Split Shell USB Receptacle Eliminates Standby Power Draw
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional USB charging receptacles draw power from the host even when not occupied by a plug, leading to wasteful energy consumption and battery drain in battery-powered hosts, as existing solutions like external switches and current-sensing circuits lack efficiency.
Innovation Solution
A USB receptacle design with a split shell that physically and electrically isolates its sides, using an on/off logic circuit to enable power delivery only when a plug is mated, thereby minimizing power consumption by disconnecting the charger circuit when the plug is removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional USB charging receptacles continuously draw power from the host, then the receptacle is always ready to charge devices, but electrical power is wasted when no device is connected
Solution Approach 1:
The receptacle performs preliminary detection of plug presence before enabling full power delivery. The split shell design detects plug insertion in advance, allowing the system to prepare for charging only when needed, avoiding continuous power draw.
Solution Approach 2:
The receptacle automatically detects plug presence and activates/deactivates power delivery without user intervention. The split shell design enables the receptacle to self-monitor its occupied state and self-regulate power consumption accordingly.
2Loss of energy
If external switches are used to control power to USB receptacles, then power consumption can be reduced, but the switch requires manual operation and user memory
Solution Approach 1:
The receptacle automatically detects plug presence and activates/deactivates power delivery without user intervention. The split shell design enables the receptacle to self-monitor its occupied state and self-regulate power consumption accordingly.
Solution Approach 2:
The on/off logic circuit receives feedback from the split shell about plug presence and automatically adjusts power delivery state. This closed-loop feedback system eliminates the need for manual switch operation while maintaining energy efficiency.
3Loss of energy
If the USB receptacle uses a split shell design with on/off logic circuit, then power consumption is minimized when unoccupied, but the device complexity increases
Solution Approach 1:
The split shell structure serves multiple functions simultaneously: it provides mechanical support, enables plug detection, and controls power delivery state. This multi-functionality reduces the need for separate components, offsetting the added structural complexity with functional consolidation.
Solution Approach 2:
The detection and power control functions are merged into the split shell structure itself. The shell halves and their connection state directly control the power delivery circuit, combining structural and control functions in a single integrated mechanism.
Data Source
AI summary
Provided herein is technology relating to providing power over a universal serial bus (USB) connection and particularly, but not exclusively, to devices, methods, and systems related to a (USB) technology for reducing energy consumption by a USB receptacle.