a, and a capacitor Cc connected between an application terminal for the first error signal ERR1 and an application terminal for the remote sense signal RSGND.
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公开(公告)号：US10673332B2
公开(公告)日：2020-06-02
申请号：US16314475
申请日：2017-08-02
申请人： Rohm Co., Ltd.
发明人： Shingo Hashiguchi , Tetsuo Tateishi
摘要： A switching regulator control circuit, having: a slope circuit 3 for generating a slope voltage VSLP on the basis of a clock signal CLK of a prescribed frequency; an error amplifier 1 for generating an error signal Vc corresponding to the difference between a reference voltage VREF and a voltage VFB corresponding to the output voltage of a switching regulator; a comparator 4 for comparing the error signal Vc and the slope voltage VSLP; and an RS flip-flop 6 set on the basis of the clock signal CLK and reset by a signal outputted by the comparator 4. The timing at which the RS flip-flop 6 is set is delayed with respect to the timing at which the sloping of the slope voltage VSLP is started.
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公开(公告)号：US20190319536A1
公开(公告)日：2019-10-17
申请号：US16314475
申请日：2017-08-02
申请人： Rohm Co., Ltd.
发明人： Shingo Hashiguchi , Tetsuo Tateishi
摘要： A switching regulator control circuit, having: a slope circuit 3 for generating a slope voltage VSLP on the basis of a clock signal CLK of a prescribed frequency; an error amplifier 1 for generating an error signal Vc corresponding to the difference between a reference voltage VREF and a voltage VFB corresponding to the output voltage of a switching regulator; a comparator 4 for comparing the error signal Vc and the slope voltage VSLP; and an RS flip-flop 6 set on the basis of the clock signal CLK and reset by a signal outputted by the comparator 4. The timing at which the RS flip-flop 6 is set is delayed with respect to the timing at which the sloping of the slope voltage VSLP is started.
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公开(公告)号：US20190214911A1
公开(公告)日：2019-07-11
申请号：US16323853
申请日：2017-08-02
申请人： Rohm Co., Ltd.
发明人： Shingo Hashiguchi , Tetsuo Tateishi
IPC分类号： H02M3/158 , B60R16/033
CPC分类号： H02M3/1582 , B60R16/033 , H02M3/155
摘要： Provided is an integrated circuit package which complementarily switches on/off a MOS transistor Q1 (first switch) and MOS transistor Q2 (second switch) in accordance with an output voltage Vout, and which externally outputs a pulse signal having a fixed on-duty D during a step-up/step-down mode. The integrated circuit package has a determination unit 61 for determining the impedance of an external component connected to an external pin P5 that outputs the pulse signal to the exterior during the step-up/step-down mode, and determining whether the external component is a third switch on the basis of the impedance determination result.
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