Fast charging circuit and method capable of automatically adjusting power

Abstract

The invention discloses a fast charging circuit and method capable of automatically adjusting the power. The circuit includes a power input end, a charging control module, a first output interface anda second output interface, wherein the charging control module includes an input rectification filtering module, a main power switching module, an output rectification filtering module, a first fastcharging control module and a second fast charging control module, a high frequency transformer is connected between an output end of the main power switching module and an input end of the output rectification filtering module, a DC-DC module is connected between an output end of the input rectification filtering module and an input end of the second fast charging control module, and a feedback unit is connected between the first fast charging control module and the main power switching module. The method is applied to the fast charging circuit. The circuit is advantaged in that charging efficiency is optimized through intelligent distribution of the multi-port power, the charging speed of electrical appliances can be accelerated, and power distribution of two output ports can be simultaneously achieved.

Description

【Technical field】 [0001] The invention relates to the technical field of fast charging, in particular to a fast charging circuit capable of automatically adjusting power and a fast charging method applied to the circuit. 【Background technique】 [0002] At present, the commonly used multi-port adapters on the market mostly use the output power of fixed ports, especially on dual Type-c interface fast charging adapters, which cannot dynamically allocate the output power of the two Type-c interfaces reasonably. It not only causes a waste of charging power, but also increases the cost of the adapter. [0003] Such as figure 1 As shown, in an existing multi-port adapter, it is mainly composed of AC-DC power supply module 1, output A port 2, output C port 3 and PD fast charging protocol controller 4, output A port 1 and output C Port 2 fixes the output power respectively. In general, the fixed output power of output A port 1 is small, and the fixed output power of output C port ...

AI Technical Summary

Problems solved by technology

The disadvantage of this control strategy is that it lacks flexibility and cannot effectively distribute power. At the same time, the port detection circuit is added, which increases the cost of the adapter. It can only realize the power distribution of output C port 12, but cannot output A port 11 Simultaneously achieve optimal power distribution with output C port 12

[0005] Therefore, there are common shortcomings in the existing multi-port adapters: power distribution cannot be performed or the power distribution is not intelligent enough, and the optimal power distribution cannot be achieved at the same time for two output ports at the same time, and the power cannot be distributed reasonably and effectively, resulting in a decrease in charging efficiency. Greatly reduced

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