DC2220A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
DESCRIPTION
APPROVED
PRODUCTION
2
VK
DATE
9-01-15
Q1
D
SI4491EDY 3
2
5
1
E1
VIN
R2
+ C9
47uF
C10
4.7uF
1210
R1
511K
4
3V - 17V
R5
37.4K
C8
OPT
0.01
1210
+ C11
E2
GND
R3
133K
R4
1MEG
4
E9
5
24
C
6
8
E10
R12
OPT
13
R7
IN
INDIS
IN
INDIS
CLP
SW
GATE
SW
FBSYS
SW
PFI
BOOST
INTVCC
CAP
510K
E5
11
CAPGD
R8
CAPGD
FBCAP
INTVCC
ITH
510K
E6
12
/PFO
7
2
1
3
OFF
INTVCC
ILIM
RUN
1
ON
/PFO
2
17
L1
7.2uH
18
C
19
20
C1
0.1UF
40V MAX
15
3
R10
322K
10
21
INTVCC
C2
4.7uF
0805
C4
22pF
R9
402K
PGND
NC
PGND
NC
22
23
E7
R11
5.11K
GND
1
2A
2
3
3A
4
4A
JP2
APPROVALS
TECHNOLOGY
LT
VK
TITLE: SCHEMATIC
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
BIDIRECTIONAL HIGH VOLTAGE BACKUP CONVERTER
1. ALL RESISTORS AND CAPACITORS ARE 0603.
4
C14
10uF
1210
CAP
ILIM_BUCK
CUSTOMER NOTICE
NOTE: UNLESS OTHERWISE SPECIFIED
C15
1uF
100V
0805
+ C5
+ C6
1000uF
OPT
50V
C3
470pF
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.
A
C7
OPT
9
14
E8
40V BACKUP
B
25
JP1
5
GND
16
RUN
PGND
B
E4
U1
LTC3643EUDD
R6
5.11K
GND
PFI
LOAD
C13
10uF
1210
C12
10uF
1210
47uF
D
E3
5V SYSTEM BUS
N/A
SCALE = NONE
2
DATE:
IC NO.
LTC3643EUDD
DEMO CIRCUIT 2220A
REV.
2
Tuesday, September 01, 2015
SHEET 1
1
OF 1
A
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