USB Adaptor Dynamic Pin Configuration for High Current Charging
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Solution Overview
Problem
Current USB adaptors are limited in their ability to supply charging currents greater than 2A due to fixed pin sizes, restricting the charging capacity of electronic devices.
Innovation Solution
The USB adaptor incorporates a voltage conversion circuit, current detection circuit, and switch mechanisms to detect and adjust charging currents, allowing for parallel charging when the current exceeds 2A, thereby enhancing the transmission capacity beyond the conventional 2A limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the USB adaptor uses conventional fixed pin sizes, then the device structure is simple and easy to manufacture, but the charging current is limited to 2A or less
Solution Approach 1:
The patent implements dynamic pin configuration where the USB adaptor can change its pin connection states based on charging requirements. When charging current exceeds 2A, the system dynamically switches to parallel charging mode by controlling switches to connect additional pins (D+ and D-) to the power and ground lines, thereby increasing current capacity while maintaining a relatively simple physical structure.
Solution Approach 2:
The patent makes the USB adaptor multi-functional by enabling it to operate in different charging modes (standard mode and parallel charging mode) using the same physical pins. The adaptor can adaptively switch between conventional 2A charging and high-current parallel charging, making a single device capable of serving multiple charging requirements without needing different hardware configurations.
2Productivity
If the USB adaptor enables parallel charging for currents greater than 2A, then the charging capacity increases, but the device complexity and control mechanisms increase
Solution Approach 1:
The patent incorporates a current detection circuit that continuously monitors the charging current and provides feedback to the control logic. When the detected current exceeds 2A, the system automatically activates parallel charging mode by switching the pin connections. This feedback mechanism enables automatic adaptation to charging requirements without complex manual control, reducing the perceived complexity while maintaining high productivity.
Solution Approach 2:
The USB adaptor performs self-adjustment based on the charging current requirements. The control circuit automatically detects when parallel charging is needed and configures the pin connections accordingly, without requiring external intervention or complex user settings. The system serves itself by autonomously optimizing its configuration based on real-time charging conditions.
Data Source
AI summary
A universal serial bus (USB) adaptor supplies a large charging current to charge a device. The USB adaptor includes a voltage conversion circuit, a USB interface, a current detection circuit, a first switch, a second switch, and a third switch. The USB interface includes a power pin, a first data pin, a second data pin, and a ground pin. The current detection circuit detects a charging current of the device, and converts the charging current into a voltage to compare the charging current with a reference voltage to output a comparison signal. The first switch, the second switch, and the third switch control connection relationships between the power pin and the first data pin, the first data pin and the second data pin, and the second data pin and the ground pin according to the comparison signal, respectively. A USB cable is also provided.