USB Docking Station Power Management with Dynamic Output Limits

The patent implements preliminary power allocation by pre-setting upper limit power values for each port based on the electronic device's total power supply capability. Before connecting multiple external devices, the docking station divides the available power into allocated portions for each port, ensuring that the sum of all allocated powers does not exceed the device's maximum output power. This preventive power distribution mechanism avoids overcurrent situations that could cause circuit board burnout or damage.

The patent implements a feedback mechanism where the docking station continuously monitors the actual power consumption of connected external devices and dynamically adjusts power allocation. When the total power consumption approaches the upper limit, the system provides feedback by disconnecting only the specific port exceeding its allocated power while maintaining connections at other ports. This selective feedback approach preserves circuit safety while minimizing disruption to user operations and preventing data loss.

The patent segments the power management system into independent output-monitoring circuits, with each circuit responsible for a specific port. Each monitoring circuit independently tracks the power consumption at its assigned port and enforces the pre-allocated power limit. This segmentation allows the docking station to support multiple external devices simultaneously while simplifying power management, as each segment operates autonomously within its allocated power budget, reducing the overall complexity of managing multiple devices.