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Charging protection circuit and charger

A charging protection and charger technology, used in safety/protection circuits, battery circuit devices, current collectors, etc., can solve problems such as inaccurate ESD testing and protocol control circuit interference, improve accuracy and test efficiency, and avoid mistakes. output effect

Pending Publication Date: 2018-12-07
NUBIA TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a charging protection circuit and a charger, aiming to solve the technical problem that the protocol control circuit is often disturbed and the ESD test is inaccurate when the charger with the protocol control circuit is performing an ESD test

Method used

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  • Charging protection circuit and charger

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

[0026] In addition, if there are descriptions involving "first", ...

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Abstract

The invention discloses a charging protection circuit and a charger, wherein the charging protection circuit comprises a first voltage regulator tube and a second voltage regulator tube; one end of the first voltage regulator tube is electrically connected to a D+ output end of the charger while the other end is grounded; one end of the second voltage regulator tube is electrically connected to aD- output end of the charger while the other end is grounded. Via use of the charging protection circuit and the charger disclosed in the invention, a problem that a protocol control circuit of the charger suffers from interference and the D+ output end is affected can be prevented based on voltage stabilizing characteristics of a breakdown region of a PN junction of the first voltage regulator tube and the second voltage regulator tube, the charger is enabled to fulfill a charging function in a normal way, and the protocol control circuit can be prevented from false output or chip protection.When ESD tests are conducted on the charger, the ESD tests on the charger can be run normally, and ESD test accuracy and efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of chargers, in particular to a charging protection circuit and a charger. Background technique [0002] At present, many chargers have added digital circuit control, such as QC, PD and other protocol control circuits. Through various protocols, the charger can intelligently output current when charging, such as high-current charging, different currents in different time periods, charging heating protection, etc. . [0003] However, when a charger equipped with a protocol control circuit performs an ESD (Electro-Static discharge, electrostatic discharge) test, the protocol control circuit is often disturbed, which is likely to cause false output or chip protection, resulting in failure of the ESD test and failure of the ESD test. precise. [0004] The above content is only used to assist the understanding of the technical solutions of the present invention, and does not mean that the above content is the p...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0029
Inventor 李才杰
Owner NUBIA TECHNOLOGY CO LTD
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