LT3745 데이터 시트보기 (PDF) - Linear Technology
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LT3745 Datasheet PDF : 28 Pages
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LT3745
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
Oscillator Frequency fOSC
vs Temperature
520
510
500
490
480
–50
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3745 G19
FB Regulation Voltage
vs Load Current
1.216
1.214
1.212
1.210
1.208
1.206
1.204
0
200 400 600 800 1000 1200
LOAD CURRENT (mA)
3745 G20
LED Regulation Voltage
vs Load Current
0.72
0.70
0.68
0.66
0.64
0.62
0.60
0
200 400 600 800 1000 1200
LOAD CURRENT (mA)
3745 G21
Soft-Start Charge Current ISS
vs Temperature
–10.0
–10.2
–10.4
–10.6
–10.8
–11.0
–50
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3745 G22
Current Sense Threshold vs VISN
60
55
50
T = 25°C
45 T = 125°C
40
T = –40°C
35
0
10
20
30
40
VISN (V)
3745 G23
CAP Bias Voltage (VIN - VCAP)
vs VIN
6.90
6.86
T = 125°C
6.82
T = 25°C
6.78
6.74
T = –40°C
6.70
0 10 20 30 40 50 60
VIN (V)
3745 G24
CAP Bias Voltage (VIN - VCAP)
vs ICAP
6.90
6.80
T = 25°C
6.70
T = –40°C
6.60
6.50
T = 125°C
6.40
6.30
6.20
04
8 12 16
ICAP (mA)
20 24
3745 G25
VISET Pin Voltage vs Temperature
1.210
1.208
1.206
1.204
1.202
1.200
–50
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3745 G26
3745f
9
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