Dual-input boost-buck charging ICs support USB Power Delivery spec

A growing number of portable devices, including notebook PCs, are adopting the USB Type-C PD standard that can charge up to 100W, providing a common charging platform. At the same time wireless charging is gaining traction, increasing the demand to support both charging methods. However, in order to deliver a wide power supply range required by USBPD, a boost function must be added to the system to charge 2-cell (~8.4V) batteries from conventional 5V chargers. Also, enabling two different charging methods to operate at the same time requires mounting charge ICs along with peripheral components as well as an MCU to control charge switching, presenting a significant barrier to introduction.

In response, combining its USBPD IC with proprietary semiconductor technologies allowed ROHM to meet these needs and develop dual-input charging ICs that support both USBPD and wireless protocols in a single package.

ROHM’s  dual-input boost-buck charging ICs that support 1 to 4 battery cells for notebook PCs, smartphones, and power banks utilize the latest charging technologies such as wireless and USB Power Delivery (USBPD).

The BD99954GW/MUV generates a charging voltage from 3.07 to 19.2V for 1 to 4 cells through boost-buck control for USBPD. In addition, the industry’s first dual-input charging system automatically switches charging operation without an MCU using an original built-in charging adapter function. And support is provided for both USBPD and USB BC 1.2. This facilitates configuration of dual-mode systems capable of simultaneous charging via USBPD, wirelessly, or from an AC adapter.