Dynamic Current Allocation for Peripheral Interfaces
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Solution Overview
Problem
Existing power management systems for electronic devices struggle with overcurrent situations, leading to peripheral interfaces being shut down when total current demand exceeds the maximum allowed limit, limiting the number of connected devices and requiring disconnection of devices to prevent overload.
Innovation Solution
Implementing a system with current regulation and measurement circuits for each peripheral interface, managed by a controller that dynamically adjusts current supply to individual interfaces, allowing for flexible power distribution and limiting current to specific devices when the total limit is exceeded, while informing devices of the current limitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current limiting circuits are used to protect the host from overcurrent, then the host is protected from damage, but the peripheral interface is shut down and cannot be used until the device is unplugged
Solution Approach 1:
The patent implements dynamic current management by allowing the peripheral interface to remain connected and functional while the controller dynamically adjusts current allocation. When overcurrent is detected, the controller redistributes current from other active interfaces rather than shutting down the affected interface, making the current management dynamic and adaptive rather than static and punitive.
Solution Approach 2:
The system continuously monitors current consumption at each peripheral interface and provides feedback to the controller. When overcurrent conditions are detected, the controller receives this feedback and automatically reallocates current from other interfaces to the affected interface, creating a closed-loop feedback system that maintains interface availability while preventing host damage.
2Power
If devices connect to multiple ports to exceed single port current limits, then higher current demand devices can be powered, but the system complexity increases and user experience deteriorates
Solution Approach 1:
The controller provides universal current management across all peripheral interfaces, allowing any single interface to dynamically receive increased current allocation when needed. Instead of requiring devices to connect to multiple ports to achieve higher current, the system's multi-functional current allocation allows any interface to serve high-power devices by redistributing current from other interfaces as needed.
3Reliability
If ports are closed down using relays to enforce current limits, then total current limits are maintained, but users are confronted with unresponsive peripherals and must manually disconnect devices
Solution Approach 1:
The patent replaces the mechanical relay-based port shutdown mechanism with an electronic current reallocation system. Instead of physically opening circuits to enforce current limits, the controller electronically redistributes current through the existing interfaces, eliminating the need for mechanical interruption and maintaining continuous device operation and responsiveness.
Data Source
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AI summary
A device, arrangement and method comprises dynamically limiting current provided to multiple peripheral interfaces of an electronic device, comprising individual current limiting per peripheral interface and global current limiting over all peripheral interfaces, in way that is optimized to best suit power needs for the peripheral devices connected to the peripheral interfaces while respecting the power supplying capacity of the electronic device.