In this rapidly changing era of intelligent electronics, compact size, high efficiency, and highly integrated power supply solutions are increasingly favored by users. Integrating charging protocols into DC-DC buck converter chips not only simplifies the layout of components on the PCB, reduces circuit complexity, shortens the development cycle of solutions, improves production efficiency, but also further optimizes product costs. By integrating charging protocols, DC-DC buck converter chips can communicate better with devices such as chargers, car chargers, and intelligent power strips, achieving intelligent control and management. It efficiently enhances charging efficiency and provides users with a better charging experience.

CXW has launched a variety of DC-DC buck chips with built-in protocols to meet the needs of different application scenarios. Here, I would like to recommend a dual-C port DC-DC integrated fast charging PD solution - CX8831CQ.

The CX8831CQ is a buck SoC chip integrated with multiple fast charging protocols, using a QFN4*4-16L package, and an efficient synchronous buck converter is integrated inside the chip.

CX8831CQ supports USB Type-C and PD3.1 protocol, Qualcomm QC2.0/3.0/3.0+ protocols, Huawei FCP/SCP/HVSCP protocols, VOOC protocol, MediaTek PE2.0 protocol, Samsung AFC protocol, as well as USB BC1.2 DCP protocol and Apple2.4A charging specifications. It supports dual CC port outputs, with CHIP-LINK interconnection, capable of achieving simultaneous independent fast charging of dual C ports with PD3.1 (reducing power when multiple ports are inserted at the same time). It can provide a complete high-power dual-port power fast charging solution for car chargers.

CX8831CQ: Dual C port 45W USB PD integrated multi-protocol DC-DC buck solution.

CX8831CQ supports a maximum voltage input of 36V and supports five voltage output levels of 5V, 9V, 12V, 15V, and 20V. CX8831CQ uses a COT control mode, with built-in current sampling circuits and ripple compensation circuits. It has two N-type low impedance power switch tubes built-in. With only two inductors and two SOCs, a fast charging solution with reduced power when multiple ports are inserted can be achieved, effectively reducing the overall size of the solution and BOM costs.

CX8831CQ has a cable compensation function, which increases the output voltage accordingly as the output current increases to compensate for the voltage drop caused by cable impedance.

CX8831CQ can work at high power for a single USB-C port through interconnection of two chips (CHIP-LINK), and when working simultaneously, it reduces to low power output.

CX8831CQ can automatically adapt to input voltage and automatically adjust output power according to input voltage.

The output of CX8831CQ has CV/CC characteristics. When the output current is less than the set value, it is in CV mode, and the output voltage is constant. When the output current is greater than the set value, it is in CC mode, and the output voltage decreases.

When one of the USB-C ports is operating at 5V/200mA (1W) or less, the other USB-C port can achieve high-power output.

CX8831CQ supports secondary burning, which can achieve online upgrades.

Features:

• Synchronous switch buck converter

• Integrated 29mΩ/27mΩ power switch tubes

• Input operating voltage range of 6-36V

• Conversion efficiency up to 97%

• Supports CV/CC mode

• Supports soft start and full-load start

• Supports cable loss compensation function

• Supports communication with cables having an internal resistance as high as 180mΩ

• Supports online upgrade

• Equipped with multiple safety protections

• Over-voltage/under-voltage protection

• Over-current protection, short-circuit protection

• Thermal power reduction and secondary thermal protection

• ESD characteristic ±4KV

• CX8831CQ supports CHIP-LINK dynamic power distribution

• Supports automatic power allocation in four levels for Apple devices

• CX8831CQ supports dual-port light-load working mode

• Supports USB Power Delivery (PD) 3.1

• FPDO configurable: 5V/9V/12V/15V/20V

• Maximum output power (OUT MAX): 45W

• APDO configurable: 5V/9V/15V/20V Prog

• Supports a variety of fast-charging protocols

• Quick Charge 2.0/3.0/3.0+

• Xiaomi CHARGE TURBO 27W protocol

• Huawei FCP/HVSCP protocol (with priority support for Huawei)

• Samsung AFC 5V/9V/12V protocol

• OPPO VOOC protocol, MTK PE2.0 protocol

Applications:

• Multi-port fast chargers

• USB charging devices

• Outdoor energy storage devices