What does OTG mean?
How is OTG implemented?
How does a mobile phone with a TYPE-C interface realize the simultaneous charging + OTG function?
What does OTG mean?
OTG is the abbreviation of On-The-Go, which is an emerging technology, mainly used in the connection between different devices or mobile devices for data exchange. Through OTG technology, it is possible to expand USB interface accessories for smart terminals to enrich the functions of smart terminals, such as extending remote control accessories, turning mobile phones and tablets into universal remote controls.
OTG is a new USB transmission technology, which is the abbreviation of On-The-Go. It is an emerging technology and is mainly used in the connection between different devices or mobile devices for data exchange. Through OTG technology, it is possible to expand USB interface accessories for smart terminals to enrich the functions of smart terminals, such as extending remote control accessories, turning mobile phones and tablets into universal remote controls.
The role of the OTG function on the mobile phone
1. As a power supply to another mobile phone or tablet
Required equipment: an OTG cable + a USB data cable
Phone A is plugged into the OTG cable, and the other end is connected to the phone or tablet B through a USB data cable, and then A can be used to charge B.
2. Expand the memory of mobile phones and tablets
Required equipment: an OTG U disk / an OTG cable + a U disk
When the mobile phone and tablet memory are not enough, use an OTG U disk to connect the mobile phone, or use an OTG cable to connect the ordinary U disk and then connect to the mobile phone, then you can store the redundant data of the mobile phone in the U disk, freeing up more space for the mobile phone. Large memory space.
How can the mobile phone with YPE-C interface realize the simultaneous charging + OTG function?
Add a Type-C interface protocol logic chip, communicate and shake hands through the CC protocol, and process the device, charger, data, and power supply for master-slave role switching, so as to realize the function of simultaneous charging of Type-C devices + OTG
LDR6028 SOP8 is a USB-C DRP interface USB PD communication chip developed by Ledry Technology for Bridge devices in the USB Type-C standard. It has the function of switching Data Role to realize the demand of listening to music while charging, and has been specially optimized for the USB-C compatibility of major mobile phone brands, and is suitable for the application scenarios of mobile phone audio and USB2.0 data transmission adapters.
From the figure below, we can see that the external components of this PD chip are very simple, only need 2 MOS to control charge and discharge management, and can realize the function of OTG while charging, D+D- directly connected to the required function IC Can.
