ACT4528

ACT4528 40V/3.0A CV/CC Buck Converter Featuring QC2.0 and USB Auto-Detect 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 APPLICATIONS Car Charger Cigarette Lighter Adaptor (CLA) Rechargeable Portable Device CV/CC regulation DC/DC converter TYPICAL APPLICATION CIRCUIT 4.5V to 40V C1 C2 47μF 10μF C3 CSN HSB 22nF Rcs 25mΩ IN SW ACT4528 CSP L1 47μH GND DP DM D1 C4 C5 C6 22μF 220μF 2.2μF SK54L GENERAL DESCRIPTION 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 fr...