SC2646B Semtech Corporation, SC2646B Datasheet - Page 6

• Manufacturer Part Number: SC2646B
• Description: Combi-Sense PWM Controller
• Manufacturer: Semtech Corporation

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© 2005 Semtech Corp.
POWER MANAGEMENT
Block Diagram
MSENSE
OUTSEN
OSCREF
BGOUT
GSENSE
VID0
VID1
VID2
VID3
VID4
VID5
OS1
OS2
OS3
OS4
FB
24
23
17
14
13
12
11
10
15
3
2
1
8
7
4
6
OUTSEN
OUTSEN
BGOUT
BUFFER
DAC
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
OUT
I_DAC
R
+
-
VREF
VCC
ERROUT
+
-
+
-
+
-
+
-
+
-
CLOCK DIVIDER
0.8*VBG
6
PWM1
PWM2
PWM3
PWM4
-
+
OUT
OUT
OUT
OUT
VBG
E/A
CLK
SEL3
OUT
PWR_GOOD
BGOUT
P1
P2
P3
P4
+
-
3 PHASE
SELECT
OUT
OCP &
SHUTDOWM
UVLO &
LATCH
ERROUT
R
S
R
S
R
S
R
S
DELAY
Q
Q
Q
Q
OUT
DRV1
DRV2
DRV3
DRV4
+
-
4.2V
SC2646B
19
20
21
22
www.semtech.com
16
5
9
18
OUT1
OUT2
OUT3
OUT4
PWRGD
ERROUT
VCC
AGND