BQ24616 Datasheet, PDF (2/34 Pages) Texas Instruments – JEITA Guideline Compatible Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with System Power Selector and Low Iq

bq24616
SLUSA49A – APRIL 2010 – REVISED MAY 2010
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This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
DESCRIPTION (CONTINUED)
The bq24616 controls external switches to prevent battery discharge back to the input and to connect the battery
to the system using 6-V gate drives for system efficiency. The bq24616 features Dynamic Power Management
(DPM). The DPM reduces battery charge current when the input power limit is reached to avoid overloading the
AC adapter while 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.
TYPICAL APPLICATION
ADAPTER+
ADAPTER-
Q1 (ACFET)
SI7617DN
P
R20
2Ω R14
100 kW _C14
C16
0.1 mF
2.2μF
VREF
P
RAC
0.010 W
Q2 (ACFET)
SI7617DN
C2
0.1 µF
C3
0.1 µF
R3
100 kW
R5
100 kW
R7
100 kW
R18
1 kΩ
R4
32.4 kW
R6
10 kW
R8
22.1 kW
C4
1 µF
R11 10 kW
D2
ADAPTER +
Pack
Thermistor
Sense
103AT
VREF
R9
2.2 kW
R10
6.8 kW
R12 10 kW
R13 10 kW
R16
100 W
D3
D4
C1
0.1 μF
R17
10Ω
ACN
VCC
ACP
ACDRV
BATDRV
ISET1
ISET2
HIDRV
PH
BTST
ACSET
REGN
VREF
CE
bq24616
LODRV
GND
STAT1
STAT2
SRP
SRN
PG
VFB
TTC
TS
PwrPad
C8
10 µF
C7
1µF
R19
1 kΩ
C6
D1 0.1 µF
BAT54
C5
1 µF
C9
10 μF
SYSTEM
C15
0.1 µF
R15
100 kW
P
Q4
SIS412DN
L1
6.8 µH*
RSR
0.010 W
Q3 (BATFET)
SI7617DN
VBAT
PACK+
PACK-
Q5
SIS412DN
C10
0.1 µF
C12 C13
10 µF* 10 µF*
C11
0.1 µF
R2
500 kΩ
Cff
22 pF
R1
100 kW
C TTC
0.056 μF
VIN=19V; 3-cell; I_{adapter_limit}=4A; I_pre-charge= I_term=0.3A; 5 hour safety timer; I_charge=1.5A (0-10°C), 3A (10-60°C);
V_BAT=12.6V (0-45°C), 12.3V (45-50°C), 12.15V (50-60°C).
Figure 1. Typical System Schematic
PART NUMBER
bq24616
IC MARKING
QTJ
ORDERING INFORMATION
PACKAGE
ORDERING NUMBER
(Tape and Reel)
24-PIN 4×4 mm² QFN
bq24616RGER
bq24616RGET
QUANTITY
3000
250
2
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