ACT4501

    30 V, 1.25 A CC/CV Step-Down DC/DC Converter

    Key Features

    • 10 to 30 V input voltage
    • 40 V transparent input voltage surge
    • Up to 1.25 A constant output current
    • Output voltage up to 12 V
    • Good EMC performance on single layer PCB
    • 2% feedback voltage accuracy
    • Up to 90% efficiency
    • 125 kHz switching frequency eases EMI design
    • Resistor programmable outputs
    • Cable compensation from 0 to 0.5 Ohm
    • Patent pending Active CC constant current control
    • Advanced feature set

    Qorvo's ACT4501 is a dedicated cost-effective DC/DC converter for 5 V / 1 A car charger applications with a wide input voltage and high efficiency. The converter operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4501 provides up to 1.25 A output current at 125 kHz switching frequency.

    Active CC is a patent-pending control scheme to achieve high accuracy sensorless constant current control. Active CC eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and high-brightness LED drivers for architectural lighting.

    The product achieves higher efficiency than traditional constant current switching regulators by eliminating the sense resistor and its associated power loss. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.

    ACT4501 is available in a SOP-8 package and requires very few external components for operation.

    Typical Applications

      • Car Chargers
      • Rechargeable Portable Devices
      • General Purpose CC/CV Power Supplies
    Topology Step-Down
    Input Voltage(V) 10 to 30
    Max Output Current(A) 1.25
    Frequency(kHz) 125
    ActiveCharge™ with Qualcomm QC 2.0 No
    AEC-Q100 No
    Cable Compensation Yes
    Sensorless CC Control Yes
    Package Type SOP-8
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN EAR99