BQ24004 Datasheet, PDF (12/22 Pages) Texas Instruments – TWO-CELL Li-ION CHARGE MANAGEMENT IC FOR PDAs AND INTERNET APPLIANCES

bq24004
bq24005
bq24006
SLUS476B – DECEMBER 2000 – REVISED MAY 2002
www.ti.com
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.
Regulation Voltage
V(OUT)
Preconditioning
Phase
Current Regulation
Phase
Voltage Regulation and
Charge Termination Phase
Regulation Current
I(lim)
Minimum Charge
Voltage V(LOWV)
Charge Voltage
Preconditioning
Current I(PRECHG)
Taper Detect
Charge Current
22.5 Minutes
22.5 Minutes
Charge Timer (3, 4.5 or 6 Hours)
Figure 14. Typical Charge Profile
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