参数资料
型号: PCF8536AT/1,118
厂商: NXP Semiconductors
文件页数: 68/74页
文件大小: 0K
描述: IC LCD DRIVER LOW MPLEX 56TSSOP
特色产品: NXP - I2C Interface
标准包装: 1
显示器类型: LED,LCD
配置: 7段 + DP,14段 + DP + AP,点阵
接口: I²C
数字或字符: 20 字符,40 字符,320 元件
电源电压: 1.8 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 56-TFSOP(0.240",6.10mm 宽)
供应商设备封装: 56-TSSOP
包装: 标准包装
其它名称: 568-8447-6
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18. Appendix: possible PWM and LCD frame frequency combinations to avoid flicker
Table 49.
LCD and PWM frame frequency combinations to avoid flicker [1]
Experiments have shown that likely no flicker occurs when PWM frame frequency and LCD frame frequency are between 40 Hz and 50 Hz apart
and no flicker occurs if they are more than 50 Hz apart.
frame frequencies
PWM (f PWM )
LCD (f fr(LCD) )
59.9
70.5
79.9
90.4
99.8
108.9
119.8
129.5
140.9
149.7
159.7
171.1
177.5
184.3
191.7
199.7
208.3
217.8
228.2
239.6
252.2
266.2
281.9
299.5
59.9
0.0
10.6
20.0
29.4
20.0
10.9
0.0
9.7
21.1
29.9
20.0
8.6
2.2
4.6
12.0
20.0
28.6
21.8
11.4
0.0
12.6
26.6
17.6
0.0
69.1
9.2
1.4
10.8
21.3
30.7
29.3
18.4
8.7
2.7
11.5
21.5
32.9
29.9
23.0
15.7
7.7
1.0
10.5
20.8
32.3
24.2
10.2
5.4
23.0
81.7
21.8
11.2
1.8
8.7
18.2
27.2
38.1
33.8
22.4
13.6
3.6
7.8
14.1
20.9
28.3
36.3
36.7
27.2
16.9
5.4
7.2
21.2
36.8
27.2
89.8
29.9
19.4
10.0
0.6
10.0
19.1
29.9
39.7
38.8
29.9
20.0
8.6
2.2
4.6
12.0
20.0
28.6
38.1
41.4
29.9
17.3
3.3
12.3
29.9
99.8
20.0
29.4
20.0
9.4
0.0
9.1
20.0
29.7
41.1
49.9
39.9
28.5
22.2
15.4
8.0
0.0
8.7
18.2
28.5
39.9
47.3
33.3
17.6
0.0
112.3
7.5
28.6
32.4
21.9
12.5
3.4
7.5
17.2
28.6
37.4
47.4
53.5
47.1
40.3
32.9
25.0
16.3
6.8
3.6
15.0
27.6
41.6
55.1
37.4
119.8
0.0
21.1
39.9
29.4
20.0
10.9
0.0
9.7
21.1
29.9
39.9
51.3
57.7
55.3
47.9
39.9
31.3
21.8
11.4
0.0
12.6
26.6
42.3
59.9
128.3
8.6
12.6
31.4
37.9
28.5
19.4
8.6
1.2
12.6
21.4
31.4
42.8
49.1
55.9
63.3
57.0
48.4
38.9
28.5
17.1
4.5
9.5
25.2
42.8
138.2
18.4
2.7
21.5
42.6
38.4
29.3
18.4
8.7
2.7
11.5
21.5
32.9
39.2
46.1
53.4
61.4
68.1
58.6
48.3
36.9
24.2
10.2
5.4
23.0
149.7
29.9
8.8
10.0
31.1
49.9
40.8
29.9
20.2
8.8
0.0
10.0
21.4
27.7
34.6
41.9
49.9
58.6
68.1
71.3
59.9
47.3
33.3
17.6
0.0
163.4
16.3
22.4
3.6
17.5
36.3
54.5
43.6
33.8
22.4
13.6
3.6
7.8
14.1
20.9
28.3
36.3
45.0
54.5
64.8
76.2
74.5
60.5
44.8
27.2
179.7
0.0
31.7
20.0
1.1
20.0
38.1
59.9
50.2
38.8
29.9
20.0
8.6
2.2
4.6
12.0
20.0
28.6
38.1
48.5
59.9
72.5
86.5
77.5
59.9
199.7
20.0
11.7
39.9
18.8
0.0
18.2
39.9
59.4
58.7
49.9
39.9
28.5
22.2
15.4
8.0
0.0
8.7
18.2
28.5
39.9
52.5
66.6
82.2
99.8
224.6
15.0
13.2
15.0
43.8
25.0
6.8
15.0
34.4
57.3
74.9
64.9
53.5
47.1
40.3
32.9
25.0
16.3
6.8
3.6
15.0
27.6
41.6
57.3
74.9
256.7
17.1
25.2
17.1
14.5
42.8
38.9
17.1
2.3
25.2
42.8
62.7
85.6
79.2
72.4
65.0
57.0
48.4
38.9
28.5
17.1
4.5
9.5
25.2
42.8
299.5
0.0
17.6
20.0
28.3
0.0
27.2
59.9
40.5
17.6
0.0
20.0
42.8
55.5
69.1
83.9
99.8
91.1
81.7
71.3
59.9
47.3
33.3
17.6
0.0
[1]
The table shows the smallest distance ( ? f) from one frequency to the next or multiples of the next. ? f = MIN(f1 ? n ? f2); the values for n are 1 to 6; f1 and f2 can be either f PWM or
f fr(LCD) ; both relationships have to be considered. A PWM frame frequency (f PWM ) of less than 60 Hz may show flicker purely from the LCD.
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