The CD3217B13 is a specialized integrated circuit used in Apple devices such as the MacBook Air 13 (M2 processor), MacBook Pro 14, and MacBook Pro 16, to control USB-C and Thunderbolt 3/4 ports. Purpose and Functions: It is responsible for processing USB-C Power Delivery (PD) signals, ensuring charging and data transfer. It manages the switching of USB 3.1, DisplayPort, and Thunderbolt lines, ensuring proper signal routing. It performs protective functions, such as voltage and current control, preventing overheating and short circuits. Where is the CD3217B13 used? Devices where it is found: MacBook Pro (2018 and newer) MacBook Air (2018 and newer) Mac mini with USB-C ports iMac with USB-C/Thunderbolt 3 Some iPad Pro models with USB-C This chip is an important component of modern MacBooks, allowing the connection of peripherals, charging the device, and high-speed data transfer. *Depending on the supply, the appearance and configuration may differ from the images on the website. The appearance does not affect the quality and characteristics of the product.