40 V, 3.0 A CC/CV Step-Down DC/DC Converter with USB-PD

    Key Features

    • USB-PD support
    • Passes USB-IF certification: Test ID 1010060
    • 40 V input voltage surge
    • 4.5 to 36 V operational input voltage
    • 5.1 / 9.1 / 12.1 V output with +/- 1% accuracy
    • Up to 3.0 A output current
    • Constant current regulation limit
    • Hiccup mode protection at output short
    • > 90% efficiency at full load
    • 0.5 mA low standby input current
    • 5.1 / 9.1 / 12.1 V Output over-voltage protection
    • Cord voltage compensation
    • Meets EN55022 Class B radiated EMI standard

    Qorvo's ACT4527 is a wide input voltage, high efficiency step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode.

    ACT4527 has an interface for USB-PD control via a tri-state digital pin. Vout is 5.1 V if this pin is floating, Vout is 9.1 V when this pin's voltage is less than 0.8 V and Vout is 12.1 V when this pin's voltage is more than 2.0 V.

    The product has accurate output current limits under constant current regulation. It provides up to 3.0 A output current at 125 kHz switching frequency. ACT4527 utilizes an adaptive drive technique to achieve good EMI performance while maintaining greater than 90% efficiency at full load for mini-size CLA designs. ACT4527 also has output short circuit protection with hiccup mode. The average output current is reduced to below 6 mA when output is shorted to ground. Other features include output over-voltage protection and thermal shutdown.

    ACT4527 is available in a SOP-8EP package and requires very few external components for operation.

    Typical Applications

      • Car Chargers
      • Cigarette Lighter Adapters (CLAs)
      • Rechargeable Portable Devices
      • CV/CC Regulation DC/DC Converters
    Topology Step-Down
    Input Voltage(V) 6 to 36
    Max Output Current(A) 3.0
    Frequency(kHz) 125
    ActiveCharge™ with Qualcomm QC 2.0 No
    AEC-Q100 No
    Cable Compensation Yes
    Sensorless CC Control Yes
    Package Type SOP-8EP
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN EAR99