Although many manufacturers have adopted the Type-C interface, it is only used as a charging interface. For the cross-generation type-c interface, it is somewhat overkill. So is there any way to make a type-c interface chargeable? , and can connect to OTG? For example, it can be connected to a USB flash drive when not charging, and it can even be used as a mobile power supply to reversely charge the mobile phone in an emergency.
The answer is yes, if the single-C port wants to do fast charging, but also supports OTG to transmit USB2.0 data, then a PD protocol chip must be used, so that the single-C port can be used as a DRP, when connected to an adapter, such as a Bluetooth speaker As a UFP, apply voltage to the adapter through CC communication, such as applying for 9/12V voltage to quickly charge the built-in lithium battery; when connected to a U disk, the Bluetooth speaker turns into a DFP, and outputs 5V to supply power to the U disk, and reads the U disk at the same time the data in to play music.
We learned that a PD protocol chip named LDR6035 is specially designed for Bluetooth speakers with single C-port rechargeable and OTG. As a DRP chip, in different usage scenarios, the devices inserted through CC communication will be different Automatically switch DFP/UFP, which saves the cost of multiple interfaces for Bluetooth speakers, and the product design can be simpler.
LDR6035 is a USB-C DRP interface USB PD communication chip developed by Ledry Technology for Bridge devices in the USB Type-C standard. It can realize the function of switching Data Role, provide PDO and REQUEST negotiation for smart devices (computers, tablets, mobile phones), and automatically convert DR_SWAP to UFP mode.
LDR6035 features:
SSOP-16 package with reduced peripheral
Support USB PD 2.0, Compatible with USB PD 3.0
Provided to equipment 5V PDO and REQUEST negotiation
Automatically convert DR_SWAP to UFP mode
Main application scenarios:
1.USB TYPE-C Bluetooth speaker
2. USB Type-C Smart Home Appliances
The schematic diagram of the reference scheme is as follows:
