Power Supply Circuit Switching Control for USB ID Data
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Solution Overview
Problem
Conventional smartphones and tablet PCs interrupt power supply from the internal battery when external power is received, lacking a method to seamlessly switch between external and internal power sources, especially with the transition from 30-pin connectors to USB connectors.
Innovation Solution
A power supply circuit with a connector for external power and ID data, featuring first and second switches controlled by a controller to manage power flow based on ID data, allowing selective disconnection or connection of the battery to the system depending on the type of external power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external power is received via USB connector, then power supply to system is enabled, but battery power supply must be interrupted requiring additional switching control
Solution Approach 1:
The patent introduces a connector as an intermediary component between the external power source and the system. This connector includes multiple pins that can receive both power signals and ID data signals, mediating the interaction between different power sources and the system to enable adaptive power management without requiring complex switching control
2Measurement precision
If ID data reception is enabled via connector, then external power source identification is improved, but connector complexity increases
Solution Approach 1:
The patent makes the connector multi-functional by enabling it to receive both power signals and ID data signals through the same physical interface. The connector pins are designed to handle multiple signal types, eliminating the need for separate identification components and reducing overall device complexity while improving power source identification accuracy
Data Source
AI summary
A power supply circuit in an electronic device is provided. The power supply circuit includes a connector configured to receive external power and IDentifier (ID) data, a first switch disposed between the connector and a system of the electronic device, a second switch connected to the system, and a controller configured to control ON and OFF states of each of the first and second switches based on the ID data.