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The Apple ACE2 controllers are the second generation of USB-C PD controllers. They first appeared in 2019 with the release of the A2141 (Macbook Pro 16") and the A2159 (Macbook Pro 13" 2 Thuderbolt ports). They replace the previous generation ACE1 controllers (CD3215), and have various declinations: CD3217B12, CD3217B13 and CD3218B12, which all have the same working principles.