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| LM3555TLE Datasheet, PDF (10/33 Pages) Texas Instruments – LM3555 Synchronous Boost Converter with 500 mA High Side LED Driver and Dual-Mode Control Interface | |||
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LM3555
SNVS594E â JANUARY 2009 â REVISED NOVEMBER 2011
Typical Characteristics (continued)
Unless otherwise specified: TA = 25°C; VIN = 3.6V; CIN1= 10 µF, CIN2= 0.1 µF, COUT = 11 µF; L = 2.2 µH.
80mA Torch Current
One LED @ 60mA
vs
LED Efficiency
Input Voltage
vs
1 LED
Input Voltage
100
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0.100
0.095
0.090
0.085
0.080
0.075
0.070
0.065
0.060
TA = +85°C TA = +25°C
TA = -30°C
2.5
100
VLED (V) = 3.0V
3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
One LED @ 80mA
LED Efficiency
vs
Input Voltage
90
TA = +25°C
80
TA = -30°C
70
60
50
TA = +85°C
VLED (V) = 3.0V
40
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
Indicator Current
vs
Input Voltage
Tri-Temp
12.5 VIND = 2.0V, Code 3
11.5
TA = +85°C
10.5
TA = -30°C
9.5
TA = +25°C
8.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
90
TA = +25°C
80
TA = -30°C
70
60
50
TA = +85°C
VLED (V) = 3.0V
40
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
Indicator Current
vs
Input Voltage
Brightness Codes
VIND = 2.0V, TA = 25°C
15.0
12.5
10.0
Code 3
7.5
5.0
Code 2
2.5
Code 1
0.0
Code 0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
Indicator Current
vs
Input Voltage
VLED
VLED = 1.8V
12.5
11.5
10.5
9.5
8.5
7.5
6.5
5.5
4.5
3.5
2.5
VLED = 2.0V
VLED = 2.4V
TA = +25°C, Code 3
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
10
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Copyright © 2009â2011, Texas Instruments Incorporated
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