Power Management Module for Sequential Load Current Control
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Solution Overview
Problem
In electronic devices like POS systems, the simultaneous activation of high-power components such as printing and wireless communication modules can lead to an instantaneous surge in total load current, potentially damaging the device due to exceeding the maximum power supply capacity.
Innovation Solution
A power management method that monitors and sequentially stops the supply of electric power to loads with lower priority until the total load current is below a reference value, ensuring stable operation by managing the power distribution between multiple power modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple high-power components are activated simultaneously, then the device functionality is improved, but the total load current exceeds the maximum power supply capacity causing potential damage
Solution Approach 1:
The power management module performs preliminary detection to determine whether multiple power modules are activated simultaneously before power surge occurs. Based on this preliminary detection, the module proactively adjusts power distribution by sequentially stopping power supply to less critical loads, preventing the harmful effect of current surge before it can damage the power supply system.
2Power
If the power supply capacity is increased to meet peak demand, then the maximum power is improved, but the power-saving and safety requirements are compromised
Solution Approach 1:
The power management module dynamically adjusts the power supply capacity based on real-time detection of power module activation status. When multiple high-power components are detected to be activated simultaneously, the module dynamically reduces the effective power capacity by sequentially stopping power to less critical loads, thereby adapting the power supply to match actual demand without requiring excessive peak power capacity.
3Productivity
If all loads receive power simultaneously, then the operational efficiency is improved, but the inrush current exceeds the reference value causing device damage
Solution Approach 1:
The power management module performs preliminary detection to identify simultaneous activation of multiple power modules before inrush current occurs. It then proactively implements sequential power distribution, stopping power supply to less critical loads first, thereby preventing the harmful inrush current effect while still enabling critical operations to proceed.
Solution Approach 2:
The power management module implements periodic power supply adjustment by sequentially enabling or disabling power to different loads in a controlled sequence. This periodic control mechanism ensures that power is distributed in manageable increments rather than all at once, preventing current surge while maintaining overall system operation.
Data Source
AI summary
The present invention discloses an electronic device having a power management module and a power management method thereof. Within the power management method is used for an electronic device, which has a first power module, a second power module and the loads. The power management method comprises the following step: (1) monitoring the first power module and the second power module; (2) if the first power module and the second power module are activated at the same time, sequentially stopping a supply of electric power to at least one of the loads until the electronic device has total load current smaller than a reference value.