National Instruments LM3647 user manual Li-Ion

2.1.2 Li-Ion

			AN101315-9
Set To:	SEL1	SEL2	SEL3
VCC	After charging, maintenance charging until battery removal.	NA	4.2V/Cell
Hi-Z	After charging, maintenance charging until battery removal. If battery	Li-Ion	NA
	voltage drops below a predefined value, the charger restarts the
	charge-process.
GND	After charging, no maintenance charging is applied. If battery voltage	NA	4.1V/Cell
	drops below a predefined value, the charger restarts the charge-process.

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.

AN-1164

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