DC1497A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
VIN
VIN
6V - 55V
DESCRIPTION
1
APPROVED
DATE
WALKER B.
2ND PROTOTYPE
01-26-11
EN/UVLO
E4
+
D
C9
4.7uF
63V
C7
2.2uF
100V
1210
GND
VREF
C10
2.2uF
100V
1210
R13 R12
100K 100K
E5
E16
R7
270K
0603
R9
91K
EN/UVLO
D
1
2
R11
100K
3
ON
OFF
PWM1
E6
R18
100K
R17
100K
SW1
DA1
FB1
VOUT1
CTRL1
E9
LED1+
9
51
50
VIN
VIN
BST1
U1
LT3597EUHG
33
CTRL1
30
NC
R14
100K
L1
100uH
C1
EN/UVLO
26
PWM1
PWM3
VREF
29
E8
PWM2
28
E7
PWM3
JP1
C4
0.22uF
0603
PWM2
LED1
2
2
50V
1
4.7uF
1206
4
D1
DFLS160
6
R4
3.01K
7
R1
93.1K
E1
LED1+
19
20
LED1E12
C
32
CTRL2
CTRL2
E10
BST2
SW2
31
CTRL3
CTRL3
E11
DA2
FB2
27
SYNC
SYNC
E18
LED2
17
R20
10K
BST3
SW3
ISET2
DA3
16
ISET3
FB3
44
CTRLM
VOUT3
VREF
LED3
22
21
2
39
D2
DFLS160
D4
C8
4.7uF
25V
0805
TP
E19
OPT
BIAS
E17
C2
50V
1
R5
3.01K
41
4.7uF
1206
R2
93.1K
43
LED2E13
23
24
C6
0.22uF
0603
L3
100uH
C3
1
50V
D3
DFLS160
R6
3.01K
4.7uF
1206
R3
93.1K
LED3E14
CUSTOMER NOTICE
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0402
4
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT 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
LED3+
E3
t
FAULT
A
B
LED3+
R10
100K
E15
LED2+
E2
35
2
R15
8.87K
R21
100K
0603
LED2+
34
R16
82.5K
R19
49.9K
L2
100uH
13
VREF
TSET
12
25
BIAS
FAULT
GND
11
53
GND
R25
20K
37
R24
20K
18
B
ISET1
15
R23
20K
C5
0.22uF
0603
46
RT
14
R22
33.2K
VOUT2
C
48
3
TECHNOLOGY
AK
WALKER B.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
TRIPLE STEP-DOWN LED DRIVER
SIZE
IC NO.
REV.
LT3597EUHG
2
DEMO CIRCUIT 1497A
SCALE = NONE
DATE:
2
Wednesday, February 02, 2011
SHEET
1
1
OF 1
A
Similar pages