MB39A40A 39A40A DC/DC Converter IC

MB39A40A (also marked as 39A40A) is a DC/DC converter and charging controller IC manufactured by Fujitsu Semiconductor Limited. This IC is widely used in laptop motherboard power and charging sections where stable voltage regulation and controlled charging operation are required.

The MB39A40A IC is commonly found in Lenovo, HP, Dell, and Acer laptops, as well as in enterprise and portable electronic systems. It supports efficient DC/DC conversion and charging control, making it suitable for battery-related power circuits. Due to its role, this IC is mainly required for chip-level laptop motherboard repair and exact-match replacement.

At OKSpare, the MB39A40A / 39A40A IC is carefully checked by the OKSpare Nehru Place technical team to ensure correct part identification and repair usability before supply. This IC is intended for professional technicians and service centers.

Applications of MB39A40A / 39A40A IC

• Laptop motherboard charging and power circuits

• Lenovo, HP, Dell, Acer laptop repair

• DC/DC converter and charging controller sections

• Enterprise electronics and power boards

• Portable and personal electronic devices

Technical Description – MB39A40A / 39A40A IC

• DC/DC converter and battery charging controller IC

• Designed for controlled charging and voltage regulation

• Used in laptop and enterprise power-management circuits

• Provides stable and reliable long-term operation

• Ideal for chip-level laptop and electronics repair