The iPhone 18 Pro and iPhone 18 Pro Max officially went on sale at midnight today.

Beyond performance and camera upgrades, the iPhone 18 Pro improves charging: it can reach up to 50% in only 15 minutes.

Wired fast charging has also changed. Apple states on its official page that wired fast charging on the iPhone 18 Pro series requires a USB-C cable supporting 60W or more and a USB PD3.1 or later power adapter supporting Adjustable Voltage Supply (AVS).

For power adapter and power bank manufacturers, AVS is becoming a key protocol capability for next-generation USB-C fast-charging products.

AVS is an adjustable voltage output mechanism introduced by USB-IF in the Extended Power Range (EPR) of USB PD 3.1. Its core goal is to solve power loss and heat caused by voltage mismatch during fast charging. Traditional fixed-voltage charging requires a second-step buck conversion inside the device. Each conversion loses energy as heat. Higher charging power means more heat and can trigger thermal throttling.

On the USB-C output side of power banks, NuVolta Technologies (NuVolta) has formed an AVS fast-charging portfolio centered on the NU1520 SoC. For magnetic power banks, NU171X3, a SoC integrating wireless charging and wired protocol capabilities, can pair with the NU681X Buck-Boost Charger power stage to support AVS. Existing AC-DC adapters also support AVS.

NuVolta’s publicly announced AVS-capable chips/solutions include:

• Magnetic power bank: NU171X3 + NU681X

• Power bank USB-C output: NU1520 + NU681X

• AC-DC: NU55XX / NU52XX

The following NuVolta datasheets are for power adapter and power bank development, solution design, and component selection:

NU1520

NU1520 is NuVolta’s self-developed highly integrated fast-charging protocol SoC. It supports Type-C DRP mode and PD 3.1 (including PPS). PPS fine voltage regulation provides the underlying protocol foundation for AVS, enabling NU1520 + NU681X to meet the iPhone 18 Pro series’ AVS dynamic voltage regulation requirements.

NU17103/NU17113/NU17123

NU6812

Key performance metrics:

• Output power: NU1520 + NU6812 with external MOS can scale to 65W

• Peak conversion efficiency: 97.8%; wired discharge efficiency 96% @ 45W

• Temperature rise: only 64.7°C at 8V–15V/45W discharge, nearly 10°C lower than traditional solutions

• Detection accuracy: voltage ±1%, current ±2%, NTC temperature ±2%, meeting strict new national standard requirements

Apple also provides a 40W (up to 60W) dynamic power adapter for the new iPhone.

The iPhone 18 Pro series launch has made AVS an overnight must-answer for the charging industry.

NuVolta’s power management portfolio covers 22.5W–65W wired fast charging and 7.5W–25W wireless fast charging. It supports software platform reuse and series expansion, and can fully support accessories for iPhone 18 Pro PD3.1 AVS fast charging—helping charger and power bank makers accelerate selection and product launch.