LT3791-1 Просмотр технического описания (PDF) - Linear Technology
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LT3791-1 Datasheet PDF : 26 Pages
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LT3791-1
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
C/10 Threshold vs Temperature
1.200
1.175
1.150
RISING
1.125
1.100
FALLING
1.075
1.050
1.025
1.000
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
37911 G19
Supply Current vs Input Voltage
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
TA = 150°C
TA = 25°C
TA = –50°C
10 20 30 40 50 60
VIN (V)
37911 G22
Oscillator Frequency
vs Temperature
800
700
RT = 29.1k
600
500
RT = 59.0k
400
300
RT = 147k
200
100
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
37911 G25
OVLO Threshold vs Temperature
3.3
3.2
3.1
RISING
3.0
2.9
FALLING
2.8
2.7
2.6
2.5
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
37911 G20
EN/UVLO Pin Current
8
VEN/ULO = 1V
7
6
5
4
3
2
1
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
37911 G23
TG1, TG2 Minimum On-Time
vs Temperature
100
TG2
90
80
TG1
70
60
50
40
30
20
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
37911 G26
Soft-Start Current vs Temperature
16
14
CHARGING
12
10
8
6
4
2
DISCHARGING
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
37911 G21
EN/UVLO Threshold Voltage
1.30
1.28
1.26
1.24
1.22
RISING
1.20
1.18
FALLING
1.16
1.14
1.12
1.10
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
37911 G24
TG1, TG2 Minimum Off-Time
vs Temperature
350
300
fSW = 200kHz
250
fSW = 400kHz
200
150
fSW = 700kHz
100
50
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
37911 G27
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37911fa
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