Host Detection Circuit for AC Adaptor Power State Monitoring
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Solution Overview
Problem
Existing information handling systems face inefficiencies in managing power delivery through alternating current (AC) adaptors, particularly in detecting changes in power state and optimizing energy usage when connected or disconnected from devices, leading to unnecessary power consumption.
Innovation Solution
The AC adaptor system incorporates a host detection circuit powered from the primary side, which monitors power state changes using a pulse width modulation (PWM) circuit and edge pulse generator to toggle the power delivery, enabling or disabling the PWM based on connection status, thereby isolating the secondary side and reducing energy wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the AC adaptor continues to convert AC to DC power when the device is fully charged or not in use, then the power delivery function is maintained, but energy is wasted
Solution Approach 1:
The host detection circuit performs preliminary detection to determine whether a device is connected and whether it requires power before the AC adaptor activates its power conversion function. This preliminary action prevents unnecessary energy conversion and wastage while ensuring power is ready when needed.
Solution Approach 2:
The system implements feedback through the host detection circuit that continuously monitors device connection status and power requirements, providing real-time information to the control circuit. This feedback mechanism enables the AC adaptor to dynamically adjust its operation, turning off power conversion when not needed and activating it when required, thus eliminating energy wastage without compromising reliability.
2Loss of energy
If a host detection circuit is added to monitor power state changes, then energy management is improved, but device complexity increases
Solution Approach 1:
The host detection circuit and control circuit are merged into a single integrated unit within the AC adaptor. This combination allows the detection and control functions to work together seamlessly, sharing common components and signal paths, thereby improving energy management efficiency while minimizing the increase in overall device complexity.
Solution Approach 2:
The host detection circuit is designed with multi-functionality, serving both to detect device connection status and to monitor power requirements. This universal approach allows a single circuit to perform multiple functions, improving energy management without proportionally increasing complexity.
3Power
If the PWM circuit is used to toggle voltage levels for power delivery control, then power regulation is achieved, but additional control circuitry is required
Solution Approach 1:
The PWM circuit is leveraged to perform dual functions: its primary power conversion function and its secondary function as a control element for toggling voltage levels. By making the PWM circuit self-sufficient in handling both power delivery and control tasks, the invention achieves effective power regulation without requiring separate dedicated control circuitry, thus minimizing additional complexity.
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
This solution effectively manages power delivery by ensuring power is only provided when needed, reducing energy loss and optimizing energy usage by detecting changes in the power state of the connected device, thus enhancing the efficiency of the AC adaptor system.
Implementation Method 1
A high impedance power delivery network is received at the primary side of the alternating current adaptor system
Implementation Method 2
a pulse coupling circuit to isolate and regulate voltage
Data Source
AI summary
A method for managing an alternating current adaptor system is disclosed. A direct current voltage is received at a high impedance power delivery network from a primary side of an alternating current adaptor system. An isolated voltage is output from the high impedance power delivery network to components of a secondary side of the alternating current adaptor system. A transition in a power state identification of an information handling system associated with the alternating current adaptor system is detected. An output voltage level of the alternating current adaptor system is alternated in response to the transition in the power state identification of the information handling system.