Type-C SBU Pin Quick Charging and Audio Transmission
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Solution Overview
Problem
Existing electronic devices cannot perform quick charging when using an accessory with both charging and audio transmission functions due to the conflict between using the CC pin for quick charging protocol communication and audio signal transmission.
Innovation Solution
The electronic device and accessory utilize the SBU pins of the Type-C female socket to perform quick charging protocol communication, allowing the CC pin to be used for determining the accessory's connection state and enabling simultaneous quick charging and audio transmission by switching the connection mode between the quick charging controller and processor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the CC pin is used for quick charging protocol communication, then quick charging function is enabled, but audio signal transmission function cannot be performed simultaneously
Solution Approach 1:
The patent segments the pin functions by separating quick charging communication (using SBU pins) from audio signal transmission (using DP/DM pins), allowing both functions to operate independently and simultaneously without resource conflicts
Solution Approach 2:
The Type-C interface is designed to support multiple functions through different pin assignments: SBU pins handle quick charging protocol communication while DP/DM pins handle audio transmission, enabling the single interface to serve both purposes concurrently
2Device complexity
If the Type-C port is used for both charging and audio signal transmission, then the number of external ports is reduced, but the charging and audio functions cannot be used at the same time
Solution Approach 1:
The patent implements dynamic pin assignment where the SBU pins can be dynamically switched between audio signal transmission mode and quick charging communication mode based on the connected accessory type, enabling flexible and simultaneous operation of both functions through a single Type-C port
3Adaptability or versatility
If an accessory connecting Type-C male connector to audio port is used, then audio signal transmission is enabled, but quick charging protocol communication cannot be performed
Solution Approach 1:
The patent introduces an intermediary switching mechanism that routes SBU pin signals appropriately: when an audio accessory is detected, the switches redirect SBU pin connections to enable audio functionality while maintaining the capability for quick charging through alternative pin assignments or communication protocols
Data Source
AI summary
The present invention provides an electronic device and an accessory with quick charging and audio transmission functions. The electronic device can be respectively connected to a charger and an audio connector through the accessory. The electronic device includes a quick charging controller and a device Type-C female socket. The quick charging controller is used for performing quick charging protocol communication by utilizing the SBU pins of the device Type-C female socket and the D+ pin and the D− pin of a charger connected to the accessory when the accessory is connected to the device Type-C female socket and the charger is connected to the accessory. The present invention breaks through the usual thought of using the CC pin to perform quick charging protocol communication in the existing quick charging mode. Further, when the accessory with the audio transmission function is used, the quick charging can also be performed.