DC850A - Schematic

5
VIN
3V-14.4V
D
GND
4
3
2
VIN
E1
D1
DFLS140
2
1
L1
10uH
R1
1M
0402
E2
C1
10uF,16V
1210
CDRH105R-100
C2
10uF,16V
1210
U1
GND
RUN
16
E5
SYNC
6
E7
15
13
R4
4.7k
C
C8
OPT
C9
0.01uF
R5
C10
1uF
16V
105k
1%
4
2
1
R6
10k
1%
5
ITH
PWMOUT 8
ILIM 3
VREF
GATE 9
SENSE 12
FBP
INTVcc
SS
RGATE
OPT 1206
10
C3
4.7uF
10V
0805
FBN
FREQ
Q1
Q2 (OPT)
Si4362DY
4
C5
10uF
25V
1210
C6
10uF
25V
1210
C7
OPT
+C11
+C12
560uF
50V
OPT
560uF
50V
OPT
E9
+C13
270uF
50V
OPT
D
GND
+C14
270uF
50V
OPT
R3
12.4k
1%
C
R7
0.040
1%
0805
LED3
R8
20k
RUN
SYNC
5
6
7
8
E6
VIN 11
OV/FB 14
PWMIN
R10
OPT
C4
10uF
25V
1210
E3 VOUT
LED+
350mA 25V OVP
1
2
3
SYNC
7
R2
237k
1%
GND
RUN
PWMIN
VOUT
17
PWMIN
LTC3783EFE
E4
1
E8
LED-
Q3
FDN337N (SOT23)
SO8 OPT
2
1
R9
0.3
1%
0805
B
CUSTOMER NOTICE
NOTES: UNLESS OTHERWISE SPECIFIED
A
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
CONTRACT NO.
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
CIRUIT 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.
5
4
B
3
APPROVALS
DRAWN:
CHECKED:
APPROVED:
ENGINEER: KEITH S.
DESIGNER:
TECHNOLOGY
KIM T.
TITLE:
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
SCHEMATIC
A
HIGH VOLTAGE LED BOOST CONTROLLER
SIZE
DWG NO.
A
DATE:
DC850A-2 * LTC3783EFE
Tuesday, August 09, 2005
2
SHEET 1
1
REV
A
OF 1
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