Overview
IEC 62680-1-2:2018, Universal serial bus interfaces for data and power – Part 1-2: Common components – USB Power Delivery specification, is an international standard developed by the International Electrotechnical Commission (IEC). This standard defines the architecture and protocols for delivering power over USB interfaces, supporting up to 100W of power. The specification includes comprehensive guidelines for hosts, devices, hubs, chargers, and cable assemblies, enabling efficient and safe management of power alongside data communication in USB systems.
This third edition integrates a series of technical enhancements and clarifications by the USB Implementers Forum (USB-IF), incorporating updates such as improved interoperability, connector behavior, and state operation protocols. The aim is to support flexibility for system manufacturers, peripheral developers, and OEMs while maintaining full backward compatibility with earlier USB technologies.
Key Topics
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USB Power Delivery (PD) Architecture
Defines the system-wide approach for safely delivering higher power levels over USB, including the necessary protocols, behavior patterns for sources and sinks, and compatibility considerations.
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Protocols and Communication
Outlines the communication sequences that enable dynamic power negotiation between USB devices, supporting features like fast role swap (FR_Swap) and power role changes.
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Connector and Cabling
Provides requirements for USB connectors and cable assemblies to ensure safe power delivery, minimize electrical interference, and support interoperability across device classes.
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Power Supply and Battery Management
Details mechanisms for charging, source and sink behavior, dead battery detection, and battery numbering, ensuring robust and flexible charging solutions.
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Backward Compatibility
Maintains the ability for new USB PD-enabled devices to work seamlessly with legacy USB infrastructure, protecting investments in existing technology.
Applications
IEC 62680-1-2:2018 is pivotal for a range of sectors where USB power and data interfaces are essential. Practical applications include:
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Consumer Electronics
Smartphones, tablets, and laptops rely on USB PD for rapid charging and universal compatibility across brands. Manufacturers use this standard to design chargers and cables that cover a broad ecosystem.
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Peripheral Devices
Powering and charging accessories such as external drives, monitors, and docking stations, ensuring adaptable and energy-efficient connectivity.
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Industrial and Medical Equipment
Devices in demanding environments can leverage USB PD’s standardized power delivery for consistent and reliable operation.
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Automotive Systems
In-vehicle charging and data interfaces now frequently employ USB Power Delivery to manage higher power loads safely.
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OEM and System Integration
Facilitate market differentiation, flexibility in power provisioning, and assurance of device interoperability during design and integration.
Related Standards
For complete implementation and interoperability, refer to these related standards:
- IEC 62680-1-1: USB specifications for common connectors and signal transmission
- IEC 62680-1-3: USB Type-C cable and connector specification
- USB Implementers Forum (USB-IF) USB Power Delivery Specification
- IEC 60950 and IEC 62368: Safety requirements for information technology equipment
Staying up to date with IEC 62680-1-2:2018 ensures compliance and compatibility in the design and manufacturing of USB-enabled products. It provides a critical framework for the universal, safe, and reliable delivery of power and data across a diverse ecosystem of electronic devices.
Open preview (PDF)Universal serial bus interfaces for data and power - Part 1-2: Common components - USB Power Delivery specification
