LM3555TLE Datasheet, PDF (15/33 Pages) Texas Instruments – LM3555 Synchronous Boost Converter with 500 mA High Side LED Driver and Dual-Mode Control Interface

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Block Diagram
LM3555
SNVS594E – JANUARY 2009 – REVISED NOVEMBER 2011
TORCH
STROBE
I²C/EN
SCL/EN1
SDA/EN2
V_IN
IND
PGND
SGND
I²C INTERFACE/
CONTROL LOGIC/
REGISTERS
TORCH CTRL
FLASH CTRL
TIME-OUT CTRL
Current
Control
LED
Open/Short
Detect
VREF
THERMAL
SHUTDOWN
LM3555
RC
CC
OVP/Short
Detect
SWITCH
CONTROLLER
OSC
2MHz
RAMP
¦
IC
SW
Driver
0.3V
-
+
SW
Driver
CURRENT
LIMIT
gm
VLED
V_OUT
SW
Application Circuit Component List
Component
Manufacturer
L
COUT
CIN1
CIN2
TOKO
Murata
Murata
Murata
Value
2.2 µH
11 µF
10 µF
0.1 µF
Part-Number
FDS0312-2R2M
GRM219R61A116UE82B
GRM188R60J106UE82B
GRM155R61C104KA88B
Current/Voltage Rating
(Resistance)
ISAT = 2.3A (0.2Ω)
10V
6.3V
16V
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