Thursday, 28 February 2019

Am I understanding this circuit right?


This is from an iPhone 6. I'm having a hard time understanding how q1701 controls the "handshake" to Tristar_pin to allow charging. (Diagram says "pin for handshake" next to C1704 at top right.)


I don't see anything controlling the gate of q1701 either. Am I right to assume current flow that I've traced in red?


enter image description here




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