A port management method for multi-port output DC power supply

Abstract

The invention provides a port management method for a multi-port output direct current power supply; the port management method comprises the steps of setting a priority and a limit current, collecting information of output ports, and adjusting the priority. The port management method disclosed by the invention can dynamically adjust the priority of each output port and the current limit value distributed to each output port according to the access situation of a load and the actual demand on power supply; and on the premise of ensuring that a main power source is not overloaded, the power supply capacity of the main power source is fully utilized.

Description

technical field [0001] The invention relates to the field of multi-port output power supplies, in particular to a port management method for multi-port output DC power supplies. Background technique [0002] With the wide application of various mobile communication terminals and electric tools, the demand for mobile electricity consumption is increasing. The common characteristics of these electrical appliances are: rechargeable battery power supply, charging voltage 5V, making it possible to share charging equipment, and the same It often happens that multiple batteries need to be charged in a time period. Using one main power supply to charge multiple small loads through multiple output ports is a compact, low-cost and high-efficiency solution. However, due to the different charging loads and charging curves , the load connected to each port is random, and the actual demand of the load decreases with the charging time. If it is not managed, the sum of the current of each o...

AI Technical Summary

Problems solved by technology

[0002] With the wide application of various mobile communication terminals and electric tools, the demand for mobile electricity consumption is increasing. The common characteristics of these electrical appliances are: rechargeable battery power supply, charging voltage 5V, making it possible to share charging equipment, and the same It often happens that multiple batteries need to be charged in a time period. Using one main power supply to charge multiple small loads through multiple output ports is a compact, low-cost and high-efficiency solution. However, due to the different charging loads and charging curves , the load connected to each port is random, and the actual demand of the load decreases with the charging time. If it is not managed, the sum of the current of each output port may exceed the power supply capacity, causing accidents or circuit protection. Common solutions The method is to set the limit for each output port separately, or use an independent winding, such as: CN102832829A, need to be seated according to the number when using; or all output ports are evenly distributed, which limits the use of high-power loads, and at the same time the actual demand of the load As the charging time decreases, the power supply capacity becomes idle, CN201210457211.9 "Multi-output switching power supply and multi-output power supply method"

By detecting the output voltage of the "power stage circuit" as the basis for adjustment, the utilization efficiency of the power supply is improved by dynamically adjusting the current of each output port. This technical solution is guaranteed by setting the "main output current" port, while other ports It will be reduced to "slave output current" disorderly competition for remaining resources, which may cause some ports connected to large loads to consume current due to insufficient power supply, and have no charging effect