TC3827

TC3827 Lithium-Ion Battery Charger FEATURES s s s s s s s s s Low Power Dissipation Shutdown Current: 1µA (Typical) Space-Saving 8-Pin MSOP Package No Inductor Required 1% Overall System Accuracy Charge Current Monitor Output Charge Status Indicator Output Foldback Current Limiting –20°C to +85°C Ambient Operating Temperature Range GENERAL DESCRIPTION The TC3827 is a battery charger controller for a single cell Li-Ion battery. Using an external PMOS transistor, safe and fast charging of a single Li-Ion cell is accomplished. Features include over-current foldback, charge current monitor, and charge status LED indicator output. An overall system accuracy of 1% ensures that the cell capacity is fully utilized without cycle life degradation. An external resistor sets charge current. The TC3827 operates with an input voltage range from 4.5V to 5.5V. It is specified over the ambient operating temperature range of –20°C to +85°C and is available in a space-saving 8-Pin MSOP. TYPICAL APPLICATIONS s s s s s s s s PDAs Cradle Chargers Li-Ion Battery Chargers Desktop Computers Hand-Held Instruments Cellular Telephones Battery Operated Devices Self-Charging Battery Packs ORDERING INFORMATION Part No. TC3827-4.1VUA TC3827-4.2VUA Package 8-Pin MSOP 8-Pin MSOP Temperature Range –20°C to +85°C –20°C to +85°C PIN CONFIGURATION 8-Pin MSOP SHDN 1 GND 2 MODE 3 IMON 4 8 VIN 7 VSNS FUNCTIONAL BLOCK DIAGRAM VIN VSNS GND + C/A K IMON TC3827 6 VDRV 5 VOUT – + E/A – TYPICAL APPLICATION CI...