BQ24170 Datasheet, PDF (4/35 Pages) Texas Instruments – 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger

bq24170
bq24172
SLUSAD2A – NOVEMBER 2010 – REVISED NOVEMBER 2010
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
TYPICAL APPLICATIONS
12V Adapter
R_IN
2
C_IN
2.2?
VBAT
D2
D1
R1
10
Q1
Q2
R_AC: 10m
C12: 0.1µ
C11: 0.1µ
R11
4.02k
R12
4.02k
C2: 1µ
VREF
R4
100k
R5
22.1k
ACN
ACP
CMSRC
PVCC
BATDRV
VREF
R2
232k
R3
32.4k
ACDRV
VREF
SW
bq24170
ISET
BTST
ACSET
REGN
R6
1000k
R7
100k
R_T
103AT
VREF
R8
5.23k
R9
30.1k
AVCC
C1
1µ
C3: 0.1?
OVPSET
TTC
PGND
SRP
SRN
R10
1.5k
VREF
D3
TS
CELL
THERMAL
STAT _PAD
System
C4: 10µ
R14
Q3
1k
L: 3.3?H _RSR:10m
VBAT
C5
0.047?
C7
0.1?
C6
1?
C8
0.1?
C9, C10
10? 10?
Float
Figure 1. Typical Application Schematic (12V input, 2 cell battery 8.4V, 2A charge current, 0.2A
pre-charge/termination current, 3A DPM current, 18V input OVP, 0 – 45°C TS)
4
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