Datasheet

U1
N/C N/C
1 20
IN OUT
2 19
IN OUT
3 18
VCC VSENSE
4 17
ISNS AGND
5 16
N/C STAT2
6 15
APG/THM STAT1
7 14
VSEL CR
9 12
EN TMR SEL
8 13
GND N/C
10 11
V
CC
C2
0.1 µF
R1
0.1 Ω
C1
10 µF
+
DC-
DC+
V
CC
bq24005PWP
TEMP
PACK+
PACK-
R2
18.7 kΩ
C3
0.22 µF
+
-
C4
1 µF
Battery
Pack
R4
500 Ω
D1
V
CC
R5
500 Ω
D2
R3
95.3 kΩ
bq24004
bq24005
bq24006
SLUS476F –DECEMBER 2000–REVISED MAY 2012 www.ti.com
APPLICATION INFORMATION
Figure 13. Li-ION/Li-POL Charger
• If the TMR SEL pin is left floating (3 HR time), a 10-pF capacitor should be installed between TMR SEL and
CR.
• If a micro process is monitoring the STAT pins, it may be necessary to add some hysteresis into the feedback
to prevent the STAT pins from cycling while crossing the taper detect threshold (usually less than one half
second). See SLUU083 EVM or SLUU113 EVM for additional resistors used for the STAT pins.
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.
10 Submit Documentation Feedback Copyright © 2000–2012, Texas Instruments Incorporated
Product Folder Link(s): bq24004 bq24005 bq24006