Analog Devices DC2881A-A, Руководство пользователя

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15
DEMO MANUAL DC2881A-A
Rev. 0
SCHEMATIC DIAGRAM
5 5
4 4
3 3
2 2
1 1
D
D
C
C
B
B
A
A
NOTES:
1. L1
an
d L2
pla
ne
s ca
n ac
co
mm
od
ate F
P0
70
7R1
-R1
10
-R.
ST
UFF FOR TW
O-PHA
SE SI
NGLE OUT
PUT
CONFI
GURA
TI
ON
RE
V
DE
SC
RIP
TION
AP
PR
OV
ED
DA
TE
EC
O
RE
VIS
ION
HIST
OR
Y
12-20-21
YT
PR
OD
U
C
TI
ON
3
KELVIN CONNECT R3 AND R4 TO R1 AND R159
PLACE R173 AS CLOSE TO L1 AS POSSIBLE
+
-
-
+
KELVIN CONNECT JP13 TO C220
VI
N2 EF
F
-
KELVIN CONNECT JP15 TO L2 VIA NEAR CENTER OF L2
+
VOUT
2
EF
F
-
KELVIN CONNECT JP12 TO C26
+
FI
LTERED
SW
1
VOUT
1
EF
F
KELVIN CONNECT JP16 TO C217
KELVIN CONNECT JP14 TO L1 VIA NEAR CENTER OF L1
-
VI
N1 EF
F
+ + -
U2
- A
*
VERS
ION
LTC70
50
- B
LTC70
50
-1
- C
LTC70
50
P
7V
-14V
1V
/30A
1V
/30A
IM
ON1
IR
EF
IR
EF
IM
ON2
# of Outputs
TA
BL
E T
O
DET
ER
M
IN
E I
DEA
L Vsen
se L
IN
ES
# of Phases per Output
Load Step on
R194, R195
R5, R16
R40, R219
R43, R220
2 2 2 1
1 1 1 2
None
VOUT1 VOUT2
Any
0 Ohms
OPT
0 Ohms
OPT
0 Ohms 0 Ohms
0 Ohms
0 Ohms 0 Ohms
0 Ohms
OPT OPT
OPT OPT
OPT OPT
Re
mo
ve
th
es
e ju
mp
ers
fo
r e
fficie
ncy
m
ea
sure
me
nt
At
C
OU
T4
2
At
C
OU
T4
0
At
C
22
7
At
C
22
7
BLEEDER LOAD
S
Re
mo
ve
th
es
e re
sisto
rs
fo
r e
fficie
ncy
m
ea
sure
me
nt
KELVIN CONNECT TO COUT42 KELVIN CONNECT TO COUT40
KELVIN CONNECT TO C227
VOUT
R
M
T
- +
VI
N
VDD2
5
EX
TV
CC
INT
VCC
1
VDD
25
VDD
33
VI
N
VIN1
VIN1
VDD
33
VDD
33
VDD
33
VDD
33
VDD
33
VDD
33
VO
U
T1
VO
U
T2
VIN1
GN
D_P
OW
ER
VO
U
T2
VC
C
VC
C
IR
EF
VD
R
VO
U
T1
VC
C
VC
C
FI
LT
ERED_SW
1
IR
EF
GN
D_P
OW
ER
VIN1
GN
D_P
OW
ER
VO
U
T2
VIN1
GN
D_P
OW
ER
FI
LT
ERED_SW
1
GN
D_P
OW
ER
VO
U
T1
VIN1
GN
D_P
OW
ER
SGN
D1
SGN
D1
SGN
D1
SGN
D1
SGN
D1
SGN
D1
SGN
D1
SGN
D1
TMON
VI
N
VIN2
STEP
_LED
VO
U
T1
VO
U
T2
VDD
33
VO
U
T1
VO
U
T2
VLOAD
SH
ARE_CLK
SYN
C
ALERT
B
RUN
1
FAULT
1
SCL SDA
PGOOD1 PGOOD2
FAULT
2
ITH
_R2
ITH
_R1
FAULT
2
FAULT
1
ITH
2
ITH
1
RUN
2
RUN
1
RUN
2
PW
M
0
VSEN
SE2+
SW
2
ISNS2
+
ISNS2
-
VSEN
SE2-
VSEN
SE1+
SW
1
ISNS1
+
ISNS1
-
VSEN
SE1-
FLTB2
FLTB1
EN2
EN1
PGOOD2
PGOOD1
DA
TE:
SHEE
T
OF
TITLE:
SC
HEMA
TIC
AP
PR
OVALS
PCB DE
S.
AP
P E
NG
.
SIZE:
SCH
EMATIC
N
O. AN
D
REVI
SION:
CUS
TO
M
ER
NO
TICE
THIS CIRCUIT
IS PROPRIET
ARY T
O ANALOG DEVICE
S AND
SUPP
LIED FOR USE W
ITH A
NAL
OG
DEVICE
S P
ART
S.
SKU
N
O.
IC
N
O.
ANAL
OG DEVICES
HAS MADE A BEST
EF
FORT T
O DESIGN A
CIRCUIT T
HAT
M
EE
TS CUS
TOM
ER-SUP
PL
IED
SP
ECIF
ICATIONS
; HO
WEV
ER, IT RE
MAINS THE
CUST
OM
ER'S
RES
PONSIBIL
ITY
TO VE
RIFY
PROPE
R AND REL
IABLE
OPERAT
ION I
N THE
ACTU
AL
APPL
ICATION. COM
PONENT
SUBS
TITUT
ION AND PRINTE
D CIRCUIT BOARD L
AYOUT
MAY SIGNIFICANT
LY AF
FECT
CIRCUIT PE
RF
ORM
ANCE
OR REL
IABILIT
Y. CONTACT
ANAL
OG DEVICES
APP
LICATIONS
ENGINEER
ING FOR ASSIS
TANCE.
25
55
AUGUSTI
NE DRIVE
ww
w.a
na
log
.co
m
AN
ALO
G
DE
VICE
S
AHEAD OF
WHAT'
S POS
SIBLE
TM
SANTA CL
ARA, CA 9
50
54
1
3
LT YT
LTC7
05
0X /
LTC3
88
4R
HE-1
HIGH EF
FICIENCY S
YNCHRONOUS BUCK CONVE
RTER WIT
H PSM
DC
28
81
A(A,B
,C)
71
0-DC
28
81
A(A
,B,C)_
RE
V0
3
N/
A
Mond
ay
, Dec
emb
er
20
, 20
21
DA
TE:
SHEE
T
OF
TITLE:
SC
HEMA
TIC
AP
PR
OVALS
PCB DE
S.
AP
P E
NG
.
SIZE:
SCH
EMATIC
N
O. AN
D
REVI
SION:
CUS
TO
M
ER
NO
TICE
THIS CIRCUIT
IS PROPRIET
ARY T
O ANALOG DEVICE
S AND
SUPP
LIED FOR USE W
ITH A
NAL
OG
DEVICE
S P
ART
S.
SKU
N
O.
IC
N
O.
ANAL
OG DEVICES
HAS MADE A BEST
EF
FORT T
O DESIGN A
CIRCUIT T
HAT
M
EE
TS CUS
TOM
ER-SUP
PL
IED
SP
ECIF
ICATIONS
; HO
WEV
ER, IT RE
MAINS THE
CUST
OM
ER'S
RES
PONSIBIL
ITY
TO VE
RIFY
PROPE
R AND REL
IABLE
OPERAT
ION I
N THE
ACTU
AL
APPL
ICATION. COM
PONENT
SUBS
TITUT
ION AND PRINTE
D CIRCUIT BOARD L
AYOUT
MAY SIGNIFICANT
LY AF
FECT
CIRCUIT PE
RF
ORM
ANCE
OR REL
IABILIT
Y. CONTACT
ANAL
OG DEVICES
APP
LICATIONS
ENGINEER
ING FOR ASSIS
TANCE.
25
55
AUGUSTI
NE DRIVE
ww
w.a
na
log
.co
m
AN
ALO
G
DE
VICE
S
AHEAD OF
WHAT'
S POS
SIBLE
TM
SANTA CL
ARA, CA 9
50
54
1
3
LT YT
LTC7
05
0X /
LTC3
88
4R
HE-1
HIGH EF
FICIENCY S
YNCHRONOUS BUCK CONVE
RTER WIT
H PSM
DC
28
81
A(A,B
,C)
71
0-DC
28
81
A(A
,B,C)_
RE
V0
3
N/
A
Mond
ay
, Dec
emb
er
20
, 20
21
DA
TE:
SHEE
T
OF
TITLE:
SC
HEMA
TIC
AP
PR
OVALS
PCB DE
S.
AP
P E
NG
.
SIZE:
SCH
EMATIC
N
O. AN
D
REVI
SION:
CUS
TO
M
ER
NO
TICE
THIS CIRCUIT
IS PROPRIET
ARY T
O ANALOG DEVICE
S AND
SUPP
LIED FOR USE W
ITH A
NAL
OG
DEVICE
S P
ART
S.
SKU
N
O.
IC
N
O.
ANAL
OG DEVICES
HAS MADE A BEST
EF
FORT T
O DESIGN A
CIRCUIT T
HAT
M
EE
TS CUS
TOM
ER-SUP
PL
IED
SP
ECIF
ICATIONS
; HO
WEV
ER, IT RE
MAINS THE
CUST
OM
ER'S
RES
PONSIBIL
ITY
TO VE
RIFY
PROPE
R AND REL
IABLE
OPERAT
ION I
N THE
ACTU
AL
APPL
ICATION. COM
PONENT
SUBS
TITUT
ION AND PRINTE
D CIRCUIT BOARD L
AYOUT
MAY SIGNIFICANT
LY AF
FECT
CIRCUIT PE
RF
ORM
ANCE
OR REL
IABILIT
Y. CONTACT
ANAL
OG DEVICES
APP
LICATIONS
ENGINEER
ING FOR ASSIS
TANCE.
25
55
AUGUSTI
NE DRIVE
ww
w.a
na
log
.co
m
AN
ALO
G
DE
VICE
S
AHEAD OF
WHAT'
S POS
SIBLE
TM
SANTA CL
ARA, CA 9
50
54
1
3
LT YT
LTC7
05
0X /
LTC3
88
4R
HE-1
HIGH EF
FICIENCY S
YNCHRONOUS BUCK CONVE
RTER WIT
H PSM
DC
28
81
A(A,B
,C)
71
0-DC
28
81
A(A
,B,C)_
RE
V0
3
N/
A
Mond
ay
, Dec
emb
er
20
, 20
21
C11 22uF 1206
J5
VO
U
T1
U2
LT
C7050AV
PGND
19
SW
1
5
TDIO
36
SW
1
4
PGND
39
PGND
40
SW
1
1
PGND
18
PGND
17
PGND
41
VIN
21
VIN
37
VIN
20
ISNS1
33
PWM1
35
SW
1
2
FLTB1
34
VIN
38
SW
1
42
VIN
43
SW
1
6
PGND
7
PGND
8
PGND
9
SW
2
10
SW
2
11
SW
2
12
SW
2
13
SW
2
14
SW
2
15
SW
2
16
RUN
1
32
SGND
31
VC
C
30
PVC
C
29
PVC
C
28
PGND
27
RUN
2
26
ISNS2
25
FLTB2
24
PWM2
23
TMON
22
SW
1
3
R161 43.2k
R47
O
PT
2010
R2
1
1%
+
COUT
7
470uF
7343 2.5V
+
COUT
4
470uF
7343 2.5V
J1
VI
N
R85 27.4 2512
E2
VIN-
C207
47pF
JP1
6
1 2
R198 O
PT
R45
O
PT
C219 22uF 1206
C1
2.2uF
COUT
6
47uF 1210
R214
O
PT
R114 O
PT
JP2
0
VD
R
ST
EP
_LED
EN
STEP
1 2
COUT
40
47uF 1210
R186
0
C222
6800p
F
C206 1uF
C7
1uF
C12
100pF
R25
O
PT
R31
O
PT
R199
O
PT
R34 10K
JP1
9
VI
N
VIN2
EN
AUX
1 2
R172
0
C6
4.7uF
R23
O
PT
R46
O
PT
R195
0
+
C
IN2
270uF
16V
R179
0
R191
0
COUT
26
O
PT
R171
0
C225 3300p
F
J8
VOU
T1
C209 10uF 16V
R178 O
PT
R223
0
C187
47pF
+
C
IN1
270uF
16V
J6
G
ND
R28
O
PT
JP1
ON
OFF
WP
1 3 2
R9 4.99k
R203 O
PT
R159 O
PT
2512
JP1
3
1 2
C17 0.01uF
R42
O
PT
C213 22uF 1206
R10 10K
R35
O
PT
C210 O
PT
C26 O
PT
R8 10K
R200 27.4 2512
R11 1k
COUT
1
47uF 1210
C215 22uF 1206
C14 0.01uF
R173 O
PT
R14 O
PT
R225 150
COUT
43
47uF 1210
C5
O
PT
+
COUT
3
470uF
7343 2.5V
R177
0
R5
0
C10 22uF 1206
C183
47pF
C220 0.1uF
R204 O
PT
Q2
MM
ST
3906-
7-F
3 2
1
C217 0.1uF
R180 O
PT
R38
O
PT
R202
O
PT
C15 1uF 16V R185
10K
JP1
4
1 2
R12 1k
J2
G
ND
Q1
MM
ST
3906-
7-F
3 2
1
L1
215nH
PA2607
.211N
L
R27
O
PT
C218 22uF 1206
C208 47pF
E4
VOU
T2-
COUT
5
47uF 1210
R32
O
PT
+
COUT
8
470uF
7343 2.5V
R39
O
PT
R184
0
R222
0
R30 10K
C4
4.7uF
R194
0
C16 O
PT
R20 O
PT
E38
PW
M
2
C211 O
PT
R40
O
PT
E5
VOU
T1+
J3
VO
U
T2
E37
PW
M
1
R182
10K
R44
O
PT
2010
C205 1uF
R219
O
PT
R193 10K
R43
O
PT
J4
G
ND
R41
O
PT
2010
C9 O
PT
R22
O
PT
E3
VOU
T2+
R183
1
C13
6800p
F
R29 10K
JP1
5
1 2
R170 43.2k
R37
O
PT
R181
10K
U1
LT
C3884-RHE
-1
PW
M
0
45
NC
46
VC
C
0
44
IIN-
48
PGND
42
VC
C
1
37
NC
35
ITH
_R0
6
SYN
C
12
SCL
13
SDA
14
ALERT
B
15
SH
ARE_CLK
28
RUN
0
18
RUN
1
19
ITH
_R1
31
ITH
1
30
TSN
S0
11
TSN
S1
10
ASEL
0
20
ASEL
1
21
VDD33
29
ITH
0
7
WP
27
VDD25
26
IIN+
47
FAULT
0
16
FAULT
1
17
NC
43
ISENS
E0+
8
VOU
T1_CF
G
23
VSEN
SE0-
3
VSEN
SE0+
2
ISENS
E0-
9
VSEN
SE1+
33
ISENS
E1-
5
ISENS
E1+
4
NC
38
VOU
T0_CF
G
22
VSEN
SE1-
32
GND
49
FR
EQ_CFG
24
PH
ASE_
CF
G
25
PGOOD1
34
PGOOD0
1
PW
M
1
36
INTVC C
39
VIN
40
EX
TV
CC
41
GND
50
GND
51
GND
52
GND
53
C212 22uF 1206
JP1
8
1 2
JP2
1
1 2
R48
O
PT
2010
L2
215nH
PA2607
.211N
L
R3 0
R156
O
PT
R26
O
PT
JP1
2
1 2
R113 O
PT
C214 22uF 1206
R13 1k
R4 0
R1 0.001 2512
COUT
37
O
PT
J9
VOU
T2
R190
0
R201 O
PT
R16
0
R220
O
PT
COUT
42
47uF 1210
R6 10K
COUT
2
47uF 1210
C226 3300p
F
R187
10K
C8 22uF 1206
R224 150
C221
100pF
JP1
7
1 2
E6
VOU
T1-
E1
VIN+
COUT
41
47uF 1210
C3
2.2uF
R36
O
PT
C216 22uF 1206
R192 10K
ASEL
0
ASEL
1
VOU
T0_CF
G
VOU
T1_CF
G
SCL
SDA
FR
EQ_CFG
ALERT
B
PH
ASE_
CF
G
W
P1
SH
ARE_CLK SYN
C
RUN
1
ITH
_R2
ITH
2
VSEN
SE2+
VSEN
SE2-
VSEN
SE1+
VSEN
SE1-
RUN
2
ITH
_R1
ITH
1
TSN
S0
PW
M
1
SW
2
EN2
RUN
2
RUN
1
SW
1
EN1
PW
M
0
TSN
S0
ISNS2
+
ISNS2
-
ISNS1
-
ISNS1
+