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LM3822 датащи(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали LM3822
подробное описание детали  Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output
Download  12 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3822 датащи(HTML) 10 Page - National Semiconductor (TI)

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Look-Up Tables
The following tables show how to convert the duty cycle of
the PWM output to a current value, and vice versa. The
quantization error of 12 bit is not shown in these tables.
Please see the “PWM Output and Current Accuracy” section
for more details.
TABLE 1. Current to Duty Cycle Conversion Table
Sense Current
(Imax = 1.0A)
Sense Current
(Imax = 2.0A)
Duty Cycle (%)
1
2
95.5
0.95
1.90
93.2
0.90
1.80
90.9
0.85
1.70
88.6
0.80
1.60
86.4
0.75
1.50
84.1
0.70
1.40
81.8
0.65
1.30
79.5
0.60
1.20
77.3
0.55
1.10
75.0
0.50
1
72.7
0.45
0.90
70.5
0.40
0.80
68.2
0.35
0.70
65.9
0.30
0.60
63.6
0.25
0.50
61.4
0.20
0.40
59.1
0.15
0.30
56.8
0.10
0.20
54.5
0.05
0.10
52.3
0.00
0.00
50
−0.05
−0.10
47.7
−0.10
−0.20
45.5
−0.15
−0.30
43.2
−0.20
−0.40
40.9
−0.25
−0.50
38.6
−0.30
−0.60
36.4
−0.35
−0.70
34.1
−0.40
−0.80
31.8
−0.45
−0.90
29.5
−0.50
−1
27.3
−0.55
−1.10
25
−0.60
−1.20
22.7
−0.65
−1.30
20.5
−0.70
−1.40
18.2
−0.75
−1.50
15.9
−0.80
−1.60
13.6
−0.85
−1.70
11.4
−0.90
−1.80
9.1
−0.95
−1.90
6.8
−1
−2
4.5
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10


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