AAT3692

DATA SHEET AAT3692 Dual Input 1.6A Linear Charger with 28V OVP in a 3x4 TDFN Package General Description The AAT3692 BatteryManager™ is an integrated single cell Lithium-Ion (Li-Ion) battery charger IC, designed to operate from USB ports, AC adapter inputs, or from a cellular phone charger adapter up to an input voltage of 7.2V typical. For increased safety, the AAT3692 also includes over-voltage input protection (OVP) up to 28V. The AAT3692 precisely regulates battery charge voltage and current for 4.2V Li-Ion battery cells. The charge current can be programmed up to 1.6A for ADP charging and 0.5A for USB charging by external resistors on the ADPSET/USBSET pins; the percentage of the termination charging current is programmable by an external resistor on the RTERM pin. In the case of an over-voltage condition of ADP or USB input power exceeding typical 7.2V, the internal series switch opens, blocking the damage to the battery and charging circuitry. The AAT3692 also includes a no-battery present input (NOBAT). When NOBAT indicates that no battery is present, the charging function will be suspended while OVP is still active. Battery charging status is continuously monitored for fault conditions. In the event of a battery over-voltage or chip over thermal failure, the charger will automatically suspend charging, protecting the charging device, control system and battery, until the fault condition is removed. An open drain POK pin indicates the valid input of AC adapter or USB...