DC543A - Schematic

1
2
3
4
5
6
7
8
Jumpers Select
R2
12
Ref.
Normal
JP8
Short Pin 1,3
Short Pin 2,4
Damped
JP9
Short Pin 1,3
Short Pin 2,4
C1
1000pF
R4
12
R5
optional
AUXOUT+
1
E1
E16
1
A
R6
optional
C40
0.01uF
FLTCPL
R9
10K
D1
BAT54C
C2
1uF
R7
5.1
R8
10
C43
optional
3
2
3
C7
1000pF
1
E17
1
9
E7
1
10
3.3Vout
11
12
E8
1
13
14
R17
47k
C26
C27
C18
C28
0.1uF 6800pF 0.1uF 100pF
R18
5k
C29
C30
6800pF 100pF
EXTVCC
ITH1
INTVCC
SGND
PGND
3.3VOUT
BG2
ITH2
BOOST2
VOSENSE2
SW2
SENSE2-
TG2
SENSE2+
RUN/SS2
5
6
7
8
2
3
4
C17 +
2.2uF
C16
22uF
6V
3216
20
1
2
1
1
Q4
IRF7811
4
Vo1+
B
5
6
7
8
5
6
7
8
Q3
IRF7811
4
22
21
J4
D4
MBRS340T3
Q5
optional
4
R13
0.003
+
C13 +
470uF
6.3V
C14 +
470uF
6.3V
C15
470uF
6.3V
Vo1-
19
18
Q6
IRF7807
4
C19
0.47uF
17
J3
Q7
IRF7807
4
L2
1.6uH
SUMIDA
CEPH149-1R6MC
16
R14
0.003
VO2+
Vo2+
15
1
Q8
IRF7811
4
Q9
IRF7811
4
D5
MBRS340T3
Q10
optional
4
J5
R15
optional
+
C22 +
470uF
6.3V
C23 +
470uF
6.3V
C24
470uF
6.3V
R20
0
C36
10uF
10V
CER
Vo2-
1
C
C35
10uF
10V
CER
1
C20
0.1uF
E9
Vin-
VO1+
2
23
C21
1uF
C25
1400pF
1
2
3
1
2
3
24
1
2
3
R16
47k
BG1
FCB
C11
56uF
25V
+
1
8
Ith1
STBYMD
25
2
7
VIN
C10
56uF
25V
J2
1
2
3
6
BOOST1
FREQSET
+
R12
optional
5
6
7
8
1
VOSENSE1
C44
56uF
25V
1
26
1
2
3
C39
0.01uF
E6
SW1
+
C12
0.47uF
27
1
2
3
C38
0.01uF
SENSE1-
28
J1
C9
1uF
5
6
7
8
5
TG1
5
6
7
8
4
FREQ
FLTCPL
SENSE1+
1
2
3
1
B
RUN/SS1
L1
1.6uH
SUMIDA
CEPH149-1R6MC
C37
1uF
Q2
IRF7807
4
5
6
7
8
3
E5
Q1
IRF7807
4
1
2
3
2
5
6
7
8
JP3
Vin+
5
6
7
8
1
1
D3
BAT54A
1
2
1
AUXOUT-
1
2
0
U2
LTC1628CG
RUN1
D2
BAT54
1
2
3
JP2
JP6
Ith2
0
1
1
E4
INTVCC
0
3
1
1
2
JP1
1
FCB
INTVCC
C6
1uF
5
6
7
8
2
0
R10
4.3K
1
E3
C8
0.01uF
C5
1uF
C4
0.1uF
1
2
3
INTVCC
R1
1M
3
3
STBYMD
C3
1.5uF
35V
3216
3
+
1
3
E2
A
1
SGND
C31
1400pF
R23
1.58k
E10
C32
1000pF
1
C
R25
12
C42
1uF
SGND
J6
R22
12
R26
10
E11
R27
1.58k
1
R28
optional
SGND
C34
1400pF
SGND
R31
optional
E12
R32
10
1
SENSE2+
C33
1400pF
C41
1uF
R30
8.3k
E13
R11
1.52K
1
SENSE1+
C59
.33uF
JP8
1
3
R19
1.52K
2
4
HEADER 2X2
IN1
C60
.33uF
JP9
1
3
1
E19
2
4
IN2
HEADER 2X2
1
R21
100
E14
1
E20
0
+
C45 +
C46 +
C47 +
C48 +
C49 +
C50 +
C51
RS1
16.7K
.1%
1
4
1
1
Vo2+
EXTVcc
+
C52 +
C53 +
C54 +
C55 +
C56 +
C57 +
C58
RS2
15.2K
.1%
RS1
IM2
RS2
IN1
6
E18
IN2
5
C61
0.1uF
7
3
2
U1
LTC2920-2CMS8
D
1
2
0
SW2
1
2
LINEAR TECHNOLOGY CORPORATION
1630 McCARTH
Y BLVD.
MILPITAS, CA95035
(408) 432-1900
(408) 434-0507 FAX
Title
LTC2920 With Dual DC to DC Converter
0
SW1
Size
Document Number
1
1
IM1
3
R3
1M
1
E15
3
3
JP7
1
VCC
RUN2
GND
2
D
8
Vo1+
CAPACITORS C45-C58 ARE OPTIONAL
INTVcc
DC543A
Date: Tuesday, June 18, 2002
1
2
3
4
5
6
7
Rev
LTC2920-2CMS8/LTC1628CG
Sheet
1
of1
8
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