LP3954 Datasheet, PDF (22/60 Pages) National Semiconductor (TI) – Advanced Lighting Management Unit

LP3954
SNVS340D – JUNE 2005 – REVISED MARCH 2013
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
BANDPASS
LOWPASS
HIPASS
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
kHz
Figure 14. Higher frequency mode
MODE_CTRL = 00 and SYNC_MODE = 1
www.ti.com
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
BANDPASS
LOWPASS
HIPASS
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
kHz
Figure 15. Lower frequency mode
MODE_CTRL = 01 and SYNC_MODE = 1
MODE CONTROL IN AMPLITUDE MODE
During the amplitude synchronization mode user can select between three different amplitude mappings by
using MODE_CTRL select. These three mapping option gives different light response. The modes are shown in
the tables below.
100
90
BLUE
GREEN
80
RED
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100
INPUT AMPLITUDE (%)
Figure 16. Non-overlapping mode
MODE_CTRL[1:0] = [01]
100
90
BLUE
80
GREEN RED
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100
INPUT AMPLITUDE (%)
Figure 17. Partly overlapping mode
MODE_CTRL[1:0] = [00]
22
Submit Documentation Feedback
Product Folder Links: LP3954
Copyright © 2005–2013, Texas Instruments Incorporated