bq24170
bq24172
www.ti.com
SLUSAD2A –NOVEMBER 2010–REVISED NOVEMBER 2010
Q2
Q1
RAC: 10m
C11: 0.1µ
System
15V Adapter
C12: 0.1µ
RIN
2
C4
10µ
CIN
2.2?
ACN
PVCC
Q3
R14
1k
ACP
R12
4.02k
CMSRC
BATDRV
R11
4.02k
VBAT
ACDRV
VREF
L: 2.2?H
RSR:10m
C2: 1µ
VBAT
SW
D2
D1
R21
100k
VREF
bq24172
C5
0.047?
C8
0.1?
ISET
R4
100k
R22
32.4k
BTST
R20
10
C9, C10
? 10?
C7
0.1?
20
R5
32.4k
ACSET
AVCC
REGN
C6
1?
C1
1µ
R6
499k
PGND
OVPSET
SRP
SRN
Battery LEARN
R7
49.9k
C3: 0.1?
VREF
TTC
TS
R2
499k
R8
5.23k
VREF
LEARN
R17
49.9k
R20
599k
FB
FB
R9
30.1k
R10
1.5k
RT
103AT
THERMAL
PAD
R1
100k
R21
499k
STAT
VREF
D3
Figure 2. Typical Application Schematic with Battery Learn Function (15V input, 3 cell battery 12.6V, 4A
charge current, 0.4A pre-charge/termination current, 4A DPM current, 0 – 45°C TS)
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