Datasheet

REFERENCE SCHEMATICS
equi
valent
resistance
UsedforSafetyEvents
UsedforDeviceTemp.
T1=CELL1TEMP.
T2=CELL2TEMP.
T3=CELL3TEMP.
TEMP-FET
S=FETTEMP.&USEDFORSAFETY.
TEMP-PCB=TEMP.OFU4
stargroundpointlocatedatR3
K
eepthisconnectiontoBA
TT-asshortandLowZaspossible.
1
CHG
2
DSG
3
PRE
4
EFCIC
5
EFCID
6
CCBAT
7
CCPACK
8
VLDO1
9
CSBAT
10
CSPACK
11
OSCI
12
OSCO
13
SDO0
14
SDI1
15
P1N
16
P2S
17
P2N
18
SDO2
19
SDI3
20
P3S
21
P3N
22
P4S
23
P4N
24
P-LAN
25
RSTN
26
NC
27
NC
28
NC
29
SELECT
30
SPROT
31
LEDEN
32
LED1
33
LED2
34
LED3
35
LED4
36
LED5
37
SMBCLK
38
SMBDA
T
39
V4
40
XT4
41
XT3
42
V3
43
VLDO2
44
V2
45
XT2
46
XT1
47
V1
48
VSS
49
TAB
U4
bq78PL114
C5 10uF
R44
10K
C38
0.1uF
C27
1000pF
C28
10uF
C43
0.1uF
C7
1.0uF
R5
100K
C11
1000pF
R28
4.7K
R27
4.7K
R49
100R
R50
100R
R54
100R
R55
100R
R43
1.0M
R51
1.0M
C40
1.0uF
C39
1.0uF
C41
1.0uF
R10
2K
R30
20K
R29
20K
C12
3300pF
C13
3300pF
Q1-A
FDC6327C
Q1-B
FDC6327C
L1
4.7uH
C30
22uF
D10
MA21D3800L
D9
MA21D3800L
1
2
3
4
SMBUS-PORT
R3
0.005R
R6
1.0M
Z1
5.6VDC
T3
MMBD4148SE
C6
1000pF
TEMP-PCB
MMBD4148SE
C45
1000pF
TEMP-FETS
MMBD4148SE
C46
1000pF
R9
2K
R11
20K
R12
20K
C14
3300pF
C15
3300pF
Q2-A
FDC6327C
Q2-B
FDC6327C
L2
4.7uH
D5
MA21D3800L
D6
MA21D3800L
P
ACK+
PACK
-
D
S
G
Q11
MMBFJ201
Q12
BC846ALT1G
Vcebr=65V
R53
560K
R56
200K
ZR2
12.0VDC
BZT52C12-7-F
R58
30K
R59
1.0M
Q13
D
S
G
Q8
MMBFJ201
Q9
BC846ALT1G
Vcebr=65V
R40
560K
R41
200K
ZR1
12.0VDC
BZT52C12-7-F
R45
30K
R46
1.0M
Q10
C60
0.1uF
C61
0.1uF
Q15
BC846ALT1G
Vcebr=65V
R17
1.0M
R52
30K
R60
1.0M
Q16
R18
C1
22uF
C2
22uF
R19
1.0M
R25
1.0M
D23 D24 D25 D26 D27
S1
C3
1000pF
Q14
BS
S138
C4
0.1uF
Q17
FDV304P
R1
100K
T1
MMBD4148SE
C8
1000pF
T2
MMBD4148SE
C16
1000pF
C42
0.1uF
C50
0.1uF
-
+
CELL1
-
+
CELL2
-
+
CELL3
VSS
VLDO1
VSS
VSS
VSS
VLDO1
VLDO1
S001
bq78PL114
SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009 ................................................................................................................................................ www.ti.com
This configuration applies to the bq78PL114 only. The bq78PL114S12 has a different configuration for three-cell
operation.
Figure 8. bq78PL114 Reference Schematic (3 Series Cells)
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Product Folder Link(s): bq78PL114