ACT2801

    5 V, 1.5 A Backup Battery Pack Manager

    Key Features

    • Dedicated single chip solution for mobile power with minimal component count
    • High charge & discharge efficiency, 95% boost efficiency (Vbat = 4.1 V)
    • < 10 µA low battery leakage current in Hi-Z mode during storage
    • Programmable input current limit to up to 1.5 A
    • Programmable constant output current in boost mode to up to 5 V / 1.5 A
    • No load shutdown and push button turn-on
    • Sophisticated battery protection for OCP/OVP/OTP/SCP
    • Battery disconnection at output short

    Qorvo's ACT2801 is a high-performance, low-profile battery management IC that enables the smallest size solutions for backup battery packs and standalone battery chargers. Each solution can be implemented with a single ACT2801 IC.

    ACT2801 can enable 5 V / 1 A power bank solutions and can support input current of up to 1.5 A and an output current of up to 1.5 A.

    The product integrates all the functions that a backup battery pack needs, including switching charger, boost converter and LED indication. The product also includes an input to obtain user feedback (for example, via a push button), to support various user-interface functions such as turning charging on/off and query charging status. The IC supports LED indication to display charging level on 4 LEDs.

    ACT2801 operates at 2.2 MHz / 1.1 MHz for switching charger and 1.1 MHz / 0.55 MHz for boost converter allowing tiny external inductors and capacitors. ACT2801 provides a direct power path from input to output with a programmable current limit while providing power to the switching charger. Output has higher priority than the battery charger if the programmed input current limit is reached.

    The product charges the battery with the full cycle of preconditioning, fast charge with constant current and constant voltage until end of charge. The battery charger is thermally regulated at 110 °C with charge current foldback. The product's boost converter steps battery voltage up to 5 V. The boost converter features high efficiency, constant current regulation, short circuit protection and over-voltage protection.

    ACT2801 provides 3.5 mA constant current to drive 4 LEDs to indicate battery level and charge status. Battery impedance is compensated for battery level indication.

    Typical Applications

      • Backup Battery Packs
      • Power Banks
      • Mobile Power
      • Standalone Battery Chargers with USB Output
      • Bluetooth Speakers
    Charger Topology Buck
    Battery Cell Single Cell
    Input Voltage(V) 4.5 to 5.5
    Max Charge Current(A) 1.5
    Built-In LDO Regulator No
    USB On-The-Go (OTG) Yes
    Max OTG Current(A) 1.5
    OTG Output Auto-Detection No
    Battery Cell Balancing No
    Interface None
    ADC No
    Package Type QFN, 24-pin
    Package(mm) 4 x 4
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN EAR99

    EA2801QL-T1028EA2801QL-T1028 Evaluation Kit

    EA2801QL-T1028 User's Guide

    This document describes the characteristics and operation of the Qorvo EA2801QL-T1028 evaluation kit (EVK).

    It provides the setup and operation instructions, schematic, layout, BOM, and test data. It demonstrates the ACT2801QL-T1028.