 English |
|
|
|
|
|
|
|
| LM3555TLE Datasheet, PDF (7/33 Pages) Texas Instruments – LM3555 Synchronous Boost Converter with 500 mA High Side LED Driver and Dual-Mode Control Interface | |||
| |||
| ◁ |
LM3555
www.ti.com
SNVS594E â JANUARY 2009 â REVISED NOVEMBER 2011
Typical Characteristics
Unless otherwise specified: TA = 25°C; VIN = 3.6V; CIN1= 10 µF, CIN2= 0.1 µF, COUT = 11 µF; L = 2.2 µH.
Two Series LEDs
Two Series LEDs @ 320mA
Flash Current
LED Current
vs
vs
Brightness Code
Input Voltage
0.50
0.48
0.46
0.44
TA = -30°C and +25°C
0.42
0.40
0.38
0.36
0.34
0.32
TA = +85°C
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0.35
0.34
VLED = 6.75V (2 LEDs)
0.33
TA = +25°C
0.32
0.31
0.30
TA = -30°C
TA = +85°C
0.29
2.5 3.0 3.5 4.0 4.5 5.0 5.5
BRC (#)
Two Series LEDs @ 320mA
Input Current
vs
Input Voltage
1.50
VLED = 6.75V (2 LEDs)
1.25
ILED = 320 mA
TA = -30°C
1.00
TA = +25°C
0.75
0.50
VIN (V)
Two Series LEDs @ 320mA
LED Efficiency
vs
Input Voltage
100
TA = -30°C
90
80
TA = +25°C
TA = +85°C
70
TA = +85°C
0.25
0.00
2.5 3.0 3.5 4.0 4.5 5.0 5.5
60
VLED (@ 320 mA) = 6.75V (2 LEDs)
50
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
Two Series LEDs @ 400mA
LED Current
vs
Input Voltage
0.44
VLED = 6.9V (2 LEDs)
0.43
0.42
VIN (V)
Two Series LEDs @ 400mA
Input Current
vs
Input Voltage
2.00
VLED = 6.9V (2 LEDs)
1.70
TA = +85°C ILED = 400mA
0.41
TA = +25°C
0.40
0.39
0.38
0.37
TA = -30°C
TA = +85°C
1.40
1.10
0.80
TA = -30°C
TA = +25°C
0.36
2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.50
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
VIN (V)
Copyright © 2009â2011, Texas Instruments Incorporated
Product Folder Links: LM3555
Submit Documentation Feedback
7
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese