LT3476IUHF 查看數據表（PDF） - Linear Technology
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LT3476IUHF Datasheet PDF : 14 Pages
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LT3476
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
V(CAP-LED) Threshold vs VADJ
150
TA = 25°C
120
90
60
Current Limit vs Duty Cycle
2.5
TYPICAL
2
MINIMUM
1.5
1
Oscillator Frequency vs RT
10000
1000
30
0.5
0
0
0.3
0.6
0.9
1.2
1.5
VADJ (V)
3476 G01
V(CAP-LED) Threshold
vs Temperature, VADJ = VREF
108
107
106
105
104
103
102
–45 –20
5 30 55 80 105 130
TEMPERATURE (°C)
3476 G04
0
0
20
40
60
80 100
DUTY CYCLE (%)
3476 G02
Switch Current Limit
vs Temperature
2.5
2
1.5
1
0.5
0
–45 –20
5 30 55 80
TEMPERATURE (°C)
105 130
3476 G05
100
1
10
100
RT (kΩ)
1000
3476 G03
Oscillator Frequency
vs Temperature
1150
RT = 21k
1100
1050
1000
950
900
850
–45 –20
5 30 55 80
TEMPERATURE (°C)
105 130
3476 G06
Reference Voltage
1.065
1.060
1.055
1.050
1.045
1.040
–45 –20
5 30 55 80
TEMPERATURE (°C)
105 130
3476 G07
V(CAP-LED) Threshold vs V(CAP)
108
VADJ = 1.05V
107
106
105
104
103
102
0
5 10 15 20 25 30 35
VCAP (V)
3476 G08
Quiescent Current
25
PWM 1-4 = 3.6V
20
15
VC = GND, NOT SWITCHING
TA = 25°C
10
PWM 1-4 = 0V
5
0
0
4
8
12
16
VIN (V)
3476 G09
3476fb
4
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