DC720A - Schematic

5
GND
CIN2
2.2UF,100V
1812
CIN3
2.2UF,100V
1812
D
C1
0.1UF,100V
4
5
6
CCM
5 BURST_EN
6 VFB
R5
5.1M
0603
R8
82.5K
R6
14.7K
1%
R7
130K
1%
5
6
7
8
VOUT
RSENSE
15M, 1%
VOUT
VCC 12
BG 11
4
PGND 10
SENSE+ 9
C5
1UF,16V
0805
D2
1N4148WS
Q2
Q4(OPT)
Si7370DP
+COUT1
1
5 1
6 2
7 3
8
D1 VCC
BAS19
C3
680PF
270UF,16V
D3
B160
C7
470PF
100V
1206
OSCON
16SP270M
COUT2
22UF,16V
1210
X7R
COUT3
22UF,16V
1210
X7R
GND
E3
E4
VOUT
[email protected]
GND
C
2
C
C4
120PF
7 VC
8 SENSE-
L1
15UH
2
3
SW 14
NC 13
1
2
3
BURST_EN
DCM
3 SHDN
4 CSS
PULSE
PANASONIC
PB2020-153 ERJM1WSF15MU
Q1
Q3(OPT)
Si7850DP
4
2
2
1
R4
200K
BOOST 16
TG 15
1
C2
1500PF
C6
0.22UF,16V
0603
R2
0
4
JP2
1 VIN
2 NC
R3
82.5K
0402
SHDN
U1
LT3800EFE
0805
JP1
3
RUN
VCC
1
R1
1M
0805
1
E2
SANYO
63MV120AX
SGND
GND
2
VIN
CIN1
120UF, 63V
D
3
17
VIN E1
20V-55V
4
5
D5
MBR0520L
1
2
C8
1UF,16V
0603
B
Q5B
Si1555DL
3
VCC
6
VCC
E5
1
D4
MBR0520L
Q5A
Si1555DL
B
1
2
OPTIONAL BOOST BIAS CIRCUIT
CUSTOMER NOTICE
A
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISITOR ARE IN OHMS, 0402; AND ALL CAPACITORS ARE IN MICROFARAD, 0402.
2. INSTALL SHUNTS ON JP1 PIN 1 & 2, JP2 PIN 3 & 4.
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
CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CONTRACT NO.
APPROVALS
DRAWN:
TITLE: SCHEMATIC
CHECKED:
HIGH VOLTAGE SYNCHRONOUS STEP-DOWN CONTROLLER
APPROVED:
ENGINEER: DAVID C.
DESIGNER:
4
3
SIZE
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
TECHNOLOGY
KIM T.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
2
DWG NO.
DC720A-2 * LT3800EFE
Friday, March 18, 2005
SHEET
1
REV
A
1 OF 1
A
Similar pages