DC1521A - Schematic

REVISION HISTORY
ECO
R19
OPT
0805
M2
OPT
C2
2.2uF
100V
1210
R15
OPT
1206
R12
0
1206
2
R6
40.2k
31
R13
32
C8
2.2uF
100V E4
1210
PGND
20
SW
38
21
SW
SW
8
SW
9
SW
C7
2.2uF
100V
1210
ISP
ISN
E7 LED+
67V LED MAX
370mA
RS1
R8
25
0.68 1%
1206
16.2k
VREF
C6
2.2uF
100V
1210
R22
OPT
1206
R7
1M
1%
EN/UVLO
CTRL
C5
2.2uF
100V
1210
28
E8
PWMDRAIN
27
LED-
M1
Si2328DS
4
GND
INTVCC
GND
PGND
PGND
17
12
R2
33k
VMODE
16
VC
R11
0
R10
0805
RT
PGND
30
23
SS
PGND
36
PWMOUT
PGND
C10
0.1uF
PWM
15
35
PGND
33
R1
28.7k
375kHz
C15
OPT
1210
OUT
0603
PWM
* SEE QUICK-START GUIDE FOR INPUT RANGE
FB
14
E9
R14
OPT
0603
OPT
NC
13
INTVCC
R4
100k
0603
NC
1
CTRL
E6
10
R24
OPT
0603
0603
EN/UVLO
03/10/10
E5
C4
2.2uF
100V
1210
Q1
OPT
U1
LT3956EUHE
C1
OPT
1206
6
R3
332k
K. SZOLUSHA
PWMDRAIN
R17
OPT
VIN
R5
332k
DATE
PRODUCTION
OUT
C3
2.2uF
100V
1210
OUT
R16
OPT
0603
E10
OPT 0805
PVIN R18 OPT
OUT
PGND
R21
APPROVED
3
D1
PDS3100-13
VIN
6V - 80V*
E3
OPT 1206
DESCRIPTION
C14
OPT
1210
GND
E2
OPT
L1 22uH
PVIN
OUT
C13
24
6V - 80V*
OPT
37
E1
PVIN
R23
OPT
1206
C12
R20
REV
34
3
-VMODE
0
E11
0805
VMODE
R9 100k
0603
E12
GND
INTVCC
E13
C11
4.7uF
10V
0603
GND
C9
4.7nF
NOTES: UNLIESS OTHERWISE SPECIFIED,
1. CAPACITORS AND RESISTORS ARE 0402 CASE SIZE.
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
APPROVALS
TECHNOLOGY
PCB DES. MI
APP ENG. KEITH S.
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
80VIN / 80VOUT LED DRIVER
SIZE
N/A
SCALE = NONE
IC NO.
REV.
LT3956EUHE
DEMO CIRCUIT 1521A
DATE: Friday, April 02, 2010
SHEET 1
3
OF 1
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