ACT3780 Product Brief, 05-Dec-12 ActivePathTM Battery Charger FEATURES GENERAL DESCRIPTION • ActivePath The ACT3780 is a complete battery-charging and system power management solution for portable hand-held equipment using single-cell Lithiumbased batteries. The ACT3780 incorporates ActiveSemi's proprietary ActivePath architecture which automatically selects the best available input supply for the system. • • • • • • • • • • • • • • TM System Power Selection of Best Available Input Supply 50mΩ Battery Switch for Highest Efficiency Dynamic Control of Charging Current Allowing System to Draw Maximum Load from AC/USB Input ±0.5% Battery Charge Voltage Accuracy Up to 12V Input with Over Voltage Protection Thermal Regulation for Charge Control Charge Status Outputs for LED or System Interface Battery Voltage Level Indication Programmable Fast Charge Current Programmable Charging Timer Low Reverse Leakage Current Short-Circuit and Thermal Protection Preconditioning for Deeply Depleted Battery Low Quiescent Current Standby Mode Space-Saving, Thermally-Enhanced TQFN44-20 Packages The ActivePath architecture performs three important functions: First, the battery is charged while powering with the system, minimizing current draw from the battery while ensuring that sufficient current is available to power the system. Second, if no input supply is available, system power is automatically switched to the battery. And finally, if the system load-requirement exceeds the capability of the input supply, ActivePath automatically supplements the input with the battery to satisfy the system's power requirements. In addition to ActivePath, the ACT3780 charger features a complete, high-accuracy (±0.5%), thermally regulated, stand-alone single cell linear Li+ charger with an integrated 12V power MOSFET. The ACT3780 is available in a thermally enhanced 4mm × 4mm Thin-QFN44-20. APPLICATIONS • • • • • Personal Navigation Devices Smart Mobile Phones Blue-Tooth Devices Portable Media Players Portable Devices ActivePath DIAGRAM Innovative PowerTM ActivePathTM is a trademark of Active-Semi. -1- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT3780 Product Brief, 05-Dec-12 ORDERING INFORMATIONcd PART NUMBER BATTERY VOLTAGE SYSTEM VOLTAGE PACKAGE PINS TEMPERATURE RANGE ACT3780QY-T 4.2V 4.6V TQFN44-20 20 -40°C to 85°C ACT3780QY410-T 4.1V 4.6V TQFN44-20 20 -40°C to 85°C c: All Active-Semi components are RoHS Compliant and with Pb-free plating unless specified differently. The term Pb-free means semiconductor products that are in compliance with current RoHS (Restriction of Hazardous Substances) standards. d: Standard product options are identified in this table. Contact factory for custom options. Minimum order quantity is 12,000 units. FUNCTIONAL BLOCK DIAGRAM Body Control (Optional) AC Adaptor ACT3780 CHG_IN SYS System Supply USB Body Control BAT ACIN + CURRENT SENSE EN VOLTAGE SENSE PRECONDITION REF nBLV1 CHGLEV VTHH TH nBLV2 + – + – VTHL Thermal Shutdown nACOK System and Charger Control ISET nSTAT3 nSTAT2 DCCC nSTAT1 BTR THERMAL REGULATION EP Innovative PowerTM ActivePathTM is a trademark of Active-Semi. -2- G 110°C www.active-semi.com Copyright © 2012 Active-Semi, Inc.