LM3553 Datasheet, PDF (14/26 Pages) National Semiconductor (TI) – 1.2A Dual Flash LED Driver System with I2C Compatible

LM3553
SNVS414B – FEBRUARY 2008 – REVISED MAY 2013
Safety Timer Duration Code (Binary)
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
www.ti.com
Typical Safety Timer Duration (milliseconds)
600
700
800
900
1000
1100
1200
1300
1400
3200
Table 3. LM3553 Functionality Truth Table
EN1
EN0
F_EN
T_X
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
Result
Shutdown
Shutdown
Flash
Torch
Indicator
Indicator
Flash
Torch
Torch
Torch
Flash
Torch
Flash
Torch
Flash
Torch
FEN
TX
STATE
on
off
on
off
flash
torch
off
Safety
Timer
Figure 19. FEN Terminated Pulse
14
Submit Documentation Feedback
Product Folder Links: LM3553
Copyright © 2008–2013, Texas Instruments Incorporated