Datasheet

www.ti.com
FUNCTIONAL DESCRIPTIONS
BATTERY CHARGER
5
4
6
AC
EN
SW
13
12
ISET2
ISET1
bq25015RHL
PACK+
PACK−
VDC
GND
VBUS
GND
USBPort
AC Adapter
2FB
16BAT/OUT
+
SYSTEM
Battery
Pack
10 µH
17BAT/OUT
USB
STAT2
7
8
STAT1
3
9
VSS
VSS
VSS
18
14
typ_app_lus721
19
15
CE
PG
R1
C
2
C
1 µF
CHG
10kΩ
1.62kΩ
L
OUT
Controland
StatusSignals
R2
10μF
10μF
10kΩ
C
10 µF
OUT
C
1
R =261k
1
Ω
R =100kΩ
C =68pF
C =100pF
2
1
2
bq25015
bq25017
SLUS721A – DECEMBER 2006 – REVISED MARCH 2007
The bq2501x supports a precision Li-Ion or Li-Pol charging system suitable for single-cell battery packs and a
low-power DC-DC converter for providing power to system processor. See a typical charge profile, application
circuit and an operational flow chart in Figure 12 through Figure 14 respectively. Figure 13 is the typical
application circuit for a high-current application (300 mA). Here the battery charge current is 500 mA, input
voltage range of 4.5V – 6.5V.
Figure 12. Typical Charger Profile
Figure 13. Typical Application Circuit
10
Submit Documentation Feedback