DC780 - Schematic

5
D
4
3
2
VLED-
1
REVISION HISTORY
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
REV
2
DESCRIPTION
DATE
PROTO
APPROVED
03/16/04
D
E5
E4
VLED+
D1
VIN
E1
1
3.3V-4.2V
R3
2
0.10
LXHL-BW02
LUMILEDS
C1
1uF
6.3V
2
SD25
GND
9
1
PMEG2010EA
C
7
SW
1
Vin
OFF / ON
E2
U1
R6 LT1618EDD
OPT
8
2
C
4.7uF
D2
L1 10uF
SW1
C2
SHDN
SW
6
Isp
3
Isn
2
Fb
1
R5
1M
R2
866k
E3
R4
250mA/500mA
2.2M
R1
124k
10
SW2
B
5
BRIGHTNESS
Iadj
Vc
4
B
GND
IADJ
C3
0.1uF
*500mA
PULSE ONLY
CONTRACT NO.
APPROVALS
DRAWN
MEI
CHECKED
A
APPROVED
ENGINEER
DESIGNER
Tuesday, June 22, 2004
5
4
3
DATE
02/18/04
TECHNOLOGY
TITLE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
SCH, LT1618EDD, CONSTANT-CURRENT
1.4MHz WHITE LED DRIVER
SIZE CAGE CODE
SCALE:
DWG NO
FILENAME: 780A-2.DSN
2
REV
DC780A
SHEET
A
2
1
1
OF
1
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