Active-Semi Solutions for Sustainability
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?Product Features

  • 10V-30V Input Voltage
  • 40V Transparent Input Voltage Surge
  • Up to 1.25A Constant Output Current
  • Output Voltage up to 12V
  • Good EMC Performance on Single Layer PCB
  • 2% Feedback Voltage Accuracy
  • Up to 90% Efficiency
  • 125kHz Switching Frequency Eases EMI Design
  • Resistor Programmable Outputs
    ? Current Limit from 500mA to 1250mA Patented cable compensation from DC Cable Compensation from 0Ω to 0.5Ω
  • Patent Pending ActiveCC Constant Current Control
    ? Integrated Current Control Improves Efficiency, Lowers Cost, and Reduces?Component Count
  • Advanced Feature Set
    • Integrated Soft Start
    • Thermal Shutdown
    • Secondary Cycle-by-Cycle Current Limit
    • Protection Against Shorted ISET Pin
  • SOP-8 Package

ACT4501 is a dedicated cost-effective DC-DC?converter for 5V/1A car charger applications with a wide input voltage and high efficiency. The converter operates in either CV (Constant OutputVoltage) mode or CC (Constant Output Current) mode. ACT4501 provides up to 1.25A output current at 125kHz switching frequency. ActiveCC is a patent-pending control scheme to
五分快三计划 achieve high accuracy sensorless constant current control. ActiveCC eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and high-brightness LED drive for architectural lighting. The ACT4501?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 ACT4501?is available in a SOP-8 package and require very few external components for operation.





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