Datasheet

VCC
BATDRV
REGN
BTST
HIDRV
PHASE
LODRV
GND
SRP
SRN
Q4
Sis412DN
L1
4.7µH
SYSTEM
C10
10
µF
RSR
10 mW
R1
430 kW
R2
487 kW
C2
0.1µF
U1
bq24725A
C8
10uF
Q3
Sis412DN
C7
0.047µF
Adapter +
RAC 10 mW
Pack +
C6
1µF
HOST
Dig I/O
SMBus
+3.3V
C4
100 pF
R4
R5
R7
549
kW
ACN
ACP
CMSRC
ACDRV
ACDET
ILIM
SDA
SCL
ACOK
IOUT
Din
BAT54A
R9
4.7 W
R3
10 kW
R8
100 kW
R10
4.02 kW
R11
4.02 kW
D1
BAT54
C9
10uF
C11
10 µF
Pack -
C3
0.1µF
C5
1µF
R6
4.02 kW
C1
0.1 µF
Total
Csys
220
µF
Adapter -
ADC
Q1 (ACFET)
FDS6680A
Q2 (RBFET)
FDS6680A
PowerPad
C13
0.1µF
C14
0.1µF
R14
10 W
R15
7.5 W
*
*
C17
2200pF
C16
0.047µF
R12
100 kW
Q5 (BATFET)
Si4435DDY
D2
SL42
10 kW
10 kW
*
*
bq24725A
SLUSAL0 –SEPTEMBER 2011 www.ti.com
F
s
= 750kHz, I
ADPT
= 2.048A, I
CHRG
= 1.984A, I
LIM
= 2.54A, V
CHRG
= 4.200V, 12W adapter and 1S2P battery pack
Use 0Ω for better current sensing accuracy, use 10Ω/7.5Ω resistor for reversely battery connection protection. See
application information about negative output voltage protection for hard shorts on battery to ground or battery
reversely connection.
The total Csys is the total lump sum of system capacitance. It is not required by charger IC. Use Din for reverse input
voltage protection. See application information about reverse input voltage protection.
Figure 3. Typical System Schematic for 5V Input 1S Battery
ORDERING INFORMATION
ORDERING NUMBER
PART NUMBER IC MARKING PACKAGE QUANTITY
(Tape and Reel)
bq24725ARGRR 3000
bq24725A BQ25A 20-PIN 3.5 x 3.5mm
2
QFN
bq24725ARGRT 250
4 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s) :bq24725A