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Buck Converter
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  • Model No. :

    8831C

  • Withstand voltage :

    36V

  • Output voltage :

    3.3V-21V

  • Output current :

    3A

  • Working mode :

    Buck

  • Packaging :

    QFN4*4-16L
Free Sample
Datesheet

CATEGORY
  • product details

Overview

The 8831C 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 delivers a complete solution for power‑supplying equipment such as in‑vehicle charging ports, various fast‑charge adapters and smart power strips.

The 8831C adopts a COT control mode, with integrated current‑sensing circuit, ripple compensation circuit, and dual low‑resistance N‑type power switches.

The CX8831C features a maximum operating input voltage of 36 V and an output voltage range from 3.3 V to 21 V, delivering up to 45 W output power. It adjusts output voltage and current according to the detected fast‑charging protocol.

The 8831C features adaptive input‑voltage capability and automatically adjusts output power based on the input voltage.

Its output implements CV/CC characteristics: when the output current is below the set value, it operates in CV mode with constant output voltage; when the output current exceeds the set value, it enters CC mode and the output voltage drops.

Equipped with cable compensation, the 8831C raises the output voltage as output current increases to compensate for voltage drop caused by cable impedance.

Two 8831C chips can be interconnected via CHIP‑LINK, enabling independent high‑power operation for two USB‑C ports; output power will be reduced when both ports work simultaneously.
When one USB‑C port operates within 5 V/200 mA (1 W), the other USB‑C port can deliver high‑power output.

The 8831C supports second‑time OTP programming to realize on‑line firmware upgrade.


Features

  • Synchronous switching step‑down converter 

         ‑ Integrated 29 mΩ / 27 mΩ power switches 

         ‑ Operating input voltage range: 6‑36 V 

         ‑ Up to 97% conversion efficiency 

         ‑ Constant‑voltage / constant

         ‑current mode support 

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

  • Cable compensation supported 

         ‑ Supports cable communication with internal resistance up to 180 mΩ

  • On‑line upgrade supported

  • Multiple safety protections 

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

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

  • ESD immunity: ±4 kV

  • CHIP‑LINK dynamic power allocation
    ‑ 4‑level automatic power allocation for Apple devices

  • Dual‑port light‑load operation mode supported

  • USB Power Delivery (PD) 3.2 & PPS protocol supported 

         ‑ 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

  • Multiple fast‑charging protocols supported 

         ‑ QuickCharge 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


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