DC1279A - Schematic

5
4
3
PVIN
OPT
VIN E3
3V - 30V
40V TRANSIENTS
E5
GND
CPVIN
1uF
50V
1206
VIN
GND
R6
0
R5
OPT
E10
VREF
R7
0
0603
D
10
CTRL
5
VREF
CUSTOMER NOTICE
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
PVIN
R8
392k
1%
R3
OPT
1
Q2
OPT
R12
10k
1%
E9
R14
16.5k
1%
1MHz
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
TECHNOLOGY
KIM T.
CHECKED:
APPROVED:
ENGINEER: KEITH S.
DESIGNER:
SYNC
E11
GND
APPROVALS
DRAWN:
C
R9
OPT
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
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
4
1
ISP 15
ISN 14
FB 12
C5
4.7nF
A
OUT
R15
OPT
B
LED+
330mA
OUT
LED+
R13
3.3k
E2
2
TGEN
C4
0.01uF
5
OUT
MONITOR
OUTPUT
3
R10
OPT
13
TG 16
SYNC
E7
PWM
LED+
7
0603
9
U1
LT3517EUF
RT
R11
OPT
SHDN
6
4
E8
VC
CTRL
OPT
R1
0.300 Q1
1% Si2319DS
1206
2
3
8
PWM
+C1
C6
2.2uF
OPT
1206
CVIN
1uF
50V
1206
R2
OPT
1206
SW 1
SW 2
R4
51k
0603
E6
C
E1
PVIN
OUT
SHDN
OUT
COUT
2.2uF
50V
1206
11
E12
R16
OPT
1206
GND
GND
+C2
1.6A
17
D
CIN BOOST
VIN 3
PVIN
3V - 40V
1
D1
10MQ060N
2
1
L1
15uH
SS
E4
2
B
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
A
FULL-FEATURED LED DRIVER WITH 1.5A SWITCH CURRENT
SIZE
A
DATE:
DWG NO.
DC1279A-1 * LT3517EUF
Thursday, October 25, 2007
2
SHEET
1
REV
A-1
1 OF 1
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