USB-C Controller IC Integrating Multiplexer and ESD Protection
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Solution Overview
Problem
Current USB type-C signal interface circuits lack a single-die solution for up-side down connection capabilities, reverse detection, multiplexing, and electrostatic discharge protection, leading to degraded high-speed signaling and increased costs due to the need for external components.
Innovation Solution
A USB-C controller integrated as a single integrated circuit with D+/D− multiplexers, electrostatic discharge protection circuits, and charger detector circuits, enabling flip correction and ESD protection while integrating multiple capabilities on a single chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple external components (multiplexers, ESD protection circuits, charger detector circuits) are used to achieve USB type-C functionality, then the device can support reverse detection and multiplexing, but the high-speed signaling degrades and costs increase
Solution Approach 1:
The patent integrates multiplexer circuits, electrostatic discharge protection circuits, and charger detector circuits into a single USB type-C controller integrated circuit. This consolidation eliminates the need for multiple external components, reduces signal degradation at interconnection points, and lowers overall system cost while maintaining all required USB type-C functionalities including reverse detection and high-speed data signaling
2Reliability
If external components are used for ESD protection and multiplexing, then the circuit can provide protection and connection capabilities, but the overall cost increases
Solution Approach 1:
The ESD protection circuits are integrated directly into the USB type-C controller IC along with the multiplexer and charger detection functionality. This single-chip solution eliminates the need for separate external ESD protection components, reducing component count, simplifying assembly, and lowering manufacturing costs while providing robust electrostatic discharge protection for the USB type-C interface
Solution Approach 2:
The integrated USB type-C controller provides multiple functions including ESD protection, multiplexing for reverse detection, charger detection, and high-speed data signaling all within a single device. This multi-functional approach replaces what would traditionally require multiple separate components, reducing both bill of materials cost and assembly complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides enhanced high-speed signaling, reduced costs, and improved reliability by integrating all necessary functions within a single chip, supporting USB2.0 high-speed data rates and enabling reversible USB-C connections.
Implementation Method 1
an electrostatic discharge (ESD) protection circuit coupled between the D+/D− multiplexer and the second set of terminals
Data Source
AI summary
A device includes a USB-C controller instantiated as a first integrated circuit that includes a first set of host terminals coupled to host controllers and a second set of terminals coupled to sets of D+/D− terminals of a type-C receptacle. A D+/D− multiplexer is to selectively couple the first set of host terminals to the second set of terminals. An electrostatic discharge (ESD) protection circuit is coupled between the D+/D− multiplexer and the second set of terminals. A charger detector circuit is coupled between a positive data system terminal and a negative data system terminal of the first set of terminals, the charger detector circuit to detect whether the second set of terminals is coupled to a USB charger through the type-C receptacle.