Dynamic Power Supply Switching for Standby Mode Reliability
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Solution Overview
Problem
Computing devices inefficiently use power supplies when idle, leading to potential malfunctions or data loss due to insufficient power, especially when external devices are connected, as they rely solely on standby power supplies which can be overwhelmed.
Innovation Solution
Implementing a dynamic switching system that compares voltage outputs of standby and main power supplies using a detection circuit and switch to enable the main power supply when the external load exceeds a certain threshold, ensuring adequate power is provided to external devices during standby modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the standby power supply operates alone during idle mode, then power consumption is reduced, but the system reliability deteriorates when external devices are connected
Solution Approach 1:
The system dynamically switches between standby-only mode and dual power supply mode based on real-time detection of external device connections. The control circuit monitors the status of external devices and automatically adjusts the power configuration, transitioning from energy-saving standby operation to reliable dual-supply operation when devices are detected, thus resolving the contradiction between power consumption and system reliability.
Solution Approach 2:
The control circuit implements a feedback mechanism by continuously monitoring external device connection status and using this information to determine whether to activate the main power supply. This closed-loop control ensures that the system only consumes additional power when actually needed, maintaining reliability while minimizing unnecessary energy consumption.
2Reliability
If the main power supply is always on, then the system reliability is improved, but the power consumption increases during idle mode
Solution Approach 1:
Instead of keeping the main power supply continuously on, the system dynamically activates it only when external devices are detected during standby mode. This on-demand activation maintains system reliability when needed while avoiding unnecessary power consumption during idle periods, effectively resolving the contradiction between constant reliability and variable power consumption.
Solution Approach 2:
The control circuit performs preliminary detection of external device connections before activating the main power supply. This preliminary action allows the system to prepare for potential power demands by detecting device presence in advance, ensuring reliability is maintained only when actually required rather than continuously.
3Loss of energy
If the standby power supply operates alone during standby mode, then the power consumption is reduced, but the adaptability deteriorates when external devices require more power
Solution Approach 1:
The system dynamically adjusts its power delivery adaptability by switching from standby-only configuration to dual power supply configuration based on external device requirements. This dynamic adaptation allows the system to maintain low power consumption during idle mode while providing enhanced power delivery capability when external devices are connected, resolving the contradiction between energy efficiency and adaptability.
Solution Approach 2:
The system changes the power supply configuration parameter from single-standby mode to dual-supply mode based on detected external device power requirements. This parameter change enables the system to adapt its power delivery capability to match actual needs, maintaining energy efficiency when possible while providing necessary adaptability when external devices are connected.
Data Source
AI summary
The embodiments discussed herein relate to systems, methods, and apparatus for controlling power consumption of a computing device in a standby or sleep mode. During the standby or sleep mode an external device can be plugged into the computing device. The external device can be provided power from a standby power supply until a determination is made as to whether a main power supply is operating. The determination can be based on comparing the output of the main power supply to an output of the standby power supply. If the main power supply is operating, a switch in the computing device can close to allow the main power supply to provide power to the external device. Moreover, in some embodiments, the switch can close based exclusively on a current demand of the external device from the standby power supply.