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公开(公告)号：US10404086B2
公开(公告)日：2019-09-03
申请号：US15642921
申请日：2017-07-06
Applicant: GOOGLE INC.
Inventor： Xuelin Wu , Christopher David Bernard
Abstract: An apparatus for charging a battery of a user device includes a charge pump that converts an input voltage, received from a power adapter, to a system voltage that is less than the input voltage based on a ratio of the charge pump, a regulator coupled between the system voltage output by the charge pump and a battery of the user device, the regulator configured to control a battery charging voltage applied to the battery of the user device and to provide isolation between the system voltage that is applied to one or more components of the user device and the battery charging voltage applied to charge the battery of the user device, and a controller configured to determine a difference between the system voltage applied to an input of the regulator and the charging voltage output by the regulator.
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公开(公告)号：US09917520B2
公开(公告)日：2018-03-13
申请号：US15178073
申请日：2016-06-09
Applicant: GOOGLE INC.
Inventor： Xuelin Wu
CPC classification number: H02M3/33523
Abstract: Power adapters generally include a few components that make up the majority of the volume. One component that can consume a relatively large volume is a bulk capacitor. In accordance with the implementations described herein, the size (which can include the capacitance value or volume) of the bulk capacitor within a power adapter can be reduced. Moreover, by introducing a new control scheme, the bulk capacitor can be eliminated from the power adapter. This size reduction or elimination of the bulk capacitor from a power adapter can result in not only a smaller power adapter, but can also result in a lower cost for production of the power adapter and/or an improvement in the power factor and/or power efficiency of the power adapter. This type of relatively small adapter can be beneficial from a user experience perspective.
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