DC2020A - Schematic

REVISION HISTORY
DESCRIPTION
APPROVED
ECO REV
1
2
-
C12
1st PROTOTYPE
PRODUCTION
DATE
K. SZOLUSHA
K. SZOLUSHA
OPT
Sep 17, 2012
Apr 16, 2013
OUT
1210
* SEE DEMO MANUAL FOR INPUT RANGE
C13
OPT
1210
PVIN
R12
0
1206
R22
OPT
R18
PVIN
C1
1µF
100V
1206
35
36
R21
30
124k
1% C10
0.01µF
R1
28.7k
350kHz
R2
5.1k
21
SW
38
SW
8
SW
SW
9
10
NC
PWMOUT
VMODE
RT
VC
C6
2.2µF
100V
1210
C7
2.2µF
100V
1210
C8
OPT
1210 E4
PGND
INTVCC
E7 LED+
67V LED MAX
300mA
RS1
R8
25
16.9k
1%
0.82 1%
1206
28
27
E8
C17
OPT
LEDR23
M1
Si2328DS
OPT
0603
23
R11
R10
0
0805
DIM/SS
GNDK
DIM
PWM
GND
33
C16
47nF
300Hz
ISN
U1
LT3955EUHE
0603
PWM
E15
VREF
GND
32
ISP
24
OPT
PGND
E9
R14
OPT
0603
R13
CTRL
37
R20
OPT
0603
31
PGND
INTVCC
R4
165k
1%
0603
R6
147k
1%
C5
2.2µF
100V
1210
R7
1.00M
1%
0603
EN/UVLO
17
SYNC
FB
PGND
E14
SYNC
2
SYNC
16
E6
CTRL
1
PGND
SYNC
PGND
R19
OPT
0603
15
EN/UVLO
VIN
R3
499k
0603
13
E10
R5
1M
6
OUT
R16
OPT
0603
12
E3
PGND
OUT
C4
2.2µF
100V
1210
R17
OPT
Q1
OPT
OPT
14
OUT
E5
OUT
22µH
C3
4.7µF
100V
1210
20
R15
OPT
1206
E2
VIN
5V - 60V*
C2
4.7µF
100V
1210
SW
OUT
C15
OPT
1210
D1
PDS3100-13
GND
PVIN
5V - 60V*
L1
4
E1
C14
OPT
1210
34
3
OPT
0805
-VMODE
R24
R9 100k
0603
INTVCC
E11
VMODE
SYNC
0
0603
E12
GND
E13
C11
1µF
10V
GND
C9
4.7nF
INTVCC
E16
INTVCC
CUSTOMER NOTICE
NOTES: UNLESS OTHERWISE SPECIFIED.
1. RESISTORS ARE 0402 CASE SIZE.
2. CAPACITORS ARE 0603 CASE SIZE.
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.
APPROVALS
PCB DES.
RB
APP ENG.
KEITH S.
TITLE: SCHEMATIC
60VIN 80VOUT LED DRIVER
SIZE
C:\PADS PROJECTS\2020A(LT3955EUHE)\SCH\2020A_REV2.DSN
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
N/A
SCALE = NONE
IC NO.
LT3955EUHE
DATE: Apr 16, 2013
DC2020A
SHEET 1
REV.
2
OF 1
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