That's a pretty cool GaN (gallium nitride) charger. I'm guessing that it uses the InnoSwitch4-CZ control chip. That chip is interesting because instead of havin

That's a pretty cool GaN (gallium nitride) charger. I'm guessing that it uses the InnoSwitch4-CZ control chip. That chip is interesting because instead of having separate chips on the primary (high-voltage) and secondary (low-voltage) sides of the transformer, they use a single chip that contains circuits for both sides. Internally, the two sides are isolated and communicate via an inductive coupling link. The chip looks very weird because it has a super-wide drive pin. https://www.power.com/sites/default/files/documents/InnoSwitch4-CZ-Data-Sheet.pdf https://www.power.com/sites/default/files/documents/InnoSwit...