Renesas Electronics America Inc.

Qian Sun

Sungkeun Lim

Yen-Mo Chen

Zhigang Liang

Bin Li

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.

Single inductor multiple output charger for multiple battery applications

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.

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Milpitas, CA, United States of America

Qian Sun