DC1924A - Schematic

6
5
4
3
2
1
4
4
C44
4.7µF
100V
1812
M2
R58
2
TG1
PGND
C48
4.7µF
100V
1812
C49
4.7µF
100V
1812
C68
OPT.
C69
OPT.
4
4
4
M2-1
R59
OPT.
BG2
BG1
TG1
R41
2
R40
0.010
1225 Wide
TP13
AGND
TG2
R51
2
R60
OPT.
TP4
PGND
3
1
SRVO_FBOUT
D6
2
1
D5
2
SRVO_IOUT
1
R42
549
R43
549
R45
549
R44
549
R16
10K
31
30
TP15
SRVO_FBIN
TP16
SRVO_IIN
6
25
26
27
28
36
10
TP17
SRVO_IOUT
TP18
SRVO_FBOUT
PGND
VC
SRVO_IIN
2
2
TG2
BOOST2
SW2
BG2
CSN
CSP
BG1
SW1
R27
100K
R13
392K
20
24
D4
1
D3
18
19
17
16
2
3
14
21
23
BOOST1
TG1
GATEVCC
GATEVCC
IMONOUT
15
INTVCC
IMONIN
35
R54
OPT.
FBOUT
SRVO_FBIN
SRVO_IIN
SRVO_IOUT
SRVO_FBOUT
SWEN
CLKOUT
FBIN
RT
0
CSNOUT
AGND
R55
5
N/C
N/C
CSPOUT
#SHDN
SYNC
LDO33
FBIN
C14
1nF
VIN
SS
1
LDO33
34
CSPIN
MODE
R11
71.5K
CSNIN
EXTVCC
33
22
U1
LT8705EUHF
32
LDO33
OPT.
C15
1nF
SRVO_FBIN
2
2
1
D2
C13
0.22µF
CMMR1U-02
R9
10
1
D1
R8
10
C47
0.22µF
C12
R53
OPT.
+ C64
220µF
100V
M4-1
OPT.
4
M3-1
OPT
4
R39
0
CMMR1U-02
4.02
R14
20K
+ C55
220µF
100V
C51
4.7µF
100V
1812
R62
GATEVCC
3
C46
1.0µF
100V
0805
C50
4.7µF
100V
1812
8
7
6
5
1
2
3
4
OPT.
R38
2
TP5
/SHDN
C71
OPT.
C70
OPT.
TG2
1
2
3
M1-1
OPT
TP12
AGND
TP2
VOUT
48V / 5A
VOUT
0.007
2512
R22
0
M3
BSC039N06NS
BSC123N08NS3 G
8
7
6
5
TP3
R57
7
6
5
8
7
6
5
C43
4.7µF
100V
1812
1
2
3
C54
OPT.
C53
OPT.
C67
OPT.
1
2
3
C66
OPT.
5
6
7
8
8
7
6
5
C42
4.7µF
100V
1812
3
2
1
C41
4.7µF
100V
1812
1
2
3
22µH
5
6
7
8
+ C45
220µF
100V
L1
1
2
3
4
+ C52
220µF
100V
8
7
6
5
0
2512
M4
BSC039N06NS 8
4
R56
VIN
36V to 80V
3
2
1
TP1
M1
BSC123N08NS3 G
TP19
SWEN
TP10
MODE
JP1
1
FCM
2
BURST
SEE NOTE 3
VOUT
3
DCM
4
8
39
7
2
TP14
CLKOUT
EXTVCC
C65
1.0µF
100V
0805
C61
R49
24.3K 0.1uF
R47
210K
C59
1µF
C58
4.7µF
R50
56.2K
R46
100K
TP20
EXTVCC
LDO33
TP8
LDO33
38
12
13
11
9
4
C56
4.7µF
37
C57
4.7µF
29
2
R48
0
C60
OPT.
C62
220pF
25V
C63
3300pF
25V
TP9
SS
TP11
SYNC
1
CUSTOMER NOTICE
NOTES (UNLESS OTHERWISE SPECIFIED):
____________________________
1- ALL SMD CAPACITORS ARE 16V.
2- ALL SMD CAPACITORS AND RESISTORS ARE 0603.
3- CUT TRACE TO DISCONNECT EXTVCC FROM VOUT
AND SUPPLY EXTVCC THROUGH TP20.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
6
5
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES. S. M.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG. MEHDI A.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
4
3
TECHNOLOGY
TITLE: SCHEMATIC
80V / 48V Synchronous Buck-Boost Controller
SIZE
N/A
SCALE = NONE
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
LT8705EUHF
REV.
2
DEMO CIRCUIT 1924A
Wednesday, July 02, 2014
SHEET 1
1
OF 2
1
A
B
C
D
E
4
4
BOARD STANDOFF HARDWARE
MH1
3
MH2
3
NYLON STACKING SPACER #4 0.5" NYLON STACKING SPACER #4 0.5"
MH3
MH4
NYLON STACKING SPACER #4 0.5" NYLON STACKING SPACER #4 0.5"
2
2
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. S. M.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG. MEHDI A.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
1
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
A
B
TECHNOLOGY
TITLE: SCHEMATIC
80V / 48V Synchronous Buck-Boost Controller
SIZE
N/A
SCALE = NONE
C
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
REV.
LT8705EUHF
2
DEMO CIRCUIT 1924A
Friday, July 11, 2014
D
SHEET 2
E
OF 2
1
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