BQ3050 Datasheet, PDF (3/28 Pages) Texas Instruments – 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

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TYPICAL IMPLEMENTATION
bq3050
SLUSA92A – JANUARY 2011 – REVISED JUNE 2011
VLED
220 kΩ
0.1 μF
20 kΩ
1 kΩ
CD
VH
0.22 μF
OUT
2^nd
VM
Level
Protector
VDD
VL
0.1 μF
GND
VB
1 kΩ
0.1 μF
1 kΩ
0.1 μF
1 kΩ
0.1 μF
1 kΩ
0.1 μF
0.1 μF 0.1 μF
300 Ω
3 MΩ
20 kΩ
3 MΩ
5.1 kΩ
10 kΩ
10 kΩ
PACK +
0.1 μF
0.1 μF
BAT
1 μF
VC1
100 Ω
VC2
100 Ω
VC3
100 Ω
VC4
100 Ω
TEST
FUSE Control
Internal PCHG
FET
High Side
N-CH FET Drive
LED
Drive
Cell Balancing
AFE H/W Control
Watchdog
SHA-1
Authentication
Cell Voltage Mux/
Translation
CEDV Gauging
Voltage
Measurement
Overvoltage/
Undervoltage
Protection
Coulomb
Counting
Overcurrent
Protection
H/W Overcurrent/
Shortcircuit
Protection
Overtemperature
Protection
Temperature
Measurement
10 kΩ
VSS
SRP
SRN
0.1 μF
100 Ω
0.1 μF
5 mΩ
0.1 μF
100 Ω
Charging
Algorithms
System Control
2.5V LDO
3.3V LDO
SMBus 1.1
GPOD
RBI
0.1 μF
REG25
1 μF
REG33
1 μF
SMBD
SMBC
DISP
PRES
100 Ω
5.6 V
200 Ω
200 Ω
1 kΩ
0.1 nF
100 Ω
100 Ω
0.1 nF
SMBD
SMBC
DISP
PRES
PACK-
Figure 1. bq3050 Implementation
Copyright © 2011, Texas Instruments Incorporated
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