ACT4529 Datasheet | Active-Semi

Rev 1, October 13th, 2015 40V/3.0A CV/CC Buck Converter Featuring QC2.0 ,USB Auto-Detect and USB-PD Features - Qualm® Quick Charge™ 2.0 Certified - 40V Input Voltage Surge - 6V-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 + USB-PD Type-C Support - 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 ACT4529 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. This device has QC2.0 built in to provide 5.1V/9.1V/12.1V outputs as requested by attached portable devices. Besides building in QC2.0 decoding, it also supports Apple, Samsung and BC1.2 devices to charge at full current rate. ACT4529 has an interface for USB-PD control via a tri-state digital pin. Vout is 5.1V if this pin is floating, Vout is 9.1V when this pin voltage is less than 0.8V and Vout is 12.1V while this pin voltage is more than 2.0V. ACT4529 has accurate output current limits under constant current regulation to meet MFi specification. It provides up to 3.0A output current at 125k Hz switching frequency. ACT4529 utilizes adaptive drive technique to achieve good EMI performance while main >90% efficiency at full load for mini size CLA designs. It 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...