Overview

CX8831CA is a synchronous step‑down converter integrating multiple fast‑charging protocols. It supports USB Type‑C, PD3.2 and PPS protocols, Qualcomm QC2.0/3.0/3.0+, Huawei FCP/SCP/HVSCP, VOOC, MediaTek PE2.0, Samsung AFC, USB BC1.2 DCP, and Apple 2.4 A charging specifications. It provides a complete solution for power supply equipment including in‑vehicle charging ports, various fast‑charge adapters and smart power strips.

CX8831CA adopts COT control mode, with built‑in current‑sensing circuit, ripple compensation circuit and dual low‑resistance N‑type power switches.

CX8831CA has a maximum operating input voltage of 36 V and an output voltage range of 3.3 V‑21 V, delivering up to 45 W output power. It adjusts output voltage and current according to the detected fast‑charging protocol.

CX8831CA features input‑voltage adaptability and automatically regulates output power based on input voltage.

The output of CX8831CA has CV/CC characteristics: when the output current is lower than the set value, it works in CV mode with constant output voltage; when the output current exceeds the set value, it enters CC mode and the output voltage decreases.

CX8831CA is equipped with cable compensation function, which raises output voltage accordingly as output current increases to compensate for voltage drop caused by cable impedance.

CX8831CA supports second‑time OTP programming to realize on‑line firmware upgrade.

Features

• Synchronous switching step‑down converter 

        ‑ Built‑in 29 mΩ / 27 mΩ power switches 

        ‑ Operating input voltage range: 6‑36 V 

        ‑ Conversion efficiency up to 97% 

        ‑ Constant‑voltage / constant‑current mode supported 

        ‑ Built‑in soft‑start, full‑load startup supported

• Cable compensation function supported

  ‑ Supports cable communication with internal resistance up to 180 mΩ

• On‑line upgrade supported

• Multiple safety protections

  ‑ Over‑voltage / under‑voltage protection, over‑current protection, short‑circuit protection

  ‑ Thermal power de‑rating and secondary over‑temperature protection

• ESD immunity: ±4 kV

• Supports USB Power Delivery (PD) 3.2 and PPS protocols

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

  ‑ OUTMAX: 45 W
  ‑ Configurable APDO: 5 V / 9 V / 15 V / 20 V Prog

• Supports multiple fast‑charging protocols

  ‑ Quick Charge 2.0 / 3.0 / 3.0+

  ‑ Xiaomi CHARGE TURBO 27 W protocol

  ‑ Huawei FCP / HVSCP protocol (Huawei priority supported)

  ‑ Samsung AFC 5 V / 9 V / 12 V protocol

  ‑ OPPO VOOC protocol

  ‑ MTK PE2.0 protocol

Applications

• Multi‑port fast chargers 

• USB charging devices 

• Outdoor energy‑storage equipment