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Auto-switching module for power supply and charging of OTG and control method thereof

A technology for automatically switching modules and chargers, which is applied in electrical digital data processing, instruments, and energy-saving calculations. It can solve problems such as short service life, poor reliability, and high power consumption, and achieve long service life, easy integration, and high cost performance. Effect

Active Publication Date: 2019-02-26
成都圣成通幽科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the problem of this patented circuit design cannot realize the function of automatic switching well; secondly, the relay itself has many defects: large size, high power consumption, poor reliability, easy damage, short service life, and cannot be really applied to small volume, cost-effective products
[0013] Chinese Patent No. 201310396425.4 discloses a USB OTG device, electronic equipment and a method for implementing OTG functions, which can judge the status of external devices through the MCU, but it does not explain what to do next, or it is unclear where the application is

Method used

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  • Auto-switching module for power supply and charging of OTG and control method thereof

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Experimental program
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Effect test

Embodiment

[0039] see figure 1 , this embodiment includes a CMOS chip U1, a No. 1 interface J1 for connecting a Host device with an OTG function, a No. 2 interface J2 for connecting a charger, and a No. 3 interface J3 for connecting an external device that requires OTG power supply .

[0040] The first interface J1 is connected to the USB interface of the host device with OTG function, such as mobile phone, tablet computer, etc.; the second interface J2 is connected to the USB interface of the charger; the third interface J3 is used to connect any kind of device that needs OTG power supply. External devices such as mobile hard disks, printers, etc.

[0041] The three interfaces all include four pins V(vcc), D+(data+), D-(data-), and G(gnd). The same pins are electrically connected to each other, and the first interface J1 (J1) is also set There is a pin S (Sense).

[0042] The data is transmitted between the first interface J1 and the third interface J3 through the D+ and D- pins, and...

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Abstract

The invention provides an Auto-switching module for power supply and charging of OTG and control method thereof, comprising a CMOS chip for connecting a first interface of a Host device with an OTG function, a second interface of a charger, and a third interface of an external device requiring OTG power supply. The CMOS chip comprises an E port, a Y port, a Z port, an E port is electrically connected with the second interface, a Z port is grounded, and the Y port is electrically connected with the first interface. In the use process of the external equipment, the invention does not need manualswitch, and the equipment supporting the OTG function can automatically switch the OTG power supply mode and the charging mode. The OTG equipment can be charged in a state of keeping the external equipment in uninterrupted use; At the same time, CMOS chip is used as the core device to automatically identify and control the switching of OTG and charging mode, which is small in size, low in cost, negligible in power consumption, long in service life, high in cost performance, easy to integrate, and is conducive to large-scale production.

Description

technical field [0001] The invention relates to an OTG power supply and charging automatic switching module and a control method thereof, which are mainly used for OTG data / charging lines, OTG external devices and the like. Background technique [0002] The development of USB technology enables PCs and peripheral devices to connect devices with various data transmission speeds together in a simple way and with moderate manufacturing costs. Connect to PC via USB, and perform data exchange under the control of PC. [0003] However, once this convenient exchange method leaves the PC, the devices cannot be operated through the USB port, because no slave device can act as a host like a PC. [0004] OTG is the abbreviation of On-The-Go. It is a technology developed in recent years. It is mainly used in the connection between various devices or mobile devices for data exchange. Such as Pad, mobile phone, tablet computer, digital camera, video camera, printer and other equipment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/40
CPCG06F13/4068G06F2213/0042Y02D10/00
Inventor 杨文朗
Owner 成都圣成通幽科技有限公司