Analog Devices (MAX1736EUT42+T) Battery Charger, 1 Cell of Li-Ion battery

Battery Charger, 1 Cell of Li-Ion battery, 22V input, 4.2V / 2A charge, SOT-23-6 Product Overview The MAX1736EUT42+T is a single-cell Li+ battery charger for current limited supply in 6 pin SOT-23 package. It provides simple, safe, low cost method of charging single-cell Li+ battery with nearly no heat generation. Combined with current limited voltage source IC provides precharge, fast-charge and top-off-charge capabilities. After constant current fast charge, top-off safely finishes charging battery by pulse width modulating charge current. The top-off on-time is kept below electrochemical time constant of cell. The key advantage of this method is charge circuit is small and generates minimal heat while providing a safe method of charging to ensure maximum cell life. It initiates charging in one of four ways, battery insertion, charger power-up, battery voltage threshold and by external manipulation of the EN pin. It is used in single-cell Li+ portable applications, wireless handsets, personal digital assistants, digital cameras, self-charging battery packs and cradle chargers. Input voltage range is 4.7V to 22V Operating temperature range from -40°C to 85°C Stand-alone or µP-controlled operation 0.5% voltage set-point accuracy Lowest power dissipation Low 4.7V min input voltage Top-off charging to achieve full battery capacity No inductor required Safely pre-charges near dead cells Automatic power down when input power removed Applications Power Management, Portable Devices Product Information Battery Type: Li-Ion Input Voltage: 22V Battery Charge Voltage: 4.2V Charge Current Max: 2A Battery IC Case Style: SOT-23 No. of Pins: 6Pins No. of Series Cells: 1 Operating Temperature Min: -40°C Operating Temperature Max: 85°C MSL: MSL 1 - Unlimited