ACT4528 Datasheet | Active-Semi

Rev 1.2, December 28th, 2015 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 Devices - Hiccup Mode Protection at Output Short - >90% Efficiency at Full Load - 0.5m A Low Standby Input Current - 5.7V/10.1V/13.5V Output Over-voltage Protection for 5.1V/9.1V/12.1V Outputs - Cord Voltage pensation - Meet EN55022 Class B Radiated EMI Standard - 8k V 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 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 125k Hz 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 6m A 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 ponents for operation. Typical Application Circuit 4.5V to 40V C1 C2 47μF...