innovative power tm - 1 - www.active-semi.com copyright ? 2012 active-semi, inc. activepath tm is a trademark of active-semi. act3780 product brief, 05-dec-12 activepath tm battery charger activepath diagram features ? activepath tm system power selection of best available input supply ? 50m ? 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 applications ? personal navigation devices ? smart mobile phones ? blue-tooth devices ? portable media players ? portable devices general description the act3780 is a complete battery-charging and system power management solution for portable hand-held equipment using single-cell lithium- based batteries. the act3780 incorporates active- semi's proprietary activepath architecture which automatically selects the be st available input supply for the system. 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-requirem ent 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.
act3780 product brief, 05-dec-12 innovative power tm - 2 - www.active-semi.com copyright ? 2012 active-semi, inc. activepath tm is a trademark of active-semi. ordering information c d part number battery voltage system voltage package pins temperature range act3780qy-t 4.2v 4.6v tqfn44-20 20 -40c to 85c ACT3780QY410-T 4.1v 4.6v tqfn44-20 20 -40c to 85c 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 haza rdous substances) standards. d : standard product options are identified in this table. contac t factory for custom options. minimum order quantity is 12,000 u nits. functional block diagram acin ref voltage sense 110c thermal regulation g system and charger control act3780 body control current sense body control bat sys chg_in en chglev btr nblv1 nblv2 nacok nstat2 nstat1 th iset dccc + - system supply ac adaptor usb (optional) precondition + ? + ? thermal shutdown v thl v thh ep nstat3
|
