DC1612A - Schematic

A
B
C
D
NOTE: UNLESS OTHERWISE SPECIFIED
ECO
1. ALL RESISTORS ARE IN OHMS 0402
REV
VIN
VIN
SHDN / UVLO
R14
(Opt.)
C1
1uF
50V
0805
OUT
E6
R13
(Opt.)
0603
E7
R4
1M
1206
15
R15
(Opt.)
0603
E8
PVIN
R6
1M
CTRL
E11
3
14
OUT
R12
(Opt.)
0603
U1
VIN
CATHODE
ISP
ISN
4
R5
PWM
5
R1
1.69
0805
10
VREF
OPENLED
12
R17
(Opt.)
0603
13
2
CTRL
R11
(Opt.)
0603
3
R3
69.8k
VIN
R10
100k
0603
GND
1
LED+
16V MAX
150mA
R16
(Opt.)
0603
OUT
3
Q1
(Opt.)
SOT23
E9
E10
OPENLED
LED-
M1
Si2318DS
2
ASSEMBLY TABLE:
E3
ASSY
*PVIN, VIN
U1
L1, L2
C3
R5
-A
6V - 24V
LT3519EMS-1
22uH
2.2uF, 1206
261k
-B
7V - 24V
LT3519EMS-2
10uH
1uF, 0805
251k
CUSTOMER NOTICE
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.
APPROVALS
PCB DES.
ENG.
B
R9
0
0805
TECHNOLOGY
K.L.
KEITH S.
E13
GND
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
1
HIGH FREQUENCY SEPIC LED DRIVER
SIZE
IC NO.
LT3519EMS-1 / -2
DEMO CIRCUIT 1612A-A / B
N/A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
A
2
1
R7
174k
2
OUT
PVIN
R2
1M
FB
4
E1
E4
11
SHDN/UVLO
PWM
11-23-09
2
3
R8
0
1206
E5
*6V - 24V
GND
OUT
C5
(Opt.)
1206
1
(Opt.)
6032
C4
2.2uF
25V
1206
3
E12
KEITH S.
1
8
9
16
GND
C2
1uF
50V
0805
6
+C6
*6V - 24V
ANODE
E2
DATE
OUT
L2
C3
SW
PVIN
L1
7
PVIN
APPROVED
PRODUCTION
GND
GND
GND
GND
* SEE QUICKSTART GUIDE FOR MIN. INPUT
DESCRIPTION
1
-
4
E
REVISION HISTORY
DATE:
C
Thursday, January 14, 2010
D
SHEET
E
REV
1
1 OF 1
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