• ADP2291ARMZ-R7
  • ADP2291ARMZ-R7
  • ADP2291ARMZ-R7
  • ADP2291ARMZ-R7
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The ADP2291 is a constant-current/constant-voltage linear charger for a single cell lithium ion battery, requiring just a few components to provide a simple and safe charging system that operates from a wide 4.5 V to 12 V input voltage range. It features an internally controlled, multistep charging cycle that improves battery life. An external, low cost, PNP provides the charging current to the battery and an external resistor sets the maximum charge current. A small external capacitor programs the maximum charge time. The controller includes an LED driver to indicate the battery charging status. Safety features include charging stop mode for battery faults, output overshoot protection, and thermal shutdown. The ADP2291 also features automatic reverse isolation, which does not require an additional blocking diode. The multistep charge cycle optimizes the battery charging time in a safe manner. It features a trickle charge mode for a deeply discharged cell and a fast charging mode with a maximum current of 1.5 A. The ADP2291 controls the end of charge with a 4.2 V output voltage that is 1% accurate over line and temp-erature. It automatically recharges the battery if the cell voltage drops. When the input supply is removed, the part enters a low current state and reduces the current drawn from the battery to below 1 µA. The ADP2291 is available in both a small, 8-pin MSOP package and a 3 × 3 mm LFCSP package that is ideally suited for small, portable applications.

supply_voltage_dc12.0 V (max)
case_packageMSOP
rohs_statusCompliant
reach_svhc_complianceNo SVHC
lead_free_statusContains Lead
mounting_styleSurface Mount
packagingCut Tape (CT)
input_voltage_dc12.0 V
lifecycle_statusActive
pin_count8
Battery TypeLi-Ion
Input Voltage12V
Battery Charge Voltage4.2V
Charge Current Max1.5A
Battery IC Case StyleMSOP
No. of Pins8
No. of Series Cells1
Operating Temperature Min-40°C
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