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Battery Charger, 1 Cell of Li-Ion battery, 22V input, 4.2V / 2A charge, SOT-23-6Product OverviewThe MAX1736EUT42+T is a single-cell Li+ battery charger for current limitedsupply in 6 pin SOT-23 package. It provides simple, safe, low cost method ofcharging single-cell Li+ battery with nearly no heat generation. Combined withcurrent limited voltage source IC provides precharge, fast-charge andtop-off-charge capabilities. After constant current fast charge, top-off safelyfinishes charging battery by pulse width modulating charge current. The top-offon-time is kept below electrochemical time constant of cell. The key advantageof this method is charge circuit is small and generates minimal heat whileproviding a safe method of charging to ensure maximum cell life. It initiatescharging in one of four ways, battery insertion, charger power-up, batteryvoltage threshold and by external manipulation of the EN pin. It is used insingle-cell Li+ portable applications, wireless handsets, personal digitalassistants, digital cameras, self-charging battery packs and cradle chargers.Input voltage range is 4.7V to 22VOperating temperature range from -40°C to 85°CStand-alone or µP-controlled operation0.5% voltage set-point accuracyLowest power dissipationLow 4.7V min input voltageTop-off charging to achieve full battery capacityNo inductor requiredSafely pre-charges near dead cellsAutomatic power down when input power removedApplicationsPower Management, Portable DevicesProduct InformationBattery Type: Li-IonInput Voltage: 22VBattery Charge Voltage: 4.2VCharge Current Max: 2ABattery IC Case Style: SOT-23No. of Pins: 6PinsNo. of Series Cells: 1Operating Temperature Min: -40°COperating Temperature Max: 85°CMSL: MSL 1 - Unlimited