Self-adaptive universal charger

Abstract

The invention provides a self-adaptive universal charger which aims to solve the problems that an existing charger has low efficiency and poor universality, and has great harm to a battery and low charging speed; a battery identification method is adopted, so that the type of the battery can be quickly and automatically identified; the optimal charging efficiency is realized through a charging method in which the charging current follow is self-adapted through a critical polarization method, so that the battery which is seriously polarized can be repaired; a two-stage charging termination detection method improves the charging accuracy and safety; a switch tube is adopted to integrate a charge pump power factor correction (CPPFC) circuit and a single-transistor forward circuit, so that not only the characteristic of wide work scope of the forward circuit is kept but also an input power factor is corrected through the CPPFC circuit, and the magnetic reset of the forward circuit is realized.

Description

technical field [0001] The invention is a universal charger device based on battery automatic identification, and relates to the fields of electronic technology, energy and automatic control. Background technique [0002] At present, the application of portable devices is becoming more and more extensive. Most household portable devices, such as notebook computers, digital cameras, mobile phones, PDAs, etc., use rechargeable batteries as the main power supply or backup power supply. However, most of the chargers for these devices are not universal, resulting in a large waste of energy and inconvenience in use. [0003] The Ministry of Information Industry promulgated and implemented the "Mobile Communication Handset Charger and Interface Technical Requirements and Test Methods" on December 14, 2006, aiming to solve the current problem that mobile phone chargers cannot be used universally. However, the implementation of this standard can only solve mobile phone chargers, and...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of low efficiency, poor versatility, great damage to the battery, and slow charging speed of the existing charger, and adopts a self-created battery identification method-a battery identification method based on a step response, which can quickly and automatically Identify the battery type; use the critical polarization method to adapt the charging current to follow the charging method to optimize the charging efficiency, and can repair the severely polarized battery; use two-stage charging termination detection to increase the accuracy of charging and safety; for the first time, a switch tube is used to combine the charge pump power factor correction circuit (CPPFC) and the single-transistor forward circuit, which not only retains the characteristics of the wide working range of the forward circuit, but also controls the input power factor through the CPPFC circuit. corrected and achieves a magnetic reset of the forward circuit

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