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SC2545 データシートの表示(PDF) - Semtech Corporation

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SC2545 Datasheet PDF : 24 Pages
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SC2545
POWER MANAGEMENT
Block Diagram (One PWM channel shown)
ROSC
Oscillator
Ramp
generator
Ramp1
CLK1
3+
2
-
PWM 1
ERROUT
FB
SS
FB
+
OUT-
R
0.75V
R
-
E/A
OUT
+ Clamp
0.65V
+
-
OUT
UVLO
VCC
VIN
VCC
ENABLE
EN
AGND
ON/OFF
VCC
UVLO
Band
10V
Gap 1
LDO
S
Q
R
PVCC
Protect 1
PHASE1
PVCC
Protect 1
BST
DRVH
PHASE
PVCC
DRVL
R
Protect 1
S /Q
-
OCP
OUT
+
+ FB1
OVP
OUT
-
0.89V
0.75V
Band
Gap 2
0.75V 0.675V
+
FB1
-
OUT
OVP
FB2
-
VCC
10u A
ILIM
PWRGD
OCP
© 2005 Semtech Corp.
7
www.semtech.com

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