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11. 发明授权

US09048676B2 Charging circuit and charging method 有权
标题翻译：充电电路和充电方式
公开(公告)号：US09048676B2
公开(公告)日：2015-06-02
申请号：US12903644
申请日：2010-10-13
申请人： Takahiro Tsuji , Keiichi Ashida
发明人： Takahiro Tsuji , Keiichi Ashida
IPC分类号： H02J7/04 , H02J7/00
CPC分类号： H02J7/0068
摘要： A charging circuit that simultaneously charges a battery with an electrical current supplied from an external power source and supplies the electrical current supplied from the external power source to a load includes a power supply circuit to supply an electrical current from the battery to the load when a load current required by the load is greater than a maximum supply current of the external power source, a detector to detect a voltage of the battery, and a controller to control power supply to the load as well as charging the battery. When the detected voltage of the battery is lower than the predetermined threshold, the controller stops supplying the electrical current from the battery to the load and charges the battery with the electrical current supplied from the external power source.
摘要翻译：一种充电电路，其以从外部电源提供的电流同时对电池充电并且将从外部电源提供的电流供应到负载包括电源电路，用于在电池供电时将电流从电池供应到负载负载所需的负载电流大于外部电源的最大供电电流，检测电池电压的检测器，以及控制对负载的电源以及对电池充电的控制器。当电池的检测电压低于预定阈值时，控制器停止向电池供应电流，并以从外部电源提供的电流对电池充电。

12. 发明授权

US09584019B2 Switching regulator and control method thereof 有权
标题翻译：开关调节器及其控制方法
公开(公告)号：US09584019B2
公开(公告)日：2017-02-28
申请号：US14425517
申请日：2013-09-03
申请人： Yohichi Shiwaya
发明人： Yohichi Shiwaya
IPC分类号： G05F1/56 , H02M3/158 , H02M3/156 , H02M1/00
CPC分类号： H02M3/158 , H02M3/156 , H02M3/1588 , H02M2001/0009 , H02M2001/0032 , Y02B70/1466 , Y02B70/16
摘要： A switching regulator including an output switch element; a rectification switch element; an oscillation circuit; an error amplifier circuit; a slope circuit; a first voltage comparison circuit; a second voltage comparison circuit; a one pulse generation circuit; a control circuit; and a backflow detection circuit, and a control method thereof suppress variations to be stabilized with respect to a target value of the load current for switching between a PWM control and a PFM control, and ensure the switching from the PFM control to the PWM control or from the PWM control to the PFM control even if various parameters including external elements such as chips, coils, and capacitors vary.
摘要翻译：一种开关调节器，包括输出开关元件; 整流开关元件; 振荡电路; 误差放大器电路; 斜坡电路; 第一电压比较电路; 第二电压比较电路; 一脉冲发生电路; 一个控制电路; 逆流检测电路及其控制方法抑制PWM控制与PFM控制之间切换的负载电流的目标值的稳定化，并且确保从PFM控制切换到PWM控制，即使包括诸如芯片，线圈和电容器等外部元件的各种参数变化，也可以从PWM控制到PFM控制。

13. 发明授权

US09413243B2 Non-insulating type switching power supply device 有权
标题翻译：非绝缘型开关电源装置
公开(公告)号：US09413243B2
公开(公告)日：2016-08-09
申请号：US14021092
申请日：2013-09-09
申请人： Shohtaroh Sohma
发明人： Shohtaroh Sohma
IPC分类号： H02M3/158 , H02M1/44 , H02M1/00
CPC分类号： H02M3/1588 , H02M1/44 , H02M2001/0054 , Y02B70/1466 , Y02B70/1491
摘要： A switching power supply device includes a first control circuit that turns a first switch on when first and second switches are off and a voltage at a junction node therebetween is increased to decrease a voltage across the first switch to a first threshold voltage, turns off when a first ON-period has elapsed from when the first switch is turned on, and lengthens the first ON-period as an output voltage decreases relative to a reference voltage; and a second control circuit that turns the second switch on when both switches are off and a voltage across the second switch is decreased to a second threshold voltage, turns off when a reverse current flows through the inductor, sufficient to increase the voltage at the junction node to decrease the voltage across the first switch to the first threshold voltage after the second switch is turned off.
摘要翻译：开关电源装置包括：第一控制电路，其在第一和第二开关断开时使第一开关接通，并且其间的接点处的电压增加，以将第一开关两端的电压降低到第一阈值电压，当第从第一开关导通开始经过第一导通周期，并且随着输出电压相对于参考电压而减小第一导通周期; 以及第二控制电路，当两个开关断开并且第二开关两端的电压降低到第二阈值电压时，使第二开关接通，当反向电流流经电感器时，该开关关断，足以增加接点处的电压节点，在第二开关断开之后，将第一开关两端的电压降低到第一阈值电压。

14. 发明授权

US09103893B2 Voltage monitor semiconductor device, battery pack, and electronic device employing battery pack 有权
标题翻译：电压监视器半导体器件，电池组和采用电池组的电子器件
公开(公告)号：US09103893B2
公开(公告)日：2015-08-11
申请号：US13414967
申请日：2012-03-08
申请人： Daisuke Kanzaki
发明人： Daisuke Kanzaki
IPC分类号： G01R31/36 , H02J7/00
CPC分类号： G01R31/3658 , G01R31/362 , H02J7/0021 , H02J2007/0037 , H02J2007/004
摘要： A voltage monitor semiconductor device to monitor voltages of multiple rechargeable devices to output a detection result signal to indicate overcharge, over-discharge, or excess-current, the voltage monitor semiconductor device including multiple voltage input terminals, corresponding to the multiple rechargeable devices, to monitor the voltages of the corresponding rechargeable devices as monitor voltages; and a test signal generation circuit to generate a first test signal that inverts when at least one of the monitor voltages falls below a predetermined first threshold voltage that is not used normally as an abnormal state.
摘要翻译：一种电压监视器半导体器件，用于监测多个可再充电器件的电压以输出检测结果信号以指示过充电，过放电或过电流，所述电压监视器半导体器件包括对应于所述多个可再充电器件的多个电压输入端子，监控相应可充电装置的电压作为监视电压; 以及测试信号产生电路，用于产生当至少一个监视电压下降到不正常使用的预定的第一阈值电压作为异常状态时反转的第一测试信号。

15. 发明授权

US09069366B2 Switching regulator 有权
标题翻译：开关稳压器
公开(公告)号：US09069366B2
公开(公告)日：2015-06-30
申请号：US13773994
申请日：2013-02-22
申请人： Kiyohito Hara
发明人： Kiyohito Hara
IPC分类号： G05F1/00 , G05F1/10
CPC分类号： G05F1/10 , H02M1/32 , H02M1/36 , H02M3/156
摘要： A switching regulator includes a switching element to generate an output voltage, a reference voltage source to generate a reference voltage, a soft-start circuit to set the reference voltage increasing gradually within a range, an error amplifier circuit to generate an error difference voltage indicating an error difference between the reference voltage and feedback voltage of the output voltage of the switching regulator, a switching circuit to generate a switching signal to control the switching element in response to the error difference voltage, and a current limiting circuit to generate a limiting signal indicating a comparison result between an current into the switching element and a limit being set to increase within a range, wherein the switching circuit controls a duty cycle of the switching signal so that the current through the switching element does not exceed the limit in response to the limiting signal.
摘要翻译：开关稳压器包括用于产生输出电压的开关元件，产生参考电压的基准电压源，将参考电压设定在一定范围内逐渐增加的软启动电路，误差放大器电路，产生指示开关调节器的输出电压的参考电压和反馈电压之间的误差差，响应于误差电压产生开关信号以控制开关元件的开关电路，以及用于产生限制信号的限流电路指示在开关元件中的电流与在一定范围内被设定为增加的限制之间的比较结果，其中开关电路控制开关信号的占空比，使得通过开关元件的电流不超过响应于限制信号。

16. 发明公开

US20230333587A1 REFERENCE VOLTAGE GENERATOR CIRCUIT SUCH AS BAND GAP REFERENCE VOLTAGE GENERATOR CIRCUIT, AND METHOD OF GENERATING REFERENCE VOLTAGE (as amended) 审中-公开
公开(公告)号：US20230333587A1
公开(公告)日：2023-10-19
申请号：US17596338
申请日：2021-05-31
申请人： RICOH ELECTRONIC DEVICES CO., LTD.
发明人： Yohkoh HIROSE , Kaoru NAKANO
IPC分类号： G05F3/24 , G05F1/567 , G05F3/26
CPC分类号： G05F3/245 , G05F1/567 , G05F3/267
摘要： A reference voltage generator circuit includes a band gap reference voltage circuit that generates a predetermined reference voltage, and a first correction current generator circuit that generates a first correction current in response to change in temperature. The first correction current generator circuit generates a plurality of voltage peaks in response to the change in temperature in the output voltage of the reference voltage generator circuit by injecting the first correction current into the band gap reference voltage circuit, and output voltage characteristics configuring each of the plurality of voltage peaks are made such that the output voltage varies continuously with respect to the change in temperature. The first correction current generator circuit includes a temperature setting circuit that can change the plurality of temperatures corresponding to each of the plurality of voltage peaks.

17. 发明申请

US20220117056A1 LIGHTING SYSTEM PROVIDED WITH DIMMER APPARATUS AND LIGHTING EQUIPMENT 有权
公开(公告)号：US20220117056A1
公开(公告)日：2022-04-14
申请号：US17276518
申请日：2020-05-21
申请人： RICOH ELECTRONIC DEVICES CO., LTD.
发明人： Shohtaroh SOHMA
IPC分类号： H05B45/325 , H05B47/185 , H05B45/14
摘要： A lighting system is provided with a dimmer apparatus and lighting equipment that are connected to each other via a two-wire power supply line. The dimmer apparatus generates a DC voltage including a dimming PWM signal having a PWM amplitude corresponding to a dimming control signal, and outputs the DC voltage to the lighting equipment. The lighting equipment includes at least one light emitting element that emits light by a DC current based on the DC voltage, and a current control circuit. The second control circuit modulates the dimming PWM signal included in the DC voltage, and controls brightness of the light emitting element, so that a DC current corresponding to a duty ratio of a modulated dimming PWM signal flows through the light emitting element based on the duty ratio of the dimming PWM signal.

18. 发明授权

US11223184B2 Semiconductor laser driver having electronic dimming function without using optical components 有权
公开(公告)号：US11223184B2
公开(公告)日：2022-01-11
申请号：US16644238
申请日：2018-09-05
申请人： RICOH ELECTRONIC DEVICES CO., LTD.
发明人： Daijiro Sumino
IPC分类号： H01S5/042 , H01S5/062
摘要： A first current generator circuit generates a first current having a current value variable in accordance with a first control signal. A second current generator circuit generates a second current by limiting the first current so as to have a current value variable in accordance with a second control signal. A third current generator circuit generates a third current by limiting the second current so as to have a current value variable in accordance with a third control signal, and supplies the third current to the semiconductor laser element. Rates at which the first and second control signals change are set to be lower than a rate at which the third control signal changes.

19. 发明申请

US20190058323A1 OVERVOLTAGE PROTECTION CIRCUIT FOR PROTECTING OVERVOLTAGE CORRESPONDING TO WIDE RANGE OF INPUT VOLTAGE 审中-公开
公开(公告)号：US20190058323A1
公开(公告)日：2019-02-21
申请号：US16052136
申请日：2018-08-01
申请人： RICOH ELECTRONIC DEVICES CO., LTD. , NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
发明人： Shohtaroh SOHMA , Yuji TAKEYAMA , Kimihiro NISHIJIMA
IPC分类号： H02H7/125 , H02M7/06 , H02M3/335
摘要： An overvoltage protection circuit is provided which is connected between a rectifier circuit and a load including an input capacitor element connected to both ends of the load. The overvoltage protection circuit includes a semiconductor switch connected between the rectifier circuit and the load, and a control circuit controls the semiconductor switch. When the rectified voltage exceeds a predetermined value, the control circuit turns off the semiconductor switch, and detects a voltage potential difference between both ends of the semiconductor switch, and then, for an interval when the voltage potential difference is zero or a predetermined minute value, the control circuit generates a control voltage for turning on the semiconductor switch, and outputs the control voltage to a control terminal of the semiconductor switch. The overvoltage protection circuit includes a current change circuit that gradually changes a current flowing through the semiconductor switch.

20. 发明授权

US09148133B2 Trimming circuit, power supply including trimming circuit, and trimming method 有权
标题翻译：微调电路，电源包括微调电路和修整方法
公开(公告)号：US09148133B2
公开(公告)日：2015-09-29
申请号：US13948587
申请日：2013-07-23
申请人： Tatsuya Irisawa
发明人： Tatsuya Irisawa
IPC分类号： G05F1/10 , H03K5/00 , H02J7/00 , H02M3/157 , H02M1/00
CPC分类号： H03K5/00 , H02J7/007 , H02M3/157 , H02M2001/0009 , H02M2001/0025
摘要： A trimming circuit, installed in a semiconductor integrated circuit that has multiple different target values, the trimming circuit to adjusts circuit characteristics of the semiconductor integrated circuit to make output values of the semiconductor integrated circuit correspond to multiple desired target values and includes a setting-value table memory to store multiple setting value groups respectively containing different combinations of multiple setting values related to the multiple target values; a trimming cell circuit to store first selection information indicating one group of the multiple setting-value groups stored in the setting-value table memory; and a selector to select one group from the multiple setting-value group stored in the setting-value table memory based on the first selection information, and select one setting value from multiple setting values in the selected setting-value group based on external second selection information to output the selected setting value.
摘要翻译：一种安装在具有多个不同目标值的半导体集成电路中的微调电路，该微调电路用于调整半导体集成电路的电路特性以使半导体集成电路的输出值对应于多个期望的目标值，并且包括设定值表存储器，用于存储分别包含与多个目标值相关的多个设定值的不同组合的多个设定值组; 修整单元电路，用于存储指示存储在设定值表存储器中的多个设定值组的一组的第一选择信息; 以及选择器，其基于所述第一选择信息从存储在所述设定值表存储器中的所述多个设定值组中选择一个组，并且基于所述外部第二选择从所选择的设定值组中的多个设定值中选择一个设定值输出所选设定值的信息。

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