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 Product Features

  • 40V Input Voltage Surge
  • 4.5V-36V Operational Input Voltage
  • 5.1V/9.1V/12.1V Output with +/-1% Accuracy
  • Up to 3.0A Output current
  • Constant Current Regulation Limit
  • QC2.0 Decoding + USB Auto-Detect
  • Support Apple 2.4A, Samsung and BC1.2
  • Hiccup Mode Protection at Output Short
    >90% Efficiency at Full Load
  • 0.5mA Low Standby Input Current
  • 5.7V/10.1V/13.5V Output Over-voltage Protection for 5.1V/9.1V/12.1V Outputs
  • Cord Voltage Compensation
  • Meet EN55022 Class B Radiated EMI Standard
  • 8kV ESD HBM Protection on DP and DM
  • SOP-8EP Package

 

ACT4528 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. ACT4528 has QC2.0 decoding built in to provide 5.1V/9.1V/12.1V outputs as requested by attached portable devices. It also supports Apple 2.4A, Samsung and BC1.2 devices to charge at full current rate. ACT4528 has accurate output current limits under constant current regulation to meet MFi specification. It can provide up to 3.0A output current at 125kHz switching frequency. ACT4528 utilizes adaptive drive technique to achieve good EMI performance while main >90% efficiency at full load for mini size CLA designs. ACT4528 also has output short circuit protection with hiccup mode. The average output current is reduced to below 6mA when output is shorted to ground. Other features include output over voltage protection and thermal shutdown.

ACT4528 is available in a SOP-8EP package and require very few external components for operation.