Overview

The CX8831CQ is a synchronous buck converter with multiple integrated fast charging protocols. It supports USB Type-C and PD3.2 protocols, including PPS, Qualcomm QC2.0/3.0/3.0+, Huawei FCP/SCP/HVSCP, VOOC, MediaTek PE2.0, Samsung AFC, USB BC1.2 DCP, and Apple 2.4A charging specifications. It provides a complete solution for power supply equipment such as car charging ports, various fast chargers, and smart power strips.

The CX8831CQ employs a COT control mode, integrates a current sampling circuit and ripple compensation circuit, and features integrated dual N-type low-impedance power switches. The CX8831CQ has a maximum input operating voltage of 36V, an output voltage range of 3.3V to 21V, and can deliver a maximum output power of 45W, adjusting the output voltage and current according to the identified fast charging protocol.

The CX8831CQ adapts to the input voltage, automatically adjusting the output power based on the input voltage.

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

The CX8831CQ features cable compensation function, increasing the output voltage correspondingly as the output current rises to compensate for the voltage drop caused by cable impedance.

By interconnecting two CX8831CQ chips (CHIP-LINK), dual USB-C ports can operate independently at high power, switching to low-power output when both ports are in use simultaneously. When one USB-C port operates within 5V/200mA (1W), the other USB-C port can achieve high-power output.

The CX8831CQ supports secondary programming, enabling online firmware upgrades.

Features

● Suitable for Automotive Electronics Applications

● Automotive Grade AEC-Q100 Grade 2 Certification

● TID: 13382

● Synchronous Step-Down Buck Converter

-Integrated 29mΩ/27mΩ Power Switches

-Input Operating Voltage Range: 6-36V

-Conversion Efficiency Up to 97%

-Supports Constant Voltage and Constant Current Modes

-Built-in Soft-Start, Supports Full Load Startup

● Supports Cable Compensation Function

● Supports Communication with Cables up to \(180\mathrm{m}\Omega\) Impedance

● Supports Online Firmware Upgrade

● Multiple Safety Protections

-Over-Voltage/Under-Voltage, Over-Current Protection, Short-Circuit Protection

-Over-Temperature Power Reduction and Secondary Over-Temperature Protection

● ESD Characteristic \(\pm\)4KV

● Supports CHIP-LINK Dynamic Power Distribution

● Supports Automatic 4-Level Power Allocation for Apple Devices

● Supports Dual-Port Light Load Operation Mode

● Supports USB Power Delivery (PD) 3.2 and PPS Protocol

    - FPDO Configurable: 5V/9V/12V/15V/20V

    - OUTMAX: 45W

    - APDO Configurable: 5V/9V/15V/20V Prog

● Supports Multiple Fast Charging Protocols

    - Quick Charge 2.0/3.0/3.0+

    - Xiaomi CHARGETURBO 27W Protocol

    - Huawei FCP/HVSCP Protocol (Supports Huawei Priority)

    - 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