bq24007
bq24008
SLUS479D 鈭?JANUARY 2001 鈭?REVISED NOVEMBER 2004
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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 13 for a typical charge profile and Figures 14 and 15 for an operational flowchart.
Preconditioning
Phase
Current Regulation
Phase
Voltage Regulation and
Charge Termination Phase
Regulation Voltage
V(OUT)
Regulation Current
I(lim)
Charge Voltage
Minimum Charge
Voltage V(LOWV)
Preconditioning
Current I(PRECHG)
Taper Detect
Charge Current
22.5 Minutes
22.5 Minutes
Charge Timer (3, 4.5 or 6 Hours)
Figure 13. Typical Charge Profile
12