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SC1408 Scheda tecnica(PDF) 6 Page - Semtech Corporation

Il numero della parte SC1408
Spiegazioni elettronici  LOW VOLTAGE, BOOST DC-DC CONTROLLER
PDF  12 Pages
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Produttore elettronici  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC1408 Scheda tecnica(HTML) 6 Page - Semtech Corporation

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© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
LOW VOLTAGE, BOOST DC-DC
CONTROLLER
SC1408
August 22, 2000
6
Fig. 3: Achieving output voltages greater than 16.5V
+
C3
100uF
25V OUT
Q1
IRL3103S
L1
22uH
D3
12V
3.3V IN
D1
B130T
+
C8
100uF
R4
10.0k
U1
SC1408IS
8
1
2
3
4
5
6
7
ISENSE
GATE
BST
FB
SHDN
REF
AGND
GND
R2
0.05Ohm
R6
470
C4
0.1uF
R3
200k
+
C2
100uF
D4
1N4148
C5
0.1uF
Fig. 4: Implementing shutdown with input/output isolation
R3
90k
3.3V IN
U1
SC1408IS
8
1
2
3
4
5
6
7
ISENSE
GATE
BST
FB
SHDN
REF
AGND
GND
L1
22uH
+
C2
100uF
+
C3
100uF
12V OUT
C5
0.1uF
D1
B130T
C4
0.1uF
R2
0.05Ohm
J1
1
2
R5
5.1k
Q1
IRLL3303
SHORT = RUN
OPEN = SHUTDOWN
+
C8
100uF
R4
10.0k
Q2
Si2301DS



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