Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for reducing pulse interference voltage at output end of power adapter

A technology of power adapter and pulse interference, which is applied in current collectors, battery circuit devices, electric vehicles, etc., and can solve problems such as the influence of mobile phone input interface devices, high input voltage of mobile phones, and affecting the charging function of mobile phones.

Inactive Publication Date: 2014-12-10
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the normal charging current is directly reduced to zero ampere, it will cause a large current change in a short period of time, and because there is an inductor in the power adapter circuit and the charging circuit link of the built-in battery of the mobile phone, it will cause the output of the power adapter circuit A pulse interference voltage, the pulse interference voltage is superimposed on the normal output voltage of the power adapter output, causing the input voltage of the mobile phone to be too high, which may affect the charging function of the mobile phone and affect the input interface device of the mobile phone

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments.

[0015] A method for reducing the pulse interference voltage at the output end of a power adapter, the output end of the power adapter outputs a converted voltage to a small electronic device, and charges the built-in lithium battery of the small electronic device, the electronic device has a built-in charging circuit, the The method steps are as follows:

[0016] Step 1. Set the current gear control command of the charging circuit and write it into the register of the control chip;

[0017] Step 2. During the charging process, the control chip of the charging circuit controls the charging current to drop step by step with a fixed step size S within a fixed time interval T1 to zero amps;

[0018] Step 3. When the charging current drops to zero ampere, start the charging circuit or the voltage detection elemen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for reducing the pulse interference voltage at the output end of a power adapter. The output end of the power adapter outputs converted voltage to small-size electronic equipment to charge an internal lithium battery of the small-size electronic equipment; and the electronic equipment is internally provided with a charging circuit, a control chip of the charging circuit controls the charging current to drop to zero ampere by levels within fixed time duration T1 in a step length S according to a preset current level control instruction at every fixed time interval T so that the voltage of the internal battery is measured. According to the method disclosed by the invention, the current change rate (Delta I / Delta t) is reduced by the current adjusting method, therefore the pulse interference voltage rebounded by circuit output voltage of the power adapter is reduced and the compatibility between the electronic equipment and the power adapter is promoted.

Description

technical field [0001] The invention relates to the technical field of power supply voltage pulse interference, in particular to a method for reducing the pulse interference voltage at the output end of a power adapter. Background technique [0002] At present, mobile phones with lithium batteries generally have a built-in lithium battery charging circuit, and an external power adapter (including power supplies with similar functions, such as charging treasures, car power supplies, etc.) circuits output DC voltage to the mobile phone charging circuit for charging. The existing mobile phone charging circuit generally includes the following charging modes: 1. Low-voltage pre-charging mode - an active charging for the battery voltage is too low. In order to prevent excessive charging current from causing damage to the battery performance, the charging circuit at this time A gradual charging method will be adopted; 2. Full-speed charging mode - or constant current charging mode,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 曾元清
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com