公开(公告)号：US10031189B1

公开(公告)日：2018-07-24

申请号：US15139985

申请日：2016-04-27

Applicant: Amazon Technologies, Inc.

Inventor： Thomas Gang Wang ,  Jesse Liang ,  Hanh Thuy Phan

IPC: G01R31/40 ,  G01R19/25 ,  G01R19/165

Abstract: This disclosure is directed to apparatuses, methods, and systems for detecting a capability of a power source connected to a device. For example, a device may include a standardized connector that may allow an unknown power source to provide power to the device. When a power source is connected with a device, a controller powers up and initiates power capability detection procedures. A ramping current sink begins drawing current from the power source at an initial value and increases that amount to a maximum current value. If a voltage on the device voltage bus falls below a voltage threshold during the ramping current sink operation, the current sink is disconnected and an indication is provided to the controller that the power source is underpowered. Further, a safety timer turns off the ramping current sink to prevent excessive heat generation.

公开(公告)号：US10203378B1

公开(公告)日：2019-02-12

申请号：US16008333

申请日：2018-06-14

Applicant: Amazon Technologies, Inc.

Inventor： Thomas Gang Wang ,  Jesse Liang ,  Hanh Thuy Phan

IPC: G01R31/40 ,  G01R19/165 ,  G01R19/25

Abstract: This disclosure is directed to apparatuses, methods, and systems for detecting a capability of a power source connected to a device. For example, a device may include a standardized connector that may allow an unknown power source to provide power to the device. When a power source is connected with a device, a controller powers up and initiates power capability detection procedures. A ramping current sink begins drawing current from the power source at an initial value and increases that amount to a maximum current value. If a voltage on the device voltage bus falls below a voltage threshold during the ramping current sink operation, the current sink is disconnected and an indication is provided to the controller that the power source is underpowered. Further, a safety timer turns off the ramping current sink to prevent excessive heat generation.