DC2435A - Schematic

1
2
3
4
5
6
7
8
REVISION HISTORY
ECO
REV
-
2
DESCRIPTION
PRODUCTION
DATE
APPROVED
12/10/15
DL
INTVCC
INTVCC
MODE
E7
CLKIN
INTVCC
A
2
FCM
3
4
PS/SYNC
5
6
BURST
R94
OPT
E8
R48
100K
1
C62
1nF
A
JP3
FREQ
U1
LTC7813EUH
R72
37.4K
R109 OPT
INTVCC
R92 90.9k
10
9
PLLIN/MODE
DRVSET
22
R105 0
FREQ
INTVCC
DRVUV
*
6
VFB1
ILIM
18
R78
R79
VBUS
*
ITH1
5
C44
4.7nF
B
R35
C53
VBIAS
Q1
BSC123N08NS
ITH2
20
TG1
ITH2
BOOST1
SW1
27nF
SENSE1+
SS1
0
R37
OPT
C47
0.1uF
INTVCC
R46
100K
E12
PGOOD1
SS2
3
23
14
SENSE1-
EXTVCC
BOOST2
1
ON
C60
OPT
INTVCC
3
R107
OPT
JP2
TG2
SENSE2-
1nF
R80
0
1nF
S1-
4
R39
0
J3
0.008
COUT4
2.2uF
100V
1206
+
COUT5
68uF
35V
+
28
BOOST2
30
SW2
29
TG2
27
BG2
BG2
GND
1. ALL RESISTORS AND CAPACITORS ARE 0603.
1
2
VBUS
VBUS
R96
VBUS
C4
0.1uF
Q21
BSC026N08NS
C7
OPT
0805
C1
OPT
1210
C2
OPT
1210
C3
OPT
1210
C6
OPT
1210
C5
2.2uF
100V
1206
COUT6
4.7uF
100V
1210
COUT8
4.7uF
100V
1210
+ COUT1
33uF
63V
+ COUT2
100uF
63V
R33
11.5K
9.76K
63.4K
R35
7.5K
7.5K
4.99K
GND
J6
C
GND
E1
VL2-
L2
C63
RS2
VIN
*
J1
VSW2
OPT
Q22
BSC072N08NS
R81
100
15uH
R82
OPT
CIN2
4.7uF
100V
1210
RS3
OPT
4
CIN3
4.7uF
100V
1210
CIN4
4.7uF
100V
1210
CIN5
OPT
1210
+
CIN1
33uF
63V
J2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
R101 R102 RS2
L1
OPT
0
6m 22uH
OPT
0
6m 22uH
0
OPT 10m 10uH
4
VIN
GND
VINE2
APPROVALS
PCB DES.
LT
APP ENG.
DL
TECHNOLOGY
6
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
WIDE INPUT SYNCHRONOUS STEP UP/DOWN SUPPLY
SIZE
5
VIN+
4V -56V
C57
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
E6
4
OPT
R79
14.7K
21K
17.4K
*
E5
CUSTOMER NOTICE
VBUS
28V
20V
24V
*
GND
25
D
ASSY VOUT1
‐A
24V/5A
‐B
28V
‐C
5V/8A
VOUT1
C36
OPT
1206
J4
E4
0
NOTE: UNLESS OTHERWISE SPECIFIED
COUT11
68uF
35V
R40
0
1
2
3
R108
*
VOUT1
RS1
13
C56
C64
4.7uF
2
OFF
E3
VOUT1
Q2
BSC042NE7NS
S2-
VIN
INTVCC 15
RUN2
RUN2
SW2
VPRG2
R111
OPT
JP1
VL1-
VSW1
0
RUN2
GND
B
SHT 2
C78
OPT
0805
L1 *
S1+
RUN1
SENSE2+
4
VIN
11
E11
8
C79
OPT
0805
C59
OPT
1210
J5
PGND
3
7
VBUS_
C51
OPT
16V
0805
PGOOD1
S2+ 12
2
OFF
BG2
2010
BG1
SS2
INTVCC
ON
RUN2 17
R110
OPT
BG1
SHT 2
*
C21
0.1uF
C15
33
1
C
C77
OPT
TG2
VIN
R101
4
R95
1
31
EXTVCC
RUN1 16
VIN
BOOST1
TRK/SS1
E10
RUN1
TG1
32
C52
0.1uF
RUN1
S2-
TG1
1
2
3
R34
2
0
BG1
E9
R102
*
2010
4.7uF
0.1uF
R75
3.6K
C54
TRACK / SS1
C17
26
ITH1
*
820pF
S1-
24
VBIAS
68pF
VL2-
SHT 2
C81
DRVCC
C43
S2+
VL1-
INTVCC
R104 OPT
332K
0
0
VFB2
5
6
7
8
VOUT1
R70
VSW2
S1+
R103 0
1
2
3
VBUS
19
VFB2
VSW1
VFB1
5
6
7
8
R36
OPT
5
6
7
8
C49
47pF
C55
5
6
7
8
R43
332K
R106 OPT
1
2
3
R33
21
IC NO.
N/A
SCALE = NONE
DATE:
LTC7813EUH
DEMO CIRCUIT 2435A
SHEET 1
Thursday, December 10, 2015
7
8
REV.
2
OF 2
D
OPTIONAL DCR SENSING
NOTE:
WHEN DCR SENSING IS IMPLEMENTED,SHORT RS1 & RS2.
REMOVE R30, R29, R80 & R81.STUFF R62 AND R91 WITH 0 OHMS.
CALCULATE R51, R53 & C15 AND R89, R90 & C56 PER THE DATA SHEET.
ALSO REFER TO QSG FOR EXAMPLE.
SHT 1
VSW1
R51
VSW1
S1+
OPT
SHT 1
S1+ SHT 1
SHT 1 VSW2
R89
VSW2
OPT
R53
OPT
R62
S1-
S1-
S2-
VL1-
VL1- SHT 1
S2- SHT 1
R90
OPT
R91
S2+
SHT 1 S2+
VL2-
VL2- SHT 1
OPT
OPT
VIN
EXTVCC
E14
R93
EXTVCC
D4
OPT
2
L3
VOUT1
R55
OPT
SGND
C66
OPT
0805
1
R85
OPT
E13
OPT
R86
C61
1uF
J9
VIN_EMI
VIN VBUS
VBIAS
OPT
C65
R100
OPT
0805
OPT
C67
OPT
0805
C68
OPT
1210
J10
GND
2.2
VBUS
VBUS
VSW1
SHT 1
BG1
BG1
4
SHT 1
TG2
SHT 1
VSW2
SHT 1
BG2
VSW2
Q18
OPT
CUSTOMER NOTICE
BG2
4
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.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
LT
DL
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
WIDE INPUT SYNCHRONOUS STEP UP/DOWN SUPPLY
N/A
SCALE = NONE
Q11
OPT
TITLE: SCHEMATIC
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
VSW1
1
2
3
SHT 1
4
TG2
1
2
3
C74
OPT
0805
D3
OPT
4
TG1
5
6
7
8
C73
OPT
0805
Q9
OPT
1
2
3
C40
OPT
0805
TG1
5
6
7
8
C39
OPT
0805
SHT 1
1
2
3
VIN
5
6
7
8
Q19
OPT
C80
4.7uF
100V
1210
1
VBUS_
5
6
7
8
SHT 1
DATE:
IC NO.
LTC7813EUH
DEMO CIRCUIT 2435A
Thursday, December 10, 2015
SHEET 2
REV.
2
OF 2
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