Google Inc.

Li Wang

Srikanth Lakshmikanthan

Liang Jia

Stefano Saggini

Qi Tian

Veera Venkata Siva Nagesh Polu

Liyu Yang

Douglas Osterhout

YungChih Chen

Chao Fei

Mario Ursino

Ruben Specogna

In general, techniques are described that are directed to a device that includes a power storage device, an electrical load, and a first regulated power converter including components configured to generate, during a first time period and using electrical energy received from a power source external to the device, a first power signal to charge the power storage device. A second regulated power converter includes components configured to determine a charging current at which to charge the power storage device, determine a total amount of current flowing to the power storage device that includes current sourced by the second power converter less current sinked by the electrical load, and generate, during a second time period that is non-overlapping with the first time period, using electrical energy from the power source and based on determined the total amount of current, a second power signal to charge the power storage device.

Parallel charger circuit with battery feedback control

This document describes techniques and apparatuses directed at reducing inductive-charging power loss. In aspects, a mobile device includes a multi-layer flexible printed circuit board (FPCB) coil that forms a receiver coil having a Litz-wire structure. The FPCB coil includes a multi-trace bundle, having traces systematically routed throughout the different layers of the FPCB coil to reduce eddy current losses.

Techniques and apparatuses to reduce inductive charging power loss

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Mountain View, CA, United States of America

Li Wang