MB39A129 39A129 DC/DC Converter Charging Controller IC

MB39A129 (also marked as 39A129) is a DC/DC Converter Charging Controller IC manufactured by Fujitsu Semiconductor Limited. This IC is widely used in laptop motherboards and electronic power-management sections where controlled charging, voltage regulation, and power conversion are required.

The MB39A129 IC is commonly found in Lenovo, HP, Dell, and Acer laptops, as well as in enterprise and portable electronic systems. It plays a key role in managing charging control and DC/DC conversion, helping ensure stable power delivery and battery-related functions. Due to its application, it is frequently required for chip-level laptop motherboard repair and exact replacement.

At OKSpare, the MB39A129 / 39A129 IC is carefully checked and verified by the OKSpare Nehru Place technical team for correct identification and repair usability before supply. This IC is intended for professional technicians, service centers, and electronics repair specialists.

Applications of MB39A129 / 39A129 IC

• Laptop motherboard charging and power sections

• Lenovo, HP, Dell, Acer laptop repairs

• DC/DC converter and charging controller circuits

• Enterprise electronics and power management boards

• Portable and personal electronic devices