ACT2804

    5 V, 3.4 A Dual Cell Battery Power 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 3.0 A
    • Programmable constant output current in boost mode to up to 5 V / 2.1 A
    • No load shutdown and push button turn-on
    • Sophisticated battery protection

    Qorvo's ACT2804 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 ACT2804 IC.

    The product integrates all the functions that a backup battery pack needs, including switching charger, Cell Balancing, 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 turn on/off charging and query charging status. The IC supports LED indication to display charging level on 4 LEDs.

    ACT2804 operates at 400 kHz for switching charger and 400 kHz for boost converter allowing tiny external inductor and capacitors. ACT2804 provides a direct power path from input to output with programmable current limit while providing power to switching charger. Output has higher priority than 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.

    ACT2804 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 Boost
    Battery Cell Dual Cell
    Input Voltage(V) 4.5 to 5.5
    Max Charge Current(A) 1.8
    Built-In LDO Regulator 5 V / 50 mA
    USB On-The-Go (OTG) Yes
    Max OTG Current(A) 3.4
    OTG Output Auto-Detection Yes
    Battery Cell Balancing Yes
    Interface I2C
    ADC No
    Package Type QFN, 40-pin
    Package(mm) 5 x 5
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN EAR99

    EA2804QJ-TEA2804QJ-T Evaluation Kit

    EA2804QJ-T EVK User's Guide

    The high-level of integration included in ACT28xx ICs enable the industry's smallest design of battery chargers and mobile chargers such as Power Banks.

    The smaller PCB and reduced component count and size enables smaller industrial design and associated costs.

    In addition, it allows for larger battery pack to store more energy within the power bank product.

    To access all registers download the software GUI. (Note: ACT2803 and ACT2804 use the same GUI.)

    ACT2803 / ACT2804 GUIACT2803 / ACT2804 GUI

    The ACT2803 / ACT2804 Graphical User Interface (GUI) is packaged in a ZIP file that includes the software and all necessary drivers to communicate with the EA2803QJ-T, EA2803QJ-T0435, EA2804QJ-T and EA2804QJ-T0435 Evaluation Kits, as well instructions on how to use the tool.