參數(shù)資料
型號(hào): LM3812
廠商: National Semiconductor Corporation
英文描述: Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
中文描述: 精密電流計(jì)IC,與超低的失落感元素和PWM輸出
文件頁數(shù): 13/14頁
文件大?。?/td> 258K
代理商: LM3812
Look-Up Tables
(Continued)
TABLE 2. Duty Cycle to Current Conversion Table
Duty Cycle
(%)
95.5
92.5
90.0
87.5
85.0
82.5
80.0
77.5
75.0
72.5
70.0
67.5
65.0
62.5
60.0
57.5
55.0
52.5
50.0
Sense Current
(Amps)
0.990
0.935
0.880
0.825
0.770
0.715
0.660
0.605
0.550
0.495
0.440
0.385
0.330
0.275
0.220
0.165
0.110
0.055
0.000
Duty Cycle
(%)
50.0
47.5
45.0
42.5
40.0
37.5
35.0
32.5
30.0
27.5
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
Sense Current
(Amps)
-0.000
-0.055
-0.110
-0.165
-0.220
-0.275
-0.330
-0.385
-0.440
-0.495
-0.550
-0.605
-0.660
-0.715
-0.770
-0.825
-0.880
-0.935
-0.990
*
Maximum Sense Current = 1.0 Amps for LM3812-1.0 and LM3813-1.0.
The sense current should be multiplied by 10 for LM3812-7.0 and LM3813-7.0.
Timing Diagram
DS100122-11
Duty cycle of the PWM waveform during any sampling interval indicates the current magnitude (average) and direction during the previous sampling interval.
FIGURE 9. Typical Timing Diagram for Mostly Positive Current
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