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| BQ24171_15 Datasheet, PDF (28/39 Pages) Texas Instruments – bq24171 JEITA-Compliant Stand-Alone, Switched-Mode Li-Ion and Li-Polymer Battery Charger With Integrated MOSFETs and Power Path Selector | |||
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bq24171
SLUSAF2C â FEBRUARY 2011 â REVISED APRIL 2015
10.2.3 Application Curves
96%
94%
92%
90%
88%
86%
84%
82%
80%
0
VIN=12 V, 2 S
0.5 1 1.5 2 2.5 3 3.5 4
IOUT (A)
D001
Figure 22. Charge Efficiency
10.3 System Examples
5-V Adapter
www.ti.com
System
ACN
ACP
CMSRC
PVCC
BATDRV
ACDRV
1µ VREF
VREF
VREF
SW
Selectable
current limit
R4
100k
bq24171
ISET
R11
5
R5B
12.1k
ILIM_500mA
R5A
12.1k
ACSET
BTST
REGN
R6
400k
R7
100k
RT
103AT
VREF
R8
2.2k
R9
6.8k
C1 AVCC
1µ
OVPSET
TTC
PGND
SRP
SRN
R10
1.5k
VREF
D3
TS
FB
THERMAL
STAT PAD
4.7µ
3.3mH RSR: 20m VBAT
0.047m
D1 0.1m
Optional
1m
0.1m
10m10m
R2
100k
R1
100k
USB with input OVP 8 V, selectable charge current limit of 900 mA or 500 mA, system connected after sense resistor
Figure 23. Typical Application Schematic With Single-Cell Unremovable Battery
28
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