Introduction

In today's world, our dependence on electronic devices has grown significantly, and along with it, the demands for faster charging speeds and greater energy efficiency have risen. Traditional chargers typically utilize various chips to manage different functions. While this design meets basic user requirements, it complicates circuit design, increases product size and development costs, and makes maintenance and troubleshooting more challenging.

Recently, Southchip introduced the SC9712A, a protocol chip with power management features; So with this cip, you don't need an extra PMIC anymore. This chip supports the latest PD3.1 140W charging power and integrates multiple protocols. It supports dual-chip cooperation, leading to chip savings, simplified design, and reduced cost and size compared to traditional solutions.

Southchip SC9712A

The SC9712A is a highly integrated dual-port fast-charging SoC that supports various fast-charging protocols. It features a 36V high-efficiency synchronous buck controller with a maximum output current of 7A and configurable switch frequency from 80k to 600kHz. Equipped with a set of USB-C ports and two DPDM fast-charging protocol control interfaces, it minimizes external components, enabling fast charging for both USB ports (1C1A, USB-C + USB A) with up to 140W charging power for laptops, tablets, and smartphones.

SC9712A's USB-C port is DFP port, which supports Type C protocol and USB PD 2.0, 3.0, 3.1 protocols. Its DPDM interface can also support Apple 2.4A mode, BC1.2, DCP, HVDC, FC, SCP, UFCS and other fast

charging protocols.

When used with this chip, the USB-A port can automatically detect the insertion and removal of charging devices, including Apple's Lightning cables. It is also compatible with various fast charging protocols, including Apple 2.4A, BC1.2, DCP, HVDCP, AFC, FCP, SCP, and more.

As shown in the diagram, the SC9712A can work with two chips to ensure that both USB-C ports can output at the same maximum power when used individually and automatically allocate power when used simultaneously. Additionally, it can be used in a 2C1A configuration without the need for MCU control.

Compared to traditional dual-port solutions, the SC9712A integrates fast charging protocols for DCDC and C+A ports, simplifying circuit design and facilitating product development. It can provide fast charging for two USB ports (1C1A, USB-C + USB A) with a power output of up to 140W (28V 5A) for portable electronic devices like laptops, tablets, and phones. This enhances the user experience, especially for MacBook Pro users with 140W PD fast charging support, and reduces product size and production costs. It is primarily used in multi-port adapters, car chargers, fast charging power strips, and other devices.

Furthermore, chargers equipped with the SC9712A support CC/CV mode on both outputs and feature NTC temperature monitoring and multiple protection mechanisms, including overvoltage protection, overcurrent protection, short circuit protection, and over-temperature protection, to effectively safeguard the chip and system. It comes in a 32-pin 4mm x 4mm QFN package.

Summary of ChargerLAB

The Southchip SC9712A is a highly integrated dual-port fast charging SoC with support for multiple fast charging protocols and a power output of up to 140W. It features USB-C and DFP interfaces design, supporting Lightning cable state recognition and intelligent compatibility with various fast charging protocols. Additionally, it offers multiple protection mechanisms, including overvoltage, overcurrent, short circuit, and over-temperature protection, ensuring device and system safety.

Its standout feature is the support for dual-chip cooperation, simplifying the circuit design for multi-port fast chargers and making development easier. Moreover, the SC9712A has received UFCS certification, making it an efficient and convenient solution for multi-port adapters, car chargers, fast-charging power strips, and similar applications.

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