The ADP3801 and ADP3802 are complete battery chargingICs. The devices combine a high accuracy final battery voltagecontrol with a constant charge current control and an on-boardLow Drop-Out Regulator (LDO). The accuracy of the finalbattery voltage control is guaranteed to ±0.75% to safely chargeLi-Ion batteries. An internal multiplexer allows the alternatecharging of two separate battery stacks. The final voltage is pinprogrammable to one of three Li-Ion options: 4.2 V (one Li-Ioncell), 8.4 V (two Li-Ion cells), or 12.6 V (three Li-Ion cells).Paired with an external microcontroller for charge termination,the ADP3801/ADP3802 works as a fast charger for NiCad/NiMH batteries or as a universal charger for all three batterychemistries. In addition, a pin is provided for changing the finalbattery voltage by up to ±10% to adjust for variations in batterychemistry from different Li-Ion manufacturers without loss ofaccuracy in the final battery voltage.
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