DC842A - Schematic

5
3
2
This circuit is proprietary to Linear Technology and supplied
for use with Linear Technology parts.
Customer Notice: Linear Technology has made a best effort to
design a circuit that meets customer-supplied specifications;
however, it remains the customers 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
Applications Engineering for assistance.
ECO
R1
OPT
R2 80.6k 1%
SHDN
GND
R3 0
R5
10k
E3
R4 OPT
C2
APPROVED
16
5
RT
BIAS
7
11
REF
OUT
2
13
VADJ
PWM
14
12
VC
LED
3
9
0.22uF
15
8
L1 10uH
1
SW
SHDN
C3
D1
C4
CDRH6D28NP100NC
2.2uF
6.3V
DFLS140
E4
PWM
LED+
E5
2
0.1uF
DNC
6
10
SW1
LED
ON
DATE
04/13/05
2
C1
2.2uF
50V
BOOST
VIN
GND
4
E2
C
1
LT3474EFE
VIN
4V - 36V
DESCRIPTION
PROTO
D
DNC
E1
REV
3
U1
VIN
1
REVISION HISTORY
GND
D
4
C
PWM
GND
LED1
LXHL-LW3C
LUXEON III STAR
+
1
-
2
4
Q2
1
3
2
1
B
B
OPT
3
Q1
OPT
SO8
8
7
6
5
LED-
SOT23
CONTRACT NO.
APPROVALS
DRAWN
MEI
CHECKED
A
DATE
09/23/04
TECHNOLOGY
TITLE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
SCH, LT3474EFE, 36V STEP-DOWN 1A LED DRIVER
A
APPROVED
ENGINEER
DESIGNER
Tuesday, May 10, 2005
5
4
3
SIZE
CAGE CODE
SCALE:
DWG NO
FILENAME:
2
841A-3.DSN
REV
DC842A
SHEET
3
1
1
OF
1
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