Inside the Switch 2 Ac Adapter: Teardown, Vrr Dock Power Delivery, and Real-World Tests
Cracking open the casing of the official power supply unit reveals an internal layout engineered for continuous thermal management. Nintendo abandoned standard silicon diodes in favor of a custom GaN fast charger topology manufactured in partnership with Mitsumi. This Gallium Nitride circuitry allows the power brick to stay roughly the same physical volume as the original 39W adapter while raising output capacity to 65W maximum output.
A strip-down of the internal PCB reveals heavy aluminum heat-sink shielding surrounding the primary transformer and primary switching FETs. The secondary stage features a dedicated synchronous rectification controller paired with solid electrolytic capacitors designed to smooth out rapid transient voltage drops. Crucially, the protocol negotiation chip strictly adheres to standard USB-PD 3.0 specifications rather than proprietary modifications.
Where the original Switch confounded consumers by requesting an unusual 15V/2.6A profile without standard compliance, the Switch 2 adapter establishes clean voltage and amperage limits: 5V at 3.0A (15W), 9V at 3.0A (27W), 15V at 3.0A (45W), and 20V at 3.25A (65W). The inclusion of the 20V rail represents the single biggest architectural shift. It allows the Switch 2 dock to pass clean, high-wattage power to the console while preserving enough current to run integrated USB 3.2 hubs, Gigabit Ethernet controllers, and active display re-timers without voltage sag.
