Linear Technology DC2055A, Demo Manual

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8
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
RUN2
DCR = 0.32m OHM
744301025
IFAST2
744301025
DCR = 0.32m OHM
PGOOD2 VOUT2
VO2_SNS-
ON
RUN2
CLKOUT
TRK/SS2
BUCK CONVERTER WITH VERY LOW DCR INDUCTOR
GND UP TO 30A
OFF
DUAL-OUTPUT
CONFIG
L4
R86
R85
4.64k
931
0.33uF/0.32mOHM
744301033
ON OFF
2 3 1 ENTMPB2
C58
R88 10k
1.5nF
R83
R84
30.1k
20k
R79
R68
00
VOUT2 = 1.5V
HZ
TG4 SW4 BG4
TRSET4
TG4
PGOOD2
BG4
TRSET3
TK/SS2
ILIM2
VOUT1
TCOMP4
TG3
TCOMP4
TCOMP3
TRSET3
IFA ST2
CLKOUT
TG3
ITH2
SW3
ITH1
BG3
SW3
VOUT2
SW4
BG3
TCOMP3
TRSET4
TAVG2
ENTMPB2
TAVG2
EXTVCC
INTVCC2
INTVCC2 VIN
INTVCC2
INTVCC2
VIN
INTVCC2
VIN
VIN
INTVCC2
TG4 SW4 BG4
VOUT1
TK/SS2
VFB2
TG3
RUN2
VO2_SNS-
VOUT2
SW3
ITH2
BG3
VO2_SNS-
ITH1
VO1_SNS-
VFB1
TK/SS1
RUN1 CLKOUT1
TAVG2
VIN
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
23
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
23
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
23
HIGH EFFICIENCY HIGH CURRENT POLYPHASE SYNCHRONOUS
HAORAN W.
B
LTC3875EUJ
DEMO CIRCUIT 2055A
R92 OPT R92 OPT
R64
0
R64
0
+
COUT18 330uF 2.5V 7343
+
COUT18 330uF 2.5V 7343
R77 3.57k 1% R77 3.57k 1%
R85 715 1% R85 715 1%
L3
0.25uH
L3
0.25uH
R89
OPT
R89
OPT
E23E23
RN4 OPT RN4 OPT
1 2
E33E33
JP4JP4
Q13 BSC010NE2LSI Q13 BSC010NE2LSI
3
1
2
4
5
6
7
8
C56 1uF C56 1uF
J14J14
E27E27
C38 0.1uFC380.1uF
C59 OPT C59 OPT
R93 OPT R93 OPT
R80
3.01K
R80
3.01K
R78
10k
R78
10k
JP6
PHASMD2
JP6
PHASMD2
1
2
3
4
C57
220pF
C57
220pF
R65 OPT R65 OPT
COUT13 100uF
6.3V 1210
COUT13 100uF
6.3V 1210
CIN15 10uF 1210 CIN15 10uF 1210
Q16 BSC050NE2LS Q16 BSC050NE2LS
3
1
2
4
5
6
7
8
U3
LTC3875EUJ
U3
LTC3875EUJ
TK/SS1
1 2
VOSNS1-
3
ITH1
4
ITH2
5 6
VOSNS2-
7
TK/SS2
8
SNSPAC2
9
IFA ST
17
ENTMPB
18
RUN 2
16
BOOST2
22
BG2
23
EXTVCC
24
INTVCC
25
SNSN2
10
SNSPDC2
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
SNSPDC1
38
SNSN1
39
SGND/PGND
41
TG2
21
SW1
30
SNSPAC1
40
PGOOD
19
SW2
20
R96 OPT R96 OPT
CIN14 10uF 1210 CIN14 10uF 1210
R90 OPT R90 OPT
R88
OPT
R88
OPT
R62
2.2
R62
2.2
R81 1K R81 1K
R97 OPT R97 OPT
D3
CMDSH-3
D3
CMDSH-3
+
COUT16 330uF 2.5V 7343
+
COUT16 330uF 2.5V 7343
CIN16 10uF 1210 CIN16 10uF 1210
CIN13 10uF 1210 CIN13 10uF 1210
C62 220nF C62 220nF
C48 OPT C48 OPT
COUT20 100uF 6.3V 1210 COUT20 100uF 6.3V 1210
R94 OPT R94 OPT
RN7 OPT RN7 OPT
1 2
E28E28
R44
4.99k
R44
4.99k
R73 OPT R73 OPT
C58 OPT C58 OPT
R91
OPT
R91
OPT
+
COUT14 330uF 2.5V 7343
+
COUT14 330uF 2.5V 7343
D4
CMDSH-3
D4
CMDSH-3
R86 3.57k 1% R86 3.57k 1%
C49 OPT C49 OPT
C54 OPT C54 OPT
C37
OPT
C37
OPT
R74 OPT R74 OPT
SW2SW2
1
2
3
4
5
6
C63 OPT C63 OPT
R101
10k
R101
10k
J16J16
C52
220nF
C52
220nF
L4
0.25uH
L4
0.25uH
R70 715 1% R70 715 1%
Q15 BSC010NE2LSI Q15 BSC010NE2LSI
3
1
2
4
5
6
7
8
R83 OPTR83OPT
R75 OPT R75 OPT
C44 220nF C44 220nF
C60 4.7uF 10V C60 4.7uF 10V
C42 0.1uF C42 0.1uF
R87
100K
R87
100K
R84 OPT R84 OPT
R76 OPT R76 OPT
Q14 BSC050NE2LS Q14 BSC050NE2LS 3
1
2
4
5
6
7
8
R99 100K 1% R99 100K 1%
RN8 OPT RN8 OPT
1 2
C46
220nF
C46
220nF
R60
0
R60
0
C43 0.1uF C43 0.1uF
R82
0
R82
0
E24E24
COUT19 100uF
6.3V 1210
COUT19 100uF
6.3V 1210
+
COUT17 330uF 2.5V 7343
+
COUT17 330uF 2.5V 7343 R68
OPT
R68
OPT
R63 OPT R63 OPT
RN3 OPT RN3 OPT
1 2
E29E29
R79
OPT
R79
OPT
C55 OPT C55 OPT
COUT15 100uF
6.3V 1210
COUT15 100uF
6.3V 1210
R69 OPT R69 OPT
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