Voltage Control Logic for Auto Power-Off in Sub-Power Electronic Devices
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Solution Overview
Problem
Conventional electronic devices with sub power source type power sources face complexity when adding an auto power-off function, making it difficult to implement with a simple configuration.
Innovation Solution
The electronic device includes a first voltage output part, a second voltage output part, and controllers that manage voltage supply states to implement an auto power-off function by stopping the first voltage to the second controller after stopping the second voltage to the third controller, allowing for a simple configuration of the auto power-off functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an auto power-off function is added to a sub power source type electronic device, then power-saving capability is improved, but device complexity increases
Solution Approach 1:
The power supply system is segmented into two independent voltage output parts: a main voltage output part and a sub voltage output part. Each part has its own controller and operates independently. The main voltage output part supplies voltage during active operation, while the sub voltage output part supplies voltage during standby periods. This segmentation allows the auto power-off function to be implemented by simply controlling when each segment operates, without requiring complex integrated power management circuitry.
2Loss of energy
If multiple controllers manage voltage supply states, then power-saving control is improved, but control complexity increases
Solution Approach 1:
The control system is segmented into a first controller for the main voltage output part and a second controller for the sub voltage output part. Each controller independently manages its respective voltage output based on simple operational states (operation vs. standby). This segmentation avoids the need for a single complex controller to manage all power states, reducing overall control complexity while maintaining effective power-saving functionality.
Solution Approach 2:
Each voltage output part and its associated controller operate autonomously based on predefined conditions. The main voltage output part automatically stops when the sub voltage output part is active, and vice versa. This self-service mechanism eliminates the need for complex inter-controller communication and coordination, simplifying the overall control architecture while achieving effective power-saving control.
Data Source
AI summary
An electronic device includes a first voltage output part configured to output a first voltage, a second voltage output part configured to output a second voltage, a first controller configured to receive the first voltage supplied from the first voltage output part, a second controller configured to receive the first voltage supplied from the first voltage output part, and a third controller configured to receive the second voltage supplied from the second voltage output part. The first controller stops the supply of the first voltage to the second controller by the first voltage output part after the supply of the second voltage to the third controller by the second voltage output part has been stopped.