EUP8075 ds8075 ver1.2 jan. 2011 1 usb-compliant li-ion battery charger integrated with system power-path management description the EUP8075 series of devices are highly integrated li-ion linear chargers and system power path manage ment devices targeted at space-limited portable applicat ions. the devices operate from either a usb port or ac ad apter. the high input voltage range with input overvoltage protection supports low-cost unregulated adapters. the EUP8075 offer dc supply power-path management with autonomous power-source selection, power fets and current sensors, high-accuracy current and voltage regulation, charge status, and charge termination, in a single monolithic device. the EUP8075 power the system while independently charging the battery. this feature reduces the char ge and discharge cycles on the battery, allows for proper charge termination and allows the system to run with an ab sent or defective battery pack. this feature also allows fo r the system to instantaneously turn on from an external power source in the case of a deeply discharged battery p ack. the ic design is focused on supplying continuous power to the system when available from the ac adapter or batter y sources. typical application circuit features integrated power-path management feature simultaneously and independently powers the system and charges the battery integrated usb charge control with selectable 100ma and 500ma maximum input current ensures compliance to usb-if standard supports up to 1.4 amps charge current 24v input rating thermal regulation for charge control programmable pre-charge and fast-charge safety timers reverse current, short-circuit, and thermal protections status indicator-charging, done, power good 3mm 3mm tqfn-16 package rohs compliant and 100% lead (pb)-free halogen-free application smart phones and pda mp3 players digital cameras and handheld devices internet appliances figure 1.
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