A single chip of CX8831CB integrates the synchronous buck DC-DC+ fast charging protocol, which minimizes 

the number of components outside the chip, effectively optimizes the BOM cost of the scheme, and provides 

customers with a DC-DC power supply solution with high cost performance and competitive advantages in the 

market.

CX8831CB single Type-C PD fast charging protocol chip, with simplified periphery, adopts minimalist ESOP-8L 

package, and the maximum output power is 45W. CX8831CB only needs a few capacitors, resistors and 

inductors. Recommendation of fast charging protocol with small space, small volume, high efficiency and low 

cost. Provide CX8831CB sample application, CX8831CB DEMO test, CX8831CB solution development and 

CX8831CB stock support!

CX8831CB Overview:

CX8831CB is a synchronous buck converter with built-in multi fast charging protocols. It supports USB Type-C 

and PD3.1 protocols, Qualcomm QC2.0/3.0/3.0+ protocol, Huawei FCP/SCP/HVSCP protocol, VOOC protocol, 

MediaTek PE2.0 protocol, Samsung AFC protocol, USB BC1.2 DCP protocol and Apple2.4A charging specification,

and provides charging standards for vehicle charging ports, each.

CX8831CB adopts COT control mode, with built-in current sampling circuit and ripple compensation circuit. 

Built-in double N-type low impedance power switch tube, the conversion efficiency is as high as 95.6% when 

24V input and 9V3A output.

CX8831CB has an input working voltage of up to 36V and an output voltage range of 3.3V to 21V, which can 

provide a maximum output power of 45W. The output voltage and current are adjusted according to the 

identified fast charging protocol.

CX8831CB can adapt the input voltage and automatically adjust the output power according to the input voltage.

The output of CX8831CB has CV/CC characteristics. When the output current is less than the set value, the CV 

mode is output and the output voltage is constant. When the output current is greater than the set value, the 

CC mode is output and the output voltage is reduced.

CX8831CB has the function of cable compensation, which increases the output voltage with the increase of 

output current to compensate the voltage drop caused by cable impedance.

CX8831CB supports secondary burning and can realize online upgrade.

Features:

Synchronous switching buck converter

Built-in 29mΩ/27mΩ power switch tube

Input working voltage range 6-36V

The conversion efficiency is as high as 97%

Support CV/CC mode

Support soft start and full load start.

Support line loss compensation function

Support cable communication with internal resistance up to 180mΩ.

Support online upgrade

Have multiple security protection.

Overvoltage/undervoltage protection

Over-current protection and short-circuit protection

Over-temperature power drop and secondary over-temperature protection

ESD characteristics ±4KV

Support USB Power Delivery(PD)3.1.

FPDO can be configured: 5V/9V/12V/15V/20V.

OUT MAX: 45W

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

Support a variety of fast charging protocols

Quick Charge 2.0/3.0/3.0+

Xiaomi CHARGE TURBO 27W protocol

Huawei FCP/HVSCP protocol (supporting Huawei first)

Mainly used in:

Multi-port fast charger

USB charging equipment

Outdoor energy storage equipment