Datasheet

RAC
0.010 W
Q1 (ACFET)
N
P
ACN
ACP
ISET2
ACSET
VREF
CE
VFB
TS
VCC
HIDRV
N
PH
BTST
REGN
LODRV
GND
SRP
SRN
P
PACK+
PACK-
SYSTEM
ADAPTER+
ADAPTER-
C4
0.1 µF
C2
0.1 µF
C3 C7
Q4
Q5
C6
L1
D1
BAT54
C5
C10
0.1
µF
TTC
CTTC
VREF
STAT2
Pack
Thermistor
Sense
BATDRV
ACDRV
bq24630
P
Q2 (ACFET)
Q3 (BATFET)
VREF
ISET1
STAT1
VBAT
R9
2.2kW
R10
6.8kW
R1
100
kW
PG
ADAPTER +
Cff
22 pF
0.1 µF
1 µF
C8
10 µF
1 µF
1 µF
RSR
0.010
W
C11
0.1
µF
C12
10 µF*
C13
10 µF*
R2
500kW
R1210kW
R1110
kW
R1310kW
R3
100 kW
R4
32.4 kW
R5
100 kW
R6
10kW
R7
100 kW
R8
22.1 kW
R14
100 kW
C14
0.1 mF
R15
100
kW
C15
0.1
µF
PwrPad
0.11 Fμ
R16
100
W
C1
0.1 Fμ
103AT
SI7617DN
SI7617DN
SIS412DN
SIS412DN
SI7617DN
C9
10 μF
R17
10Ω
R20
2Ω
C16
2.2μF
R18
1kΩ
R19
1kΩ
8.2µH*
D2
D3
D4
bq24630
SLUS894A –JANUARY 2010– REVISED OCTOBER 2011 www.ti.com
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.
DESCRIPTION (CONTINUED)
The bq24630 controls external switches to prevent battery discharge back to the input, connect the adapter to
the system, and connect the battery to the system using 6-V gate drives for better system efficiency. The
bq24630 features dynamic power management (DPM). These features reduce battery charge current when the
input power limit is reached to avoid overloading the ac adapter when supplying the load and the battery charger
simultaneously. A highly-accurate current-sense amplifier enables precise measurement of input current from the
ac adapter to monitor the overall system power.
NOTE: VIN = 19 V, BAT = 3-cell LiFePO
4
, I
adapter_limit
= 4 A, I
charge
= 3 A, I
pre-charge
= 0.125 A, I
term
= 0.3 A, 2.5-h safety timer
Figure 1. Typical System Schematic
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Product Folder Link(s): bq24630