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LT3420 Datasheet(PDF) 4 Page - Linear Technology

Part # LT3420
Description  Photoflash Capacitor Chargers with Automatic Refresh
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3420 Datasheet(HTML) 4 Page - Linear Technology

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LT3420/LT3420-1
4
3420fa
Output Voltage in Refresh Mode,
LT3420-1
TEMPERATURE (
°C)
–50
100
3420 G04
050
335
330
325
320
315
310
305
300
295
–25
25
75
125
FIGURE 2 CIRCUIT
VCC = 3.3V
VBAT = 3.3V
VIN (V)
2.5
5.5
3420 G05
5.0
3.0
4.0
3.5
4.5
6.0
FIGURE 2 CIRCUIT
VCC = VIN
VBAT = VIN
TA = 25°C
335
330
325
320
315
310
305
300
295
VBAT (V)
2
6
3420 G06
3
4
5
10
8
6
4
2
0
FIGURE 2 CIRCUIT
VOUT CHARGED
FROM 50V TO 320V
TA = 25°C
COUT = 100µF
COUT = 40µF
Output Voltage in Refresh Mode,
LT3420-1
Charge Pin Input Current
Primary Current Limit, LT3420
Secondary Current Limit, LT3420
Charge Time, LT3420-1
CHARGE PIN VOLTAGE (V)
2
10
8
6
4
2
0
57
10
3420 G07
34
6
89
TA = 25°C
TEMPERATURE (
°C)
–50
3420 G08
0
50
100
1.7
1.5
1.3
1.1
0.9
–25
25
75
125
TEMPERATURE (
°C)
–50
100
3420 G09
050
60
55
50
45
40
35
30
25
20
–25
25
75
125
Efficiency of Figure 1 Circuit,
LT3420
Primary Current Limit, LT3420-1
Secondary Current Limit, LT3420-1
3420 G10
90
80
70
60
50
40
VOUT (V)
100
200
300
50
150
350
250
VCC = VBAT = VIN
VIN = 3.3V
VIN = 5V
TA = 25°C
TEMPERATURE (
°C)
–50
3420 G11
0
50
100
1.2
1.1
1.0
0.9
0.8
–25
25
75
125
TEMPERATURE (
°C)
–50
100
3420 G12
050
35
30
25
20
15
10
5
–25
25
75
125
Graphs apply to both the LT3420 and LT34201-1 unless otherwise noted.
TYPICAL PERFOR A CE CHARACTERISTICS



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