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公开(公告)号：US09350194B2
公开(公告)日：2016-05-24
申请号：US13911207
申请日：2013-06-06
Applicant: Broadcom Corporation
Inventor： Ryan Michael Desrosiers
CPC classification number: H02J50/12 , H02J7/025 , H02J50/40 , H02J50/80 , H02J2007/0037
Abstract: Disclosed are various embodiments for controlling voltage in a wireless power receiver. A wireless power receiver may comprise an electromagnetic coil configured to receive a current induced by a magnetic flux generated by a wireless power transmitter and a comparator configured to compare a voltage generated by the induced current to a threshold voltage indicating a capability of circuitry coupled to the wireless power receiver. In the event the voltage generated by the induced current exceeds the threshold voltage, the voltage may be limited to a safe value.
Abstract translation: 公开了用于控制无线电力接收机中的电压的各种实施例。 无线电力接收器可以包括被配置为接收由无线电力发射器产生的磁通感应的电流的电磁线圈和被配置为将由感应电流产生的电压与阈值电压进行比较的比较器，该阈值电压指示耦合到 无线电源接收器。 在感应电流产生的电压超过阈值电压的情况下，电压可能被限制在安全值。
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公开(公告)号：US09411387B2
公开(公告)日：2016-08-09
申请号：US14154061
申请日：2014-01-13
Applicant: BROADCOM CORPORATION
Inventor： Prasanna Obala Bhuvanesh , Jay Edward Ackerman , Michael Owen Baker , Ryan Michael Desrosiers
CPC classification number: G06F1/263 , G06F1/26 , G06F1/266 , H02J7/0036 , H02J7/0057 , H02J7/0068 , H02J7/007 , H02J2007/0059 , H02J2007/0095
Abstract: A circuit for a switching charger includes multiple input supply nodes, and a number of charging paths. Each input supply node is connectable to a power source. Each charging path may include a middle node connected to a coupling switch and a pass transistor. The coupling switch may be configured to activate a corresponding charging path of the charging paths. A pre-charging switch may be coupled to a corresponding middle node of each charging path. The pass transistor of an activated one of the charging paths may be configured to provide a switching voltage at an input of a charging sub-circuit. The pre-charging switch may be configurable to pre-charge a middle node of a non-activated path to a high voltage to prevent an unwanted high current passing through a body diode of a corresponding pass transistor of the non-activated path.
Abstract translation: 用于切换充电器的电路包括多个输入电源节点和多个充电路径。 每个输入电源节点可连接到电源。 每个充电路径可以包括连接到耦合开关和传输晶体管的中间节点。 耦合开关可以被配置为激活充电路径的相应充电路径。 预充电开关可以耦合到每个充电路径的相应中间节点。 充电路径中激活的一个的通过晶体管可以被配置为在充电子电路的输入处提供开关电压。 预充电开关可以被配置为将未激活路径的中间节点预充电到高电压，以防止不需要的高电流通过非激活路径的相应的通过晶体管的体二极管。
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公开(公告)号：US20140333142A1
公开(公告)日：2014-11-13
申请号：US13911207
申请日：2013-06-06
Applicant: Broadcom Corporation
Inventor： Ryan Michael Desrosiers
IPC: H02J17/00
CPC classification number: H02J50/12 , H02J7/025 , H02J50/40 , H02J50/80 , H02J2007/0037
Abstract: Disclosed are various embodiments for controlling voltage in a wireless power receiver. A wireless power receiver may comprise an electromagnetic coil configured to receive a current induced by a magnetic flux generated by a wireless power transmitter and a comparator configured to compare a voltage generated by the induced current to a threshold voltage indicating a capability of circuitry coupled to the wireless power receiver. In the event the voltage generated by the induced current exceeds the threshold voltage, the voltage may be limited to a safe value.
Abstract translation: 公开了用于控制无线电力接收机中的电压的各种实施例。 无线电力接收器可以包括被配置为接收由无线电力发射器产生的磁通感应的电流的电磁线圈和被配置为将由感应电流产生的电压与阈值电压进行比较的比较器，该阈值电压指示耦合到 无线电源接收器。 在感应电流产生的电压超过阈值电压的情况下，电压可能被限制在安全值。
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公开(公告)号：US20170126021A1
公开(公告)日：2017-05-04
申请号：US14954095
申请日：2015-11-30
Applicant: BROADCOM CORPORATION
Inventor： Ryan Michael Desrosiers , Mark David Rutherford , John Stuart Walley , Vadim Bishtein , Angel Arturo Polo
IPC: H02J5/00
CPC classification number: H02J5/005 , H02J7/0029 , H02J50/12 , H02J50/80 , H02J2007/0059 , H02J2007/0096
Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver configured to receive a wireless power signal from a power transmitting unit. A rectifier includes a plurality of switching circuits configured to generate a rectified voltage from the wireless power signal, based on switch control signals that include a switch-on signal and a switch-off signal for corresponding ones of the plurality of switching circuits. A rectifier control circuit generates the switch control signals based on predicted switching delays. Other embodiments are disclosed.
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公开(公告)号：US10218225B2
公开(公告)日：2019-02-26
申请号：US15233859
申请日：2016-08-10
Applicant: Broadcom Corporation
Inventor： Ryan Michael Desrosiers
Abstract: A device and circuits are provided for wireless power transfer (WPT) gate-drive power reduction. A WPT receiver circuit includes a receive coil to couple to a transmit coil of a WPT transmitter circuit. A rectification circuit is coupled to the receive coil to generate a rectified voltage. The rectification circuit is a bridge rectifier circuit including a first set of field-effect transistors (FETs). One or more gate-drive control circuits improve power dissipation of the rectification circuit by controlling drive voltages of gate terminals of the first set of FET switches after start-up of the WPT receiver circuit.
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Patent Agency Ranking
公开(公告)号：US20150255989A1
公开(公告)日：2015-09-10
申请号：US14243411
申请日：2014-04-02
Applicant: Broadcom Corporation
Inventor： John Stuart Walley , Ryan Michael Desrosiers
CPC classification number: H02J5/005 , H01F38/14 , H02J7/0086 , H02J7/025 , H02J50/12 , H02J50/80 , H02J50/90 , H02M7/217 , H04B5/0037
Abstract: A device includes support for wireless power transfer. The device may control the timing of switching devices in a rectifier circuit and implement resonant tuning techniques that facilitate the wireless power transfer, e.g., by purposefully introducing a real or complex impedance chosen to meet a current operating goal. The device may use the techniques in connection with wireless charging or wireless provision of power to run the device, as examples.
Abstract translation: 一种设备包括对无线电力传输的支持。 该装置可以控制整流器电路中的开关器件的定时，并且实现便于无线功率传输的谐振调谐技术，例如通过有目的地引入被选择以满足当前操作目标的实际或复阻抗。 作为示例，该设备可以使用与无线充电或无线提供电力相关的技术来运行设备。
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公开(公告)号：US20150048839A1
公开(公告)日：2015-02-19
申请号：US13973403
申请日：2013-08-22
Applicant: Broadcom Corporation
Inventor： Ryan Michael Desrosiers
IPC: G01R31/36
CPC classification number: G01R19/0092 , G01R1/203 , G01R31/3648 , G01R35/005 , H02J7/0047
Abstract: Accurate charge measurement based on a calibration factor is described. According to certain aspects, the amount of charge stored in a battery is accumulated over time and adjusted using a calibration factor. In one embodiment, the calibration factor is determined by generating a replica current which comprises a scaled factor of a battery charging current. A calibration reference voltage is measured based on the replica current, and a charge reference voltage is measured based on the battery charging current. A calibration factor is determined based on the charge reference voltage and the calibration reference voltage. In turn, the amount of charge in a battery is accumulated over time using the calibration factor. In various embodiments, the calibration factor provides a factor by which a relatively-low tolerance reference circuit is adjusted, to achieve higher accuracy without substantially increased cost.
Abstract translation: 描述了基于校准因子的精确电荷测量。 根据某些方面，存储在电池中的电荷量随时间累积并使用校准因子进行调整。 在一个实施例中，通过产生包含电池充电电流的缩放因子的复制电流来确定校准因子。 基于复制电流测量校准参考电压，并且基于电池充电电流来测量充电参考电压。 基于充电参考电压和校准参考电压确定校准因子。 反过来，使用校准因子，电池中的电荷量随时间累积。 在各种实施例中，校准因子提供了一个因素，通过该因子相对低的公差参考电路被调节，以实现更高的精度而没有显着增加的成本。
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公开(公告)号：US10476302B2
公开(公告)日：2019-11-12
申请号：US15279323
申请日：2016-09-28
Applicant: Broadcom Corporation
Inventor： John Stuart Walley , Ryan Michael Desrosiers , Vadim Bishtein
Abstract: A wireless power transfer (WPT) receiver circuit includes a receive coil to couple to a transmit coil of a WPT transmitter circuit. A rectifier is coupled to the receive coil to generate a rectified voltage. The rectifier comprises a bridge rectifier circuit including a first set of switching elements. A load modulation circuit facilitates communication between the WPT receiver circuit and the WPT transmitter circuit. The load modulation circuit includes a single modulation capacitor and one or more modulation switching elements. At least one node of one of the modulation switching elements is connected to an input node of the rectifier.
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公开(公告)号：US09871386B2
公开(公告)日：2018-01-16
申请号：US14954095
申请日：2015-11-30
Applicant: BROADCOM CORPORATION
Inventor： Ryan Michael Desrosiers , Mark David Rutherford , John Stuart Walley , Vadim Bishtein , Angel Arturo Polo
IPC: H02J5/00
CPC classification number: H02J5/005 , H02J7/0029 , H02J50/12 , H02J50/80 , H02J2007/0059 , H02J2007/0096
Abstract: Aspects of the subject disclosure may include, for example, a power receiving unit having a wireless power receiver configured to receive a wireless power signal from a power transmitting unit. A rectifier includes a plurality of switching circuits configured to generate a rectified voltage from the wireless power signal, based on switch control signals that include a switch-on signal and a switch-off signal for corresponding ones of the plurality of switching circuits. A rectifier control circuit generates the switch control signals based on predicted switching delays. Other embodiments are disclosed.
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公开(公告)号：US20150137766A1
公开(公告)日：2015-05-21
申请号：US14154061
申请日：2014-01-13
Applicant: BROADCOM CORPORATION
Inventor： Prasanna OBALA BHUVANESH , Jay Edward Ackerman , Michael Owen Baker , Ryan Michael Desrosiers
IPC: H02J7/00
CPC classification number: G06F1/263 , G06F1/26 , G06F1/266 , H02J7/0036 , H02J7/0057 , H02J7/0068 , H02J7/007 , H02J2007/0059 , H02J2007/0095
Abstract: A circuit for a switching charger includes multiple input supply nodes, and a number of charging paths. Each input supply node is connectable to a power source. Each charging path may include a middle node connected to a coupling switch and a pass transistor. The coupling switch may be configured to activate a corresponding charging path of the charging paths. A pre-charging switch may be coupled to a corresponding middle node of each charging path. The pass transistor of an activated one of the charging paths may be configured to provide a switching voltage at an input of a charging sub-circuit. The pre-charging switch may be configurable to pre-charge a middle node of a non-activated path to a high voltage to prevent an unwanted high current passing through a body diode of a corresponding pass transistor of the non-activated path.
Abstract translation: 用于切换充电器的电路包括多个输入电源节点和多个充电路径。 每个输入电源节点可连接到电源。 每个充电路径可以包括连接到耦合开关和传输晶体管的中间节点。 耦合开关可以被配置为激活充电路径的相应充电路径。 预充电开关可以耦合到每个充电路径的相应中间节点。 充电路径中激活的一个的通过晶体管可以被配置为在充电子电路的输入处提供开关电压。 预充电开关可以被配置为将未激活路径的中间节点预先充电到高电压，以防止不期望的高电流通过非激活路径的相应的通过晶体管的体二极管。
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