sc1146csw.tr Semtech Corporation, sc1146csw.tr Datasheet - Page 6

• Manufacturer Part Number: sc1146csw.tr
• Description: Vrm9.0 Programmable, Multi-phase, High Performance Pwm Controller
• Manufacturer: Semtech Corporation

J1
10
11
12
13
14
15
16
1
2
3
4
5
6
INPUT
9
C11
Vout/Clk switch
S1
BY JUMPERING JMP1, ALL SC1405'S ARE ENABLED AND
DISABLED TOGETHER WITH SC1144. THREE OF THE SC1405'S
CAN BE DIRECTLY CONTROLLED BY SEPARATING THE TWO
ENABLES. (power saving mode)
ENSYN
JMP1
C12
8
7
6
5
4
3
2
1
C13
EN
+12V
Freq. set by R22
Freq.=(8.2K/R22)*2Mhz
Phase
C8
TBD
R18
.01
C45
100
R19
R4
10K
.1
C46
R5
10K
10
R1
R6
10K
R7
10K
sel
R22
R33
10K
10
11
12
SMOD
1
2
3
4
5
6
7
8
9
per
5v
Divsel
Clksel
Extclk
Rref
Vid0
Vid1
Vid2
Vid3
Vid4
OC+
OC-
SC1146
U2
Long PCB Trace
Power Good
Pwrgood
Enable
Comp
Bgout
Drv3
Drv1
Vcc2
Drv0
Drv2
GND
FBG
FB
2.2
R25
24
23
22
21
20
19
18
17
16
15
14
13
EN
.1u
C42
22
R9
22
R8
22
R11
22
R13
open
R24
VOUT
Open
R15
10K
R20
.001
C43
R32
3k
.1u
C47
1
R21
JMP2
C37
47pf
C16
47pf
C26
47pf
47pf
C44
EN
*
TBD
R27
.1
C48
8
3
7
2
4
6
1
5
8
3
7
2
4
6
1
5
8
3
7
2
4
6
1
5
8
3
7
2
4
6
1
5
Vcc
GND
PRDY
EN
CO
DELAY_C
OVP_S
S_MOD PGND
Vcc
GND
PRDY
EN
CO
DELAY_C
OVP_S
S_MOD PGND
Vcc
GND
PRDY
EN
CO
DELAY_C
OVP_S
S_MOD PGND
Vcc
GND
PRDY
EN
CO
DELAY_C
OVP_S
S_MOD PGND
R26 AND R27 SET THE OVERVOLTAGE TRIP
POINT. C48 SETS THE TIME CONSTANT.
R27=0,R26=OPEN to disable OVP_S.
Shipped with OVP_S disabled
SC1405B
SC1405B
SC1405B
SC1405B
U1
U3
U4
U5
*
0
R26
DSPS_DR
DSPS_DR
DSPS_DR
DSPS_DR
DRN
DRN
DRN
DRN
BST
BST
BST
BST
TG
BG
TG
BG
TG
BG
TG
BG
14
13
12
9
11
10
14
13
12
9
11
10
14
13
12
9
11
10
14
13
12
9
11
10
SS12
R28
0
R29
0
R30
0
R31
0
D1
.1u
SS12
D2
.1u
C22
SS12
D3
C31
.1u C40
.1u
SS12
D4
C9
.1u C50
.1u
C18
.1u
C27
.1u
C35
.1u
C49
10u,16V
C19
10u,16V
C28
10u,16V
C36
R2
0
R3
0
R10
R12
0
R14
0
R16
0
R17
R23
0
0
0
FDP6035
FDB7030
FDP6035
FDB7030
FDP6035
FDB7030
FDP6035
Q8
FDB7030
Q1
Q2
Q3
Q4
Q5
Q6
Q7
30BQ015
30BQ015
30BQ015
30BQ015
D5
D6
D7
D8
PID1103-1u
PID1103-1u
PID1103-1u
PID1103-1u
L1
L3
L5
L7
22u,10V
C1
22u,10V
C6
22u,10V
C10
22u,10V
C15
22u,10V
C17
22u,10V
C20
22u,10V
C21
22u,10V
C24
22u,10V
C25
22u,10V
C29
22u,10V
C30
22u,10V
C33
22u,10V
C34
22u,10V
C38
C39
1000uf,6.3
C51
1000uf,6.3