DC1772A - Schematic

REVISION HISTORY
ECO
REV
-
3
DESCRIPTION
PRODUCTION
APPROVED
DATE
KEITH S.
06-20-12
OPTIONAL FOR BUCK MODE
C9
OPT.
1210
OUT
PVIN
PVIN
8V - 60V
E1
E13
OUT
C10
4.7uF
100V
1210
R15
OPT.
1206
D1
PDS5100H
R11
0
1206
LED+
RS2
3
2
COOPER
C1
4.7uF
100V
1210
M1
BSC123N08NS3
C2
2.2uF
100V
1210
R3
1.0M
1%
0603
C11
2.2uF
100V
1210
C3
2.2uF
100V
1210
C12
2.2uF
100V
1210
C13
OPT.
1210
0.25
1%
1/2W
1206
E7
OUT
Q2
OPT
SOT23
R13
E5
C4
1uF
100V
1206
OUT
R1
499k
1%
R16
OPT.
0603
EN/UVLO
E6
R2
90.9k
1%
R7
1M
1%
CTRL
E10
R8
140k
1%
INTVCC
7
6
E2
OPENLED
C5
1uF
10V
R9
100k
0603
9
16
VIN
EN/UVLO
SENSE
2
FB
VREF
ISP
U1
CTRL
ISN
LT3761EMSE
PWMOUT
124k
0603
GND
E12
NOTE: UNLESS OTHERWISE SPECIFIED
FB
C7
0.01uF
0603
OPTIONAL FOR SHORT CIRCUIT
4
C14
OPT
3
1
OPT
PWMOUT
E8
M2
Si2328DS
R23
5
GND
PWM
RT
0603
LED -
R24 OPT
R12
0805
17
11
8
R10
DIM
D2
ES1C
OPT
OPT.
0 0603
OPENLED
10
E4
R25 OPT.
C15
OPT
INTVCC
E11
GND
M4
R14
OPT.
0805
LED +
60V / 1A
OPENLED
15
GATE
DIM/SS VC
E14
OPT.
R4
18.2k
M3
1%
OPT
0.008
2010
R22
OPT.
13
INTVCC
RS1
14
12
OUT
R17
OPT.
OPENLED
OUT
1
PGND
VIN
8V - 60V
E3
L1
10uH
HC9-100-R
R5
10k
C6
4700pF
R6
29.4k
1%
350kHz
E9
C8
0.047uF
R18
OPT.
0603
Q3
R27
INTVCC
OPT 0603
OUT
OPT
FB
SOT23
INTVCC
R26
OPT.
0603
D3
PVIN
LED+
OPT.
FB
OPTIONAL LEVEL SHIFT FOR BUCK
MODE OR BUCK-BOOST MODE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
APPROVALS
PCB DES.
APP ENG.
Q1
OPT.
SOT23
R20
1N4148W
OPT
OPTIONAL FOR SHORT CIRCUIT
CUSTOMER NOTICE
TECHNOLOGY
JW
KEITH S.
TITLE: SCHEMATIC
SIZE
N/A
SCALE = NONE
R19
OPT.
R21
OPT.
1. ALL RESISTORS ARE IN 0402.
ALL CAPACITORS ARE IN 0603.
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.
PWM
DATE:
IC NO.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
HIGH VOLTAGE LED CONTROLLER
WITH INTERNAL PWM DIMMING
REV.
LT3761EMSE
DC1772A
Wednesday, September 05, 2012
3
SHEET 1
OF 1
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