SC483 查看數據表（PDF） - Semtech Corporation
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SC483 Datasheet PDF : 27 Pages
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POWER MANAGEMENT
Block Diagram
VCCA1 (25)
EN/SPV1 (22)
TON1 (23)
VOUT1 (24)
POR / SS
DSCHG1
TON
DSCHG1
1
TOFF
1.5V REF
FB1 (26)
X3
PGD1 (27)
VSSA1 (28)
VCCA2 (11)
EN/SPV2 (8)
TON2 (9)
VOUT2 (10)
POR / SS
DSCHG2
TON
DSCHG2
2
TOFF
1.5V REF
FB2 (12)
X3
PGD2 (13)
VSSA2 (14)
2005 Semtech Corp.
OT
ON
OFF
PWM
CONTROL
LOGIC
OC
ZERO I
+
-
FAULT
MONITOR
OV
UV
REF + 16%
REF - 10%
REF - 30%
OT
ON
OFF
PWM
CONTROL
LOGIC
OC
ZERO I
+
-
FAULT
MONITOR
OV
UV
REF + 16%
REF - 10%
REF - 30%
FIGURE 1.
7
SC483
BST1 (7)
HI
DH1 (6)
LX1 (5)
ISENSE
LO
1
ILIM1 (4)
VDDP1 (3)
DL1 (2)
PGND1 (1)
BST2 (21)
HI
DH2 (20)
LX2 (19)
ISENSE
LO
2
ILIM2 (18)
VDDP2 (17)
DL2 (16)
PGND2 (15)
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