-
公开(公告)号：US20240353881A1
公开(公告)日：2024-10-24
申请号：US18763318
申请日：2024-07-03
Applicant: ROHM CO., LTD.
Inventor： Daisuke UCHIMOTO
Abstract: A linear power supply circuit includes: an output stage including a first and a second output transistor connected in parallel between an input terminal to which an input voltage is applied and an output terminal to which an output voltage is applied; a driver configured to drive the first and second output transistors according to the difference between a voltage based on the output voltage and a reference voltage; and a potential difference suppressor configured to suppress the potential difference between the control terminals of the first and second output transistors. The potential difference suppressor includes an operational amplifier. The non-inverting input terminal of the operational amplifier is connected to the control terminal of the first output transistor. The inverting input terminal and the output terminal of the operational amplifier are connected to the control terminal of the second output transistor. The operational amplifier includes a phase compensation element.
-
公开(公告)号：US20240170956A1
公开(公告)日：2024-05-23
申请号：US18507235
申请日：2023-11-13
Applicant: ROHM CO., LTD.
Inventor： Daisuke UCHIMOTO , Shugo KAMINOTA
Abstract: A signal output circuit includes a comparator including a first input terminal, a second input terminal, and a third input terminal, and one of an inverter provided between an enable terminal configured to receive an enable signal and the first input terminal, and a pull-up resistor connected to the first input terminal, wherein the first input terminal is configured to be supplied with a signal based on the enable signal, wherein the second input terminal is configured to be supplied with a basis voltage, wherein the third input terminal is configured to be supplied with an abnormality detection signal, and wherein the first input terminal and the second input terminal have different polarities from each other.
-
公开(公告)号：US20160197513A1
公开(公告)日：2016-07-07
申请号：US15067594
申请日：2016-03-11
Applicant: ROHM CO., LTD.
Inventor： Daisuke UCHIMOTO , Tatsuya IWASAKI
CPC classification number: H02J50/10 , H02J7/025 , H02J7/04 , H02J7/042 , H02J50/12 , H02J50/80 , H04B5/0037 , H04B5/0093
Abstract: A rectifier circuit is coupled to a reception coil, and generates a rectified voltage. A charger circuit receives the rectified voltage, and charges a secondary battery. A modulator coupled to the reception coil modulates a voltage or a current applied to the reception coil based on a control value, and transmits a control packet including the control value to a wireless power transmitter. A charging control unit controls a charging current supplied from the charger circuit to the secondary battery. A power control unit generates a control error value indicating a power transmission rate for the wireless power transmitter, based on the difference between the present rectified voltage and its target value, and outputs the control error value as the control value to the modulator. When the absolute value of the difference is smaller than a predetermined threshold value, the charging control unit changes the charging current.
Abstract translation: 整流电路与接收线圈耦合，产生整流电压。 充电器电路接收整流电压，并对二次电池充电。 耦合到接收线圈的调制器基于控制值调制施加到接收线圈的电压或电流，并将包括控制值的控制分组发送到无线电力发送器。 充电控制单元控制从充电器电路向二次电池供应的充电电流。 功率控制单元根据当前整流电压与目标值之间的差产生指示无线电力发射机的功率传输速率的控制误差值，并将控制误差值作为控制值输出给调制器。 当差的绝对值小于预定阈值时，充电控制单元改变充电电流。
-
公开(公告)号：US20230411312A1
公开(公告)日：2023-12-21
申请号：US18333977
申请日：2023-06-13
Applicant: ROHM Co., LTD.
Inventor： Daisuke UCHIMOTO
IPC: H01L23/62 , H01L23/00 , H03K17/082
CPC classification number: H01L23/62 , H01L24/48 , H03K17/0822 , H01L2224/48175 , G05F1/573
Abstract: Disclosed herein is a semiconductor chip including a power transistor, a plurality of pads, a plurality of wires arranged to establish continuity between each of the plurality of pads and a first end or a second end of the power transistor, a current detection circuit configured to detect, as a sense voltage, at least one of voltage drops caused in each of the plurality of wires according to a branch current flowing through the wire and a wire resistance component of the wire, and a logic configured to determine a condition of wire bonding of each of the plurality of pads according to a result of the detection by the current detection circuit.
-
5.发明申请公开(公告)号：US20180131234A1
公开(公告)日：2018-05-10
申请号：US15804548
申请日：2017-11-06
Applicant: ROHM CO., LTD.
Inventor： Daisuke UCHIMOTO
CPC classification number: H02J50/12 , G05F1/46 , H02J50/80 , H02M7/04 , H04B5/0031 , H04B5/0037 , H04B5/0081
Abstract: A wireless power receiver that receives a power signal from a wireless power transmitter includes: a receiving antenna including a receiving coil for receiving the power signal; a rectifying circuit configured to rectify an alternating current flowing through the receiving antenna; a smoothing capacitor configured to smooth an output of the rectifying circuit; an overvoltage detecting circuit configured to compare a rectified voltage generated in the smoothing capacitor with an overvoltage threshold; a modulator configured to change a parallel resonance frequency of the receiving antenna; and a discharging circuit configured to be switched between an enable state and a disable state and configured to enter the enable state during a communication period by the modulator to discharge the smoothing capacitor.
-
Patent Agency Ranking
公开(公告)号：US20170346344A1
公开(公告)日：2017-11-30
申请号：US15605130
申请日：2017-05-25
Applicant: ROHM CO., LTD.
Inventor： Daisuke UCHIMOTO
Abstract: A reception antenna includes a reception coil which receives a power signal. A rectification circuit rectifies an alternating current flowing to the reception antenna. A smoothing capacitor smoothes an output of the rectification circuit. A waveform stabilizer is enabled when a power receiver satisfies a predetermined condition and shifts a parallel resonance frequency of the reception antenna.
-
公开(公告)号：US20150207338A1
公开(公告)日：2015-07-23
申请号：US14676181
申请日：2015-04-01
Applicant: ROHM CO., LTD.
Inventor： Daisuke UCHIMOTO , Naoki INOUE , Tatsuya IWASAKI
CPC classification number: H02J5/005 , H02J7/025 , H02J17/00 , H02J50/10 , H02M2001/0006 , H02M2007/2195 , Y02B70/1408
Abstract: A wireless power receiver circuit forms a wireless power receiving apparatus together with a reception coil. An internal power supply line is connected to a capacitor C. An output line is connected to a secondary battery. An H-bridge circuit includes N-channel MOSFETs MH1, MH2, ML1, and ML2. A first switch is arranged between a rectification line and the internal power supply line. A second switch is arranged between the rectification line and the output line. A voltage VDD of the internal power supply line is supplied to a power supply terminal of a controller.
Abstract translation: 无线电力接收电路与接收线圈一起形成无线电力接收装置。 内部电源线连接到电容器C.输出线连接到二次电池。 H桥电路包括N沟道MOSFET MH1，MH2，ML1和ML2。 在整流线和内部电源线之间布置第一开关。 在整流线和输出线之间布置有第二开关。 内部电源线的电压VDD被提供给控制器的电源端子。
-
公开(公告)号：US20230411311A1
公开(公告)日：2023-12-21
申请号：US18333879
申请日：2023-06-13
Applicant: ROHM Co., LTD.
Inventor： Daisuke UCHIMOTO
IPC: H01L23/62 , H01L23/00 , H03K17/082
CPC classification number: H01L23/62 , H01L24/48 , H03K17/0822 , H01L2224/48175
Abstract: Disclosed herein is a semiconductor chip including a power transistor, a plurality of pads, a plurality of wirings each configured to provide electrical continuity between each of the plurality of pads and one end of the power transistor, and a current detection circuit configured to detect, as a sense voltage, at least one of voltage drops occurring in the plurality of wirings, respectively, according to a shunt current flowing through each of the plurality of wirings and a wiring resistance component of each of the plurality of wirings.
-
公开(公告)号：US20190123582A1
公开(公告)日：2019-04-25
申请号：US16223856
申请日：2018-12-18
Applicant: ROHM CO., LTD.
Inventor： Daisuke UCHIMOTO , Tatsuya IWASAKI
Abstract: A rectifier circuit is coupled to a reception coil, and generates a rectified voltage. A charger circuit receives the rectified voltage, and charges a secondary battery. A modulator coupled to the reception coil modulates a voltage or a current applied to the reception coil based on a control value, and transmits a control packet including the control value to a wireless power transmitter. A charging control unit controls a charging current supplied from the charger circuit to the secondary battery. A power control unit generates a control error value indicating a power transmission rate for the wireless power transmitter, based on the difference between the present rectified voltage and its target value, and outputs the control error value as the control value to the modulator. When the absolute value of the difference is smaller than a predetermined threshold value, the charging control unit changes the charging current.
-
公开(公告)号：US20160285313A1
公开(公告)日：2016-09-29
申请号：US15141008
申请日：2016-04-28
Applicant: ROHM CO., LTD.
Inventor： Naoki INOUE , Daisuke UCHIMOTO , Kazuyoshi YASUOKA
CPC classification number: H02J50/12 , G01R21/06 , G01R31/40 , H02J5/005 , H02J7/025 , H02J50/10 , H02J50/60 , H02J50/80
Abstract: A power receiving apparatus is configured including a control circuit together with a reception coil, a rectifier circuit, a smoothing capacitor, and a modulator. A received power calculation unit calculates an electric power consumption PD of the wireless power receiving apparatus based on a predetermined calculation expression. A parameter acquisition unit acquires a first parameter α and a second parameter β via an external component. A correction unit calculates a received electric power PRP of the wireless power receiving apparatus according to a correction expression PRP=α×PD+β.
Abstract translation: 电力接收装置被配置为包括与接收线圈，整流电路，平滑电容器和调制器一起的控制电路。 接收功率计算单元基于预定的计算式来计算无线电力接收装置的电力消耗PD。 参数获取单元经由外部部件获取第一参数α和第二参数β。 校正单元根据校正表达式PRP =α×PD +β来计算无线电力接收装置的接收电力PRP。
-
-
-
-
-
-
-
-
-
Search Results
15
records
(took 0.016 seconds)
