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USB charger recognition device and method

A technology for identifying devices and chargers, applied in the field of communication electronics, can solve the problem of not being able to distinguish between standard USB chargers and non-standard USB chargers, and achieve the effect of safe and reliable charging

Active Publication Date: 2014-07-30
HISILICON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is no identification scheme capable of distinguishing standard USB chargers from non-standard USB chargers in the prior art

Method used

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  • USB charger recognition device and method
  • USB charger recognition device and method
  • USB charger recognition device and method

Examples

Experimental program
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Embodiment Construction

[0049] In the embodiment of the present application, USB chargers are divided into two categories according to the charging current provided: standard USB chargers and non-standard USB chargers. Since there are differences in the internal structure of the same type of USB chargers, the Standard USB chargers are further divided into: the first type of standard USB chargers and the second type of standard USB chargers; non-standard USB chargers are further divided into: the first type of non-standard USB chargers, the second type of non-standard USB chargers Standard USB charger and Host USB interface, because the Host USB interface can charge the portable device while performing data interaction with the portable device, and the charging current is within the charging current range of the non-standard charger.

[0050] Wherein, the USB interface of the USB charger includes VBUS pin, D+ pin, D- pin and GND pin, Figure 1a It is a structural schematic diagram of the USB interface ...

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PUM

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Abstract

The invention discloses a USB charger recognition device and a method. The device comprises a USB interface module, a voltage signal obtaining module, a charging module and a processor. USB chargers with different types are different in structures, the USB chargers with different structures are different in electrical level states of voltage signals on a D+ pin and a D- pin, therefore, the electrical level states of the voltage signals on the D+ pin and the D- pin and a charging voltage on a VBUS pin can be obtained and judged through the voltage signal obtaining module, and types of the USB chargers can be distinguished. Thus, the connected USB chargers can be distinguished to judge whether standard USB chargers or not, the standard USB chargers are used for charging protable equipment provided with rechargeable batteries, and safe and stable charging can be ensured.

Description

technical field [0001] The invention relates to the technical field of communication electronics, in particular to a USB (Universal Serial BUS, Universal Serial Bus) charger identification device and method. Background technique [0002] With the widespread use of USB interfaces, many portable devices with rechargeable batteries can be charged by USB chargers through the USB interfaces. [0003] Since there are various types of USB chargers, the charging currents they provide are not all the same, so the USB chargers that can provide a charging current of at least 1A are collectively referred to as standard USB chargers. The USB chargers that cannot provide at least 1A charging current are collectively referred to as non-standard USB chargers. The charging current that the non-standard USB charger can provide is within the range of [0.5A, 0.9A]. Reliable charging of portable devices with rechargeable batteries requires a distinction between standard-class USB chargers and n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/10
Inventor 林贻山
Owner HISILICON TECH