Here's How Apple's New 40W USB-C Charger Delivers 60W of Power [Teardown]

ChargerLab has torn down Apple's 40W Dynamic Power Adapter, giving us a look at how the company managed to squeeze so much power handling into such a small case. The adapter is nearly the same size as Apple's 20W charger, but it can push up to 60W at peak and hold a steady 40W depending on what's plugged in.



Inside the Case
Apple seals the adapter with snap-fit clips and ultrasonic welding. Open it up and you'll find both halves lined with graphite thermal pads, with foam cushions and plastic brackets bracing the main PCBA. High-temp tape and adhesive keep the larger parts—like the transformer and capacitors—locked down.


At the center of the design is a custom PI control chip (ZN1612F). It rolls the primary controller, high-voltage MOSFET, synchronous rectifier controller, and feedback into one package. Supporting it are a RECTRON RM85N100DF synchronous rectifier, an Infineon CYPDC1185B2-32E protocol controller, and a RECTRON RM80N30DN VBUS MOSFET. Apple also uses a Sumida transformer, a TI TLV9001 op-amp for precision monitoring, and a thermistor that cuts power back when things get hot.



Capacitors and Filtering
Input filtering is handled by two NCC electrolytic capacitors (400V, 47μF each) in parallel, along with dual common-mode chokes and a shielded X2 safety cap. For output, there are three Nichicon solid capacitors (25V, 270μF each), plus Y capacitors on both sides of the circuit. A smaller Lelon capacitor (50V, 22μF) powers the control system. Pads and insulation are placed throughout to keep everything stable and isolated.

Real-World Performance
ChargerLab's testing showed the adapter hitting about 55.9W with a MacBook Air, confirming the 60W fast-charge mode. On an iPhone 16 Pro Max, it managed roughly 27.23W, which Apple says is enough to bring the phone to 50% in around 20 minutes. The adapter supports PD3.0 and DCP protocols with four fixed PDOs: 5V/3A, 9V/3A, 15V/2.67A, and 20V/2A.


Portability
Externally, the adapter weighs about 80 grams and has foldable prongs. It's nearly identical in size to Apple's basic 20W brick and actually smaller than the 35W dual-USB-C charger, making it easy to toss in a bag for travel.

The 40W Dynamic Power Adapter is available now for $39. You can order one here.

Check out the full tear down at the link below...

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