公开(公告)号：US11243551B1

公开(公告)日：2022-02-08

申请号：US17031323

申请日：2020-09-24

Applicant: Renesas Electronics America Inc.

Inventor： Zhigang Liang ,  Qian Sun ,  Bin Li

IPC: G05F1/46

Abstract: Exemplary implementations include dynamically compensating a system voltage by determining an actual load current based on a sense voltage across a sense resistor and a resistance of the sense resistor, the sense resistor being operatively coupled to a system node, generating a gain current based on the actual load current and a predetermined load current, determining a gain voltage based on a system gain and the gain current, and generating a compensation voltage based on a predetermined system voltage at a system node, an actual system voltage at the system node, and the gain voltage. Exemplary implementations also include calibrating a dynamic voltage compensation device by applying a predetermined voltage to a system node operatively coupled to the system load, a sense resistor, and an internal system node, determining a test current based on a sense voltage across the sense resistor and a resistance of the sense resistor, determining a system resistance based on the predetermined voltage, the test current, and an internal system voltage at the internal system node, and setting a system gain based on the system resistance at a gain block device.

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

IPC: H02J7/00 ,  H02J3/38

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.