ROHM Unveils NFC-Based Wireless Charging Chipset for Ultra-Compact Wearables
Event summary
- ROHM launched the ML767x chipset, an NFC-compatible wireless power solution for compact wearables like smart rings and bands.
- The ML7670 receiver IC achieves 45% power transfer efficiency in a 2.28 x 2.56 x 0.48mm form factor, with embedded firmware eliminating the need for a host MCU.
- The chipset is already in mass production and has been adopted in SOXAI RING 2, launched on December 10, 2025.
- The solution addresses limitations of Qi wireless charging in extremely small devices by leveraging NFC's 13.56MHz band for antenna miniaturization.
The big picture
ROHM's new chipset targets the rapidly growing smart ring market, where traditional wired charging is impractical and Qi wireless charging faces implementation challenges due to size constraints. By leveraging NFC technology, ROHM is positioning itself as a key player in the next generation of ultra-compact wearable devices. The solution's compliance with NFC Forum standards could accelerate adoption across the broader wireless power ecosystem.
What we're watching
- Market Adoption
- How quickly the ML767x chipset will be adopted by other wearable manufacturers beyond SOXAI.
- Competitive Response
- Whether competitors will accelerate development of NFC-based wireless charging solutions to match ROHM's offering.
- Ecosystem Growth
- The pace at which the NFC wireless power ecosystem expands as more devices adopt the WLC 2.0 standard.
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