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1. 发明授权

US10879811B2 Switching power supply device and semiconductor device 有权
公开(公告)号：US10879811B2
公开(公告)日：2020-12-29
申请号：US16447157
申请日：2019-06-20
申请人： Rohm Co., Ltd.
发明人： Shun Fukushima , Yosuke Fukumoto
IPC分类号： H02M3/335 , H02H7/12 , H02M1/00 , H02M3/156 , H02M3/158
CPC分类号： H02M3/33592 , H02H7/1213 , H02M3/156 , H02M3/158 , H02M2001/0054
摘要： A switching power supply device has a switching output stage generating an output voltage from an input voltage by switching operation and a controller controlling the switching output stage based on a feedback voltage commensurate with the output voltage. The switching power supply device can perform switching suspension control whereby it stops switching operation on detecting a light-load condition based on the feedback voltage, though it restarts switching operation on detection of an overvoltage condition during suspension of switching operation.

2. 发明授权

US08964343B2 Semiconductor device and switching regulator using the device 有权
标题翻译：半导体器件和开关稳压器使用该器件
公开(公告)号：US08964343B2
公开(公告)日：2015-02-24
申请号：US14051792
申请日：2013-10-11
申请人： Rohm Co., Ltd.
发明人： Kazuhiro Murakami , Mikiya Doi , Yosuke Fukumoto
IPC分类号： H02H9/00 , H02M1/32 , H03K17/082 , H02M1/08 , H02M3/156
CPC分类号： H02M1/32 , H02M1/08 , H02M3/156 , H03K17/0822
摘要： The semiconductor device according to the present invention has an n-channel output transistor wherein an input voltage is impressed on a drain, and a pulsed switching voltage that corresponds to a switching drive of the transistor is brought out from a source; a bootstrap circuit for generating a boost voltage enhanced by a predetermined electric potential above the switching voltage; an internal circuit for receiving a supply of the boost voltage to generate a switching drive signal, and supplying the signal to a gate of the output transistor; an overvoltage protection circuit for monitoring an electric potential difference between the switching voltage and the boost voltage, and generating an overvoltage detection signal; and a switching element for establishing/blocking electrical conduction between the internal circuit and the end impressed with the boost voltage, in accordance with the overvoltage detection signal.
摘要翻译：根据本发明的半导体器件具有n沟道输出晶体管，其中输入电压施加在漏极上，并且从源极引出对应于晶体管的开关驱动的脉冲切换电压; 一个自举电路，用于产生一高于开关电压的预定电位增强的升压电压; 内部电路，用于接收升压电压的供给以产生开关驱动信号，并将该信号提供给输出晶体管的栅极; 用于监视开关电压和升压电压之间的电位差的过电压保护电路，以及产生过电压检测信号; 以及用于根据过电压检测信号建立/阻断内部电路和施加有升压电压的端部之间的导通的开关元件。

3. 发明授权

US11368093B2 Switching power supply device 有权
公开(公告)号：US11368093B2
公开(公告)日：2022-06-21
申请号：US17026595
申请日：2020-09-21
申请人： ROHM Co., LTD.
发明人： Shun Fukushima , Yosuke Fukumoto
IPC分类号： H02M3/158 , H02M1/00
摘要： A main control circuit includes a PWM comparator that compares a contrast voltage generated according to a feedback voltage with a ramp voltage having a periodically varying voltage value, and causes an output stage circuit to perform a switching action based on a result of the comparison in the PWM control. A feedback path switch is inserted in a feedback path for propagating a signal according to the feedback voltage to the PWM comparator. The main control circuit controls, upon switching from sleep control that stops the switching action to the PWM control, within a specific period equal to one or more periods of the PWM control, the feedback path switch off and sets a voltage within a variation range of the ramp voltage as an initial voltage for the contrast voltage to thereby start a switching action and controlling the feedback path switch on after the specific period.

4. 发明申请

US20140036556A1 SEMICONDUCTOR DEVICE AND SWITCHING REGULATOR USING THE DEVICE 有权
标题翻译：半导体器件和使用器件的开关稳压器
公开(公告)号：US20140036556A1
公开(公告)日：2014-02-06
申请号：US14051792
申请日：2013-10-11
申请人： Rohm Co., Ltd.
发明人： Kazuhiro Murakami , Mikiya Doi , Yosuke Fukumoto
IPC分类号： H02M1/32 , H02M1/08 , H02M3/156
CPC分类号： H02M1/32 , H02M1/08 , H02M3/156 , H03K17/0822
摘要： The semiconductor device according to the present invention has an n-channel output transistor wherein an input voltage is impressed on a drain, and a pulsed switching voltage that corresponds to a switching drive of the transistor is brought out from a source; a bootstrap circuit for generating a boost voltage enhanced by a predetermined electric potential above the switching voltage; an internal circuit for receiving a supply of the boost voltage to generate a switching drive signal, and supplying the signal to a gate of the output transistor; an overvoltage protection circuit for monitoring an electric potential difference between the switching voltage and the boost voltage, and generating an overvoltage detection signal; and a switching element for establishing/blocking electrical conduction between the internal circuit and the end impressed with the boost voltage, in accordance with the overvoltage detection signal.
摘要翻译：根据本发明的半导体器件具有n沟道输出晶体管，其中输入电压施加在漏极上，并且从源极引出对应于晶体管的开关驱动的脉冲切换电压; 一个自举电路，用于产生一高于开关电压的预定电位增强的升压电压; 内部电路，用于接收升压电压的供给以产生开关驱动信号，并将该信号提供给输出晶体管的栅极; 用于监视开关电压和升压电压之间的电位差的过电压保护电路，以及产生过电压检测信号; 以及用于根据过电压检测信号建立/阻断内部电路和施加有升压电压的端部之间的导通的开关元件。

5. 发明授权

US10680522B2 Switching regulator and control device therefor 有权
公开(公告)号：US10680522B2
公开(公告)日：2020-06-09
申请号：US15890602
申请日：2018-02-07
申请人： Rohm Co., Ltd.
发明人： Yosuke Fukumoto
IPC分类号： H02M3/158 , H02M1/00
摘要： A control device serves as an agent that controls a switching regulator including an output switch and a synchronous rectification switch. The control device includes: a summator generating a sum sense signal by adding up a first sense signal commensurate with the current passing in the output switch and a second sense signal commensurate with the current passing in the synchronous rectification switch; a smoother generating a smoothed sense signal by smoothing the sum sense signal; and a switch driver driving the output switch and the synchronous rectification switch complementarily through current mode control based on the smoothed sense signal.

6. 发明申请

US20180226877A1 SWITCHING REGULATOR AND CONTROL DEVICE THEREFOR 审中-公开
公开(公告)号：US20180226877A1
公开(公告)日：2018-08-09
申请号：US15890602
申请日：2018-02-07
申请人： Rohm Co., Ltd.
发明人： Yosuke Fukumoto
IPC分类号： H02M1/088 , H02M3/158
摘要： A control device serves as an agent that controls a switching regulator including an output switch and a synchronous rectification switch. The control device includes: a summator generating a sum sense signal by adding up a first sense signal commensurate with the current passing in the output switch and a second sense signal commensurate with the current passing in the synchronous rectification switch; a smoother generating a smoothed sense signal by smoothing the sum sense signal; and a switch driver driving the output switch and the synchronous rectification switch complementarily through current mode control based on the smoothed sense signal.

7. 发明授权

US09882484B2 Switching power supply device having pulse-by-pulse type overcurrent protection function 有权
公开(公告)号：US09882484B2
公开(公告)日：2018-01-30
申请号：US15381353
申请日：2016-12-16
申请人： ROHM CO., LTD.
发明人： Yosuke Fukumoto
IPC分类号： H02M3/158 , H02M1/32 , H02M1/08 , H03K17/08 , H02M1/00
CPC分类号： H02M3/158 , H02M1/08 , H02M1/32 , H02M2001/0003 , H02M2001/0009 , H03K17/08
摘要： A switching power supply device includes: a switching output circuit configured to generate an output voltage from an input voltage; an oscillation circuit configured to generate a clock signal; a control circuit configured to control driving of the switching output circuit in synchronization with the clock signal; a pulse-by-pulse type overcurrent protection circuit configured to detect an overcurrent flowing through the switching output circuit to generate an overcurrent protection signal for forcibly stopping a switching operation of the switching output circuit; and a pulse skip circuit configured to perform a pulse skip operation of the clock signal in response to the overcurrent protection signal.

8. 发明授权

US09641078B2 Switching power supply device 有权
公开(公告)号：US09641078B2
公开(公告)日：2017-05-02
申请号：US15189583
申请日：2016-06-22
申请人： Rohm Co., Ltd.
发明人： Yosuke Fukumoto
IPC分类号： G05F1/565 , G05F1/00 , H02M3/158 , H02M1/08 , H02M1/00
CPC分类号： H02M3/158 , H02M1/08 , H02M3/1588 , H02M2001/0009 , H02M2001/0032 , Y02B70/1466 , Y02B70/16
摘要： A switching power supply device includes a switching output circuit, an error amplifier, a slope voltage generating circuit, a PWM comparator, a logic circuit, a switch driving circuit, and a reverse current detection circuit. The slope voltage generating circuit increases a slope voltage from a reset level with a gradient corresponding to an input voltage during an on period of the output transistor, and maintains the slope voltage at an offset level corresponding not to the reset level but to an output voltage during an off period of the output transistor.

9. 发明申请

US20230013839A1 PULSE CONTROL DEVICE 有权
公开(公告)号：US20230013839A1
公开(公告)日：2023-01-19
申请号：US17946721
申请日：2022-09-16
申请人： Rohm Co., Ltd.
发明人： Hiroto OSHITA , Tetsuo Tateishi , Yosuke Fukumoto , Yuhei Yamaguchi , Yoju IMAMURA , Genki Tsuruyama
IPC分类号： H01H47/32 , H02M1/08 , H03K7/08
摘要： A pulse control device 10 comprises: a switch output unit 100 which generates a pulse output voltage Vo from a direct-current input voltage Vi and supplies the pulse output voltage Vo to a load (such as a relay coil 21 of a mechanical relay 20); a low-pass filter unit 300 which receives a feedback input of the pulse output voltage Vo and generates a feedback voltage Vfb; and an output feedback control unit 200 which receives an input of the feedback voltage Vfb and controls the switch output unit 100 so that an average value of the pulse output voltage Vo becomes constant. The low-pass filter unit 300 may be configured without a coil.

10. 发明申请

US20210257913A1 SWITCHING POWER SUPPLY DEVICE 有权
公开(公告)号：US20210257913A1
公开(公告)日：2021-08-19
申请号：US17178768
申请日：2021-02-18
申请人： Rohm Co., Ltd.
发明人： Yosuke Fukumoto , Shun FUKUSHIMA
IPC分类号： H02M3/158 , H02M1/08
摘要： There is provided a switching power supply device, including: an output stage circuit including an output transistor installed between an application end of an input voltage and an application end of an output voltage, and configured to generate the output voltage from the input voltage through a switching operation including an operation of switching the output transistor; and a main control circuit configured to execute PWM control for causing the output stage circuit to perform the switching operation at a predetermined PWM frequency based on a feedback voltage according to the output voltage.

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