DC1891A - Schematic

A
B
C
D
E
75%
84%**
96%
3
4
ON
JP4
DMAX
+
OFF
D5
2
1
CIN4
33uF
63V
HVH
PDZ6.8B
4
ROSC
CC1
15nF
RC1
13.7k
3
43.2k
CSS
5
6
10nF
7
R1 12.4k
CC2
100pF
8
9
P10
R9
110k
11
RF 0
P11
12
SENSE1+
SENSE1-
PHASEMODE
RUN
FREQ
VIN
SS
INTVCC
ITH
G1
FB
PGND
SGND
G2
CLKOUT
NC
SYNC
SENSE2-
PLLFLTR
SENSE2+
R3
20
C2
2.2uF
19
845k
CU1
4.7uF
CIN1
CIN2
CIN3
4.7uF
100V
18
E2
COUT1
COUT2
COUT3
COUT4
47uF
16V
R7
OPT
R8
.005
1W
C4
10nF
R4 10
E4
E5
*
GND
* See Demo Manual
+VOUT
*
12V / 6A
GND
3
CS4
4.7uF
100V
CS3
4.7uF
100V
14
13
E3
VOUT
D2
V8P10
Q3 OPT
Q4
BSC060N10NS3G
15
+VIN
6V-60V
220uF
16V
APXE
17
16
E1
4.7uF
100V
D1
V8P10
COUT5
COUT6
R11 249k
21
4.7uF
100V
1
2
3
4
E6
Vu1
1
GND
E7
GND
E8
GND
T1 7448709060
6.8uH
+VIN
Q5
1
2
3
PBSS9110T
1
2
2
5-23-12
R18
OPT
R17
0
2
D3
PBZ6.8B
2
R19
100k
1
3
BC847T
DATE
+VIN
22
2
Vu1
Goran P.
1
CS1
R6
.005
1W
C3
10nF
D4
BAS516
R20 180k
Q7
APPROVED
4
R5
OPT
1nF
23
SLOPE
VOUT
C5
10nF
C1
24
25
CF
0.01uF
10
DMAX
BLANK
DESCRIPTION
PRODUCTION
T2 7448709060
6.8uH
3
2
R10 10
3V8
GND
3
2
+
2
REV
__
Q1 OPT
CS2
Q2
BSC060N10NS3G
U1
LTC3862EFE-2
1
ECO
2
1
JP3
SLOPE
3
2
1
JP2
BLANK
3
2
1
3
2
1
JP1
PHASE
+VIN
RUN
SW1
3
2
1
4
1.66
1.0**
0.625
325ns
250ns**
175ns
180°
120°
REVISION HISTORY
R15
10k
R13
220k
R12
33k
Q8
PMST5550
3
PMST5550
1
Q6
3
R14
56k
2
2
1
CUSTOMER NOTICE
R16
10k
Optional Bias Circuit
1
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
HZ
GORAN P.
TITLE: SCHEMATIC
LOW NOISE POLYPHASE SEPIC POWER CONVERTER
SIZE
IC NO.
N/A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
A
B
C
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
DATE:
D
REV.
LTC3862EFE-2
DEMO CIRCUIT 1891A
2
SHEET 1
Wednesday, August 01, 2012
E
OF 1
1
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