USB Extension Device Dual Power Supply Management
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Solution Overview
Problem
Existing USB extension devices face power management challenges, particularly with the USB Type-C specification, as they often rely on a single power source, leading to insufficient power supply, system failures, and safety hazards due to high power consumption by external devices and hosts.
Innovation Solution
A USB extension device with dual power supply interfaces and a power management module that allows for simultaneous electrical coupling of two power sources, enabling efficient power distribution to the host and external devices via USB Type-C and power transmission specifications, ensuring safe and efficient power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single power source is used to supply power to USB external devices, then the device structure is simple, but the power supply is insufficient when total power consumption exceeds the supplied power capacity, leading to system failure, noise, insufficient voltage, detection failure, equipment damage, or electrical hazards
Solution Approach 1:
The power supply system is segmented into two independent power sources: a first power source (USB power supply) and a second power source (external DC power supply). Each power source independently supplies power to different parts of the system through separate power supply modules, avoiding the limitations of a single power source while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The USB extension device is designed to support multiple power supply modes: it can operate using only USB power, only external DC power, or both simultaneously. The power supply management module automatically detects and adapts to the available power sources, providing universal power supply capability that works across different usage scenarios and device configurations.
2Reliability
If a high-power external DC power supply is used to prevent power consumption exceeding supply capacity, then power supply reliability is improved, but unnecessary power is consumed and the power requirement of the USB host may not be satisfied in future high-demand scenarios
Solution Approach 1:
The power supply system dynamically adapts to power demands by allowing the USB host to negotiate power requirements with connected devices. The first power supply module can dynamically adjust power delivery based on actual device needs, and the system can switch between single and dual power source modes depending on the total power consumption requirements, avoiding the waste of always using a high-power supply.
Solution Approach 2:
The system changes power supply parameters dynamically: when USB power alone is sufficient, it operates in USB-only mode with lower power consumption; when additional power is needed, it transitions to dual power supply mode. The power supply management module monitors power consumption levels and adjusts the contribution from each power source accordingly, optimizing energy efficiency while meeting power demands.
3Device complexity
If the USB power supply is used as the sole power source, then the device structure is simple, but when total power consumption of external devices exceeds the USB power supply capacity, system failure, noise, insufficient voltage, detection failure, equipment damage, or electrical hazards occur
Solution Approach 1:
The system provides beforehand cushioning by incorporating a second power supply module as a backup and supplement to the first power supply module. Before power hazards can occur, the power supply management module detects when the first power source is approaching its capacity limit and automatically activates the second power source to share the power load, preventing voltage drops, overheating, and electrical hazards before they occur.
Solution Approach 2:
The power supply management module acts as an intermediary between the two power sources and the USB external devices. It monitors the power output of the first power supply module, detects when additional power is needed, and seamlessly introduces the second power supply module into the power delivery path. This intermediary control ensures smooth power transition and prevents the harmful effects of sudden power changes or insufficient power supply.
Data Source
AI summary
A USB extension device with dual power supply includes: a first power connection interface of USB Type-C and power transmission specification connected to a first power supply; a second power connection interface connected to a second power supply; a host connection interface of USB Type-C and power transmission specification connected to a host; an external interface connected to an external device; and a power supply management module connected to the first power connection interface, second power connection interface, host connection interface and external interface. When the first and second power connection interfaces are connected to the first and second power supplies respectively, the host supplies power through the host connection interface, and the power supply management module drives the first power supply to supply power to the host, while driving the second power supply to supply power to the power supply management module and to at least one external device.