USB PHY Power Regulation Using Integrated 3.3V Supply
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing approaches to integrated Universal Serial Bus (USB) physical layer (PHY) solutions are costly and inefficient, often requiring external 3.3V sources and increased power consumption due to 2.5V Input/Output devices, and struggle to integrate USB 2.0 PHY with USB 3.0 PHY effectively.
Innovation Solution
A regulation apparatus that supplies 3.3V to a USB system using a pass device coupled to a host device, with an integrated USB PHY and regulation circuit that generates a core level signal from a control voltage pin, allowing implementation with 1.8V I/O devices and eliminating the need for external 3.3V sources and additional bus voltage detection circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external 3.3V sources are used to power USB 2.0 PHY circuits, then the USB system can operate reliably, but the device complexity and implementation cost increase
Solution Approach 1:
The patent combines the USB 2.0 PHY power supply function with the existing USB 3.0 3.3V power rail by using a regulator circuit that converts the 3.3V from the USB 3.0 interface to the required voltage for USB 2.0 PHY operation. This eliminates the need for separate external 3.3V sources and integrates multiple power functions into a single unified power management approach.
Solution Approach 2:
The regulator circuit serves multiple functions: it powers the USB 2.0 PHY circuits, provides voltage detection for bus presence, and enables integration with USB 3.0 interfaces. This multi-functional approach reduces the need for separate dedicated components and simplifies the overall system architecture.
2Adaptability or versatility
If 2.5V Input/Output devices are used in USB 2.0 PHY layer, then USB 2.0 compatibility is achieved, but power consumption increases
Solution Approach 1:
The patent changes the voltage parameter from the traditional 2.5V I/O level to 1.8V I/O devices while maintaining USB 2.0 compatibility through the regulator circuit. This parameter change reduces power consumption because lower voltage devices consume less power, while the regulator ensures proper voltage levels are provided to the USB 2.0 PHY circuits that require 2.5V operation.
3Measurement precision
If additional bus voltage detection circuitry is added to integrated USB solutions, then bus voltage detection accuracy improves, but device complexity increases
Solution Approach 1:
The regulator circuit is designed to perform dual functions: it regulates voltage for USB 2.0 PHY operation and simultaneously detects the presence of bus voltage. By monitoring the regulator's operation and control signals, the system can determine whether the USB bus is present and powered, eliminating the need for separate dedicated voltage detection circuitry.
Data Source
AI summary
Described embodiments provide for a regulated voltage supply to a Universal Serial Bus (USB) system. The regulator comprises a pass device that might be coupled to a host device providing a bus voltage. An integrated USB physical layer (PHY) is coupled to the pass device through a control voltage signal pin. A regulation circuit is coupled to the integrated USB PHY, and the regulation circuit supplies about 3.3V from the bus voltage.