LM3812MX-7.0 National Semiconductor, LM3812MX-7.0 Datasheet - Page 13
![IC CURRENT GAUGE 4% 8SOIC](/photos/6/56/65640/pkg_m08a_sml.jpg)
LM3812MX-7.0
Manufacturer Part Number
LM3812MX-7.0
Description
IC CURRENT GAUGE 4% 8SOIC
Manufacturer
National Semiconductor
Datasheet
1.LM3813M-7.0NOPB.pdf
(14 pages)
Specifications of LM3812MX-7.0
Function
Current Gauge
Sensing Method
High-Side
Accuracy
±4%
Voltage - Input
2 ~ 5.25 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
For Use With
LM3812EVAL - BOARD EVALUATION LM3812
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Other names
*LM3812MX-7.0
Timing Diagram
Duty cycle of the PWM waveform during any sampling interval indicates the current magnitude (average) and direction during the previous sampling interval.
*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.
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
(%)
FIGURE 9. Typical Timing Diagram for Mostly Positive Current
TABLE 2. Duty Cycle to Current Conversion Table
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
13
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
-0.165
-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
-0.110
10012211
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