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公开(公告)号：US20240170995A1
公开(公告)日：2024-05-23
申请号：US17989032
申请日：2022-11-17
Applicant: Renesas Electronics America Inc.
Inventor： Yen-Mo Chen , Rahul Ramesh , Shahriar Jalal Nibir , Sungkeun Lim
CPC classification number: H02J7/34 , H02J7/0063
Abstract: Systems and methods for bi-directional power flow control using a single battery charger are described. According to one example, a semiconductor device is generally described. The semiconductor device may include a charger configured to supply power from a charging interface to a battery in a forward mode, and supply power from the battery to a load in a reverse mode. The semiconductor device may include a first isolation switch disposed between the charging interface and the charger, a second isolation switch disposed between the charger and the load, and a controller configured to enable the first isolation switch and operate the charger in the forward mode, and enable the second isolation switch and operate the charger in the reverse mode.
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公开(公告)号：US12136836B2
公开(公告)日：2024-11-05
申请号：US17479214
申请日：2021-09-20
Applicant: Renesas Electronics America Inc.
Inventor： Sungkeun Lim , Yen-Mo Chen , Keeho Shin
Abstract: Battery charger systems and apparatuses are described. In an example, an apparatus may include a first controller, a first port connected to the first controller, a first charger module connected to the first controller, a second controller, a second port connected to the second controller, and a second charger module connected to the second controller. The first controller may be configured to form a first connection path between the first charger module and the second port via the second controller. The first controller may be further configured to form a second connection path between the second charger module and the first port via the first controller.
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公开(公告)号：US20240088690A1
公开(公告)日：2024-03-14
申请号：US18153417
申请日：2023-01-12
Applicant: Renesas Electronics America Inc.
Inventor： Sungkeun Lim , Chong Han , Yen-Mo Chen , HSIEN YI CHOU
IPC: H02J7/00
CPC classification number: H02J7/0068 , H02J7/0049 , H02J7/007182 , H02J2207/20
Abstract: Systems and methods for adaptive voltage regulation are described. According to an example, a method for operating a charger may include setting, by a charger controller of the charger, a maximum regulation voltage threshold and a minimum regulation voltage threshold, the minimum regulation voltage threshold being a predetermined percentage of the maximum regulation voltage threshold, the predetermined percentage ranging from between about 90% and about 98%; setting, by the charger controller, a charger regulation voltage to the maximum regulation voltage threshold; determining, by a battery monitor, a state of charge of a battery module; and operating the charger at the maximum regulation voltage threshold until the battery module is maximally charged.
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公开(公告)号：US12278508B2
公开(公告)日：2025-04-15
申请号：US16901673
申请日：2020-06-15
Applicant: Renesas Electronics America Inc.
Inventor： Yen-Mo Chen , Sungkeun Lim , Qian Sun
Abstract: A battery charger is described that can support multiple battery applications with a single USB type-C port. An architecture can include a single charger transferring power to multiple battery stacks. The architecture can include a plurality of battery stacks each respectively housed in a distinct electronic device. The architecture is expandable from one charger with one USB type-C port coupled to a plurality of battery stacks, to a plurality of chargers with respective USB type-C ports all coupled to a plurality of battery stacks respectively housed in distinct electronic devices.
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公开(公告)号：US10483837B1
公开(公告)日：2019-11-19
申请号：US15979359
申请日：2018-05-14
Applicant: Renesas Electronics America Inc.
Inventor： Yen-Mo Chen
Abstract: The present embodiments are directed to an improved switched capacitor (SC) converter topology that does not include an inductor. In particular, the topology includes a ladder SC circuit configured as a cap divider, with a gate driving signal being generated to initiate the charging and discharging of the capacitor. In this specific topology, an unregulated output voltage is produced that is a certain fraction of an input voltage of a power source such as a battery. The present embodiments further include a variable frequency modulation (VFM) scheme based on the current-sensing techniques for the gate driving signal generation of the switched capacitor converter.
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Patent Agency Ranking
公开(公告)号：US12149105B2
公开(公告)日：2024-11-19
申请号：US17502613
申请日：2021-10-15
Applicant: Renesas Electronics America Inc.
Inventor： Shahriar Jalal Nibir , Yen-Mo Chen , Sungkeun Lim
IPC: H02J7/00
Abstract: A method, apparatus and non-transitory computer-readable medium of regulating current within a battery charging circuit. The apparatus including a first current sense resistor configured to sense a first current value at a first port, a second current sensor resistor configured to sense a battery discharge current value output from a battery, and a processor configured to, in response to a short circuit or malfunction at the first current sense resistor, use the battery discharge current value to determine an output current limit and to limit the current at the first port according to the output current limit.
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7.发明公开公开(公告)号：US20240322590A1
公开(公告)日：2024-09-26
申请号：US18188672
申请日：2023-03-23
Applicant: Renesas Electronics America Inc.
Inventor： Shahriar Jalal NIBIR , Sungkeun LIM , Yen-Mo Chen , Chong HAN , Heonyoung KIM
IPC: H02J7/02
CPC classification number: H02J7/02 , H02J2207/20 , H02J2207/30 , H02M1/4225 , H02M1/4291
Abstract: A method may include receiving power from a power adapter having a power adapter current limit, providing power from the power adapter to a load having a load current at a first load current level that is less than or equal to the power adapter current limit; generating a first periodic current through an inductor in a forward direction; detecting the load having the load current at a second load current level that may be greater than the adapter power current limit; decreasing the forward current level of the first periodic current; and generating a second periodic current through the inductor in a reverse direction to provide power from the battery module to the load. The second periodic current may be initiated in the reverse direction when the first periodic current in the forward direction reaches the zero current level.
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公开(公告)号：US20240014680A1
公开(公告)日：2024-01-11
申请号：US18077039
申请日：2022-12-07
Applicant: Renesas Electronics America Inc.
Inventor： Sungkeun Lim , Yen-Mo Chen , Bin LI
IPC: H02J7/00
CPC classification number: H02J7/007182 , H02J7/0047 , H02J7/00711
Abstract: Systems and methods for using a battery voltage loop under high-current conditions are described. A method for operating a charger, the method includes setting, by a charger controller, a battery voltage threshold; setting, by the charger controller, an on-the-go (OTG) voltage threshold; computing, by a first comparator, a battery voltage error based on a difference between a battery voltage and the battery voltage threshold; computing, by a second comparator, an OTG voltage error based on a difference between an OTG voltage and the OTG voltage threshold; and selecting, by a loop selector, a battery voltage loop when the battery voltage error is smaller than the OTG voltage error.
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公开(公告)号：US11721985B2
公开(公告)日：2023-08-08
申请号：US17181850
申请日：2021-02-22
Applicant: RENESAS ELECTRONICS AMERICA INC.
Inventor： Yen-Mo Chen , Sungkeun Lim
IPC: H02J7/00
CPC classification number: H02J7/0013 , H02J7/00711 , H02J7/007182
Abstract: Example implementations include a charging device with a capacitor divider circuit including a plurality of battery state inputs operably coupleable to a plurality of battery devices, and a pulse width modulation (PWM) generator operable to selectively charge the battery devices, a plurality of switching transistors each operatively coupled at a gate terminal thereof to a respective PWM control output of a plurality of PWM control outputs, and a flying capacitor operatively coupled at a first terminal thereof to a first plurality of the switching transistors, operatively coupled at a second terminal thereof to a second plurality of the switching transistors. Example implementations further include a comparator operatively coupled to the capacitor divider circuit and operable to determine whether a difference between voltages associated with the battery devices satisfies a voltage threshold, where the capacitor divider circuit is further operable to, in response to a determination that the difference satisfies the voltage threshold, block charging of one or more of the battery devices.
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公开(公告)号：US20230098567A1
公开(公告)日：2023-03-30
申请号：US17479214
申请日：2021-09-20
Applicant: Renesas Electronics America Inc.
Inventor： Sungkeun Lim , Yen-Mo Chen , Keeho Shin
Abstract: Battery charger systems and apparatuses are described. In an example, an apparatus may include a first controller, a first port connected to the first controller, a first charger module connected to the first controller, a second controller, a second port connected to the second controller, and a second charger module connected to the second controller. The first controller may be configured to form a first connection path between the first charger module and the second port via the second controller. The first controller may be further configured to form a second connection path between the second charger module and the first port via the first controller.
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