NFC Wireless Charging Explained

nfc wireless charging explained

NFC WIRELESS CHARGING EXPLAINED

A New Standard for Wireless Power 

Operating at 13.56MHz, Near-Field Communication (NFC) began as a data protocol. Today, the NFC Forum’s Wireless Charging Standard (WLC) allows product developers to have high theoretical data speeds, maintain loose coupling and deliver small amounts of power.

NFC WLC is a technology that’s appropriate for small, wearable devices. This technology has already been successfully implemented in products like smart glasses, fitness trackers & styluses.

This technology is a great option for products with certain challenges, including:

METHOD:
INDUCTIVE RESONANT
POWER:
<3w
OPERATING FREQ:
13.56MHz

Small Form Factors

  • High frequency allows for smaller coil sizes

  • Employ metallic interior to improve performance

  • Maximize inner coil diameters to accommodate sensors

High Data Needs

  • Increase speed of data transfer

  • Transfer more meaningful data

  • Protect integrity of transferred data at elevated power levels

  • Large component ecosystem

Spatial Freedom

  • Operating frequency of 13.56MHz

  • Decrease need for advanced user dexterity and placement precision

Higher Power

  • Received power levels up to 3W

NFC Wireless Charging Advancements

NFC Forum

The NFC Forum WLC standard currently specifies wireless power transmitted at 1W and data throughput at 106 Kbps.

NuCurrent + NXP

NuCurrent has advanced this new technology by:

  • Increasing the NFC WLC Specification to 5W received

  • Increasing data throughput to 848 Kbps under high power

  • Utilizing our patented MLMT-magnetics to achieve smaller footprints, higher efficiencies and lower thermals

  • Enabling over-air-communication without protocols

10 Things You Need to Know about NFC Wireless Charging

NuCurrent’s wireless power experts cover common NFC Charging questions, including:

  • How does it differ from Qi charging?

  • What products currently use it?

  • What challenges does it solve?

  • What does an NFC Charging system look like?

  • How do power and data work together in this type of system?

Combining Power + Data

Designing a NFC WLC system is all about transferring power efficiently while maintaining communications fidelity. In other words, creating a balance between low power loss and high data integrity.

NFC WLC systems rely on techniques from both NFC data and wireless power to ensure the most efficient power transfer while maintaining the necessary bandwidth to support high speeds of data transfer.

Overview: Qi vs. NFC

Qi and NFC WLC both have strengths and limitations.

The chart to the right explores design considerations for product developers.

When exploring your options, consider criteria such as form factor, user experience, power received and data capabilities.

System Design Similarities

A NFC WLC system is similar to a traditional wireless power system, with the addition of NFC control. NFC blocks provide the primary function of transferring data, while the remaining foundational blocks function similarly to a Qi-based system. The main difference: As data speeds are increased, power levels must be considered as it will affect the integrity of the data.

The chart to the right provides an overview on the structure of a NFC WLC system.

Where to begin? Start here.

NFC FORUM

Get started with understanding the global specification by going directly to the consortium that created it.

NXP SEMICONDUCTORS

NXP Semiconductors, an NFC Forum co-founder, supplies a majority of the market with NFC-enabled hardware. Browse their hardware options

NUEVA NFC DEVELOPMENT PLATFORM

As an NXP Gold Partner, NuCurrent is advancing the standard making higher power levels and data rates possible.

NFC FORUM

Get started with understanding the global specification by going directly to the consortium that created it.

NXP SEMICONDUCTORS

NXP, an NFC Forum co-founder, supplies a market majority with NFC-enabled hardware. Browse their hardware options.

NXP SEMICONDUCTORS

As an NXP Gold Partner, NuCurrent is advancing the standard making higher power levels and data rates possible.

NFC FORUM

LEARN MORE

NXP SEMI-CONDUCTORS

LEARN MORE

NUEVA NFC DEVELOPMENT PLATFORM

LEARN MORE
LEARN MORE ABOUT OUR NFC TECHNOLOGY →

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