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公开(公告)号：US20210119540A1
公开(公告)日：2021-04-22
申请号：US17071041
申请日：2020-10-15
Applicant: ROHM Co., LTD.
Inventor： Akihiro KAWANO , Yuhei YAMAGUCHI
Abstract: A switching power supply device includes first to fourth switches sequentially connected in series, an inductor, a first capacitor whose first end is connected to a connection node of the first switch and the second switch and whose second end is connected to a connection node of the third switch, the fourth switch, and the inductor, a second capacitor whose first end is connected to a connection node of the second switch and the third switch, and a controller that controls switching on and off of the first to fourth switches. In at least one of a first pair configured with the first switch and the third switch and a second pair configured with the second switch and the fourth switch, the controller shifts a timing of switching from off to on between two switches.
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2.发明申请公开(公告)号：US20130335047A1
公开(公告)日：2013-12-19
申请号：US13920249
申请日：2013-06-18
Applicant: Rohm Co., Ltd.
Inventor： Yuhei YAMAGUCHI
IPC: G05F1/46
CPC classification number: G05F1/468 , H02M3/156 , H02M2001/0006
Abstract: A power supply device includes: a control circuit that turns on and off an output transistor to generate an output voltage from an input voltage; an internal power supply voltage generation circuit that generates an internal power supply voltage from an external power supply voltage; and a power switching circuit that switches supply of the internal power supply voltage and supply of the output voltage as a drive voltage of the control circuit.
Abstract translation: 电源装置包括：控制电路，其导通和关断输出晶体管以从输入电压产生输出电压; 内部电源电压生成电路，其从外部电源电压生成内部电源电压; 以及电源切换电路，其切换内部电源电压的供给和输出电压的供给作为控制电路的驱动电压。
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3.发明公开公开(公告)号：US20240333157A1
公开(公告)日：2024-10-03
申请号：US18742699
申请日：2024-06-13
Applicant: ROHM CO., LTD.
Inventor： Kosuke SATO , Tetsuo TATEISHI , Shingo HASHIGUCHI , Isao TAKOBE , Yuhei YAMAGUCHI
CPC classification number: H02M3/158 , B60R16/005 , H02M1/32
Abstract: 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 being a GaN semiconductor element and connectable in parallel with the inductor; a detector detecting occurrence or a sign or occurrence of an overshoot in the output voltage; 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：US20190115914A1
公开(公告)日：2019-04-18
申请号：US16151770
申请日：2018-10-04
Applicant: ROHM CO., LTD.
Inventor： Tetsuo TATEISHI , Hiroto OSHITA , Yuhei YAMAGUCHI
IPC: H03K17/20
CPC classification number: H03K17/20 , H03K17/063
Abstract: A diving circuit drives an output transistor according to a control signal SCTRL. The gate of the first transistor is biased. The source of the first transistor is coupled to an internal line. In the on period of the output transistor, the voltage of the internal line is applied to a control electrode of the output transistor. A voltage correction circuit controls the internal line so as to gradually lower the voltage VREGB of the internal line with time.
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Patent Agency Ranking
公开(公告)号：US20180262110A1
公开(公告)日：2018-09-13
申请号：US15916350
申请日：2018-03-09
Applicant: Rohm Co., Ltd.
Inventor： Shun FUKUSHIMA , Yuhei YAMAGUCHI
CPC classification number: H02M3/158 , H02M1/08 , H02M1/32 , H02M3/156 , H02M2001/0009 , H02M2001/0025 , H02M2001/0035 , Y02B70/16
Abstract: A DC-DC converter generates an output voltage from an input voltage through current-mode control output feedback control using a current sense signal commensurate with a sampled value obtained by sampling a coil current in a switching output stage, for example, at the midpoint of the ON period or the OFF period of the switching output stage.
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公开(公告)号：US20160373009A1
公开(公告)日：2016-12-22
申请号：US15133384
申请日：2016-06-28
Applicant: Rohm Co., Ltd.
Inventor： Tetsuo TATEISHI , Yuhei YAMAGUCHI , Shingo HASHIGUCHI , Kiyotaka UMEMOTO
Abstract: In a switching regulator, a first switch and a second switch are turned ON and OFF complementarily according to an output voltage. In a step-up/down mode, a third switch and a fourth switch are turned ON and OFF complementarily while the ON-duty D of the third switch is kept fixed.
Abstract translation: 在开关调节器中，第一开关和第二开关根据输出电压互补地导通和截止。 在升压/降压模式下，第三开关和第四开关互补地接通和断开，同时第三开关的导通占空比D保持固定。
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公开(公告)号：US20170182894A1
公开(公告)日：2017-06-29
申请号：US15387787
申请日：2016-12-22
Applicant: ROHM CO., LTD.
Inventor： Yuhei YAMAGUCHI , Tetsuo TATEISHI
CPC classification number: H02M3/1582 , H02M2001/0009
Abstract: A switching regulator for generating an output voltage from an input voltage includes a first to fourth switches and is configured to fix an on-duty ratio of the third switch in a step-up/down mode. The switching regulator performs current mode control according to the information of current flowing through the second switch. A step-down control circuit includes a slope voltage generation part that generates a slope voltage, and generates a step-down control signal according to the slope voltage. The slope voltage generation part switches between a first operation of combining a first ramp voltage to stored information of the current to generate the slope voltage and a second operation of combining a second ramp voltage having a slope smaller than a slope of the first ramp voltage to stored information of the current to generate the slope voltage.
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8.发明申请公开(公告)号：US20130334877A1
公开(公告)日：2013-12-19
申请号：US13920517
申请日：2013-06-18
Applicant: Rohm Co., Ltd.
Inventor： Yuhei YAMAGUCHI
IPC: G05F1/10
Abstract: A power supply device includes: a comparator that compares an error voltage and a slope voltage to generate a comparison signal; a PWM pulse generation portion that generates a PWM pulse based on a clock signal and the comparison signal; an on-time fixed pulse generation portion that uses the comparison signal as a trigger to generate an on-time fixed pulse where an on-time and an on-time number are constant; a selector that selects any one of the PWM pulse and the on-time fixed pulse; and a selector control portion that generates a selector control signal such that any one of the PWM pulse and the on-time fixed pulse is selected according to whether or not the comparison signal is kept at the same logic level over a predetermined mask period.
Abstract translation: 电源装置包括：比较器，用于比较误差电压和斜率电压以产生比较信号; PWM脉冲产生部，其基于时钟信号和所述比较信号生成PWM脉冲; 使用比较信号作为触发的导通时间固定脉冲发生部，生成导通时间和导通时间数恒定的导通时间固定脉冲; 选择器，其选择PWM脉冲和导通时间固定脉冲中的任何一个; 以及选择器控制部，其生成选择器控制信号，使得根据比较信号是否在预定屏蔽周期内保持相同的逻辑电平来选择PWM脉冲和导通时间固定脉冲中的任一个。
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9.发明申请公开(公告)号：US20130334876A1
公开(公告)日：2013-12-19
申请号：US13920465
申请日：2013-06-18
Applicant: ROHM CO., LTD.
Inventor： Yuhei YAMAGUCHI
IPC: G05F1/10
Abstract: A power supply device includes: a comparator that compares an error voltage and a slope voltage to generate a comparison signal; a PWM pulse generation portion that generates a PWM pulse based on a clock signal and the comparison signal; an on-time fixed pulse generation portion that uses the comparison signal as a trigger to generate an on-time fixed pulse where an on-time and an on-time number are constant; a one shot pulse generation portion that generates once, when a soft start voltage exceeds a predetermined threshold voltage, a one shot pulse where the on-time and the on-time number are constant; and a selector that selects any one of the PWM pulse, the on-time fixed pulse and the one shot pulse.
Abstract translation: 电源装置包括：比较器，用于比较误差电压和斜率电压以产生比较信号; PWM脉冲产生部，其基于时钟信号和所述比较信号生成PWM脉冲; 使用比较信号作为触发的导通时间固定脉冲发生部，生成导通时间和导通时间数恒定的导通时间固定脉冲; 单脉冲发生部分，当软启动电压超过预定阈值电压时，产生一次触发脉冲，其中导通时间和导通时间数是恒定的; 以及选择器，其选择PWM脉冲，接通时间固定脉冲和单次脉冲中的任何一个。
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