CD3217B12 Charging IC

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The CD3217B12 is a Texas Instruments USB Type-C Port and Power Delivery controller, widely known on Apple logic boards by its silkscreen marking U3100 (or U3200 on dual-port boards ). Built on TI's TPS6598x platform as a custom Apple variant from the ACE2 controller family, this BGA chip manages USB-C power negotiation, port switching, and charging voltage handshaking on MacBook Pro, MacBook Air, iPad Pro, and iPad Air boards. Technicians reach for this IC when a board charges only at 5V instead of the expected 9V, 15V, or 20V, or when one USB-C port stops accepting power entirely. Reballing or replacing the CD3217B12 restores proper PD negotiation on the affected port. Show more