DC1694B - Schematic

5
4
3
2
C20
22V - 75V
E1
C2 C3
2.2uF
100V
1210
+ C1
100uF
100V
GND
R11
C4
C5
1210
OPT
1
3
1
SHDN
2
EN
U1
LT3748EMS
INTVCC
1206
C
GATE
C12
2200pF
SENSE
C9
4.7uF
16V
0805
R14
BAT41KFILM
SOD523
10
0603
D1
1
12
3
2
9
11
4
5
8
10
6
7
VOUT+
E5
PDS5100
C16 C17 C18
22uF
16V
1210
L1
0.47uH
OPT.
D4
DFLZ13
13V
ROUT
OPT
1210
Midcom
750311607
0
R13
12V / 2.5A
VOPT
C13 C14 C15
OPT
1210
VOUTE6
150K
0603
6
0805
R7
16
5 6 7 8
Q1
SI7450DP
4
C
0603
7
R8
0
1 2 3
0603
RREF
C19
OPT.
0603
R10
0.015
0805
14
GND
GND
9
8
11
VC
SS
TC
OPT.
5
EN/UVLO
RFB
12
220pF
22
D
T1
D5
43
R6
32.4k
250V
1812
100V
0805
D3
3
10
C10
R12
VIN
R3
402k
JP1
SHDN
43
C6
1uF
100V
1206
E2
1206
R15
100V
0805
270pF
VIN
D
1
R1
12.1k
C7
0.1uF
B
R9
63.4K
C11
22nF
C8
470pF
R5
6.04K
B
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0402.
ALL CAPACITORS ARE 0402.
CUSTOMER NOTICE
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
TECHNOLOGY
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
A
30W NON -OPTO FLYBACK CONVERTER
SIZE
IC NO.
N/A
DATE:
SHEET
Wednesday, July 23, 2014
2
REV.
LT3748EMS
DEMO CIRCUIT 1694B
1
2
1
OF
1
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