CD3215B03 USB-C Port Controller IC for MacBook 12 / Pro 13 (2016-2017)

A 12-inch MacBook that ignores every USB-C charger, or a 2016 MacBook Pro with one dead port while the others work, often leads to the USB-C port controller. The CD3215B03 is a 96-pin BGA port controller listed for the MacBook 12 Retina (A1534) and MacBook Pro Retina 13 (A1708) from early 2016, late 2016 and mid 2017.

Each USB-C port on these machines has its own controller, so a fault can affect just one side. The listing doesn't give board positions; your board view will show which controller serves which port.

Port and power faults to trace

• A USB-C port that doesn't charge or carry data.

• Charger stuck at 5 V instead of full power.

• A short on the port's supply after liquid.

• Damage after a faulty charger or cable.

Diagnosis

A USB-C power meter tells you a lot here. If the machine stays at 5 V and never negotiates a higher voltage, the controller or its supply rails are suspect. Check the port itself for bent pins or debris first, then measure the controller's rails against the schematic for your board number.

Use bottom heat and a nozzle that covers the whole package, since these boards are thin and spread heat quickly. Reball or fit the new chip on fresh flux, then test charging and data on every port before closing the case. Run the machine on the charger for a while afterward and confirm it holds full power.