公开(公告)号：US20240077932A1

公开(公告)日：2024-03-07

申请号：US18122410

申请日：2023-03-16

Applicant: Apple Inc.

Inventor： Talbott M. Houk ,  Wenxun Huang ,  Nikola Jovanovic ,  Floyd L. Dankert ,  Sanjay Pant ,  Alessandro Molari ,  Siarhei Meliukh ,  Nicola Florio ,  Ludmil N. Nikolov ,  Nathan F. Hanagami ,  Hartmut Sturm ,  Di Zhao ,  Chad L. Olson ,  John J. Sullivan ,  Seyedeh Maryam Mortazavi Zanjani ,  Tristan R. Hudson ,  Jay B. Fletcher ,  Jonathan A. Dutra

IPC: G06F1/3296 ,  G06F1/3212 ,  G06F1/3234

CPC classification number: G06F1/3296 ,  G06F1/3212 ,  G06F1/3278

Abstract: The present disclosure describes a system with a power management device, a wakeup circuit, a battery management device, and a connector. During a powered down mode of operation, the battery management device can provide, via the connector, a bias voltage to the wakeup circuit. In response to a wakeup switch being activated, the battery management device can provide a power supply (e.g., from a battery) to the power management device. Benefits of the wakeup circuit include (1) a reduction of battery consumption—and thus improving battery lifetime—when the electronic system is in a powered down mode of operation because the wakeup circuit has lower number of active components compared to other designs and (2) a non-complex wakeup circuit design because one or more existing connector interconnects between the power management device and the battery management device can be re-used during electronic system's powered down mode of operation.