DC1961A - Schematic

5
4
3
2
1
D
D
VIN
E1
VIN
36V to 72V
L1
22µH
XAL6060-223MEC
Coilcraft
C2
4.7µF
100V
1210
+ C1
E2
47µF
80V
C3
4.7µF
100V
1210
C4
4.7µF
100V
1210
D1
SMBJ85A-13-F
R1
100
1210
D2
CMMR1U-02
C5
120pF
250V
0805
GND
C6
1µF
100V
0805
U2
LT3748EMS
INTVCC
5
R4
51k
RFB
10
12
C14
0.22uF
11
R10
60.4k
1%
14
C15
470pF
SS
GATE
TC
68
0805
C13
4.7µF
16V
0805
RREF
SENSE
GND
GND
8
9
11
C7
47µF
16V
1210
6
1
5
BAV20W-7-F
Coilcraft
C9
47µF
16V
1210
C8
47µF
16V
1210
VOUT+
12V / 5A
C12
47µF
16V
1210
D3
CMZ5928B
R2
(Opt)
1206
Q1
BSC047N08NS3
7
C
VOUTR6
0 Ohm
R8
160k
1%
0805
U1
LT8309ES5
Q2
BSC320N20NS3G
D5
R11
7
3 Ohm
C18
47pF
R9
4
BAV20W-7-F 3 Ohm
0805 D6
36V
R13
0.010
1%
0815
C20
4700pF
250V
1812
CUSTOMER NOTICE
NOTE: UNLESS OTHERWISE SPECIFIED.
1. ALL RESISTORS 0603.
2. ALL CAPACITORS 0603.
R15
3
INTVCC
GND
5
2.37k
1%
1206
DRAIN
GATE
3
2
C17
4.7uF
25V
0805
1
C21
(Opt)
0805
B
APPROVALS
TECHNOLOGY
TITLE: SCHEMATIC
N/A
SCALE = NONE
2
1630 McCarthy Blvd.
Milpitas, CA 95035 www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
A
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
SIZE
C:\PADS PROJECTS\1961A(LT8309MSE)\SCH\1961A_REV2.DSN
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
VIN
C16
1uF
100V
1206
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
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
4
C11
47µF
16V
1210
E3
E4
8
6
B
5
C10
47µF
16V
1210
9
0 Ohm
R14
6.04k
1%
VOUT
R7
16
VC
R12
7.50k
1%
C19
33nF
D4
R5
EN/UVLO
4
2
INTVCC
VIN
3
12
10
1
R3
1.2M
C
L2
1µH
XAL6030-102MEC
T1
PA1736NL
3
DATE:
IC NO.
60W, 36V-72VIN TO 12V/5A
SYNCHRONOUS FLYBACK CONVERTER
REV.
LT8309ES5/LT3748EMS
2
DEMO CIRCUIT 1961A
Feb 21, 2014
07:32:08
SHEET
1
1
OF
1
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