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AS3677 データシート(PDF) 30 Page - ams AG

部品番号 AS3677
部品情報  Triple Channel Lighting Management Unit with DCDC step/up, ALS, 2xDLS(=DBC) and RGB Driver
PDF  68 Pages
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メーカー  AMSCO [ams AG]
ホームページ  http://www.ams.com
Logo AMSCO - ams AG

AS3677 データシート(HTML) 30 Page - ams AG

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AS3677
Datasheet - D e ta i l e d D e s c r i p t i o n
An overflow of the internal bus (8 Bits wide to the IDAC) has to be avoided by the register settings (currX_current +
currX_adder must not exceed 255).
Note:
The adder logic operates independent of the currX_mode setting, but its main purpose is to work together with
the pwm modulator (improved up/down dimming)
If the adder logic is not used anymore, set the bit currX_adder to 0. (Setting adder_currentX to 0 is not suffi-
cient)
At the end of up/down dimming, the pwm_code register keeps its final value (for up-dimming 255 and for down-
dimming 0). This can be used to identify the exact time, when up/down dimming is finished.
Table 36. PWM Dimming Table
Decrease by 1/4th
every step
Decrease by 1/8th
every step
Seconds
Seconds
Seconds
Seconds
Step
%Dimming
PWM
%Dimming
PWM
50msec/
Step
25msec/
Step
5msec/
Step
2.5msec/
Step
1
100,0
255
100,0
255
0,00s
0,00s
0,000s
0,000s
2
75,3
192
87,8
224
0,05s
0,03s
0,005s
0,003s
3
56,5
144
76,9
196
0,10s
0,05s
0,010s
0,005s
4
42,4
108
67,5
172
0,15s
0,08s
0,015s
0,008s
5
31,8
81
59,2
151
0,20s
0,10s
0,020s
0,010s
6
23,9
61
52,2
133
0,25s
0,13s
0,025s
0,013s
7
18,0
46
45,9
117
0,30s
0,15s
0,030s
0,015s
8
13,7
35
40,4
103
0,35s
0,18s
0,035s
0,018s
9
10,6
27
35,7
91
0,40s
0,20s
0,040s
0,020s
10
8,2
21
31,4
80
0,45s
0,23s
0,045s
0,023s
11
6,3
16
27,5
70
0,50s
0,25s
0,050s
0,025s
12
4,7
12
24,3
62
0,55s
0,28s
0,055s
0,028s
13
3,5
9
21,6
55
0,60s
0,30s
0,060s
0,030s
14
2,7
7
19,2
49
0,65s
0,33s
0,065s
0,033s
15
2,4
6
16,9
43
0,70s
0,35s
0,070s
0,035s
16
2,0
5
14,9
38
0,75s
0,38s
0,075s
0,038s
17
1,6
4
13,3
34
0,80s
0,40s
0,080s
0,040s
18
1,2
3
11,8
30
0,85s
0,43s
0,085s
0,043s
19
0,8
2
10,6
27
0,90s
0,45s
0,090s
0,045s
20
0,4
1
9,4
24
0,95s
0,48s
0,095s
0,048s
21
0,0
0
8,2
21
1,00s
0,50s
0,100s
0,050s
22
7,5
19
1,05s
0,53s
0,105s
0,053s
23
6,7
17
1,10s
0,55s
0,110s
0,055s
24
5,9
15
1,15s
0,58s
0,115s
0,058s
25
5,5
14
1,20s
0,60s
0,120s
0,060s
26
5,1
13
1,25s
0,63s
0,125s
0,063s
27
4,7
12
1,30s
0,65s
0,130s
0,065s
28
4,3
11
1,35s
0,68s
0,135s
0,068s
29
3,9
10
1,40s
0,70s
0,140s
0,070s



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