Datasheet

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SLUS462E − SEPTEMBER 2000 − REVISED NOVEMBER 2004
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12
APPLICATION INFORMATION
FUNCTIONAL DESCRIPTION
The bq2400x supports a precision current- and voltage-regulated Li-Ion charging system suitable for cells with either coke
or graphite anodes. See Figure 14 for a typical charge profile and Figure 15 for an operational flowchart.
Preconditioning
Phase
Regulation Voltage
(V
OUT
)
Current Regulation
Phase
Voltage Regulation and
Charge TerminationPhase
Regulation Current
(I
lim
)
Minimum Charge
Voltage (LowV)
Preconditioning
Current (I
PRECHG
)
Charge Voltage
Charge Current
22.5 Minutes
22.5 Minutes
Charge Timer (3, 4.5 or 6 Hours)
Taper Detect
Figure 14. Typical Charge Profile