Switchable Power Adapter Voltage Control via ASIC Handshake
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power adapters for portable information handling systems lack flexibility and portability due to complex and costly designs, particularly in their ability to adjust output voltage levels based on the specific requirements of connected devices.
Innovation Solution
A power adapter with switchable output voltage control, utilizing an application-specific integrated circuit (ASIC) to detect a handshake signal from the information handling system and adjust the output voltage through the USB interface, reducing complexity and cost while maintaining compatibility with various devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing power adapters use complex designs to adjust output voltage levels, then voltage adaptability is improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the output voltage parameter from fixed to switchable between multiple levels (5V, 12V, 20V) based on device requirements. This is achieved through a control circuit that receives identification signals from connected devices and automatically switches the output voltage to the appropriate level, resolving the contradiction between voltage adaptability and design complexity by using a standardized switching mechanism rather than complex individual regulation circuits for each voltage level
Solution Approach 2:
The power adapter is designed with multi-functionality to support multiple voltage outputs (5V, 12V, 20V) and different connection types (USB Type-A, Type-C, Micro USB) through a single unified device. The control circuit universally handles different device identification signals and switches accordingly, eliminating the need for multiple dedicated power adapters for different voltage requirements
2Adaptability or versatility
If existing power adapters use complex designs to adjust output voltage levels, then voltage adaptability is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements cost-effective voltage switching by changing the output voltage parameter through a simple control circuit that responds to device identification signals. Rather than using expensive individual voltage regulation modules for each output level, the system uses a single switching mechanism controlled by microcontroller logic, significantly reducing component count and manufacturing cost while maintaining full voltage adaptability
Solution Approach 2:
The patent uses a standardized control approach where the control circuit copies the identification signal received from various devices and matches it against predefined voltage requirements. This copying and matching mechanism allows the same control logic to handle different device types and voltage requirements without requiring custom circuitry for each device, reducing manufacturing complexity and cost
3Ease of operation
If power adapters use standard USB connectors for interchangeability, then ease of operation is improved, but control precision for voltage adjustment deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the control circuit continuously monitors the identification signal from connected devices through the USB interface and adjusts the output voltage accordingly. The system receives feedback about device type and power requirements, then precisely switches to the appropriate voltage level, maintaining both ease of operation with standard connectors and precise voltage control through active monitoring and switching
Solution Approach 2:
The control circuit performs preliminary action by detecting and analyzing the identification signal from the connected device before actually switching the output voltage. This preliminary detection phase allows the system to determine the required voltage level in advance, ensuring precise voltage control is established before power delivery begins, while maintaining simple USB connector interchangeability
Data Source
AI summary
An example switchable power adapter may include power circuitry and an interface coupled to the power circuitry. An application-specific integrated circuit (ASIC) may be coupled to the power circuitry and the interface. The ASIC may be configured to receive a signal transmitted by an information handling system through the interface; determine whether a delay period within the signal satisfies a delay period condition; and cause the power circuitry to alter an output voltage level provided to the information handling system through the interface. The interface may comprise at least a Universal Serial Bus (USB) receptacle.