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| LM3555TLE Datasheet, PDF (9/33 Pages) Texas Instruments – LM3555 Synchronous Boost Converter with 500 mA High Side LED Driver and Dual-Mode Control Interface | |||
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LM3555
www.ti.com
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.
Single LED
One LED @ 500mA
Flash Current
LED Current
vs
vs
Brightness Code
0.60
0.55
Input Voltage
0.60
0.58
VLED = 3.6V
0.50
TA = -30°C and +25°C
0.56
0.45
0.40
0.35
0.30
TA = +85°C
0.54
0.52
0.50
0.48
TA = -30°C
TA = +25°C
0.25
0.46
0.20
0.44
TA = +85°C
0.15
0.42
0.10
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0.40
2.5 3.0 3.5 4.0 4.5 5.0 5.5
BRC (#)
One LED @ 500mA
Input Current
vs
Input Voltage
1.30
VLED = 3.6V
ILED = 500 mA
1.12
VIN (V)
One LED @ 500mA
LED Efficiency
vs
Input Voltage
100
VLED (@ 500 mA) = 3.6V
90
TA = -30°C
0.94
TA = +25°C
0.76
TA = -30°C
0.58
TA = +85°C
0.40
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
Torch Current
vs
Brightness Code
1 LED
80
70
TA = +85°C
TA = +25°C
60
50
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
60mA Torch Current
vs
Input Voltage
1 LED
0.20
0.18
TA = -30°C, +25°C, +85°C
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
VIN (V) = 3.6V, VLED (V) = 3.0V
01234567
BRCTORCH (#)
0.080
0.075
0.070
0.065
0.060
0.055
0.050
0.045
0.040
TA = +85°C
TA = -30°C
TA = +25°C
VLED (V) = 3.0V
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
Copyright © 2009â2011, Texas Instruments Incorporated
Product Folder Links: LM3555
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