Active-Semi Solutions for Sustainability
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Product Features

  • Up to 40V Input Voltage
  • Up to 1.5A Constant Output Current
  • Output Voltage up to 12V
  • 2% Feedback Voltage Accuracy
  • Up to 93% Efficiency
  • 210kHz Switching Frequency Eases EMI Design
  • Patent Pending Active CC Constant Current  Control
    • Integrated Current Control Improves Efficiency, Lowers Cost, and Reduces Component Count
  • Resistor Programmable Outputs
    • Current Limit from 400mA to 1500mA
    • Patented cable compensation from 0Ω to 0.5Ω
  • ±7.5% CC Accuracy
    • Compensation of Input/ Output Voltage Change
    • Temperature Compensation
    • Independent of Inductance and Inductor DCR
  • SOP-8 Package
  • Advanced Feature Set
    • Integrated Soft Start
    • Thermal Shutdown
    • Secondary Cycle-by-Cycle Current Limit
    • Protection Against Shorted ISET Pin


ACT4515 is a wide input voltage, high efficiency Active CC step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4515 provides up to 1.5A output current at 210kHz switching frequency. Active CC is a patent-pending control scheme to achieve highest accuracy sensorless constant current control. Active CC eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and highbrightness LED drive for architectural lighting. The ACT4515 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.

The ACT4515 is available in a SOP-8 package and require very few external devices for operation.




  •  Car Charger
  • Rechargeable Portable Device
  • General Purpose CC/CV Power Supply







Application NOte

ACT4515 Application Note
High Performance 5V/1.2A Car Charger With USB Application Report with EMI solution