USB OTG Adapter Power Management via ID Pin Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing USB standard does not allow USB On-The-Go (OTG) devices with a hard-wired cable and Micro-A plug to be used with devices that have a Standard-A receptacle, as the USB standard-A always represents a host socket and supplies power, causing power violations when connected to devices that need to receive power.
Innovation Solution
A switching unit is used to connect or disconnect the power terminal of a first serial interface (such as a USB standard-A plug) to the power terminal of a second serial interface based on the voltage level at an identification terminal of the second serial interface, allowing for proper power management and preventing power violations by determining if the connected device needs to supply or receive power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If USB standard-A receptacle is used to connect devices, then universal compatibility is achieved, but power violations occur when connecting to devices that need to receive power
Solution Approach 1:
An adapter is introduced as an intermediary device between the USB standard-A receptacle and the Micro-A plug device. The adapter contains a switching unit that detects the device type through an identification terminal and selectively connects or disconnects the power terminal, thereby mediating the power flow to prevent violations while maintaining compatibility.
Solution Approach 2:
The adapter implements feedback by detecting the voltage level at the identification terminal (ID pin) to determine whether the connected device is a host or device type. Based on this feedback signal, the switching unit automatically adjusts the power terminal connection state, enabling dynamic power management that prevents power violations.
2Use of energy by moving object
If power terminal is always connected in USB standard-A interface, then power supply is ensured, but power conflicts arise with hosts or chargers
Solution Approach 1:
The power terminal connection is changed from a static always-connected state to a dynamic state that can be switched on or off. The switching unit dynamically adjusts the power terminal connection based on real-time detection of the connected device's power needs, ensuring power supply when needed while avoiding power conflicts when the device is a host or charger.
3Adaptability or versatility
If USB OTG device with Micro-A plug is connected to Standard-A receptacle, then connection versatility is improved, but power management conflicts occur
Solution Approach 1:
The adapter enables self-service power management by automatically detecting the connected device type through the identification terminal voltage level and autonomously controlling the power terminal connection. This eliminates the need for manual power management configuration and resolves power management conflicts automatically, maintaining connection versatility while simplifying power management.
Data Source
AI summary
This invention relates to a method, an apparatus, a computer program product and a system for a first serial and a second serial interface for connecting or disconnecting a power terminal of a first serial interface to a power terminal of a second serial interface based on a voltage level at an identification terminal of the second serial interface, wherein each interface comprising at least one data line and power supply line.