Voltage Control Circuit for Adjustable Power Adapter
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Solution Overview
Problem
Traditional power supply systems for portable devices are inefficient due to constant high output voltage, which reduces efficiency and increases heat generation, especially since charging time is a fraction of the overall operation time.
Innovation Solution
An electric device comprising a charging circuit and a voltage control circuit that adjusts output voltage based on charging needs, using a control circuit to generate signals for the adapter to transform input voltage into optimal voltage levels, reducing inefficiency and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adapter always outputs higher and fixed voltage for charging, then the charging function is ensured, but the adapter efficiency decreases and energy loss increases
Solution Approach 1:
The adapter's output voltage is changed from fixed to dynamic adjustable. The voltage control circuit receives control signals from the charging circuit to dynamically adjust the output voltage between high voltage mode (for charging) and low voltage mode (for non-charging operation), optimizing efficiency based on real-time system needs
Solution Approach 2:
The output voltage parameter of the adapter is made variable rather than fixed. The voltage control circuit modifies the voltage parameter according to charging status, switching between high voltage when charging is needed and low voltage when it is not, thereby reducing energy loss during non-charging periods
2Reliability
If the adapter outputs higher fixed voltage continuously, then charging capability is maintained, but heat generation increases and efficiency decreases
Solution Approach 1:
The adapter transitions from continuous high voltage output to dynamic voltage adjustment. The voltage control circuit monitors charging status and adjusts output voltage accordingly, reducing heat generation during non-charging operation while maintaining charging capability when needed
Solution Approach 2:
The adapter operates in periodic high voltage mode only when charging is required, rather than continuously. The voltage control circuit enables high voltage output periodically during charging phases and switches to low voltage during non-charging phases, reducing overall heat generation
3Reliability
If the adapter outputs high voltage all the time, then charging function is ensured, but energy waste increases since charging time is only a fraction of operation time
Solution Approach 1:
The output voltage parameter is changed from constant high voltage to variable voltage based on operational mode. During charging (small fraction of time), high voltage is applied; during non-charging (majority of time), low voltage is applied, significantly improving overall energy efficiency
Solution Approach 2:
The adapter adopts dynamic voltage control that adapts to different operational states. The voltage control circuit switches between high and low voltage modes based on charging status, ensuring charging function when needed while minimizing energy consumption during the majority of non-charging operation time
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
Enhances system efficiency by dynamically adjusting voltage output, reducing energy loss and heat generation by switching between high and low voltage modes based on charging requirements.
Implementation Method 1
the voltage control circuit transforms the signal from the charging circuit for inducing the adapter to adjust the output voltage
Data Source
AI summary
An electrical device is provided. The electrical device of this invention includes a voltage control circuit that couples with an AC-DC adapter and a charger. The voltage control circuit uses the charger to determine the condition of the battery and controls the AC-DC adapter to generate different output voltages by the conditions of the system loading and the battery. The electrical device can be used for portable equipment.