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Número de pieza
componentes Descripción
LT3420 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT3420
Photoflash Capacitor Chargers with Automatic Refresh
Linear Technology
LT3420 Datasheet PDF : 20 Pages
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BLOCK DIAGRA S
V
BAT
C1
DONE
8
CT
10
REFRESH
TIMER
Q5
C3
BLOCK
ENABLE
Q
MASTER
Q
LATCH
S
R
CHARGE
V
CC
C2
9
ONE-
SHOT
4
V
CC
CHIP
ENABLE
V
BAT
C1
DONE
8
CT
10
REFRESH
TIMER
Q5
C3
BLOCK
ENABLE
Q
MASTER
Q
LATCH
S
R
CHARGE
V
CC
C2
9
ONE-
SHOT
4
V
CC
CHIP
ENABLE
LT3420/LT3420-1
R1
R2
V
BAT
R
FB
R
REF
2
31
D3
Q3
Q2
ONE-
SHOT
RSQ
DRIVER
A1
Q4
A3
A2
1V
REFERENCE
POWER DELIVERY BLOCK
Figure 3. Block Diagram, LT3420
R1
R2
V
BAT
R
FB
R
REF
2
31
D3
Q3
ONE-
SHOT
RSQ
DRIVER
A1
Q4
A3
A2
1V
REFERENCE
POWER DELIVERY BLOCK
Figure 4. Block Diagram, LT3420-1
T1
1:12
PRIMARY
D1
SECONDARY
V
OUT
SW
6
C4
+
PHOTOFLASH
CAPACITOR
Q1
20mV
+–
0.014
Ω
10mV
+–
0.25
Ω
5
GND
7
SEC
LT3420
3420 F03
T1
1:10
PRIMARY
D1
SECONDARY
V
OUT
SW
6
C4
+
PHOTOFLASH
CAPACITOR
Q1
20mV
+–
0.02
Ω
10mV
+–
0.66
Ω
5
GND
7
SEC
LT3420-1
3420 F04
3420fa
7
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