7
dc2055afa
DEMO MANUAL DC2055A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
60 DEG
90 DEG
120 DEG
GND
VIN+
VIN-
EXTVCC
DCR = 0.32m OHM
GND
744301025
IFAST1
744301025
PLLIN
DCR = 0.32m OHM
CCM
BM
PGOOD1
GND
4.5V - 14V
PS
VOUT1
TRK/SS1
BUCK CONVERTER WITH VERY LOW DCR INDUCTOR
ON
OFF
2
3
1
ENTMPB1
ON
OFF
VO1_SNS-
RUN1
1.0V / 90A
RUN1
HZ
HAORAN W.
11-12-13
TG2
SW2
BG2
TRSET2
TG2
RUN1
PGOOD1
BG2
TRSET1
TK/SS1
ILIM1
TCOMP2
TG1
VO1_SNS-
TCOMP2
TCOMP1
TRSET1
IFA
ST1
TG1
ENTMPB1
TAVG1
SW1
ITH1
BG1
SW1
VOUT1
TK/SS1
SW2
BG1
TCOMP1
TRSET2
TAVG1
VFB1
RUN
1
EXTVCC
INTVCC1
VIN
INTVCC1
INTVCC1
VIN
INTVCC1
INTVCC1
VIN
INTVCC1
VIN
VIN
EXTVCC
INTVCC1
TG2
SW2
BG2
VO1_SNS-
VO1_SNS-
VOUT1
TK/SS1
VFB1
TG1
RUN1
VOUT1
ITH1
SW1
VIN
BG1
CLKOUT1
TAVG1
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
PRODUCTION
2
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
PRODUCTION
2
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
PRODUCTION
2
__
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, November 19, 2013
13
HIGH EFFICIENCY HIGH CURRENT POLYPHASE SYNCHRONOUS
HAORAN W.
B
LTC3875EUJ
DEMO CIRCUIT 2055A
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, November 19, 2013
13
HIGH EFFICIENCY HIGH CURRENT POLYPHASE SYNCHRONOUS
HAORAN W.
B
LTC3875EUJ
DEMO CIRCUIT 2055A
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, November 19, 2013
13
HIGH EFFICIENCY HIGH CURRENT POLYPHASE SYNCHRONOUS
HAORAN W.
B
LTC3875EUJ
DEMO CIRCUIT 2055A
+
COUT2 330uF
2.5V 7343
+
COUT2 330uF
2.5V 7343
JP1
MODE
JP1
MODE
1
2
3
4
C24 OPT
C24 OPT
R3 OPT
R3 OPT
R8
OPT
R8
OPT
R6 OPTR6OPT
C2 0.1uFC20.1uF
R38 OPT
R38 OPT
R34 3.57k
1%
R34 3.57k
1%
R20
10
R20
10
J4J4
R12 715
1%
R12 715
1%
D2
CMDSH-3
D2
CMDSH-3
R40
10k
R40
10k
C19
220nF
C19
220nF
R42 OPT
R42 OPT
R5
OPT
R5
OPT
L2
0.25uH
L2
0.25uH
C7
0.1uF
C7
0.1uF
C26
OPT
C26
OPT
JP3JP3
Q4 BSC010NE2LSI
Q4 BSC010NE2LSI
3
1
2
4
5
6
7
8
C18
0.1uF
C18
0.1uF
E8E8
E12E12
R39 OPT
R39 OPT
J1
VIN
J1
VIN
C3
220nF
C3
220nF
R17
0
R17
0
R16
10
R16
10
Q3 BSC050NE2LS
Q3 BSC050NE2LS
3
1
2
4
5
6
7
8
C14 4.7uF
10V
C14 4.7uF
10V
R28
100K
R28
100K
RN2 OPT
RN2 OPT
1
2
R33
OPT
R33
OPT
E14E14
SW1SW1
1
2
3
4
5
6
E7E7
R15 2K
1%
R15 2K
1%
R32 100K
1%
R32 100K
1%
C4
220nF
C4
220nF
RN6 OPT
RN6 OPT
1
2
C6 OPTC6OPT
R23
0
R23
0
E4E4
J2J2
+
COUT5 330uF
2.5V 7343
+
COUT5 330uF
2.5V 7343
RN1 OPT
RN1 OPT
1
2
COUT7 100uF
6.3V 1210
COUT7 100uF
6.3V 1210
R4
0
R4
0
E1E1
R11 3.57k
1%
R11 3.57k
1%
R14 20k
R14 20k
+
CIN18 270uF
16V
+
CIN18 270uF
16V
1
2
+
COUT6 330uF
2.5V 7343
+
COUT6 330uF
2.5V 7343
E3E3
COUT8 100uF
6.3V 1210
COUT8 100uF
6.3V 1210
R31 OPT
R31 OPT
C5 OPT
C5 OPT
C22 1uF
C22 1uF
+
CIN1
270uF
16V
+
CIN1
270uF
16V
1
2
JP2
PHASMD1
JP2
PHASMD1
1
2
3
4
L1
0.25uH
L1
0.25uH
C9 220pF
C9 220pF
C13 1uF
C13 1uF
COUT3 100uF
6.3V 1210
COUT3 100uF
6.3V 1210
R18
2.2
R18
2.2
R7 OPTR7OPT
E13E13
R35 715
1%
R35 715
1%
Q2 BSC010NE2LSI
Q2 BSC010NE2LSI
3
1
2
4
5
6
7
8
E6E6
R13 13.3k
R13 13.3k
RN5 OPT
RN5 OPT
1
2
R22 OPT
R22 OPT
R9
3.01K
R9
3.01K
R1
20K
R1
20K
Q1 BSC050NE2LS
Q1 BSC050NE2LS
3
1
2
4
5
6
7
8
R37
10k
R37
10k
D1
CMDSH-3
D1
CMDSH-3
R27
OPT
R27
OPT
CIN5 10uF
1210
CIN5 10uF
1210
CIN3 10uF
1210
CIN3 10uF
1210
C1 OPTC1OPT
U1
LTC3875EUJ
U1
LTC3875EUJ
TK/SS1
1
2
VOSNS1-
3
ITH1
4
ITH2
5
6
VOSNS2-
7
TK/SS2
8
SNSA2+
9
IFA
ST
17
ENTMPB
18
RUN
2
16
BOOST2
22
BG2
23
EXTVCC
24
INTVCC
25
SNS2-
10
SNSD2+
11
TCOMP2
12
TAV
G
13
TRSET2
14
FRE
Q
15
VIN
26
BG1
27
BOOST1
28
TG1
29
CLKOUT
31
PHASMD
32
MODE/PLLI
N
33
RUN
1
34
ILIM
35
TRSET1
36
TCOMP1
37
SNSD1+
38
SNS
1-
39
SGND/PGND
41
TG2
21
SW1
30
SNSA1+
40
PGOOD
19
SW2
20
COUT1 100uF
6.3V 1210
COUT1 100uF
6.3V 1210
C23 OPT
C23 OPT
R10 1K
R10 1K
CIN2 10uF
1210
CIN2 10uF
1210
C8
4.7nF
C8
4.7nF
C16 220nF
C16 220nF
R43
4.99k
R43
4.99k
R2 OPTR2OPT
+
COUT4 330uF
2.5V 7343
+
COUT4 330uF
2.5V 7343
R41 OPT
R41 OPT
J3J3
CIN4 10uF
1210
CIN4 10uF
1210
E5E5
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