LT3782AIFE Просмотр технического описания (PDF) - Linear Technology
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LT3782AIFE Datasheet PDF : 20 Pages
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LT3782A
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Switching Frequency vs RFREQ
600
Reference Voltage
vs Temperature
2.446
Current Limit Threshold
vs Temperature
70
500
2.444
67
2.442
400
64
2.440
300
61
2.438
200
2.436
58
100
0
20 40 60 80 100 120 140 160 180 200
RFREQ (kΩ)
3782A G04
2.434
0
25 50 75 100 125 150
JUNCTION TEMPERATURE (°C)
3782A G05
55
–45 –20
5 30 55 80
TEMPERATURE (°C)
105 130
3782A G10
VGBIAS vs IGBIAS at Start-Up
(Charging 2μF)
14
800
12
VGBIAS
700
10
600
8
500
6
400
4
300
IGBIAS
2
200
0
100
–2
0
250μ
500μ
TIME (s)
0
750μ
1m
3782A G06
SGATE (Low) to BGATE (High)
Delay vs VDELAY (RSET = 80k)
1000
900
800
700
600
500
400
300
200
100
0
0
0.5 1.0 1.5 2.0 2.5
VDELAY (V)
3782A G07
Switching Frequency
vs Duty Cycle
105
100
95
90
85
80
100
200 300 400 500 600
SWITCHING FREQUENCY (kHz)
3782A G08
Maximum Duty Cycle Limit
vs VDCL (RSET = 80k)
120
110
100
90
80
70
60
50
40
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4
VDCL (V)
3782A G09
3782af
5
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