W2RF004RM Datasheet, PDF (6/10 Pages) Omron Electronics LLC – Most Suitable IC for Controlling LED Effects within Applications

Lighting Data (9 bits)
spd(4)
spd(3)
Lighting speed
spd(2)
Lighting data light_dat (8:0)
spd(1)
spd(0)
brt(3)
Lighting gradation
brt(2)
brt(1)
brt(0)
Lighting is controlled in each line with the values of the load registers. In lighting control, the gradation changes to the specified one at the specified lighting speed
The Lighting speed follows the table below.
The change time is specified with 5 bits;
Lighting Speed
spd(4:0)
Change time per 1/15
(4) (3) (2) (1) (0)
of brightness
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
Less than 60 μs
8.5 ms
10.7 ms
12.8 ms
14.9 ms
17.1 ms
21.3 ms
25.6 ms
29.9 ms
34.1 ms
42.7 ms
51.2 ms
59.7 ms
68.3 ms
85.3 ms
102 ms
119 ms
137 ms
171 ms
205 ms
239 ms
273 ms
341 ms
410 ms
478 ms
546 ms
683 ms
819 ms
956 ms
1,092 ms
1,365 ms
1,638 ms
Change time from
0/15 to 15/15 of
brightness
(and vice versa)
Less than 1 ms
0.128 s
0.160 s
0.192 s
0.224 s
0.256 s
0.320 s
0.384 s
0.448 s
0.512 s
0.640 s
0.768 s
0.896 s
1.024 s
1.280 s
1.536 s
1.792 s
2.048 s
2.560 s
3.072 s
3.584 s
4.096 s
5.120 s
6.144 s
7.168 s
8.192 s
10.24 s
12.29 s
14.34 s
16.38 s
20.48 s
24.58 s
The Lighting gradation follows the table below.
The brightness is specified with 4 bits;
Lighting Gradation
brt(3:0)
(3) (2) (1) (0)
Brightness
0000
0/15
(light OFF)
0001
1/15
0010
2/15
0011
3/15
0100
4/15
0101
5/15
0110
6/15
0111
7/15
1000
8/15
1001
9/15
1010
10/15
1011
11/15
1100
12/15
1101
13/15
1110
14/15
1
1
1
1
15/15
(Light completely ON)
PWM duty ratio
(reference)
0%
0.42 %
0.84 %
1.25 %
1.78 %
2.61 %
3.76 %
5.42 %
7.96 %
11.3 %
16.7 %
23.3 %
35.2 %
48.4 %
73.4 %
100 %
Note: The change time per 1/15 of brightness represents the time required
for a change from, for example, 10/15 to 11/15 of brightness.
The change time from 0/15 to 15/15 of brightness and vice versa rep-
resents the time required for a change from 0/15 of brightness (light
OFF) to 15/15 of brightness (light completely ON). However, these
times are median values and depend on the driving output PWM cycle.
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LED Control IC W2RF004RM