DC1947A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
DESCRIPTION
2
PRODUCTION
APPROVED
WEI G.
DATE
08-15-12
CAUTION: HANDLING HIGH VOLTAGE INVOLVES RISK TO LIFE. COMPLY WITH SAFETY REGULATIONS!
D
D
C2
0.22uF
450VDC
FILM
R5
150
90 - 277VAC
1206
J1
L
2
1
N
R11
499k
1%
C
R3
200k
1%
R7
10k
D2
BAV20W
R1
249k
1%
1206
D4
SMBJ170A
C3
R2
249k
1%
1206
12
3
4
4
CAC1 0.1uF
B
R20
20k
1%
R21
0
R22
OPT
3
2
D1
CMR1U-10M
NC
FB
GATE
4
6
+
C10
330uF
63V
+
C11
330uF
63V
D9
SMBJ48A
R27
20k
0805
1
LED+
2
11
LED1A / 48V
1
C
C9
47pF
9
14
Q1
IPB60R165CP
R25
20
VREF
SENSE
CTRL3
INTVCC
CTRL2
COMPCOMP+
L1
1mH
J2
C23
1uF
100V
1206
10
9
10
DCM
VINSENSE
2
310VAC
R19
40.2k
1%
VIN
11
16
3.48K
R18
100k
1%
8
3
2
5
R4
9.31k
1%
BAV20W
R23
D3
PDU340
1
D8
CV385K10R
L2
27mH
B82731H2701A030
2
1
R33
200k
1210
C13
1.5nF
0805
250V
10uF
50V
V1
F1
300V, 2.5A
SS-5H-2.5A
R32
200k
1210
+
R10
499k
1%
T1
750817251
C21
4.7pF
15
13
8
7
R8
0.03
1206
C8
4.7uF
16V
0805
C20
2200pF
Y1
B
C6
10nF
CTRL1
2
1
GND
CT
LT3799EMSE-1
17
B1
HD06
FAULT
6
4
1
U1
5
C7
10nF
-
3
+
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
NOTES: UNLESS OTHERWISE SPECIFIED,
1. ALL CAPACITORS AND RESISTORS ARE 0805.
CONTRACT NO.
APPROVALS
PCB DES.
ENG.
TECHNOLOGY
JW
WEI G.
TITLE: SCHEMATIC
48W OFFLINE ISOLATED FLYBACK
LED CONTROLLER WITH ACTIVE PFC
SIZE
N/A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
DATE:
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
IC NO.
REV
LT3799EMSE-1
DC1947A
Wednesday, November 28, 2012
2
SHEET
1
1 OF
1
A
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