RT9271 Просмотр технического описания (PDF) - Richtek Technology
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RT9271 Datasheet PDF : 15 Pages
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RT9271
Typical Operating Characteristics
Efficiency vs. VIN (Driving 1 WLED)
92
TA = 25°C
91
90
89
88
87
IO = 20mA
86
IO = 15mA
85
84
83
82
2
2.5
3
3.5
4
VIN (V)
Efficiency vs. VIN (Driving 3 WLEDs)
90
TA = 25°C
89
88
87
86
85
IO = 20mA
84
83
IO = 15mA
82
81
80
2
3
4
5
6
VIN (V)
VFB vs. Temperature
260
Driving 3 WLEDs
VIN = 3.6V
255
250
245
240
235
230
0
10 20 30 40 50 60 70
Temperature (°C)
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6
Efficiency vs. VIN (Driving 2 WLEDs)
90
TA = 25°C
89
88
87
86
IO = 20mA
85
84
83
IO = 15mA
82
81
80
2
3
4
5
6
VIN (V)
Frequency vs. VIN
1.3
Driving 3 WLEDs
TA = 25°C
1.2
1.1
1
0.9
0.8
0.7
2
3
4
5
6
VIN (V)
VIN vs. Temperature
3
2.8
2.6
3 WLEDs
2.4
2.2
Minimum Input Voltage vs. Temperature
for Delivering Full Brightness
2
20
30
40
50
60
70
Temperature (°C)
DS9271-13 March 2007
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