DC1311A - Schematic

REVISION HISTORY
ECO
REV
0
-
+VIN
18V - 72V
CIN1
2.2uF
100V
R1
221K
1%
0805
CIN2
2.2uF
100V
E1
Q1
MMBTA42LT1G
-VIN
D3
CO1
100uF
6.3V
BAS516
R4
22
0805
1206
VU1
R5
681
1%
1206
CO2
100uF
6.3V
CO3
100uF
6.3V
E4
D1
7
8
1
1
3
GND
2
PDS1040
R22
0 Ohm
D6
BAS516
C2
1uF
+VOUT
C11
(Opt)
C10
(Opt)
1
1
R18
221K
1%
0805
R17
3
JP1
3
0 Ohm
2
OFF
4
R19
15.8K
1%
GATE
10
C3
2
ON
SSFLT
0.1uF
R10
C12
(Opt)
75K
5
ITH
Vcc
FB
OC
RUN
ISENSE
FS
SYNC
ITH
9
8
7
6
1uF
R7
R2
R23
0 Ohm
GND
11
3
VCC
VIN
OPTO
GND
COMP
OC
FB
C14
(Opt)
6
R12
6.8K
R13
C5
10K
0.01uF
5
4
C7
0.33uF
R14
22.1K
1%
R11
270
D4
BAS516
4
1
(Opt)
3.01K
1%
2
C4
1uF
Q2
FDC2512
C9
+VIN
1
C1
150pF
200V
U1 [1]
R9
(Opt)
U2
LT4430ES6
D7
BAT760-7
R3
68
1206
R15
100K
C6
100pF
R16
10
ITH
+VOUT
3.3V @ 3A
CO4
100uF
6.3V
2
R21
VCC
D2
PDZ6.8B
5
6
3
[1]
APPROVED
<APPROVED>
+VOUT
4
RUN
DATE
<DATE>
1st PROTOTYPE
TR1
PA1277NL
+VIN
E2
E3
DESCRIPTION
ISO1
PS2801-1-K
RCS
0.040
1%
3
2
D5
BAS516
C15
VU1
2200pF
250V
R6
(Opt)
R20
(Opt)
1206
C16
E5
FSET
(Opt)
1206
SYNC
1
EXT
[1]
ASSY
2
3
INT
JP2
C8
1000pF
R8
1M
100k
-B
LTC3805EMSE-5
DNP
DRAWN: Rudy Bautista
ENGINEER:
R21
LTC3805EMSE
APPROVALS
This circuit is proprietary to Linear Technology and supplied
for use with Linear Technology parts.
Customer Notice: Linear Technology has made a best effort to
design a circuit that meets customer-supplied specifications;
however, it remains the customers 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
Applications Engineering for assistance.
U1(IC)
-A
Victor Khasiev
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD
MILPITAS, CA. 95035
(408)432-1900
(408)434-0507 (FAX)
www.linear.com
LTC Confidential For Customer Use Only
Title
APPROVED:
CHECKED:
Date:
Wednesday, April 16, 2008
18V - 72Vin to 3.3Vout @3A Isolated DC/DC Converter
SD
Document Number
Rev
Demo Circuit 1311A
C:\ORCADWIN\CAPTURE\1311A\1311A_REV2.DSN
Sheet
2
1
of
1
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