The Industry’s First Dual-Mode Battery Charge Ics BD99954GW/MWV

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.


Distribution Inventory

Facilitates configuration of the industry’s first simultaneous dual-mode charging system

To support the 2 predominant charging methods for the latest portable devices, ROHM developed the industry’s first 2-input charging system. A built-in charging adapter discrimination function enables automatic switching between modes without an MCU. This eliminates the need to mount and adjust external peripheral components such as transistors and resistors typically necessary for each charging system (for charge path switching and backflow prevention), significantly reducing both mounting area and design load.

System Comparison

Supports the latest USBPD standards through boost-buck control

Step-up/down control makes it possible to generate the charging voltages necessary for USBPD operation (5V to 20V). For example, when charging a 2-cell battery (~8.4V), boost-buck control enables step-down operation from 20V to 8.4V as well as step-up from 5V to 8.4V.
In addition, compliance with the popular USB BC1.2 and USBPD standards provides support for both conventional USB and the newest USB PD charging protocols.


Part No. No. of Inputs Supply Voltage Range Charge Voltage Range Switching Frequency Operating Temp. Range Package
BD99954GW 2ch 3.8~ 25V 3.07 ~ 19.2V 600 ~ 1200KHz -30 ~ 85℃ UCSP55M3C
2.6mm x 3.0mm x 0.62mm
BD99954MWV UQFN040V5050
5.0mm x 5.0mm x 1.0mm


■ Notebook PCs ■ Tablets PCs ■ Smartphones
■ Portable Batteries ■ Wireless Audio 
100W Portable Battery-Equipped Devices