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公开(公告)号：US20250079908A1
公开(公告)日：2025-03-06
申请号：US18432657
申请日：2024-02-05
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: A wireless power transmitter and methods to: determine a transmitter frequency bandwidth of the wireless power transmitter when no wireless power receiver is inductively coupled with the wireless power transmitter; determine a transmitter-receiver frequency bandwidth when a wireless power receiver is inductively coupled with the wireless power transmitter; compare the transmitter-receiver frequency bandwidth and the transmitter frequency bandwidth; and detect a foreign object near the transmit coil based on the comparison of the transmitter-receiver frequency bandwidth and the transmitter frequency bandwidth.
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公开(公告)号：US20240088893A1
公开(公告)日：2024-03-14
申请号：US18243723
申请日：2023-09-08
Applicant: Microchip Technology Incorporated
Inventor： Andreas Reiter , Yong Yuenyongsgool , Stephen Bowling , Tim Phoenix , Alex Dumais , Justin Oshea
IPC: H03K17/693 , H03K17/687
CPC classification number: H03K17/693 , H03K17/6871
Abstract: A device includes a PWM circuit to generate a complementary PWM signal comprised of a positive polarity PWM signal and a negative polarity PWM signal. The positive polarity signal may drive a high-side switch. A trigger multiplexer may take as input the negative polarity PWM signal and may force an output based on a predetermined condition, the predetermined condition including but not limited to the maximum on-time of a low-side switch. The output of the trigger multiplexer may drive a low-side switch. The high-side switch and the low-side switch may drive a load.
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公开(公告)号：US20240022257A1
公开(公告)日：2024-01-18
申请号：US18095933
申请日：2023-01-11
Applicant: Microchip Technology Incorporated
Inventor： Andreas Reiter , Yong Yuenyongsgool , Stephen Bowling , John Day , Alex Dumais , Justin Oshea
IPC: H03M1/56
CPC classification number: H03M1/56
Abstract: A device including an input to receive a clock signal, a ramp start program register, a ramp start active register, a ramp stop program register, a ramp stop active register, a ramp slope program register, a ramp slope active register, an update controller, the update controller to update, based on a programmable condition, respectively, the ramp start active register contents, the ramp stop active register contents and the ramp slope active register contents, and a ramp controller to generate a ramp signal, the ramp signal to begin at the value reflective of the ramp start active register contents, the ramp signal to change value at each cycle of the clock signal based on the value reflective of the ramp slope active register contents, and the ramp signal to stop at the value reflective of the ramp stop active register contents.
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公开(公告)号：US20230393923A1
公开(公告)日：2023-12-07
申请号：US18096163
申请日：2023-01-12
Applicant: Microchip Technology Incorporated
Inventor： Andreas Reiter , Yong Yuenyongsgool , Stephen Bowling , Alex Dumais , Justin Oshea , Sankar Rangarajan
IPC: G06F11/07
CPC classification number: G06F11/0772 , G06F11/0781 , G06F11/076
Abstract: A fault event monitor and filter having a digital comparator receiving a digital input value, wherein the digital comparator generates a plurality of outputs based on programmable threshold input values, a first counter coupled to a first output of the plurality of outputs of the digital comparator, a second counter coupled to a second output of the plurality of outputs of the digital comparator, and an output controller with a first input coupled to an output of the first counter and with a second input coupled to an output of the second counter, wherein the output controller to generate a fault event signal based at least partially on signals received from the first and second counters.
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公开(公告)号：US20230369901A1
公开(公告)日：2023-11-16
申请号：US18316923
申请日：2023-05-12
Applicant: Microchip Technology Incorporated
Inventor： Alex Dumais , Santosh Bhandarkar
CPC classification number: H02J50/60 , G01R19/2509 , H02J50/10
Abstract: Foreign object detection and related apparatuses, methods, and systems are disclosed. An apparatus includes one or more inductive coils to wirelessly couple with another inductive coil, a series capacitor electrically connected in series with the one or more inductive coils, and a controller to determine a coil current through the one or more inductive coils responsive to a capacitor voltage potential difference across the series capacitor and determine a coil power responsive to the determined coil current and a coil voltage potential difference across the one or more inductive coils.
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Patent Agency Ranking
16.发明授权公开(公告)号：US11223232B2
公开(公告)日：2022-01-11
申请号：US16843697
申请日：2020-04-08
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Various embodiments relate to digital demodulation for wireless power transmission. A wireless power transmitter includes a transmitter coil and a controller. The transmitter coil is configured to wirelessly couple to a receiver coil of a wireless power receiver to transfer power to the wireless power receiver responsive to a coil current applied to the transmitter coil. The wireless power receiver is configured to modulate at least one electrical condition of the wireless power receiver to modulate the coil current at the transmitter coil. The controller is configured to sample one or more electrical signals of the wireless power transmitter, and digitally demodulate the sampled one or more electrical signals to obtain a communication received from the wireless receiver responsive to the modulation of the at least one electrical condition of the wireless power receiver.
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17.发明申请公开(公告)号：US20200381946A1
公开(公告)日：2020-12-03
申请号：US16843697
申请日：2020-04-08
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Various embodiments relate to digital demodulation for wireless power transmission. A wireless power transmitter includes a transmitter coil and a controller. The transmitter coil is configured to wirelessly couple to a receiver coil of a wireless power receiver to transfer power to the wireless power receiver responsive to a coil current applied to the transmitter coil. The wireless power receiver is configured to modulate at least one electrical condition of the wireless power receiver to modulate the coil current at the transmitter coil. The controller is configured to sample one or more electrical signals of the wireless power transmitter, and digitally demodulate the sampled one or more electrical signals to obtain a communication received from the wireless receiver responsive to the modulation of the at least one electrical condition of the wireless power receiver.
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公开(公告)号：US20190052179A1
公开(公告)日：2019-02-14
申请号：US16052208
申请日：2018-08-01
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: A circuit arrangement for switched boundary mode power conversion, a corresponding signal processor and a method of switched boundary mode power conversion are provided. The circuit arrangement comprises an input for receiving an input voltage from a power supply, an output to provide an output voltage to a load, an energy storage device, a controllable switching device, and a signal processor. The signal processor is connected to the controllable switching device and being configured for zero-current switching of the switching device, wherein the signal processor is further configured to determine at least one switching point for the zero-current switching from a first voltage signal and a second voltage signal, wherein the first voltage signal corresponds to the input voltage and the second voltage signal corresponds to the output voltage.
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19.发明申请公开(公告)号：US20190052168A1
公开(公告)日：2019-02-14
申请号：US16051872
申请日：2018-08-01
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: A circuit arrangement, signal processor, and method for interleaved switched boundary mode power conversion are disclosed. The circuit arrangement comprises at least an input for receiving an alternating input voltage from a power supply; an output to provide an output voltage to a load; a first interleaved circuit comprising: a first energy storage device; and a first controllable switching device; and one or more secondary interleaved circuits, each comprising: a secondary energy storage device; and a secondary controllable switching device; and a signal processor. The signal processor is connected to the controllable switching devices and comprises at least a first switching cycle controller, configured for cycled zero-current switching operation of the first controllable switching device; and one or more secondary switching cycle controllers, configured for cycled zero-current switching operation of the one or more secondary controllable switching devices The signal processor is configured to disable one or more of the interleaved circuits when the alternating input voltage is lower than a first threshold voltage to reduce the zero-crossing time.
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公开(公告)号：US20240405612A1
公开(公告)日：2024-12-05
申请号：US18679564
申请日：2024-05-31
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: A method comprises generating a wireless power transmission signal in one or more transmit coils of a wireless power transmitter and, in a multi-frequency operation of the wireless power transmitter, controlling an operating frequency of the wireless power transmission signal to repeatedly switch between a fundamental frequency and one of a lower frequency and an upper frequency in an alternating manner. The lower frequency is offset from the fundamental frequency by a first offset. The upper frequency is offset from the fundamental frequency by a second offset. The second offset is different from the first offset. The first offset associated with the lower frequency and the second offset associated with the upper frequency are to ensure a transmit power in the multi-frequency operation is substantially the same as a transmit power at the fundamental frequency.
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