DC2079A - Schematic

REVISION HISTORY
DESCRIPTION
APPROVED
ECO REV
1
-
PRODUCTION
DATE
K. SZOLUSHA
May 24, 2013
C12
OUT
(Opt)
1210
C13
* SEE DEMO MANUAL FOR INPUT RANGE
E1
E15
36
R21
30
124k
1%
0603
C10
0.01µF
R1
28.7k
1%
350kHz
R2
5.1k
C7
(Opt)
1210
C8
(Opt)
1210 E4
20
SW
21
SW
38
SW
8
SW
SW
9
10
NC
PWMOUT
VMODE
RT
VC
OUT
C6
(Opt)
1210
INTVCC
E7
RS1
R8
25
0.39
1%
1206
37.4k
1%
28
27
LEDR23
M1
Si2318CDS-T1-GE3
(Opt)
0603
23
R11
R10
0 Ohm
0805
34
3
LED+
32V LED MAX
650mA
E8
C17
(Opt)
DIM/SS
GNDK
DIM
PWM
GND
35
C16
47nF
300Hz
ISN
GND
33
PWM
VREF
4
(Opt)
0603
GND
R14
(Opt)
0603
32
ISP
U1
LT3954EUHE
24
R13
CTRL
PGND
E9
31
37
R20
(Opt)
0603
R6
165k
1%
PGND
INTVCC
C5
4.7µF
50V
1210
R7
1.00M
1%
0603
EN/UVLO
17
SYNC
FB
16
SYNC
2
R4
147k
1%
0603
SYNC
PGND
E6
E14
1
PGND
SYNC
15
EN/UVLO
R19
(Opt)
0603
PGND
R3
499k
0603
14
E10
R5
1M
Q1
(Opt)
(Opt)
6
OUT
R16
(Opt)
0603
R17
(Opt)
R18
PVIN
VIN
E3
PGND
R22
(Opt)
C4
4.7µF
50V
1210
PGND
C1
1µF
50V
1206
OUT
OUT
PDS560-13
R12
0 Ohm
1206
13
E2
VIN
5V - 30V*
22µH
DR125-220
12
R15
(Opt)
1206
C3
10µF
50V
1210
C15
(Opt)
1210
E5
D1
C2
10µF
50V
1210
OUT
CTRL
(Opt)
1210
L1
PVIN
PVIN
5V - 30V*
C14
(Opt)
1210
(Opt)
0805
-VMODE
R9
R24
100k
0603
0 Ohm
0603
INTVCC
E11
VMODE
SYNC
E12
GND
E13
C11
1µF
10V
GND
C9
4.7nF
INTVCC
E16
INTVCC
CUSTOMER NOTICE
NOTES: UNLESS OTHERWISE SPECIFIED.
1. RESISTORS ARE 0402 CASE SIZE.
2. CAPACITORS ARE 0603 CASE SIZE.
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.
RB
APP ENG.
KEITH S.
TITLE: SCHEMATIC
SIZE
C:\PADS PROJECTS\2079A(LT3954EUHE)\SCH\2079A_REV1.DSN
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
TECHNOLOGY
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
40VIN LED CONVERTER WITH
INTERNAL PWM GENERATOR
IC NO.
REV.
LT3954EUHE
DC2079A
DATE: May 24, 2013
1
SHEET 1
OF 1
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