USB-A to USB-C Cable Circuit for PD Charging Compatibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing data cables with a type-A interface cannot support Power Delivery (PD) protocol charging, limiting their compatibility with devices that require quick charging.
Innovation Solution
A data cable with both type-A and type-C interfaces, equipped with a circuit identification module that includes a switch circuit, filtering circuit, voltage regulator circuit, and comparator circuit, allowing the CC pin of the type-A interface to be connected to the CC pin of the type-C interface for PD protocol support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a CC pin is added to the type-A interface, then PD protocol support is enabled, but cable complexity increases
Solution Approach 1:
A switching circuit acts as an intermediary between the type-A interface and type-C interface. This mediator selectively connects the CC pin of the type-A interface to the CC pin of the type-C interface when PD protocol is detected, or connects traditional D+/D- pins when non-PD protocol is used. The intermediary manages the complexity by providing a unified control mechanism that simplifies the overall system architecture despite the added components.
Data Source
AI summary
A data cable and a charging device are provided. The data cable includes a type-A interface and a type-C interface. The type-A interface and the type-C interface each includes a VBUS pin, a CC pin, a D+ pin, a D− pin, and a GND pin. A circuit identification module is disposed in the data cable, and the circuit identification module includes a switch circuit, a filtering circuit, a voltage regulator circuit, and a comparator circuit. The switch circuit is connected to a CC pin of the type-C interface, an output end of the voltage regulator circuit, a CC pin of the type-A interface, and an output end of the comparator circuit. Under the control of the comparator circuit, the switch circuit connects the CC pin of the type-C interface to the CC pin of the type-A interface or the output end of the voltage regulator circuit.