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| LM3555TLE Datasheet, PDF (12/33 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.
Flash Timeout Time
vs
Flash Timeout Code
1k
950
900
850
800
750
700
650
600
550
500
450
400
350
300
250
200
150
100
50
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
FTO (#)
Startup - 2 LEDs
I2C Mode
IIN
(500 mA/DIV)
ILED
(200 mA/DIV)
VOUT
(2V/DIV)
VLED
(2V/DIV)
Time
(100 Ps/DIV)
Ramp-Down - 2 LEDs
I2C Mode
Ramp-Down (Zoom) - 2 LEDs
I2C Mode
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IIN
(500 mA/DIV.)
ILED
(200 mA/DIV)
VOUT
(2V/DIV)
VLED
(2V/DIV)
IIN
(1A/DIV)
VOUT
(5V/DIV)
VLED
(5V/DIV)
ILED
(100 mA/DIV)
Time
(800 Ps/DIV)
Startup 2 LEDs
Simple Mode
Time
(200 Ps/DIV)
IIN
(200 mA/DIV)
ILED
(100 mA/DIV)
Time
(100 Ps/DIV)
Ramp-Down 2 LEDs
Simple Mode
IIN
(1A/DIV)
VOUT
(5V/DIV)
VLED
(5V/DIV)
ILED
(100 mA/DIV)
Time
(200 Ps/DIV)
12
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