DC1244A - Schematic

A
B
C
D
E
REVISION HISTORY
VIN
ECO
REV
C4 IS FOR DEMO BOARD TEST ONLY
VIN
2.2
C36
2.2uF
100V
+
C4
100uF/63V
R31
IntVcc
OPT
SYNC
C6
0.1uF
R24
100k
Vout2
5
Vout1
R28
0 Ohm
EXTVCC
Mode/PLLIN
27
R25
OPT
IntVcc
R1
MODE
100k (OPT)
GND
1
6
BURST
3
PGOOD1
PGND
21
IntVCC
19
JP1
ExtVcc
Vout1
C21
4.7uF
16V
12
C13
470pF
ITH1
1
R10
20K
13
ITH2
C10
1nF
C11
100pF
OPT
14
RUN2
R20
9
0 Ohm
10
TK/SS2
TK/SS1
RUN1
8
Sense1-
4
RUN2
Sense2-
28
RUN1
0 Ohm
C12
2.2pF
11
Sense1+
Sense2+
3
R21
VIN
R14
VIN
100
16
SW2
SW1
25
BG1
23
Boost1
24
TG1
4
Q1
RJK0651DPB
17
Boost2
D6
OPT
4
R30
2
4
Q4
RJK0651DPB
D5
VOUT1
1
2
3
2
E6
C16
470uF/6.3V
R29
2
IntVcc
C25
0.1uF
Q6
OPT
Vout1
L1
4.7uH
BG1
5
BG2
RS1
0.008
4
C18
0.1uF
D3
OPT
4
1
2
3
18
SGND
3
2
1
BG2
3
2
1
E4
26
7
C24
10uF
GND
TG1
3
2
1
C23
1uF
TG2
L2
8.0uH
5
+
15
5
8.5V @ 3A
TG2
RJK0651DPB
0.01
C2
2.2uF
100V
5
5
100
4
Q3
C1
330uF/10V
C7
0.01uF
R13
C20
2.2pF
RS2
3
R7
OPT
C19
0.01uF
C3
2.2uF
100V
31.6k
R6
OPT
R17
OPT
C9
OPT
R12
Vout2
C14
OPT
R16
3
2
R15
34.8K
Vout1
10.5k
VFB1
3.3V @ 5A
+
5
R11
VFB2
Q2
RJK0651DPB
C15
10uF
C17
1uF
GND
1
2
3
C8
OPT
E7
0
100k
100k
VOUT2
R5
R9
R8
Vout2
E5
FCM
2
E10 R33
OPT
0
4
41.2K
IntVcc
20
R4
E3
IntVcc
1K
R_PROG
LTC3890EGN-1
Vin
E9
Vout2
R32
U1
FREQ
E2
22
C35
2.2uF
100V
PGOOD
2
DATE
VICTOR KH. 10-05-09
R3
C34
2.2uF
100V
4
APPROVED
PRODUCTION
IntVcc
E1
4.5V UP TO 60V
GND
DESCRIPTION
4
Q5
OPT
E8
D4
DFLS1100
DFLS1100
VIN
1
NOTE: FOR SKIP MODE
OPERATION INSTALL R1
AND REMOVE JP1
RUN1
1
ON
2
R22
JP4
R26
OPT
1
ON
RUN1
3
OFF
RUN2
OPT
C32
OPT
2
R23
1 Meg
CUSTOMER NOTICE
RUN2
3
OFF
JP3
R27
C33
OPT
OPT
CONTRACT NO.
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
A
B
C
D
APPROVALS
TECHNOLOGY
PCB DES. ANTONINA K.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
ENG. VICTOR KH. TITLE: SCHEMATIC
LOW QUIESCENT CURRENT
DUAL OUTPUT HIGH VOLTAGE STEP-DOWN CONVERTER
SIZE
A
DATE:
IC NO.
REV
LTC3890EGN-1
4
DEMO CIRCUIT 1244A
Wednesday, March 03, 2010
SHEET
E
1 OF 1
1
Similar pages