Introduction
Apple’s iPhone 17 series, launched in 2025, officially supports the variable voltage charging mode based on the new USB-PD 3.2 specification, namely USB PD 3.2 SPR AVS, and has released an official40W dynamic power adapter (up to 60W),
to achieve the official claim of “approximately 20 minutes to charge to 50%” fast charging experience. To reach this speed, a charger that supports AVS is required, and Apple’s 40W dynamic adapter is currently one of the first compatible products, which has quickly driven the market for third-party chargers supporting AVS to follow suit.
It should be noted that AVS is one of the key features promoted in the USB-PD version,and Apple’s 40W fast charging supports the PD3.2 SPR AVS protocol, primarily introducing the adjustable voltage (SPR AVS) mechanism for the first time within the standard power range (27W–100W), allowing devices to accurately match various terminal charging needs between 9V and 20V with a minimum step of 100mV, thereby effectively improving energy conversion efficiency and reducing heat loss.
Here, Power-z engineers have created a table for interpretation. Therefore,if you purchase a third-party charger for fast charging the iPhone 17, the charger must also support AVS technology, especially the PD3.2 SPR AVS protocol, to enjoy the super experience of charging to 50% in 20 minutes.
As one of the representative manufacturers in the field of power and battery management in China,Nanxin Technology has long focused on the research and mass production of power, charging protocols, and battery management chips. After the iPhone 17 announced support for AVS,they responded immediately to the technical iteration,reviewed and verified multiple fast charging controllers that support AVS, and organized matching chip solutions for chargers and power banks, helping terminal manufacturers achieve compatibility withnew models like the iPhone 17 and the claimed charging performance more quickly.
Nanxin Technology AVS Fast Charging Chips
Nanxin Technology has launched multiple fast charging protocol chips that support AVS, which have been summarized in the table above to give everyone a better understanding. Next, the charging head network will also provide a detailed introduction to these chips.
Charger
Nanxin SC215TA
SC215TA is a highly integrated PD fast charging controller chip that complies with the latest USB-C and PD 3.1 standards, supporting various proprietary high-voltage fast charging protocols. This chip integrates numerous functional modules, including USB PD baseband PHY, USB-C detection, DPDM PHY, and more, along with a 32-bit high-performance MCU, 24kByte OTP, and 2kByte RAM, maximizing the reduction of external component usage.
This chip features multiple protection mechanisms, including over-voltage, under-voltage, over-current, short-circuit, and over-temperature protection, supports a wide operating voltage range of 3.3V to 22V, and can withstand a maximum voltage of 26V. It integrates programmable feedback compensation, a 10-bit high-performance ADC, dual 10-bit DACs, and NMOS gate drivers, packaged in a QFN16 package, suitable for wall-mounted fast charging adapters, travel chargers, and other fields.
Nanxin SC2152A
SC2152A is a high-performance PD fast charging controller chip that supports mainstream high-voltage fast charging protocols, including BC1.2, UFCS, and other standards and proprietary protocols. This chip integrates core modules such as USB PD baseband PHY, USB-C detection, and DPDM protocol PHY, along with a 32-bit high-performance MCU, 32KByte OTP + 3KByte SRAM, and components like an 11-bit VDAC, 10-bit IDAC, and programmable loop compensation, providing a cost-effective solution for applications.
SC2152A supports a wide operating voltage range of 3.3V to 22V, can withstand a maximum voltage of 26V, integrates a no-capacitor LDO and precise adjustment module, and achieves precise control with a 10-bit ADC and current sense amplifier. It also features comprehensive protection mechanisms, including over-voltage, under-voltage, over-current, and over-temperature protection, packaged in a QFN16 package, meeting diverse power requirements.
Nanxin SC2159A
SC2159A is a high-performance fast charging controller compatible with mainstream high-voltage fast charging protocols, supporting PD 3.2 applications via the CC pin, and supporting BC1.2, UFCS, and various proprietary protocols through the DPDM pin. This chip integrates core modules such as USB PD baseband PHY, Type-C detection, and DPDM protocol PHY, paired with a 32-bit high-performance MCU, 64KByte MTP & ROM + 2.5KByte SRAM, providing a cost-effective solution for applications.
This chip’s VBUS operating voltage covers 3.0V to 22V (withstand 28V), integrates an 11-bit VDAC and a 10-bit IDAC, and supports transformer node voltage detection and I²C/OPTO power IC control interfaces. Additionally, this chip has built-in comprehensive protection mechanisms for over-voltage, under-voltage, and over-current, packaged in a QFN24 package, ensuring stable and reliable operation in diverse fast charging scenarios.
Nanxin SC2167A
SC2167 is a cost-effective integrated control chip aimed at multi-port chargers, car chargers, power banks, and electric tools, supporting Type-C PD3.2, 28V EPR, DPDM, BC1.2, and UFCS fast charging standards, meeting multi-port fast charging needs. It also integrates 11 ADC channels, N-MOS, and three port insertion detection modules, with multiple protection mechanisms such as OVP, OCP, SCP, UVP, and OTP, adapting to the safety control needs of diverse power supply scenarios.
This chip is also equipped with a 32-bit ARM Cortex-M0 core (12MHz CPU), along with 64KB flash and 8KB SRAM, supporting IIC, UART TX/RX, SWD interfaces, and 48MHz PWM output, efficiently achieving device control and data interaction while ensuring product power density and significantly saving PCB space, enhancing the design flexibility of terminal products.
Nanxin SC3107C
SC3107C is a fully integrated chip launched by Nanxin Technology. This chip uses Nanxin’s self-developed fully integrated high-voltage isolation package, which includes a primary-side controller, GaN power transistor, high-speed isolated digital communication module SC-PQLINK, synchronous rectification controller, and protocol chip. It replaces five chips in traditional solutions with a single chip.
This chip has a high level of integration, significantly reducing the number of external components required for chargers, with advantages of short development cycles and high product cost-effectiveness. The built-in high-speed digital isolation communication module SC-PQLINK not only provides higher system reliability than optocouplers but also enables secondary control. The chip utilizes secondary control advantages to achieve primary-side soft switching and active synchronous rectification, improving overall power efficiency and reducing heat dissipation requirements.
At the same time, SC3107C integrates protocol functions, supporting UFCS fusion fast charging, PD 3.2 fast charging, and various mainstream proprietary custom protocols. The chip also integrates soft start, over-voltage protection, per-cycle current limiting, under-voltage protection, output over-voltage protection, output over-current protection, and output short-circuit protection, ensuring the stability and safety of fast charging power supplies.
Application Cases:
1.Disassembly Report: Ugreen 65W GaN Fast Charging Charger
2.Disassembly Report: Tulas 35W Mini Block PRO Charger
3.Disassembly Report: Honor 100W USB-C GaN Fast Charging Charger
Nanxin SC9712B
SC9712B is a highly integrated dual-port fast charging SoC, integrating a 36V efficient synchronous buck controller, supporting 1C1A configuration, with a total output power of up to 140W, meeting the fast charging needs of computers, tablets, and mobile phones. This chip is compatible with USB PD 2.0/3.0/3.1 and PPS protocols, as well as mainstream DPDM fast charging protocols such as Apple 2.4A, BC1.2, DCP, and UFCS, providing strong device adaptability and intelligently recognizing charging scenarios to match optimal solutions.
SC9712B supports dual-chip collaborative operation, enabling communication and intelligent power distribution for dual USB-C ports without the need for an MCU. It can output full power when operating in single-port mode, and automatically adjust power when both ports are in use, significantly enhancing the flexibility of charging multiple devices. Additionally, it integrates NTC temperature monitoring and multiple protection mechanisms for over-voltage, under-voltage, over-current, and short-circuit, with external resistors configurable for maximum voltage and power characteristics, packaged in a QFN32 package, effectively simplifying the design process of fast charging devices.
Application Cases:
1.Disassembly Report: Anker 14-in-1 Thunderbolt 5 Desktop Charging Dock
2.Disassembly Report: Xiaomi 67W 2A2C GaN Desktop Fast Charging Socket
Power Bank
Nanxin SC2006A
SC2006A is a highly integrated USB-C DRP chip that provides cost-effective solutions for power banks, car chargers, electric tools, and other applications. This chip integrates mainstream fast charging protocols such as USB-C PD, DPDM, BC1.2, and UFCS, supporting 28V PD3.1 EPR extended power range and 28V VBUS, along with 11 ADC channels, N-MOS, and three port insertion detection modules, flexibly adapting to diverse fast charging scenarios to meet the power supply needs of different devices.
This chip features a built-in 32-bit ARM Cortex-M0 core with a 12MHz CPU, equipped with 128KB flash and 8KB SRAM, providing strong control and data processing capabilities. It also integrates multiple protection mechanisms such as OVP, OCP, and SCP, packaged in a QFN44 package, optimizing device space layout while simplifying design.
Nanxin SC2016A
SC2016A is a newly launched three-in-one power bank SoC solution from Nanxin Technology, supporting 2 to 5 series batteries and input voltages from 3.3V to 22V. By integrating the MCU, protocol controller, and buck-boost controller into a single chip, it provides designers and developers with a high-performance, highly integrated, and low-cost power management solution.
Thanks to the high integration of SC2016A, using this chip can effectively reduce the demand for external components. The chip integrates multiple functions, including USB PD baseband PHY, Type-C detection, VBUS discharge path, VCONN power, and DPDM fast charging protocol PHY, and is equipped with an 11-bit high-performance ADC, NMOS gate driver, I2C interface, and various protection circuits, effectively preventing issues such as over-voltage, under-voltage, over-current, short-circuit, and over-temperature.
SC2016A supports dual independent CC and DPDM fast charging protocol control, enabling independent applications with a universal external DC-DC converter, effectively enhancing system flexibility and scalability. Additionally, the chip’s port pins have high voltage resistance capabilities, better coping with various charging scenarios, enhancing system reliability. The chip features a built-in LDO and optimized selection logic, allowing for more precise control of voltage and current, while the built-in discharge circuit and port MOS current sampling function further simplify design, reduce component count, and significantly lower BOM costs.
Moreover, SC2016A is equipped with a 32-bit ARM Cortex-M0 core, supporting all mainstream fast charging protocols such as PD3.2, UFCS, high and low voltage SCP, SVOOC, MI, and more, with multi-level low-power modes, achieving as low as 10μA power consumption in shipping mode, supporting low-power applications.
Related Reading:
1.Nanxin Technology Launches Highly Integrated Three-in-One Power Bank SOC Solution SC2016A
Charging Head Network Summary
The support for AVS technology in the iPhone 17 series is expected to rapidly increase market demand for AVS-compatible chargers and power banks. Nanxin Technology has completed product layout in advance during this round of technical iteration. These AVS-compatible fast charging controllers and SoCs for chargers and power banks feature high integration, multi-protocol compatibility, and can effectively shorten the development cycle for terminal manufacturers and reduce BOM costs, thus achieving faster compatibility with new models like the iPhone 17 and the claimed charging performance.
Related Reading:
1.Nanxin Qi2.2 Module Passes WPC Certification, Helping Customers Develop the Latest 25W Wireless Fast Charging for iPhone 17!
2.Nanxin Technology 25W Qi2.2 Magnetic Wireless Charging Module Analysis
3.Nanxin Technology Wireless Charging Module Helps Customers Obtain First Batch of Qi2.2 Certification from WPC
4.Nanxin Technology PD3.1 Fast Charging Chip SC9712 Mass Production, Already Adopted by Multiple Hot-Selling Products
5.Nanxin Technology Launches High-Integration Multi-Port Mobile Power Supply Solution, Supporting Stable Development of the Power Bank Market