Product Summary
The MAX846AEEE-T is a cost-saving multichemistry batterycharger system that comes in a space-saving 16-pin QSOP. This integrated system allows different battery chemistries (Li-Ion, NiMH or NiCd cells) to be charged using one circuit. In its simplest application, the MAX846AEEE-T is a standalone, current-limited float voltage source that charges Li-Ion cells. It can also be paired up with a low-cost microcontroller (μC) to build a universal charger capable of charging Li-Ion, NiMH, and NiCd cells. An internal 0.5%-accurate reference allows safe charging of Li-Ion cells that require tight voltage accuracy. The MAX846AEEE-T voltage- and current-regulation loops used to control a low-cost external PNP transistor (or P-channel MOSFET) are independent of each other, allowing more flexibility in the charging algorithms.
Parametrics
MAX846AEEE-T absolute maximum ratings: (1)DCIN, DRV, CS+, CS-, BATT to GND: -0.3V, +21V; (2)PGND to GND: ±0.3V; (3)VL to GND: -0.3V, 7V; (4)IPWROK: 10mA; (5)PWROK, ISET, CCI, CCV, OFFV, VSET, CELL2, ON to GND : -0.3V, VL + 0.3V; (6)CS+ to CS-: ±0.3V; (7)VL Short to GND: Continuous; (8)IDRV: 100mA.
Features
MAX846AEEE-T features: (1)Space-Saving 16-Pin QSOP; (2)Charging-Current-Monitor Output; (3)<1uA Battery Drain when Off; (4)Multichemistry Charger System (Li-Ion, NiMH, NiCd); (5)Independent Voltage and Current Loops; (6)±0.5% Internal Reference for Li-Ion Cells.
Diagrams
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