Type-A Charger Circuit for PD Signaling Over Data Pins
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Solution Overview
Problem
Data cables with a Type-A port do not support Power Delivery (PD) protocol charging, limiting their compatibility with modern charging standards.
Innovation Solution
Incorporating a PD transceiving module in the charger and data cable to enable conversion between PD signals and common mode signals, allowing Type-A ports to support PD charging by reusing the data pin for PD signal transmission without interfering with differential mode signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a Type-A port data cable is used for charging, then the charging device can perform non-PD charging, but the data cable cannot support PD protocol charging
Solution Approach 1:
The data pin in the Type-A port is made to serve dual functions: transmitting differential mode signals for non-PD charging and transmitting common mode signals for PD charging. The PD transceiving module enables the data pin to be reused for PD signal transmission, allowing a single cable structure to support both PD and non-PD charging protocols without requiring separate dedicated pins or cables.
2Adaptability or versatility
If the data pin is reused for PD signal transmission, then PD charging is enabled, but signal interference may occur with differential mode signals
Solution Approach 1:
The PD transceiving module acts as an intermediary device that converts PD signals into common mode signals suitable for transmission through the data pin. This conversion process ensures that PD signals can be transmitted without interfering with the differential mode signal transmission capability, as the common mode signaling uses a different electrical reference that is compatible with the shared data pin infrastructure.
3Adaptability or versatility
If a PD transceiving module is added to enable PD charging, then PD protocol support is achieved, but the device structure becomes more complex
Solution Approach 1:
The PD transceiving module is integrated into the existing charger architecture, merging PD protocol handling capabilities with the existing charging control functionality. This integration approach allows the PD transceiving module to share resources with other charging components, reducing overall system complexity compared to implementing PD support as a completely separate subsystem.
Data Source
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AI summary
This application discloses a charger, a data cable, and a charging device. The charger includes a first Type-A port, a charging module, and a first PD transceiving module. The first Type-A port includes a data pin, a first terminal of the charging module is connected to the data pin, a second terminal of the charging module is connected to a first terminal of the first PD transceiving module, and a second terminal of the first PD transceiving module is connected to the data pin. In a case that the charger is connected to a matched first data cable, the first PD transceiving module is in an operating state, the charging module performs non-PD charging on a to-be-charged device based on a differential mode signal transmitted through the data pin, or the charging module performs PD charging on the to-be-charged device based on a common mode signal processed by the first PD transceiving module and transmitted through the data pin. The first data cable transmits a first signal transmitted through the data pin, to the charger when connected to the charger.