DC1784A - Schematic

5
4
3
2
1
REVISION HISTORY
LED1+
GND
PVIN
R27
105K
1210
C25
C19
C5
4.7uF
1210
L1
10uH
D1
2
1
3
PDS360
R26
100K
PVIN
R31
OPT
OVLO
E24
PVIN
R20
140K
R41
OPT
0603
R17
1M
1
PDS360
4
R12
0.008
2010
R11
0.008
2010
51
E4
52
10
7
GND
GND
GND
GND
FLT1
UP TO 50V LED 1A
E12
LED3+
OUT1
R14
1M
0603
R15
1M
0603
E14
C
R10
R16
1M
0603
E15
E16
E17
49
4
REF
C8
0.1uF 0603
E18
L4
47uH
R38
OPT
0603
SD25-470-R
OUT3
23.2K
38
47
OUT2
23.2K
OUT3
30
48
OUT1
OUT2
R9
R37
OPT
0603
17
E13
23.2K
R39
OPT
0603
R40
OPT
0603
E19
E20
5
E21
6
GND
GND
GND
PWM1
PWM2
B
PWM3
R1
47.5K
C9
10uF
10V
0603
310kHz
E27
C16
OPT
E28
C10
6.8nF
R5
3.9K
E29
C17
OPT
C11
6.8nF
C12
6.8nF
R6
3.9K
R7
3.9K
SYNC
12
SS3
41
SS2
27
SS1
20
53
45
GND
FLT3
E9
C13
0.1uF
C14
0.1uF
C15
0.1uF
0603
0603
0603
A
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
4
E22
SYNC
R30
0
0603
C18
OPT
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.
5
2
R8
35
PWM3
FLT2
UP TO 50V LED 1A
E11
LED2+
D6
PVIN
TG3
36
37
ISP3
ISN3
42
43
SENSEP3
SENSEN3
44
GATE3
32
33
TG2
ISP2
ISN2
31
26
25
SENSEP2
SENSEN2
TG1
24
14
15
ISP1
PWM1
VC3
2
E8
E26
ISN1
16
21
22
REF
INTVCC
INTVCC
SW2
PWM2
1
3
E7
CTRL3
40
R25
100K
0603
R34
OPT
VC2
FLT3
E6
R24
100K
0603
R33
OPT
28
FLT2
R23
100K
0603
R32
OPT
BOOST
U1
LT3797EUKG
INTVCC
FLT1
REF
FBH1
SW1
CTRL2
D
ES1B
R36
OPT
0603
CTRL1
VC1
E5
INTVCC
B
9
2
1
R35
OPT
0603
R45
OPT
0603
OPT
FBH3
19
CTRL3
R19
1M
UP TO 50V LED 1A
E10
LED1+
D5
PVIN
OVLO
RT
R22
140K
8
2
1
C24
FBH2
11
PVIN
01-15-14
ES1B
R4
.25 M6
2010 SI7113DN
3
8
2
7
1
6
5
LED3+
PVIN
R13
0.008
2010
EN/UVLO
46
CTRL2
VIN
GATE2
50
R18
1M
INTVCC
R21
140K
SENSEP1
PVIN
SENSEN1
23
GATE1
C
E25
DATE
KEITH S.
D4
OPT
CTRL1
APPROVED
ES1B
1
100V
1210
4
R43
OPT
0603
R44
OPT
0603
R42
OPT
C23
0603
C22
OPT
1
PDS360
BSC039N06NS
M5
R3
.25 M4
2010 SI7113DN
3
8
2
7
1
6
5
PRODUCTION
1210
C29
C21
C7
4.7uF
D3
2
3
DESCRIPTION
5
C30
OPT
1210
L3
10uH
100V
1210
BSC039N06NS
M3
4
R28
0
4
1
2
3
R46
OPT
2
3
R2
.25 M2
2010 SI7113DN
3
8
2
7
1
6
5
5
6
7
8
E23
EN/UVLO
D2
100V
1210
BSC039N06NS
M1
1210
C27
C20
C6
4.7uF
1210
L2
10uH
C33
C4
4.7uF
50V
1210
REV
__
4
C1
1uF
50V
0805
C32
C3
4.7uF
50V
1210
5
6
7
8
VIN
J2
D
C31
C2
4.7uF
50V
1210
ECO
OUT3
C36
OPT
PVIN
1
2
3
VIN
E2
C37
33uF
50V
5
6
7
8
2.5V - 40V
+
R29
0
1206
C35
OPT
PVIN
LED2+
OUT2
C28
OPT
1
2
3
PVIN
C34
OPT
PVIN
PVIN
OUT1
C26
OPT
4
PVIN
J1
3
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
LT
KEITH S.
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 LED BOOST CONTROLLER
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LT3797EUKG
DC1784A
5
Wednesday, January 15, 2014
SHEET 1
1
OF 1
A
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