Active Cable Power Management via Voltage Comparator
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Solution Overview
Problem
Active cables, which integrate electronic components to perform operations on data signals, face challenges in power distribution as existing standards such as USB do not allow power to be supplied to them, especially when connected to small devices with low battery levels, necessitating a mechanism to control current consumption.
Innovation Solution
A circuit mechanism within the active cable that includes a voltage comparator to control the current at two levels, enabling power management without additional wires or independent communication paths, utilizing the USB Type-C connector and its power sources to provide power to integrated electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power is supplied to active cables to enable integrated electronic components to function, then the cable can perform data signal operations, but small devices with low battery levels cannot provide sufficient power
Solution Approach 1:
The patent implements dynamic power management by monitoring voltage levels from the connected device and adjusting the active cable's operational state accordingly. When voltage exceeds a threshold (indicating sufficient power availability), the cable enables full functionality with integrated electronic components active. When voltage falls below the threshold (indicating low battery or insufficient power), the cable transitions to a low-power state, disabling non-essential functions to prevent device shutdown or damage.
2Adaptability or versatility
If USB standards are used for power distribution, then compatibility is maintained, but power cannot be allocated to active cables
Solution Approach 1:
The active cable performs self-diagnosis and self-regulation by monitoring the voltage provided by the connected USB device. The cable autonomously determines whether sufficient power is available and adjusts its operational mode without requiring complex negotiation protocols or additional communication wires. This self-service approach allows the cable to extract maximum available power within safety limits while maintaining USB standard compatibility.
3Power
If additional wires or independent communication paths are added to enable power control, then power management capability is improved, but device complexity increases
Solution Approach 1:
The patent leverages the existing USB Type-C connector's power pins to serve dual purposes: both data transmission and power delivery monitoring. The same physical interface used for data communication is also used to sense power availability and control cable operation. This multi-functional use of existing infrastructure eliminates the need for separate control wires or additional communication paths, maintaining cable simplicity while enabling intelligent power management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables controlled current consumption in active cables, ensuring full functionality at high current levels and minimal functionality at low current levels, allowing active cables to operate effectively even when connected to devices with low power sources, such as mobile phones and tablets.
Implementation Method 1
The circuit may include a voltage comparator that is to control logic to select a maximum power that the cable is to consume
Data Source
AI summary
The present disclosure provides a system and method for controlling power in an active cable via a circuit mechanism located internally within the cable assembly. The system may include a first device communicatively coupled to a second device via the cable assembly and a device power line. The circuit mechanism may control power to the cable assembly and a voltage comparator may be connected to the circuit mechanism to regulate the flow of power associated with the cable of the cable assembly.