Features of ML7660 / ML7661

3 features

Feature.1  
13.56MHz wireless charging, capable of supplying a battery with a capacity of 200mAh (at 1C* charge)

By increasing the power supply capacity to 1W (five times that of the conventional product), it is possible to charge wristband blood pressure monitors with large battery capacity, and to charge smartwatches and hearing aids at high speed

Comparison of "charging time to 90% battery capacity" between USB charging and 13.56MHz wireless 1C* charging

Within a battery capacity of 200mAh.
Charging time is almost the same between wireless charging and USB cable charging.

Using the 13.56MHz frequency band, the antenna size can be reduced by 83% compared to Qi (Qi)* (110kHz to 205kHz), a common feeding method used in smartphones.
Or, the antenna size can be reduced by 36% compared to discrete component configurations (several hundred kHz), allowing it to be mounted on smaller devices.

Term Description

• 1C :
  Current to fully charge a rechargeable battery in one hour
• Qi:
  An international standard for wireless charging developed by the Wireless Power Consortium. It is used in wireless charging for smartphones.

Feature.2  
Microcomputer-less design contributes to miniaturization by reducing the number of parts

Power supply control can be achieved without a microcontroller by simply supplying power.
This not only eliminates the need for software development for the microcontroller, but also contributes to miniaturization by reducing the mounting space for the microcontroller.
For the addition of a new SPI interface, it enables microcontroller-less control of digital sensors and other devices with SPI interfaces.

Feature.3  
Control and monitor rotating equipment by using both power supply and high-speed data communication.

Communication with sensors mounted on the rotating part and power supply are now possible, which was not possible with the conventional wired system.