Type-A Data Cable with Switchable CC Circuit for PD Charging
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Solution Overview
Problem
Conventional data lines with a Type-A interface do not support Power Delivery (PD) protocol charging, limiting their compatibility with devices that require fast charging via the PD communication protocol.
Innovation Solution
A data line with a Type-A interface is enhanced by incorporating a circuit identification module comprising a pull-up resistor, switch circuit, filter circuit, and comparator circuit, allowing the CC pin to connect or disconnect with a Type-C interface based on CC signal presence, enabling PD fast charging when supported by the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a Type-A interface data line is used, then compatibility with conventional charging devices is maintained, but Power Delivery (PD) protocol charging is not supported
Solution Approach 1:
The data line is designed with a Type-A interface that can support multiple charging protocols (PD protocol and DP/DM protocol) through a switchable configuration channel circuit. The circuit can dynamically switch between connecting the CC pin to the VBUS pin (for PD protocol) or to the D+ pin (for DP/DM protocol), making the single data line universally compatible with different charging standards without requiring separate cables for each protocol.
Data Source
AI summary
A data line and a charging device are provided. The data line includes a Type-A interface, a first interface, a wire, and a circuit identification module. The Type-A interface is correspondingly connected to a VBUS pin, a D+ pin, a D− pin, and a GND pin in the first interface. The circuit identification module includes a pull-up resistor, a switch circuit, a filter circuit, and a comparator circuit. The comparator circuit controls the first end and the second end or the third end of the switch circuit to be connected.