CN106329618B - Charger end USB charging control circuit and terminal USB charging control circuit - Google Patents

Abstract

Translated fromChinese

本发明提供一种充电器端USB充电控制电路和充电器，包括USB母座、第一控制芯片、第一开关器件、第一防反模块和第二防反模块；USB母座包括电源线P+、接地线P‑、数据线正极D+和数据线负极D‑；第一控制芯片包括电源引脚、电压输出引脚、信号输出引脚、信号控制引脚和信号接收引脚；P+连接电源引脚，P‑接地；D+通过第一防反模块连接电压输出引脚；D+还依次通过第一防反模块、第一开关器件连接信号输出引脚，第一开关器件的控制端连接信号控制引脚；D‑连接信号接收引脚，D‑还通过第二防反模块接地。上述控制电路能够有效提高充电效率，另外还提供了一种终端USB充电控制电路和便携式多功能设备。

The present invention provides a charger end USB charging control circuit and a charger, including a USB socket, a first control chip, a first switching device, a first anti-reverse module and a second anti-reverse module; the USB socket includes a power cord P+ , ground wire P-, data line positive D+ and data line negative D-; the first control chip includes power supply pins, voltage output pins, signal output pins, signal control pins and signal receiving pins; P+ is connected to the power supply pins D+ is connected to the voltage output pin through the first anti-reverse module; D+ is also connected to the signal output pin through the first anti-reverse module and the first switch device in turn, and the control terminal of the first switch device is connected to the signal control lead pin; D‑connects to the signal receiving pin, and D‑ is also grounded through the second anti-reverse module. The above control circuit can effectively improve charging efficiency, and also provides a terminal USB charging control circuit and a portable multifunctional device.

Description

Translated fromChinese

充电器端USB充电控制电路和终端USB充电控制电路Charger end USB charging control circuit and terminal USB charging control circuit

技术领域technical field

本发明涉及USB充电技术领域，具体而言，本发明涉及一种充电器端USB充电控制电路和一种终端USB充电控制电路，还涉及一种充电器和一种便携式多功能设备。The present invention relates to the technical field of USB charging. Specifically, the present invention relates to a charger-end USB charging control circuit and a terminal USB charging control circuit, and also relates to a charger and a portable multifunctional device.

背景技术Background technique

USB是Universal Serial Bus(通用串行总线)的缩写，是一个外部总线标准，用于规范计算机与外部设备的连接和通讯。USB接口支持设备的即插即用和热插拔功能，通过USB接口能够进行充电和数据的传输。近年来，USB接口已经成为各种便携式智能终端的标准数据接口和充电接口。然而，智能终端通过USB充电器进行充电时，充电电流偏低，导致充电效率较差。USB is the abbreviation of Universal Serial Bus (Universal Serial Bus), which is an external bus standard used to regulate the connection and communication between computers and external devices. The USB interface supports the plug-and-play and hot-swap functions of the device, and the charging and data transmission can be performed through the USB interface. In recent years, the USB interface has become a standard data interface and charging interface for various portable smart terminals. However, when the smart terminal is charged by the USB charger, the charging current is relatively low, resulting in poor charging efficiency.

发明内容Contents of the invention

本发明的目的旨在至少能解决上述的技术缺陷之一，特别是安全性不高的技术缺陷。The purpose of the present invention is to at least solve one of the above-mentioned technical defects, especially the technical defect of low security.

本发明提供一种充电器端USB充电控制电路，包括：USB母座、第一控制芯片、第一开关器件、第一防反模块和第二防反模块；The present invention provides a USB charging control circuit at a charger end, comprising: a USB socket, a first control chip, a first switching device, a first anti-reverse module and a second anti-reverse module;

所述USB母座包括电源线P+、接地线P-、数据线正极D+和数据线负极D-；所述第一控制芯片包括电源引脚、电压输出引脚、信号输出引脚、信号控制引脚和信号接收引脚；The USB socket includes a power line P+, a ground line P-, a positive data line D+ and a negative data line D-; the first control chip includes a power supply pin, a voltage output pin, a signal output pin, and a signal control pin Pin and signal receiving pin;

所述电源线P+连接所述电源引脚，所述接地线P-接地；The power line P+ is connected to the power pin, and the ground line P- is grounded;

所述数据线正极D+通过第一防反模块连接所述电压输出引脚；所述数据线正极D+还依次通过第一防反模块、所述第一开关器件连接所述信号输出引脚，所述第一开关器件的控制端连接所述信号控制引脚；The positive pole D+ of the data line is connected to the voltage output pin through the first anti-reverse module; the positive pole D+ of the data line is also connected to the signal output pin through the first anti-reverse module and the first switching device in turn, so The control end of the first switching device is connected to the signal control pin;

所述数据线负极D-连接所述信号接收引脚，所述数据线负极D-还通过第二防反模块接地。The negative electrode D- of the data line is connected to the signal receiving pin, and the negative electrode D- of the data line is also grounded through the second anti-reverse module.

在其中一个实施例中，所述第一控制芯片为单片机。In one of the embodiments, the first control chip is a single-chip microcomputer.

在其中一个实施例中，所述第一开关器件为场效应晶体管。In one of the embodiments, the first switching device is a field effect transistor.

在其中一个实施例中，还包括第一电阻器；所述第一开关器件为P型MOS管，所述P型MOS管的S极连接第一防反模块、D极连接所述信号输出引脚、G极连接所述信号控制引脚，所述D极和G极之间还连接有第一电阻器。In one of the embodiments, it also includes a first resistor; the first switching device is a P-type MOS transistor, the S pole of the P-type MOS transistor is connected to the first anti-reverse module, and the D pole is connected to the signal output lead The pin and the G pole are connected to the signal control pin, and a first resistor is also connected between the D pole and the G pole.

在其中一个实施例中，还包括第一电容器，所述G极还通过第一电容器接地。In one of the embodiments, a first capacitor is further included, and the G pole is grounded through the first capacitor.

在其中一个实施例中，第一防反模块和/或第二防反模块为二极管，第一防反模块的负极连接所述数据线正极D+，第二防反模块的负极接地。In one embodiment, the first anti-reverse module and/or the second anti-reverse module are diodes, the negative pole of the first anti-reverse module is connected to the positive pole D+ of the data line, and the negative pole of the second anti-reverse module is grounded.

在其中一个实施例中，所述二极管为肖特基二极管。In one of the embodiments, the diode is a Schottky diode.

在其中一个实施例中，所述第一控制芯片用于：In one of the embodiments, the first control chip is used for:

当所述电源线P+和接地线P-接入供电环路时，通过所述信号控制引脚控制第一开关器件导通，通过所述信号输出引脚发出预设的检测信号。When the power line P+ and the ground line P- are connected to the power supply loop, the first switching device is controlled to be turned on through the signal control pin, and a preset detection signal is sent out through the signal output pin.

在其中一个实施例中，所述第一控制芯片用于：In one of the embodiments, the first control chip is used for:

在发出预设的检测信号之后，当所述信号接收引脚接收到预设的反馈信号时，通过所述信号控制引脚控制第一开关器件断开，通过所述电压输出引脚输出供电电流。After the preset detection signal is sent out, when the signal receiving pin receives the preset feedback signal, the first switching device is controlled to be turned off through the signal control pin, and the supply current is output through the voltage output pin .

在其中一个实施例中，所述第一控制芯片用于：In one of the embodiments, the first control chip is used for:

当所述信号接收引脚接收到预设的反馈信号时，经过预设的缓冲时间，通过所述信号控制引脚控制第一开关器件断开，通过所述电压输出引脚输出供电电流。When the signal receiving pin receives a preset feedback signal, after a preset buffer time, the first switching device is controlled to be turned off through the signal control pin, and the supply current is output through the voltage output pin.

本发明还提供一种充电器，其包括上述任一实施例的充电器端USB充电控制电路。The present invention also provides a charger, which includes the USB charging control circuit at the charger end of any one of the above embodiments.

本发明还提供一种终端USB充电控制电路，包括：USB公座，第二控制芯片、第二开关器件、第三开关器件、第三防反模块和第四防反模块；The present invention also provides a terminal USB charging control circuit, including: a USB male socket, a second control chip, a second switching device, a third switching device, a third anti-reverse module, and a fourth anti-reverse module;

所述USB公座包括电源线p+、接地线p-、数据线正极d+和数据线负极d-；所述第二控制芯片包括电源引脚、信号输出引脚、信号控制引脚和信号接收引脚；The USB public seat includes a power line p+, a ground line p-, a positive data line d+ and a negative data line d-; the second control chip includes a power supply pin, a signal output pin, a signal control pin and a signal receiving pin foot;

所述电源线p+连接所述电源引脚，所述接地线p-接地；The power line p+ is connected to the power pin, and the ground line p- is grounded;

所述数据线正极d+通过第三防反模块连接所述电压输出引脚；所述数据线正极d+还通过所述第二开关器件连接所述信号接收引脚，所述第二开关器件的控制端连接所述信号控制引脚；The positive pole d+ of the data line is connected to the voltage output pin through the third anti-reverse module; the positive pole d+ of the data line is also connected to the signal receiving pin through the second switching device, and the control of the second switching device The terminal is connected to the signal control pin;

所述数据线负极d-依次通过第四防反模块、第三开关器件接地，所述第三开关器件的控制端连接所述信号输出引脚。The negative electrode d- of the data line is grounded sequentially through the fourth anti-reverse module and the third switching device, and the control terminal of the third switching device is connected to the signal output pin.

在其中一个实施例中，所述第二控制芯片为单片机。In one of the embodiments, the second control chip is a single-chip microcomputer.

在其中一个实施例中，所述第二开关器件和/或第三开关器件为场效应晶体管。In one of the embodiments, the second switching device and/or the third switching device are field effect transistors.

在其中一个实施例中，还包括第二电阻器；所述第二开关器件为P型MOS管，所述P型MOS管的S极连接所述信号接收引脚、D极连接所述数据线正极d+、G极连接所述信号控制引脚，所述D极和G极之间还连接有第二电阻器。In one of the embodiments, it also includes a second resistor; the second switching device is a P-type MOS transistor, the S pole of the P-type MOS transistor is connected to the signal receiving pin, and the D pole is connected to the data line The positive pole d+ and the G pole are connected to the signal control pin, and a second resistor is also connected between the D pole and the G pole.

在其中一个实施例中，还包括第二电容器；所述G极还通过第二电容器接地。In one of the embodiments, a second capacitor is further included; the G pole is also grounded through the second capacitor.

在其中一个实施例中，所述第三开关器件为P型MOS管，所述P型MOS管的S极连接所述第三防反模块、D极接地、G极连接所述信号输出引脚。In one of the embodiments, the third switching device is a P-type MOS transistor, the S pole of the P-type MOS transistor is connected to the third anti-reverse module, the D pole is grounded, and the G pole is connected to the signal output pin .

在其中一个实施例中，第三防反模块和/或第四防反模块为二极管，第三防反模块的负极连接所述电源引脚，第四防反模块的负极连接所述数据线负极d-。In one of the embodiments, the third anti-reverse module and/or the fourth anti-reverse module are diodes, the negative pole of the third anti-reverse module is connected to the power supply pin, and the negative pole of the fourth anti-reverse module is connected to the negative pole of the data line d-.

在其中一个实施例中，所述二极管为肖特基二极管。In one of the embodiments, the diode is a Schottky diode.

在其中一个实施例中，所述第二控制芯片用于：In one of the embodiments, the second control chip is used for:

当所述电源线p+和接地线p-接入供电环路时，通过所述信号控制引脚控制第二开关器件导通，通过所述信号接收引脚接收预设的检测信号。When the power line p+ and the ground line p- are connected to the power supply loop, the second switching device is controlled to be turned on through the signal control pin, and a preset detection signal is received through the signal receiving pin.

在其中一个实施例中，所述第二控制芯片用于：In one of the embodiments, the second control chip is used for:

接收到预设的检测信号之后，通过所述信号输出引脚输出预设的反馈信号。After receiving the preset detection signal, output the preset feedback signal through the signal output pin.

在其中一个实施例中，所述第二控制芯片用于：In one of the embodiments, the second control chip is used for:

输出所述反馈信号后，通过所述信号控制引脚控制所述第二开关器件断开，通过所述信号输出引脚控制所述第三开关器件导通。After the feedback signal is output, the second switching device is controlled to be turned off through the signal control pin, and the third switching device is controlled to be turned on through the signal output pin.

在其中一个实施例中，所述第二控制芯片用于：In one of the embodiments, the second control chip is used for:

输出所述反馈信号后，经过预设的缓冲时间，通过所述信号控制引脚控制所述第二开关器件断开，通过所述信号输出引脚控制所述第三开关器件导通。After the feedback signal is output, after a preset buffer time, the second switching device is controlled to be turned off through the signal control pin, and the third switching device is controlled to be turned on through the signal output pin.

本发明还提供一种便携式多功能设备，其包括上述任一实施例的终端USB充电控制电路。The present invention also provides a portable multifunctional device, which includes the terminal USB charging control circuit of any one of the above embodiments.

上述的充电器端USB充电控制电路和充电器，包括USB母座、第一控制芯片、第一开关器件、第一防反模块和第二防反模块。USB母座包括电源线P+、接地线P-、数据线正极D+和数据线负极D-。在连接普通的终端进行充电时，只有电源线P+在充电，接地线P-保证接地，形成充电回路。在连接具有上述终端USB充电控制电路的终端进行充电时，第一控制芯片可以通过电压输出引脚向数据线正极D+输出充电电流，从而使得USB母座的电源线P+和数据线正极D+都输出充电电流，提高了充电效率。The above-mentioned USB charging control circuit at the charger end and the charger include a USB socket, a first control chip, a first switching device, a first anti-reverse module and a second anti-reverse module. The USB socket includes a power line P+, a ground line P-, a positive data line D+ and a negative data line D-. When connecting to an ordinary terminal for charging, only the power line P+ is charging, and the ground line P- is guaranteed to be grounded to form a charging circuit. When connecting a terminal with the above-mentioned terminal USB charging control circuit for charging, the first control chip can output charging current to the positive pole D+ of the data line through the voltage output pin, so that the power line P+ of the USB socket and the positive pole D+ of the data line both output The charging current improves the charging efficiency.

上述的终端USB充电控制电路和便携式多功能设备，包括：USB公座，第二控制芯片、第二开关器件、第三开关器件、第三防反模块和第四防反模块。在连接普通的充电器时，只有电源线p+在充电，接地线p-保证接地，形成充电回路。在连接具有上述充电器端USB充电控制电路的充电器进行充电时，第二控制芯片可以通过电源引脚从数据线正极d+获取充电电流，从而使得USB公座的电源线p+和数据线正极d+都能获取充电电流，提高了充电效率。The above-mentioned terminal USB charging control circuit and portable multifunctional device include: a USB socket, a second control chip, a second switching device, a third switching device, a third anti-reverse module and a fourth anti-reverse module. When connecting to an ordinary charger, only the power line p+ is charging, and the ground line p- is guaranteed to be grounded to form a charging loop. When connecting the charger with the above-mentioned USB charging control circuit on the charger side for charging, the second control chip can obtain the charging current from the positive pole d+ of the data line through the power pin, so that the power line p+ of the USB male seat and the positive pole d+ of the data line The charging current can be obtained, and the charging efficiency is improved.

本发明附加的方面和优点将在下面的描述中部分给出，这些将从下面的描述中变得明显，或通过本发明的实践了解到。Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

附图说明Description of drawings

本发明上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解，其中：The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

图1为一个实施例的充电器端USB充电控制电路图；Fig. 1 is a charger end USB charging control circuit diagram of an embodiment;

图2为一个实施例的终端USB充电控制电路图；Fig. 2 is a terminal USB charging control circuit diagram of an embodiment;

图3为一个实施例的充电系统电路图。Fig. 3 is a circuit diagram of a charging system of an embodiment.

具体实施方式Detailed ways

下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能解释为对本发明的限制。Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

本技术领域技术人员可以理解，除非特意声明，这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是，本发明的说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件，但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和/或它们的组。应该理解，当我们称元件被“连接”或“耦接”到另一元件时，它可以直接连接或耦接到其他元件，或者也可以存在中间元件。此外，这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Additionally, "connected" or "coupled" as used herein may include wireless connection or wireless coupling. The expression "and/or" used herein includes all or any elements and all combinations of one or more associated listed items.

本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)，具有与本发明所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语，应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非像这里一样被特定定义，否则不会用理想化或过于正式的含义来解释。Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have meanings consistent with their meaning in the context of the prior art, and unless specifically defined as herein, are not intended to be idealized or overly Formal meaning to explain.

本技术领域技术人员可以理解，这里所使用的“终端”、“终端设备”既包括无线信号接收器的设备，其仅具备无发射能力的无线信号接收器的设备，又包括接收和发射硬件的设备，其具有能够在双向通信链路上，执行双向通信的接收和发射硬件的设备。这种设备可以包括：蜂窝或其他通信设备，其具有单线路显示器或多线路显示器或没有多线路显示器的蜂窝或其他通信设备；PCS(Personal Communications Service，个人通信系统)，其可以组合语音、数据处理、传真和/或数据通信能力；PDA(Personal Digital Assistant，个人数字助理)，其可以包括射频接收器、寻呼机、互联网/内联网访问、网络浏览器、记事本、日历和/或GPS(Global Positioning System，全球定位系统)接收器；常规膝上型和/或掌上型计算机或其他设备，其具有和/或包括射频接收器的常规膝上型和/或掌上型计算机或其他设备。这里所使用的“终端”、“终端设备”可以是便携式、可运输、安装在交通工具(航空、海运和/或陆地)中的，或者适合于和/或配置为在本地运行，和/或以分布形式，运行在地球和/或空间的任何其他位置运行。这里所使用的“终端”、“终端设备”还可以是通信终端、上网终端、音乐/视频播放终端，例如可以是PDA、MID(Mobile Internet Device，移动互联网设备)和/或具有音乐/视频播放功能的移动电话，也可以是智能电视、机顶盒等设备。Those skilled in the art can understand that the "terminal" and "terminal equipment" used here not only include wireless signal receiver equipment, which only has wireless signal receiver equipment without transmission capabilities, but also include receiving and transmitting hardware. A device having receiving and transmitting hardware capable of performing bi-directional communication over a bi-directional communication link. Such equipment may include: cellular or other communication equipment, which has a single-line display or a multi-line display or a cellular or other communication equipment without a multi-line display; PCS (Personal Communications Service, personal communication system), which can combine voice, data Processing, facsimile and/or data communication capabilities; PDA (Personal Digital Assistant, Personal Digital Assistant), which may include radio frequency receiver, pager, Internet/Intranet access, web browser, notepad, calendar and/or GPS (Global Positioning System (Global Positioning System) receiver; a conventional laptop and/or palmtop computer or other device having and/or including a radio frequency receiver. As used herein, a "terminal", "terminal device" may be portable, transportable, installed in a vehicle (air, sea, and/or land), or adapted and/or configured to operate locally, and/or In distributed form, the operation operates at any other location on Earth and/or in space. The "terminal" and "terminal equipment" used here can also be communication terminals, Internet terminals, music/video playback terminals, such as PDAs, MIDs (Mobile Internet Devices, mobile Internet devices) and/or with music/video playback terminals. Functional mobile phones, smart TVs, set-top boxes and other devices.

图1为一个实施例的充电器端USB充电控制电路图。FIG. 1 is a circuit diagram of a USB charging control circuit at a charger end of an embodiment.

本发明提供一种充电器端USB充电控制电路，其包括：USB母座110、第一控制芯片U1、第一开关器件120、第一防反模块130和第二防反模块140。The present invention provides a USB charging control circuit at the charger end, which includes: a USB socket 110 , a first control chip U1 , a first switching device 120 , a first anti-reverse module 130 and a second anti-reverse module 140 .

USB母座110包括电源线P+、接地线P-、数据线正极D+和数据线负极D-。现有技术中，电源线P+和接地线P-主要用于充电，数据线正极D+和数据线负极D-主要用于数据传输。在本发明中，电源线P+和接地线P-主要用于充电，数据线正极D+和数据线负极D-既可以在传输数据时用于数据传输，又可以在充电时用于充电。The USB socket 110 includes a power line P+, a ground line P−, a positive data line D+ and a negative data line D−. In the prior art, the power line P+ and the ground line P- are mainly used for charging, and the positive pole D+ of the data line and the negative pole D- of the data line are mainly used for data transmission. In the present invention, the power line P+ and the ground line P- are mainly used for charging, and the positive pole D+ of the data line and the negative pole D- of the data line can be used for data transmission during data transmission, and can also be used for charging during charging.

第一控制芯片U1可以是单片机，单片机(Micro controllers)是一种集成电路芯片，是采用超大规模集成电路技术把具有数据处理能力的中央处理器CPU、随机存储器RAM、只读存储器ROM、多种I/O口和中断系统、定时器/计数器等功能(可能还包括显示驱动电路、脉宽调制电路、模拟多路转换器、A/D转换器等电路)集成到一块硅片上构成的一个小而完善的微型计算机系统，在工业控制领域广泛应用。在本实施例中，第一控制芯片U1采用应广公司的PMC150系列单片机，具体规格参数请浏览网址http://www.docin.com/p-1421710000.html。The first control chip U1 can be a single-chip microcomputer, and the single-chip microcomputer (Micro controllers) is a kind of integrated circuit chip. I/O port and interrupt system, timer/counter and other functions (may also include display drive circuit, pulse width modulation circuit, analog multiplexer, A/D converter and other circuits) integrated on a silicon chip to form a Small but complete microcomputer system, widely used in the field of industrial control. In this embodiment, the first control chip U1 adopts the PMC150 series single-chip microcomputer of Yingguang Company. For specific specifications and parameters, please visit the website http://www.docin.com/p-1421710000.html.

第一控制芯片U1包括电源引脚DVCC、电压输出引脚PA5、信号输出引脚PA0、信号控制引脚PA6和信号接收引脚PA3。电源引脚DVCC连接由市电转换成直流的供电电压，对于手机之类的智能终端而言，该供电电压通常为5V。The first control chip U1 includes a power supply pin DVCC, a voltage output pin PA5 , a signal output pin PA0 , a signal control pin PA6 and a signal receiving pin PA3 . The power supply pin DVCC is connected to the power supply voltage converted from mains power to DC. For smart terminals such as mobile phones, the power supply voltage is usually 5V.

USB母座110的电源线P+连接第一控制芯片U1的电源引脚DVCC，接地线P-接地，从而供电电压可以通过电源线P+对外实现供电。The power line P+ of the USB socket 110 is connected to the power pin DVCC of the first control chip U1, and the ground line P− is grounded, so that the power supply voltage can be supplied externally through the power line P+.

USB母座110的数据线正极D+通过第一防反模块130连接第一控制芯片U1的电压输出引脚PA5。第一防反模块130是用于防反接的，可以为二极管D1，该二极管D1的负极连接数据线正极D+，该二极管D1的正极连接电压输出引脚PA5。该二极管D1可以为肖特基二极管。在本实施例中，该二极管D1采用IN5819肖特基二极管。The positive pole D+ of the data line of the USB socket 110 is connected to the voltage output pin PA5 of the first control chip U1 through the first anti-reverse module 130 . The first anti-reverse module 130 is used for anti-reverse connection, which may be a diode D1, the cathode of the diode D1 is connected to the positive electrode D+ of the data line, and the anode of the diode D1 is connected to the voltage output pin PA5. The diode D1 may be a Schottky diode. In this embodiment, the diode D1 is an IN5819 Schottky diode.

USB母座110的数据线正极D+还依次通过第一防反模块130、第一开关器件120连接第一控制芯片U1的信号输出引脚PA0，第一开关器件120的控制端连接第一控制芯片U1的信号控制引脚PA6。第一开关器件120为三极管M1，可以是场效应晶体管，例如MOS场效应晶体管。在本实施例中，该三极管M1采用P型低压MOS场效应晶体管SI2305，该MOS管的S极连接第一防反模块130、D极连接信号输出引脚PA0、G极连接信号控制引脚PA6。充电器端USB充电控制电路还可以包括第一电阻器R1和第一电容器C1，该MOS管的D极和G极之间还连接有第一电阻器R1，G极还通过第一电容器C1接地。第一电阻器R1的阻值可以是10K，第一电容器C1的电容值可以是0.1μF。The positive pole D+ of the data line of the USB socket 110 is also connected to the signal output pin PA0 of the first control chip U1 through the first anti-reverse module 130 and the first switch device 120 in sequence, and the control terminal of the first switch device 120 is connected to the first control chip. The signal from U1 controls pin PA6. The first switching device 120 is a triode M1, which may be a field effect transistor, such as a MOS field effect transistor. In this embodiment, the triode M1 is a P-type low-voltage MOS field effect transistor SI2305, the S pole of the MOS transistor is connected to the first anti-reverse module 130, the D pole is connected to the signal output pin PA0, and the G pole is connected to the signal control pin PA6 . The USB charging control circuit at the charger end may also include a first resistor R1 and a first capacitor C1, the first resistor R1 is also connected between the D pole and the G pole of the MOS tube, and the G pole is also grounded through the first capacitor C1 . The resistance of the first resistor R1 may be 10K, and the capacitance of the first capacitor C1 may be 0.1 μF.

USB母座110的数据线负极D-连接信号接收引脚PA3，数据线负极D-还通过第二防反模块140接地。同样，第二防反模块140是用于防反接的，可以为二极管D2，该二极管D2的正极连接USB母座110的数据线负极D-，该二极管D2的负极接地。该二极管D2可以为肖特基二极管。在本实施例中，该二极管D2采用IN5819肖特基二极管。The negative pole D− of the data line of the USB socket 110 is connected to the signal receiving pin PA3 , and the negative pole D− of the data line is also grounded through the second anti-reverse module 140 . Similarly, the second anti-reverse module 140 is used for anti-reverse connection, which can be a diode D2, the anode of the diode D2 is connected to the negative electrode D- of the data line of the USB receptacle 110, and the negative electrode of the diode D2 is grounded. The diode D2 can be a Schottky diode. In this embodiment, the diode D2 is an IN5819 Schottky diode.

以下描述在第一控制芯片U1的控制下该电路的工作原理。The working principle of the circuit under the control of the first control chip U1 is described below.

在本实施例中，当电源线P+和接地线P-接入供电环路(即正常连接外部设备)时，通过信号控制引脚PA6控制第一开关器件120导通，通过信号输出引脚PA0发出预设的检测信号。如果第一开关器件120为上述的P型MOS管，则第一控制芯片U1通过信号控制引脚PA6输出低电平信号以控制第一开关器件120导通。预设的检测信号是能够被特定的外部设备(例如与该充电器搭配的终端)识别的信号，可以是设定的方波信号、正弦波信号、脉冲信号等等，例如设定频率的脉冲信号。In this embodiment, when the power line P+ and the ground line P- are connected to the power supply loop (that is, they are normally connected to external devices), the first switching device 120 is controlled to conduct through the signal control pin PA6, and the signal output pin PA0 Send a preset heartbeat. If the first switching device 120 is the above-mentioned P-type MOS transistor, the first control chip U1 outputs a low-level signal through the signal control pin PA6 to control the first switching device 120 to be turned on. The preset detection signal is a signal that can be recognized by a specific external device (such as a terminal matched with the charger), and can be a set square wave signal, a sine wave signal, a pulse signal, etc., such as a pulse with a set frequency Signal.

在本实施例中，在第一控制芯片U1通过信号控制引脚PA6发出预设的检测信号之后，当信号接收引脚PA3接收到预设的反馈信号时，通过信号控制引脚PA6控制第一开关器件120断开，通过电压输出引脚PA5输出供电电流。预设的反馈信号是可以被第一控制芯片U1识别的信号，以识别正在连接电路的外部设备是否为特定的外部设备。同样，预设的反馈信号也可以是设定的方波信号、正弦波信号、脉冲信号等等。进行充电时，为了保护第一控制芯片U1，需要将第一开关器件120断开，以免充电电压直接加压在信号输出引脚PA0。In this embodiment, after the first control chip U1 sends a preset detection signal through the signal control pin PA6, when the signal receiving pin PA3 receives a preset feedback signal, the first control chip U1 controls the first through the signal control pin PA6. The switching device 120 is turned off, and the supply current is output through the voltage output pin PA5. The preset feedback signal is a signal that can be identified by the first control chip U1 to identify whether the external device being connected to the circuit is a specific external device. Similarly, the preset feedback signal can also be a set square wave signal, sine wave signal, pulse signal and so on. When charging, in order to protect the first control chip U1 , the first switching device 120 needs to be turned off, so as to prevent the charging voltage from being directly applied to the signal output pin PA0 .

在一些实施例中，当第一控制芯片U1的信号接收引脚PA3接收到预设的反馈信号时，电压输出引脚PA5并不马上输出供电电流，而是经过预设的缓冲时间后，再通过信号控制引脚PA6控制第一开关器件120断开，通过电压输出引脚PA5输出供电电流。缓冲时间是用于使得充电器端和外部设备都有足够的时间去设置参数以准备利用USB母座110的数据线进行充电，缓冲时间在本实施例中为1分钟。In some embodiments, when the signal receiving pin PA3 of the first control chip U1 receives a preset feedback signal, the voltage output pin PA5 does not output the supply current immediately, but after a preset buffer time, and then The signal control pin PA6 controls the first switch device 120 to turn off, and the voltage output pin PA5 outputs the supply current. The buffer time is used to make the charger and the external device have enough time to set parameters to prepare for charging with the data line of the USB socket 110, and the buffer time is 1 minute in this embodiment.

上述的充电器端USB充电控制电路，电压输出引脚PA5在充电时可以输出与电源引脚DVCC一致或差不多的直流电压，从而使得对外输出的供电电流增加一倍左右，实现了大电流充电，提高了充电效率。当然，如果上述的充电器端USB充电控制电路并没有接收到预设的反馈信号，则电压输出引脚PA5并不会输出供电电流，USB母座110的数据线正极D+和数据线负极D-也不会对外供电，只有电源线P+和接地线P-接入对外的供电环路。In the USB charging control circuit at the charger end mentioned above, the voltage output pin PA5 can output a DC voltage that is consistent with or almost the same as the power supply pin DVCC during charging, so that the external output power supply current is doubled, and high current charging is realized. The charging efficiency is improved. Of course, if the above-mentioned USB charging control circuit at the charger end does not receive the preset feedback signal, the voltage output pin PA5 will not output the supply current, and the positive data line D+ and the negative data line D- of the USB socket 110 There is no external power supply, only the power line P+ and the ground line P- are connected to the external power supply loop.

上述的充电器端USB充电控制电路可以应用于智能终端的充电器中，而且该充电器既能对特定的外部设备(即下述的本发明的便携式多功能设备)进行大电流充电，也能对普通的外部设备进行普通充电，实现充电器的广泛通用。The above-mentioned USB charging control circuit at the charger end can be applied to a charger of an intelligent terminal, and the charger can not only charge a specific external device (i.e. the portable multifunctional device of the present invention described below) with a large current, but also can Carry out ordinary charging for ordinary external devices, and realize the wide use of chargers.

上述的充电器端USB充电控制电路和充电器，包括USB母座110、第一控制芯片U1、第一开关器件120、第一防反模块130和第二防反模块140。USB母座110包括电源线P+、接地线P-、数据线正极D+和数据线负极D-。在连接普通的终端进行充电时，只有电源线P+在充电，接地线P-保证接地，形成充电回路。在连接具有上述终端USB充电控制电路的终端进行充电时，第一控制芯片U1可以通过电压输出引脚PA5向数据线正极D+输出充电电流，从而使得USB母座110的电源线P+和数据线正极D+都输出充电电流，提高了充电效率。The aforementioned USB charging control circuit at the charger end and the charger include a USB socket 110 , a first control chip U1 , a first switching device 120 , a first anti-reverse module 130 and a second anti-reverse module 140 . The USB socket 110 includes a power line P+, a ground line P−, a positive data line D+ and a negative data line D−. When connecting to an ordinary terminal for charging, only the power line P+ is charging, and the ground line P- is guaranteed to be grounded to form a charging circuit. When connecting a terminal with the above-mentioned terminal USB charging control circuit for charging, the first control chip U1 can output charging current to the positive pole of the data line D+ through the voltage output pin PA5, so that the power line P+ of the USB socket 110 and the positive pole of the data line Both D+ output the charging current, which improves the charging efficiency.

图2为一个实施例的终端USB充电控制电路图。Fig. 2 is a circuit diagram of a terminal USB charging control circuit of an embodiment.

对应上述的充电器端USB充电控制电路，本发明还提供一种终端USB充电控制电路，其包括：USB公座210，第二控制芯片U2、第二开关器件220、第三开关器件230、第三防反模块240和第四防反模块250。Corresponding to the above USB charging control circuit at the charger end, the present invention also provides a terminal USB charging control circuit, which includes: a USB male socket 210, a second control chip U2, a second switching device 220, a third switching device 230, a The third anti-anti-module 240 and the fourth anti-anti-module 250 .

USB公座210是和上述的USB母座110相对应的，其包括电源线p+、接地线p-、数据线正极d+和数据线负极d-。USB公座210是和上述的USB母座110在连接时，电源线p+、接地线p-、数据线正极d+和数据线负极d-分别对应连接上述的电源线P+、接地线P-、数据线正极D+和数据线负极D-。现有技术中，电源线p+和接地线p-主要用于充电，数据线正极d+和数据线负极d-主要用于数据传输。在本发明中，电源线p+和接地线p-主要用于充电，数据线正极d+和数据线负极d-既可以在传输数据时用于数据传输，又可以在充电时用于充电。The USB male socket 210 is corresponding to the above-mentioned USB female socket 110, and includes a power line p+, a ground line p-, a positive data line d+ and a negative data line d-. When the USB male seat 210 is connected to the above-mentioned USB female seat 110, the power line p+, ground line p-, data line positive d+ and data line negative d- are respectively connected to the above-mentioned power line P+, ground line P-, data Line positive D+ and data line negative D-. In the prior art, the power line p+ and the ground line p- are mainly used for charging, and the positive pole d+ of the data line and the negative pole d- of the data line are mainly used for data transmission. In the present invention, the power line p+ and the ground line p- are mainly used for charging, and the positive pole d+ and the negative pole d- of the data line can be used for data transmission during data transmission, and can also be used for charging during charging.

第二控制芯片U2也可以是单片机，在本实施例中，第二控制芯片U2也采用应广公司的PMC150系列单片机。The second control chip U2 can also be a single-chip microcomputer. In this embodiment, the second control chip U2 also adopts the PMC150 series single-chip microcomputer of Yingguang Company.

第二控制芯片U2包括电源引脚DVCC、信号输出引脚PA0、信号控制引脚PA6和信号接收引脚PA3。USB公座210的电源线p+连接电源引脚DVCC，接地线p-接地。电源引脚DVCC连接智能终端的电池以使得电源线p+可以对电池充电，对于手机之类的智能终端而言，该充电电压通常为5V。The second control chip U2 includes a power supply pin DVCC, a signal output pin PA0, a signal control pin PA6 and a signal receiving pin PA3. The power line p+ of the USB socket 210 is connected to the power pin DVCC, and the ground line p- is grounded. The power pin DVCC is connected to the battery of the smart terminal so that the power line p+ can charge the battery. For smart terminals such as mobile phones, the charging voltage is usually 5V.

USB公座210的数据线正极d+通过第三防反模块240连接电压输出引脚PA5；第三防反模块240是用于防反接的，可以为二极管D3，该二极管D3的负极连接电源引脚DVCC，该二极管D3的正极连接数据线正极d+。该二极管D3可以为肖特基二极管。在本实施例中，该二极管D3采用IN5819肖特基二极管。The positive pole d+ of the data line of the USB public seat 210 is connected to the voltage output pin PA5 through the third anti-reverse module 240; Pin DVCC, the anode of the diode D3 is connected to the anode d+ of the data line. The diode D3 can be a Schottky diode. In this embodiment, the diode D3 is an IN5819 Schottky diode.

USB公座210的数据线正极d+还通过第二开关器件220连接信号接收引脚PA3，第二开关器件220的控制端连接信号控制引脚PA6。第二开关器件220为三极管M2，可以是场效应晶体管，例如MOS场效应晶体管。在本实施例中，该三极管M2采用P型低压MOS场效应晶体管SI2305，该MOS管的S极连接信号接收引脚PA3、D极连接数据线正极d+、G极连接信号控制引脚PA6。终端USB充电控制电路还可以包括第二电阻器R2和第二电容器C2，D极和G极之间还连接有第二电阻器R2，G极还通过第二电容器C2接地。第二电阻器R2的阻值可以是10K，第二电容器C2的电容值可以是0.1μF。The anode d+ of the data line of the USB male socket 210 is also connected to the signal receiving pin PA3 through the second switch device 220 , and the control terminal of the second switch device 220 is connected to the signal control pin PA6 . The second switching device 220 is a triode M2, which may be a field effect transistor, such as a MOS field effect transistor. In this embodiment, the triode M2 is a P-type low voltage MOS field effect transistor SI2305, the S pole of the MOS transistor is connected to the signal receiving pin PA3, the D pole is connected to the positive pole d+ of the data line, and the G pole is connected to the signal control pin PA6. The terminal USB charging control circuit may further include a second resistor R2 and a second capacitor C2, the second resistor R2 is connected between the D pole and the G pole, and the G pole is grounded through the second capacitor C2. The resistance value of the second resistor R2 may be 10K, and the capacitance value of the second capacitor C2 may be 0.1 μF.

USB公座210的数据线负极d-依次通过第四防反模块250、第三开关器件230接地，第三开关器件230的控制端连接信号输出引脚PA0。同样，第四防反模块250是用于防反接的，可以为二极管D4，该二极管D4的正极连接数据线负极d-，该二极管D4的负极接地。该二极管D4可以为肖特基二极管。在本实施例中，该二极管D4采用IN5819肖特基二极管。第三开关器件230为三极管M3，可以是场效应晶体管，例如MOS场效应晶体管。在本实施例中，该MOS管的S极连接第三防反模块240、D极接地、G极连接信号输出引脚PA0。The negative electrode d− of the data line of the USB male socket 210 is grounded sequentially through the fourth anti-reverse module 250 and the third switching device 230 , and the control terminal of the third switching device 230 is connected to the signal output pin PA0 . Similarly, the fourth anti-reverse module 250 is used for anti-reverse connection, which may be a diode D4, the anode of the diode D4 is connected to the negative electrode d- of the data line, and the cathode of the diode D4 is grounded. The diode D4 can be a Schottky diode. In this embodiment, the diode D4 is an IN5819 Schottky diode. The third switching device 230 is a triode M3, which may be a field effect transistor, such as a MOS field effect transistor. In this embodiment, the S pole of the MOS transistor is connected to the third anti-reverse module 240 , the D pole is grounded, and the G pole is connected to the signal output pin PA0 .

以下描述在第二控制芯片U2的控制下该电路的工作原理。The working principle of the circuit under the control of the second control chip U2 is described below.

在本实施例中，当电源线p+和接地线p-接入充电环路(即正常连接充电器)时，通过信号控制引脚PA6控制第二开关器件220导通，通过信号接收引脚PA3接收预设的检测信号。如果第二开关器件220为上述的P型MOS管，则第二控制芯片U2通过信号控制引脚PA6输出低电平信号以控制第二开关器件220导通。预设的检测信号就是上述充电器端USB充电控制电路所发出的检测信号，可以是设定的方波信号、正弦波信号、脉冲信号等等，例如设定频率的脉冲信号。第二控制芯片U2识别出该信号，就认为当前的充电器是搭配的充电器。In this embodiment, when the power line p+ and the ground line p- are connected to the charging loop (that is, the charger is normally connected), the second switching device 220 is controlled to be turned on through the signal control pin PA6, and the second switching device 220 is controlled through the signal receiving pin PA3 Receive a preset detection signal. If the second switching device 220 is the above-mentioned P-type MOS transistor, the second control chip U2 outputs a low level signal through the signal control pin PA6 to control the second switching device 220 to be turned on. The preset detection signal is the detection signal sent by the above-mentioned USB charging control circuit at the charger end, which may be a set square wave signal, a sine wave signal, a pulse signal, etc., such as a pulse signal with a set frequency. When the second control chip U2 recognizes the signal, it considers that the current charger is a matched charger.

在本实施例中，第二控制芯片U2接收到预设的检测信号之后，通过信号输出引脚PA0输出预设的反馈信号。该预设的反馈信号经过控制第三开关器件230的G极，使得第三开关器件230的S极产生相应的反馈信号，该相应的反馈信号就是上述充电器端USB充电控制电路所接收到的反馈信号，是可以被上述充电器端USB充电控制电路识别的信号。加在G极的反馈信号可以是设定的方波信号、正弦波信号、脉冲信号等等，如果加在G极的反馈信号是方波信号，将使得S极产生与该方波信号反相的方波信号。In this embodiment, after receiving the preset detection signal, the second control chip U2 outputs a preset feedback signal through the signal output pin PA0. The preset feedback signal controls the G pole of the third switching device 230, so that the S pole of the third switching device 230 generates a corresponding feedback signal, and the corresponding feedback signal is received by the USB charging control circuit at the charger end. The feedback signal is a signal that can be recognized by the USB charging control circuit at the charger end. The feedback signal applied to the G pole can be a set square wave signal, sine wave signal, pulse signal, etc. If the feedback signal applied to the G pole is a square wave signal, it will cause the S pole to generate an inverse phase to the square wave signal. square wave signal.

在本实施例中，第二控制芯片U2输出反馈信号后，通过信号控制引脚PA6控制第二开关器件220断开，通过信号输出引脚PA0控制第三开关器件230导通。这个时候，终端USB充电控制电路准备利用USB母座110的数据线进行充电，因此为了保护第二控制芯片U2，需要将第二开关器件220断开，以免充电电压直接加压在信号输出引脚PA0。数据线正极d+是连接着第二控制芯片U2的电源引脚DVCC的，而电源引脚DVCC又连接着终端的电池，因此当数据线正极d+有充电电流输入时，直接通过第三防反模块240对终端的电池进行充电，而数据线负极d-也通过导通的第三开关器件230直接接地，从而形成了两条数据线充电的充电环路。In this embodiment, after the second control chip U2 outputs the feedback signal, the second switch device 220 is controlled to be turned off through the signal control pin PA6, and the third switch device 230 is controlled to be turned on through the signal output pin PA0. At this time, the terminal USB charging control circuit is ready to use the data line of the USB socket 110 for charging. Therefore, in order to protect the second control chip U2, the second switching device 220 needs to be disconnected to prevent the charging voltage from being directly applied to the signal output pin. PA0. The positive pole d+ of the data line is connected to the power pin DVCC of the second control chip U2, and the power pin DVCC is connected to the battery of the terminal, so when the positive pole d+ of the data line has a charging current input, it directly passes through the third anti-reverse module 240 charges the battery of the terminal, and the negative electrode d− of the data line is also directly grounded through the turned-on third switching device 230 , thus forming a charging loop for charging the two data lines.

同样在一些实施例中，第二控制芯片U2输出反馈信号后，经过预设的缓冲时间，通过信号控制引脚PA6控制第二开关器件220断开，通过信号输出引脚PA0控制第三开关器件230导通。缓冲时间是用于使得本终端和充电器端都有足够的时间去设置参数以准备利用USB公座210的数据线进行充电，缓冲时间在本实施例中为1分钟。Also in some embodiments, after the second control chip U2 outputs the feedback signal, after a preset buffer time, the second switching device 220 is controlled to be turned off through the signal control pin PA6, and the third switching device is controlled through the signal output pin PA0 230 is turned on. The buffer time is used to make both the terminal and the charger have enough time to set parameters to prepare for charging with the data cable of the USB socket 210, and the buffer time is 1 minute in this embodiment.

上述的终端USB充电控制电路，数据线正极d+在充电时可以获取到与电源引脚DVCC一致或差不多的直流电流，从而使得对终端电池的充电电流增加一倍左右，实现了大电流充电，提高了充电效率。当然，如果上述的终端USB充电控制电路没有接收到预设的检测信号，则意味着充电器为普通的充电器，USB公座210的数据线正极d+和数据线负极d-并不会接收到相应的充电电流，只有电源线p+和接地线p-接入充电环路。In the above-mentioned terminal USB charging control circuit, the positive electrode d+ of the data line can obtain a DC current consistent with or almost the same as that of the power supply pin DVCC during charging, so that the charging current of the terminal battery is doubled, realizing high-current charging and improving charging efficiency. Of course, if the above-mentioned terminal USB charging control circuit does not receive the preset detection signal, it means that the charger is an ordinary charger, and the data line positive d+ and data line negative d- of the USB socket 210 will not receive Corresponding to the charging current, only the power line p+ and the ground line p- are connected to the charging loop.

上述的终端USB充电控制电路可以应用于智能终端中，例如手机、平板电脑、PSP等等便携式多功能设备。而且该便携式多功能设备既能应用特定的充电器(即上述的本发明的充电器)进行大电流充电，也能应用普通的充电器进行普通充电，通用性较好。The terminal USB charging control circuit described above can be applied to smart terminals, such as mobile phones, tablet computers, PSPs and other portable multifunctional devices. Moreover, the portable multifunctional device can not only use a specific charger (namely the above-mentioned charger of the present invention) for high-current charging, but also use an ordinary charger for ordinary charging, and has good versatility.

上述的终端USB充电控制电路和便携式多功能设备，包括：USB公座210，第二控制芯片U2、第二开关器件220、第三开关器件230、第三防反模块240和第四防反模块250。在连接普通的充电器时，只有电源线p+在充电，接地线p-保证接地，形成充电回路。在连接具有上述充电器端USB充电控制电路的充电器进行充电时，第二控制芯片U2可以通过电源引脚DVCC从数据线正极d+获取充电电流，从而使得USB公座210的电源线p+和数据线正极d+都能获取充电电流，提高了充电效率。The above-mentioned terminal USB charging control circuit and portable multi-function device include: USB public seat 210, second control chip U2, second switching device 220, third switching device 230, third anti-reverse module 240 and fourth anti-reverse module 250. When connecting to an ordinary charger, only the power line p+ is charging, and the ground line p- is guaranteed to be grounded to form a charging loop. When connecting the charger with the above-mentioned USB charging control circuit on the charger side for charging, the second control chip U2 can obtain charging current from the positive pole d+ of the data line through the power supply pin DVCC, so that the power line p+ of the USB socket 210 and the data The positive electrode d+ of the line can obtain the charging current, which improves the charging efficiency.

当上述的充电器端USB充电控制电路的USB母座110与上述的终端USB充电控制电路的USB公座210连接上后，形成充电系统，即可实现大电流充电。图3为一个实施例的充电系统电路图。When the USB receptacle 110 of the USB charging control circuit at the charger end is connected with the USB male receptacle 210 of the terminal USB charging control circuit, a charging system is formed to realize high-current charging. Fig. 3 is a circuit diagram of a charging system of an embodiment.

以上所述仅是本发明的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above descriptions are only part of the embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principles of the present invention. It should be regarded as the protection scope of the present invention.

Claims (24)

1. a kind of charger end USB charging control circuit characterized by comprising USB female seat, the first control chip, first openClose device, the first counnter attack module and the second counnter attack module；

The USB female seat includes power supply line P+, ground line P-, data line anode D+ and data line cathode D-；First controlChip includes that power pins, voltage output pin, signal output pin, signal control pin and signal receive pin；

The power supply line P+ connection power pins, the ground line P- ground connection；

The data line anode D+ connects the voltage output pin by the first counnter attack module；The data line anode D+ also according toIt is secondary to pass through the first counnter attack module, the first switch device connection signal output pin, the control of the first switch deviceEnd processed connects the signal and controls pin；

The data line cathode D- connection signal receives pin, and the data line cathode D- also passes through the second counnter attack module and connectsGround.

2. charger end USB charging control circuit according to claim 1, which is characterized in that the first control chipFor single-chip microcontroller.

3. charger end USB charging control circuit according to claim 1, which is characterized in that the first switch deviceFor field effect transistor.

4. charger end USB charging control circuit according to claim 3, which is characterized in that further include first resistor device；The first switch device is p-type metal-oxide-semiconductor, and the pole S of the p-type metal-oxide-semiconductor connects the first counnter attack module, the pole D connects the signalOutput pin, the pole G connect the signal and control pin, are also connected with first resistor device between the pole S and the pole G.

5. charger end USB charging control circuit according to claim 4, which is characterized in that it further include first capacitor device,The pole G also passes through first capacitor device and is grounded.

6. charger end USB charging control circuit according to claim 1, which is characterized in that the first counnter attack module and/orSecond counnter attack module is diode, and the cathode of the first counnter attack module connects the data line anode D+, and the second counnter attack module is bornPole ground connection.

7. charger end USB charging control circuit according to claim 6, which is characterized in that the diode is Xiao TeBased diode.

8. charger end USB charging control circuit according to claim 1, which is characterized in that the first control chipFor:

As the power supply line P+ and ground line P- access power supply loop, pin is controlled by the signal and controls first switch devicePart conducting issues preset detection signal by the signal output pin.

9. charger end USB charging control circuit according to claim 8, which is characterized in that the first control chipFor:

After issuing preset detection signal, when the signal, which receives pin, receives preset feedback signal, pass through instituteIt states signal control pin control first switch device to disconnect, supply current is exported by the voltage output pin.

10. charger end USB charging control circuit according to claim 9, which is characterized in that the first control chipFor:

When the signal, which receives pin, receives preset feedback signal, by preset buffer time, pass through the signalIt controls pin control first switch device to disconnect, supply current is exported by the voltage output pin.

11. a kind of charger, which is characterized in that it includes the charger end USB charging control as described in claim 1~10 is anyCircuit processed.

12. a kind of terminal USB charging control circuit characterized by comprising USB male seat, the second control chip, second switchDevice, third switching device, third counnter attack module and the 4th counnter attack module；

The USB male seat includes power supply line p+, ground line p-, data line anode d+ and data line cathode d-；Second controlChip includes that power pins, signal output pin, signal control pin and signal receive pin；

The power supply line p+ connection power pins, the ground line p- ground connection；

The data line anode d+ connects the power pins by third counnter attack module；The data line anode d+ also passes through instituteIt states second switch device and connects the signal reception pin, the control terminal of the second switch device connects the signal control and drawsFoot；

The data line cathode d- passes sequentially through the 4th counnter attack module, third switching device ground connection, the third switching deviceControl terminal connects the signal output pin.

13. terminal USB charging control circuit according to claim 12, which is characterized in that described second, which controls chip, isSingle-chip microcontroller.

14. terminal USB charging control circuit according to claim 12, which is characterized in that the second switch device and/Or third switching device is field effect transistor.

15. terminal USB charging control circuit according to claim 14, which is characterized in that further include second resistor；InstituteStating second switch device is p-type metal-oxide-semiconductor, and the pole S of the p-type metal-oxide-semiconductor connects the signal and receives pin, the pole the D connection numberThe signal is connected according to the line pole anode d+, G and controls pin, is also connected with second resistor between the pole S and the pole G.

16. terminal USB charging control circuit according to claim 15, which is characterized in that further include the second capacitor；InstituteIt states the pole G and also passes through the second capacitor grounding.

17. terminal USB charging control circuit according to claim 14, which is characterized in that the third switching device is PType metal-oxide-semiconductor, the pole S of the p-type metal-oxide-semiconductor connects the third counnter attack module, the pole D is grounded, the pole G connects the signal output and drawsFoot.

18. terminal USB charging control circuit according to claim 12, which is characterized in that third counnter attack module and/orFour counnter attack modules are diode, and the cathode of third counnter attack module connects the power pins, the cathode connection of the 4th counnter attack moduleThe data line cathode d-.

19. terminal USB charging control circuit according to claim 18, which is characterized in that the diode is SchottkyDiode.

20. terminal USB charging control circuit according to claim 12, which is characterized in that the second control chip is usedIn:

As the power supply line p+ and ground line p- access power supply loop, pin is controlled by the signal and controls second switch devicePart conducting receives pin by the signal and receives preset detection signal.

21. terminal USB charging control circuit according to claim 20, which is characterized in that the second control chip is usedIn:

After receiving preset detection signal, preset feedback signal is exported by the signal output pin.

22. terminal USB charging control circuit according to claim 21, which is characterized in that the second control chip is usedIn:

After exporting the feedback signal, pin is controlled by the signal and controls the second switch device disconnection, by describedSignal output pin controls the third switch device conductive.

23. terminal USB charging control circuit according to claim 22, which is characterized in that the second control chip is usedIn:

After exporting the feedback signal, by preset buffer time, pin control described second is controlled by the signal and is openedIt closes device to disconnect, the third switch device conductive is controlled by the signal output pin.

24. a kind of portable multifunction device, which is characterized in that it includes the terminal as described in claim 12~23 is anyUSB charging control circuit.