AAT3691
Description
The AAT3691 Battery Manager™ 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 typical 6.75V. For increased safety, The AAT3691 also includes over-voltage input protection (OVP) up to 28V.
The AAT3691 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. In the case of an over-voltage condition of ADP or USB input power exceeding typical 6.75V, the internal series switch opens, blocking the damage to the battery and charging circuitry.
The AAT3691 also includes a no-battery present input (NOBAT). When the NOBAT indicates that no battery is present, OVP block will prevent the input power from passing through the OVP block and suspend the charging function.
Battery...
