Nowadays, most Android phones have removed the 3.5 audio interface and replaced the headphones with a type-c interface, making it difficult for phones to charge while listening to music. There are such converters available online, which can solve this problem. So what is the principle of these converters? LDR6023C teaches you how to implement a USB type-C mobile phone fast charging audio solution to meet the needs of simultaneous charging and listening to music!

These converters are equipped with a built-in PD protocol chip, which allows the charger to charge the phone while also enabling audio functions through headphones. The following is a simple schematic diagram.

There are two main chips in the plan, one is the PD protocol handshake chip LDR6023C, and the other is the USB sound card chip, which is used to convert the USB port into a 3.5mm headphone interface. The USB sound card chip has no restrictions and can be selected at will.

LDR6023C application diagram

LDR6023C SSOP16 is a dual USB-C DRP interface USB PD communication chip developed by Ledrui Technology for Bridge devices in the USB type-c standard. Equipped with the power negotiation data packet transmission function, data role switching function, and the function of allowing smart devices to enter ALT mode through VDM negotiation. Specially optimized for the compatibility of USB C interfaces of major mobile phone brands, it is suitable for mobile audio adapter application scenarios. LDR6023C can also be compatible with analog USB type-c earphones for recognition.

Program features:

◇ Supports USB PD 2.0 and is compatible with USB PD 3.0

◇ Supports QC2.0 protocol and is compatible with QC3.0

◇ PDO and REQUEST negotiation between transparent adapter and intelligent device (computer, tablet, mobile phone)

◇ Automatic DR_ SWAP to UFP mode

◇ Provide peripheral reset control function and provide reset signal for peripheral devices

application

◇ USB type-C audio adapter

◇ USB type-c HUB

Summary: Supports forward and backward plug and play, plug and play, driver free installation, and supports type-C interface audio expansion for mobile phones, tablets, laptops, and other devices

Single chip completes communication control related to PD protocol, peripheral simplification supports boosting, improves charging power SSOP16 packaging, small packaging, and convenient for miniaturization design. LDR6023C supports PD and QC protocol adapters for fast charging!

Source: Electronic enthusiasts