Type-C Bluetooth speaker single port rechargeable OTG solution

At present, most of the Bluetooth speakers on the market still use USB-micro Interface , The charging power is only 5-10W, Not only is the charging efficiency slow , And the Bluetooth speaker wants to connect U One more disk should be set USB-A Female seat , add TF Card slot ,3.5MM headphone jack , It seems numerous and complicated .

Although many manufacturers have adopted Type-C Interface , But only as a charging interface , For cross era type-c Interface , Somewhat overqualified , So there's no way , To make a type-c The interface can be charged , You can also take OTG？ For example, you can connect when you are not charging U disc , And in case of emergency, it can even be used as a mobile power supply to charge the mobile phone in reverse .

The answer is yes , single C If you want to be rechargeable, you can OTG, Then you have to use PD Protocol chip , Let alone C Mouth as a DRP, When connecting the adapter , Bluetooth speaker as UFP, adopt CC The communication applies for voltage from the adapter , For example, apply for 9/12V Voltage to quickly charge the built-in lithium battery ; Picking up U At the time of the dish , Bluetooth speakers are switched to DFP, External output 5V to U Panel power supply , Read at the same time U The data on the disc is used to play music .

We learned that one was called LDR6035 Of PD Protocol chip ,  It is designed for Bluetooth speakers C The port can be recharged OTG The design of the , As a DRP chip , In different scenarios , adopt CC The communication identification will automatically switch between different devices DFP/UFP, This saves the cost of multiple interfaces for Bluetooth speakers , Product design can also be simpler .

LDR6035 It's lederi technology for USB Type-C Standard Bridge Developed for equipment USB-C DRP Interface USB PD Communication chip . Switching can be realized Data Role function , For smart devices ( The computer , Flat , mobile phone ) PDO And REQUEST negotiation , Automatically DR_SWAP To UFP Pattern .

 

LDR6035 characteristic ：

1. SSOP-16 encapsulation , The periphery is streamlined

2. Support USB PD 2.0, compatible USB PD 3.0

3. Provided to equipment 5V PDO And REQUEST negotiation

4. Automatically DR_SWAP To UFP Pattern

Main application scenarios ：

1.USB TYPE-C Bluetooth speakers

2.USB Type-C Smart small appliances

The schematic diagram of the reference scheme is as follows ：