Datasheet
VSS
VSS
HEATER_CNTL
PACK+
2P
1P
1N
3P
4P
PACK -
SMBD
Pack voltage range
Pack+ to Pack-
6V - 25V
SMBC
SYS PRES
Typical
cell
voltage
3V to
4.2V per
cell
Maximum output current 7A continuous
C1
0.1uF
C2
0.1uF
TP2
2.5V Vcc
C4
0.1uF
R10 1K
R8
1K
R7
1K
R13
100
C12 0.1uF
C13
0.1uF
C16
0.1uF
C18
0.1uF
C15
0.1uF
C28 0.1uF
SW1
D11
BAS16
R20
1M
R25
8.45K
R41
1M
R36
1M
R37
1M
R16
220K
D2
BAS16
TP3
FUSE
1
2
TB4
1
2
3
TB7
R1
100
R2
100
R4
100
R9
1K
R6
1K
C19
4.7uF
R12
100
R18
3.01M
R19
5.1K
R26
61.9K
C23
0.1uF
R27
3.01M
R22
5.1K
C25
0.47uF
RT1
10K
RT2
10K
R31
1K
R32
100
D3 BAS16
C26
0.1uF
C27
0.1uF
GND SIDE
G4
1
2
3
TB5
1
2
3
TB6
1
2
3
TB3
1
2
3
4
J1
TP1
GND
C3
0.1uF
C5
0.1uF
1
2
3
TB2
D9
GREEN
D8
GREEN
C14 1.0uF
C10
1.0uF
D1 BAS16
C8
0.1uF
C11
0.22uF
C6
0.1uF
R40
220K
C20
0.1uF
R21
5.1K
R28 100K
C21
1.0uF
Q2
FDS8817NZ
Q4
FDS8817NZ
R29
8.45K
D5
5.6V
R33 100
R38
100
GND SIDE
G2
GND SIDE
G3
C29
0.22uF
C17
0.1uF
R23
100K
R14
5.1K
R15
220K
R35
1K
R24 100K
R3
100
R5
100
1
2
TB1
D10
GREEN
D6
GREEN
D7
GREEN
1
OUT
2
VDD
3
CD
4
VD4
5
GND
6
VC3
7
VC2
8
VC1
U1
BQ29412DCT
C7
0.1uF
C9
0.1uF
C22
0.47uF
C24
0.1uF
R17
300
1W
Q3
FDS4435BZ
R30
61.9K
R34 100
R39 100
Q6
FDS8817NZ
GND SIDE
G1
D4
5.6V
R42 1K
R11
.010 ohm
Q1
NDS331N
Q5
BSS138
1
DSG
2
PACK
3
VCC
4
ZVCHG
5
GPOD
6
PMS
7
VSS
8
LEDOUT
9
TOUT
10
VCELL+
11
ALERT
12
NC
13
TS1
14
TS2
15
PRES
16
PFIN
17
SAFE
18
SMBD
19
NC
20
SMBC
21
DISP
22
VSS
23
LED1
24
LED2
25
LED3
26
LED4
27
LED5
28
GSRP
29
GSRN
30
MRST
31
VSS
32
REG
33
RBI
34
VSS
35
RESET
36
ASRN
37
ASRP
38
VC5
39
VC4
40
VC3
41
VC2
42
VC1
43
BAT
44
CHG
U2
BQ20Z655DBT / BQ34Z651DBT (Note 1)
CE
2_5V
LED5
LED4
LED1LED2LED3
CE
LED1
COMMON
LED3
2_5V
LED4
COMMON
2_5V
LED2
2_5V
LED5
www.ti.com
Circuit Module Physical Layouts and Bill of Materials
Figure 6. Schematic
7
SLUU697– November 2011 bq20z655EVM and bq34z651EVM SBS 1.1 Impedance Track
Technology-Enabled Evaluation Module
Submit Documentation Feedback
Copyright © 2011, Texas Instruments Incorporated