DC1327B - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
1
1
DESCRIPTION
APPROVED
DATE
REBUILD WITH CHANGES
WALKER B.
4-6-10
D
D
SHDN/UVLO 27
28
C3
1uF
6.3V
25
24
VREF
NC
26
2
NC
VOUT
1
SW
20
18
VOUT
LT3599EFE
LED4
VIN
LED3
AGND
LED2
VREF
LED1
R17
232K
VIN
5
R3
100K
4
E17
9
R8
31.6K
SHDN/UVLO
R16
37.4K
E18
1
SS
8
R9
53.6K
(1MHz)
R10
16.5K
(80mA)
C4
47nF
SYNC
PWM
SHORTLED
ON
2
OFF
OPTIONAL COMPONENTS
R11
10K
FB1 (OPT)
VEMI
E15
C10
100pF
L2
1206
C6
(OPT)
0603
R15
64.9K
B
OPENLED
JP1
DISABLE4
R14
200K
CTRL
R4
100K
11
15
ISET
DISABLE4
23
GND
13
PWM
R7
976K
VO_SW
29
PVIN
C12
4.7uF
50V
E9
LED1-
6
VREF
21
R6
80.6K
SHORTLED
SYNC
3
16
PVIN
E8
LED2-
E7
LED3-
7
CTRL
19
CTRL
E12
TSET
RT
17
14
CTRL
E6
LED4-
C2
4.7uF
50V
C
R5
52.3K
22
E16
OPENLED
FB
GND
LED2+ LED1+
E5
E4
U1
SHDN/UVLO
C9
(OPT)
C
LED4+ LED3+
E3
E2
3
3.1V - 5.5V
VIN
E11
1
VC
VIN
NC
10
E10
NC
GND
12
C1
3.3uF
25V
2
NC
PVIN
E1
*
PVIN
8V - 16V
D1
L1 10uH
LPS4018-331 PVIN
(OPT)
C5
+ 10uF
50V
(OPT)
C7
(OPT)
1210
C8
2.2nF
E13
B
E14
R1
100K
R13
100K
* See Quick Start Guide
CUSTOMER NOTICE
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.
A
CONTRACT NO.
APPROVALS
PCB DES.
ENG.
WALKER B.
4
3
TITLE: SCHEMATIC
4-CHANNEL 120mA LED DRIVER WITH +/-15% CURRENT MATCHING
SIZE
N/A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
TECHNOLOGY
H.Z.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
2
IC NO.
REV
LT3599EFE
1
DEMO CIRCUIT 1327B
Tuesday, April 13, 2010
SHEET
1
1 OF 1
A
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