ACT3780 Active-Semi Product Brief, 29-May-08 Advanced Information―All Information Subject to Change ActivePathTM Battery Charger FEATURES GENERAL DESCRIPTION • ActivePathTM System Power Selection of Best The ACT3780 is a complete battery charging and management solution for one cell Lithium-Ion or Lithium-Polymer battery. The ACT3780 incorporates the ActivePath architecture which automatically selects the best available input supply for the system. • • • • • • • • • • • • • • Available Input Supply 40mΩ Battery Switch for Highest Efficiency Dynamic Control of Charging Current Allowing System to Draw Maximum Load from AC/USB Input ±0.5% Battery Voltage Accuracy Up to 12V Input 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 or TDFN3545-20 Packages When an external power source such as an AC adapter or a USB port is connected in, the ACT3780 regulates the system voltage to 4.8V in addition to providing charging current to the battery. If the external input source is not present or the system load current is more than the input source can provide, the ActivePath supplies additional current from the battery to the system. The ACT3780 charger is a complete, thermally regulated, stand-alone single cell linear Li+ charger that integrates an internal power 12V MOSFET. The battery regulation voltage is ±0.5% accurate, and is factory programmed from 4.2V (other voltages available upon request). The ACT3780 is available in an thermally enhanced 4mm x 4mm Thin-QFN and 3.5mm × 4.5mm ThinDFN 20-pin packages. APPLICATIONS • • • • • Personal Navigation Devices Smart Mobile Phones Blue-Tooth Devices Portable Media Players Portable Devices SIMPLIFIED APPLICATION CIRCUIT AC Adapter/USB CHG_IN SYS Li-ion Battery To SYSTEM Pb BAT STAT1 + ISET Pb-free STAT2 ACT3780 Path TM Active Innovative PowerTM ActivePathTM is a trademark of Active-Semi. -1- www.active-semi.com Copyright © 2008 Active-Semi, Inc. ACT3780 Active-Semi Product Brief, 29-May-08 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 ACT3780NY-T 4.2V 4.6V TDFN3545-20 20 -40°C to 85°C c: Battery and system voltage options detailed in this table represent standard voltage options, and are available for samples or production orders. Contact Active-Semi for more information regarding semi-custom output voltage combinations. d: 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. FUNCTIONAL BLOCK DIAGRAM Active-Semi Body Control ACT3780 CHG_IN DC SYS + – Body Control BAT CHGLEV + EN CURRENT SENSE ACIN VOLTAGE SENSE REF BLV1 TH ISET BLV2 System and Charger Control nACOK STAT3 DCCC STAT2 BTR STAT1 THERMAL REGULATION Innovative PowerTM -2- GA 110°C www.active-semi.com Copyright © 2008 Active-Semi, Inc.