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ROHM Develops Wireless Charging Chipsets 'ML7630' and 'ML7631'
Power transmission in the 13.56MHz band for hearable devices
Wireless charging enables device miniaturization and improved charging convenience.
Rohm Group's LAPIS Semiconductor has developed the ML7630 (receiver/terminal side) and ML7631 (transmitter/charger side), wireless charging control chipsets for wearable devices.
This wireless charging control LSI is ideal for wireless charging of hearable devices, such as Bluetooth® headsets, which are limited by mounting space. To support hearable devices, power and transmission are performed in the high-frequency 13.56MHz band, miniaturizing the antenna and integrating the necessary functions for transmission and reception onto the chip, thereby reducing SoC mounting space. By enabling previously difficult wireless charging, this chip contributes not only to device miniaturization but also to improved charging convenience, waterproofing, and dust resistance.

The ML7630 generates power from the antenna's magnetic field, enabling operation even when the battery is depleted. Furthermore, it achieves wireless charging with up to 200 mW output in a compact 2.6 mm x 2.6 mm WL-CSP package. It also features NFC Forum Type 3 Tag v1.0 functionality, supporting Bluetooth® pairing via NFC touch.
Furthermore, the ML7631 can operate on 5V from USB power sources, such as auxiliary batteries, contributing to the mobility of chargers. This chipset is currently sampling, with mass production scheduled to begin in May 2018.
Wireless charging enables device miniaturization and improved charging convenience.
Rohm Group's LAPIS Semiconductor has developed the ML7630 (receiver/terminal side) and ML7631 (transmitter/charger side), wireless charging control chipsets for wearable devices.
This wireless charging control LSI is ideal for wireless charging of hearable devices, such as Bluetooth® headsets, which are limited by mounting space. To support hearable devices, power and transmission are performed in the high-frequency 13.56MHz band, miniaturizing the antenna and integrating the necessary functions for transmission and reception onto the chip, thereby reducing SoC mounting space. By enabling previously difficult wireless charging, this chip contributes not only to device miniaturization but also to improved charging convenience, waterproofing, and dust resistance.
The ML7630 generates power from the antenna's magnetic field, enabling operation even when the battery is depleted. Furthermore, it achieves wireless charging with up to 200 mW output in a compact 2.6 mm x 2.6 mm WL-CSP package. It also features NFC Forum Type 3 Tag v1.0 functionality, supporting Bluetooth® pairing via NFC touch.
Furthermore, the ML7631 can operate on 5V from USB power sources, such as auxiliary batteries, contributing to the mobility of chargers. This chipset is currently sampling, with mass production scheduled to begin in May 2018.
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