SC2647 Semtech Corporation, SC2647 Datasheet - Page 6

• Manufacturer Part Number: SC2647
• Description: Multi-Platform Multi-Phase PWM Controller
• Manufacturer: Semtech Corporation

www.DataSheet4U.com
© 2006 Semtech Corp.
POWER MANAGEMENT
Block Diagram
DACSTEP
BGOUT
GNDSEN
OUTSEN
OSCREF
VID0
VID1
VID2
VID3
VID4
VID5
OS1
OS2
OS3
OS4
FB
4
6
24
23
17
14
13
12
11
10
15
3
2
1
8
7
OUTSEN
OUTSEN
BGOUT
DAC
BUFFER
VID0
VID1
VID2
VID3
VID4
VID5
OSCILLATOR
ROSC
+
-
+
-
+
-
+
-
+
-
OUT
C/A1
C/A2
C/A3
C/A4
Ramp
DROOP
OSC
11111
INHIBIT
OUT
OUT
OUT
OUT
VDAC
VCC
R
OUT
VBG
R
+
-
2R
R
BANDGAP
VCC
GSEN
R
VREF
-
+
2R
0
OUT
R
Errout
+
-
+
-
+
-
+
-
6
PWM1
PWM2
PWM3
PWM4
VBG
-
+
OUT
OUT
OUT
OUT
CLOCK DIVIDER
E/A
CLK
SEL3
OUT
BGOUT
P1
P2
P3
P4
Power Good Threshold
3 PHASE
SELECT
OCP &
SHUTDOWM
UVLO &
LATCH
ERROUT
R
S
R
S
R
S
R
S
Q
Q
Q
Q
PWR_GOOD
OUT
+
-
DRV1
DRV2
DRV3
DRV4
OUT
+
-
0
3/4 Phase selection
Threshold
0
www.semtech.com
SC2647
19
20
21
22
16
5
9
18
OUT1
OUT2
OUT3
OUT4
PWRGD
ERROUT
VCC
AGND