National Instruments LM3647 - Manual (Page 7)

2.1.2 Li-Ion
Set To: SEL1 SEL2 SEL3
V
CC
After charging, maintenance charging until battery removal. NA 4.2V/Cell
Hi-Z After charging, maintenance charging until battery removal. If battery
voltage drops below a predefined value, the charger restarts the
charge-process. Li-Ion NA
GND After charging, no maintenance charging is applied. If battery voltage
drops below a predefined value, the charger restarts the charge-process. NA 4.1V/Cell
Note: When a three chemistry charger is designed, special considerations must be taken into account regarding configuration pin SEL3. this pin has differnet
meanings when switching between Ni-Cd/Ni-MH and Li-Ion. To ensure correct operation, the SEL3-pin MUST be tied to VCC. If Li-Ion cells of 4.1V/Cells is
used, then minor adjustments have to be done to the voltage measurement resistor divider.
AN101315-9
AN-1
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