1
1
2
2
3
3
4
4
5
5
A A
B B
C C
Date: 7 jun 2012
KiCad E.D.A.
Rev: ASize: A4
Id: 1/1
Title: LTC6802 based slave cell monitor
File: LTC6802-1.sch
Sheet: /
www.go-ev.co.uk
Greg Fordyce
CSBO
1
SDOI
2
SCKO
3
V+
4
C12
5
S12
6
C11
7
S11
8
C10
9
S10
10
S5
20
NC
30
Vmode
40
C9
11
C4
21
Vtemp1
31
SCKI
41
S9
12
S4
22
Vtemp2
32
SDI
42
C8
13
C3
23
Vref
33
SDO
43
S8
14
S3
24
Vreg
34
CSBI
44
C7
15
C2
25
TOS
35
S7
16
S2
26
MMB
36
C6
17
C1
27
WDTB
37
S6
18
S1
28
GPIO1
38
C5
19
V-
29
GPIO2
39
U1
LTC6802-1
-MCLR/VPP/RE3
1
RA0/AN0
2
RA1/AN1
3
RA2/AN2/Vref-/CVref
4
RA3/AN3/Vref+
5
RA4/TOCKI/C1OUT/RCV
6
RA5/AN4/-SS/HLVDIN/C2OUT
7
Vss
8
OSC1/CLKI
9
OSC2/CLKO/RA6
10
VDD
20
RC0/T1OSO/T1CKI
11
RB0/AN12/INT
21
RC1/T1OSI/CCP2
12
RB1/AN10/P1C/C12IN3-
22
RC2/CCP1
13
RB2/AN8/P1B
23
RC3/SCK/SCL
14
RB3/AN9/PGM/C12IN2-
24
RC4/SDI/SDA
15
RB4/AN11/P1D
25
RC5/SDO
16
RB5/AN13/T1G
26
RC6/TX/CK
17
RB6/ICSPCLK
27
RC7/RX/DT
18
RB7/ICSPDAT
28
VSS
19
U***1
PIC16F886
R2
100R
R3
100R
R4
100R
R5
100R
R6
100R
R7
100R
R8
100R
R9
100R
R10
100R
R11
100R
R12
100R
R13
100R
C3 100nf
C4 100nf
C5 100nf
C6 100nf
C7 100nf
C8 100nf
C9 100nf
C10 100nf
C11 100nf
C2 100nf
C12 100nf
C13 100nf
GNDPWR
GNDPWR
GNDPWR
GNDPWR
GNDPWR
GNDPWR
GNDPWR
GNDPWR
GNDPWR
GNDPWR
GNDPWR
1
2
3
4
5
6
7
8
9
10
11
12
13
P1
CELLS
GNDPWR
A
1
K
2
E
3
C
4
U5
TCLT1009
A
1
K
2
E
3
C
4
U4
TCLT1009
A
1
K
2
E
3
C
4
U2
TCLT1009
1
2
3
4
5
P2
ICSP
1
2
3
4
P3
Bus OUT
1
2
3
4
P4
Bus IN
R26
150R
R27
150R
R28
330R
R22
330R
R25
330R
R14
100K
R19
100K
R23
330R
1
2
3
K1
TEMP
R18
5K
R17
5K
R16
3K7
R15
5K
C14
1uf
C17
1uf
C16
1uf
C18 100nf
GNDPWR
GNDPWR GNDPWR
GNDPWR
GNDPWR
GNDPWR
C15
1uf
GNDPWR
R20
330R
R21
1K
1 2
D1
GREEN LED
1 2
D2
RED LED
R24
330R
Input filters
NC
1
A
2
K
3
NC
4
E
5
Vo
6
Vb
7
Vcc
8
U3
6N139
R1
20R
GNDPWR
GNDPWR
C1 100nf
GNDPWR
Connect to 100K thermistors.
(tempco -4%/C)
Vreg can only deliver 4ma.
R15-R18 values sized for 1ma.
16F886 powered from 5 volt
supply on bus connectors.
R26-8 probably won't drive
bus hard enough for reliable comms.
May need to add some transitors
to drive bus harder.
LTC6802 powered from cells.
Allowable range 10 - 60 volts, 4 - 12 cells.
6N139 is high gain opto, chosen because
only 1ma is availible to drive led.
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