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SC2441AEVB 数据表(PDF) 9 Page - Semtech Corporation

部件名 SC2441AEVB
功能描述  1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
PDF  37 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC2441AEVB 数据表(HTML) 9 Page - Semtech Corporation

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9
 2006 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2441A
Block Diagram
Figure 4 Details of Soft-Start and Overload Hiccup Control Circuit
OL
(OVERLOAD)
0.5V/3.3V
S
Q
R
DSBL
FB
SS/EN
+
0.35V
-
+
0.8V
-
S
Q
R
UV = “1” IF VCC < 4.5V
TURN OFF
GATEDRIVES
RSS
VCC
SHDN
UV
SHDN = “1” IF SYNC/SHDN < 0.5V
TGON
FAULT
Soft-Start and
Overload
Hiccup Control
Figure 2
CSS
Q1
C1
C2
C3
L1
L2
HICCUP
DISABLE
10
µA
Figure 3. Step-up Converter Functional Diagram
FB3
SW3
COMP3
EA3
SLOPE
COMP
+
R
Q
S
PWM3
CLK
-
+
-
+
+
1.25V
+
-
ISEN3
ILIM3
+
-
I-LIMIT
Σ
26
27
7
8
RSENSE
PGND2



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