ACT43950

    400 V Input Constant Current Output Regulator

    Key Features

    • Input Voltage Range: 180V to 400V
    • Full Charge Output Voltage: 24 V to (90% of V300 Input)
    • (Average) Output Constant-Current: 1 A to 4 A Programmable
    • Protections: UVLO and OVLO (V300, V12), TSD, I/O Open/Short
    • 5 mm × 5 mm QFN

    The ACT43950 is a constant-current (CC) output regulator for capacitor charger or battery charger applications, operating up to 400-V DC input voltage, with fully programmable output setpoints of constant-current target, full-charge and refresh-charge target voltage. The device employs a Qrovo proprietary hysteretic mode control for high conversion efficiency and stable charging operation. This charger IC supports both SiC (Silicon carbide) and output stage, together with a 68 µH inductor.

    This CC output current regulator provides circuit blocks protecting the IC device and the system damage from overvoltage, under-voltage, over-temperature, IC pin open/short errors. This non-isolated solution simplifies dc-to-dc conversion of, roughly, 50 W to 0.5 kW range applications, compared with traditional solutions using bulky transformers.

    The ACT43950 is available in a 40-pin, 5 mm x 5 mm, 0.4-mm pitch QFN package, with a total of 10 pins removed to maintain creepage distance(s) for the 400 V handling.

    Typical Applications

      • Pulsed Power Applications
      • High Voltage Power Supplies
    Charger Topology Constant Current Capacitor
    Battery Cell Count N/A
    Input Voltage(V) 180 to 400
    Max Charge Current(A) 4
    Built-In LDO Regulator No
    USB On-The-Go (OTG) No
    Max OTG Current(A) N/A
    OTG Output Auto-Detection N/A
    Battery Cell Balancing No
    Interface Enable
    ADC No
    Package Type QFN, 30-pin
    Package(mm) 5.0 x 5.0
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN EAR99