USB-C Adapter Pin Segmentation for Simultaneous Charging and Audio
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Solution Overview
Problem
The existing USB-C interface technology cannot simultaneously support quick charging and the use of a headset due to limitations in signal multiplexing, resulting in slow charging speeds and poor user experience.
Innovation Solution
The design of an adapter system that includes a USB-C plug connected to a terminal device's USB-C interface, a USB socket connected to a charging plug, and a headset socket, which allows for simultaneous transmission of two paths of quick charging signals and two paths of sound channel signals through specific pin configurations, enabling quick charging while using a headset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a USB-C interface is used to support both charging and headset functions, then interface integration is improved, but charging speed deteriorates due to signal multiplexing limitations
Solution Approach 1:
The USB-C interface pins are segmented into different functional groups: communication pins (D+, D-) are dedicated to charging signal transmission, while sound channel pins (ACL, ACR) are dedicated to audio transmission. This segmentation eliminates signal multiplexing conflicts and enables simultaneous quick charging and headset usage without interference between charging and audio signals.
2Adaptability or versatility
If a passive adapter protocol is used for USB-C headset support, then compatibility is improved, but charging power deteriorates to only 5 watts
Solution Approach 1:
The adapter acts as an intermediary device that introduces dedicated communication pins (D+, D-) for charging signals while maintaining sound channel pins (ACL, ACR) for audio transmission. This intermediary structure enables the system to simultaneously support quick charging protocols and analog headset functionality without compromising either charging power or audio compatibility.
Data Source
AI summary
Provided are an adapter, a terminal device and an adapter system. The adapter includes: a universal serial bus type-C (USB-C) plug cooperatively connected to a USB-C interface of the terminal device, a USB socket cooperatively connected to a charging plug, and a headset socket cooperatively connected to a headset plug, where a first communication pin of the USB-C plug is connected to a first communication pin of the USB socket, a second communication pin of the USB-C plug is connected to a second communication pin of the USB socket, a first sound channel pin and a second sound channel pin of the USB-C plug are connected to a right sound channel signal pin and a left sound channel signal pin of the headset socket in one-to-one correspondence.