13
© 2009 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2677B
Load Current vs. Vcs1+ to Vout1
0
5
10
15
20
25
30
35
40
01234567
Load Current (A)
Vcs1+ to Vout1 (mV)
3.3V OCP
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
3.6
0123456
Load Current (A)
Vout2 (V)
Load Current vs.Vcs2+ to Vout2
0
5
10
15
20
25
30
35
40
0123456
Load Current (A)
Vcs2+ to Vout2 (mV)
5V OCP
0.0
1.0
2.0
3.0
4.0
5.0
6.0
01234567
Load Current (A)
Vout1 (V)
Overall System Efficiency
80
82
84
86
88
90
92
94
96
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Loading (A)
Efficiency (%
)
Io1 +Io 2
Performance (Dual output)
14
© 2009 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2677B
C39
1uF
C20
1800uF
CS1+
C4
1800uF
M7
IPD06N03LA
C10
4.7uF
R22
2.32K
DCR=4mohm
CS1+
PWRGD
C56
1800uF
R51
5.76K
C28
1uF
Enable/Disable
Circuit (option)
C59
1uF
R9
10.0K
VP1
+12V
+3.3V
D1
D1N4148
Vout1
L2
2uH
CS2-
C9
4.7uF
VP2
(1)
R24
4.87K
R48
3K
R13
4.64k
Q1
2N3904
CS1-
C24
0.1uF
C33
33nF
CS2+
M1
IPD09N03LA
R5
7.5K
C60
1nF
CS2-
C25
1uF
Enable
C63
220nF
C40
4.7uF
C62
220nF
(1)
C19
1800uF
U1
SC2677B
1
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
CS2+
CS2-
VREF
FREQ
VCC
+IN2
-IN2
COMP2
BST2
DH2
DL2
PGND BSTC
DL1
DH1
BST1
COMP1
-IN1
PHASING
SS/ENA
PWRGD
GND
CS1-
CS1+
D2
D1N4148
R19
5.9K
R35
1.0
R36
0R0
1.4V@20A
R12
300
C6
1uF
Vout
CS2+
C57
1800uF
C47
4.7uF
Note (1) : Current Scale. Master channel current weighting factor is around 0.68 * Io, Slaver is around 0.32 * Io
Q2
2N3904
VP1
D3
1N4148
+5V
D5
1N4148
R14
8.06K
L1
2uH
R21
2.1K
DCR=4mohm
M5
IPD09N03LA
C21
1nF
CS1-
C35
220nF
C36
0.1uF
C37
220nF
R11
10.0K
M3
IPD06N03LA
R31
2.2
D4
1N4148
R8
1.78K
R26
4.3K
C46
4.7uF
R10
1.00K
C43
1800uF
+12V
C1
4.7uF
C23
1uF
C38
1uF
Vout
R1
1.0
R50
6.34K
C26
47nF
VP2
Single output, Current share Mode
Evaluation Schematic (Cont.)
15
© 2009 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2677B
metIecnerefeRytitnauQnoitpircseDtraP
174C,64C,04C,01C,9C,1C6R7X,paCcimareCV61Fu7.4
275C,65C,34C,02C,91C,4C6 .paCcit
ylortcelEmunimulAV61V61/Fu0081
395C,93C,83C,82C,52C,32C,6C7R7X,paCcimareCV61Fu1
463C,42C2R7X,paCcimareCV61Fu1.0
56
2C1R7X,paCcimareCV61Fn74
633C1R7X,paCcimareCV61Fn33
736C,26C,73C,53C4R7X,paCcimareCV61Fn022
82L,1L2rotcudnImhom4/Hu2
95M,
1M2 TEFSOMlennahC-NV52AL30N90DPI
017M,3M2 TEFSOMlennahC-NV52AL30N60DPI
115D,4D,3D,2D,1D5edoiDlangiSllamS8414N1
212Q,1Q2 r
eifilpmAesopruPlareneGNPN4093N2
3153R,1R2%5MSmho1
415R1%5MSK5.7
518R1%5MSK87.1
6111R,9R2%5MSK01
7101R1%5MSK1
8121R1%5MSmho003
9131R1%5MSK
46.4
0241R1%5MSK60.8
1291R1%5MSK9.5
2212R1%5MSK1.2
3222R1%5MSK23.2
4242R1%5MSK78.4
5262R1%5MSK3.4
6213R1%5MSmho2.2
7263R1%5MSmho0
8284R1%5MSK3
9205R1%
5MSK43.6
0315R1%5MSK67.5
131U1rellortnocMWPB7762CS
Single output, Current share Mode
Evaluation Board - Bill of materials

SC2677BTETRT

Mfr. #:
Manufacturer:
Semtech
Description:
Switching Controllers DUAL SYNCH VOLT MODE CONTROLLR
Lifecycle:
New from this manufacturer.
Delivery:
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