LM3812MX-7.0 National Semiconductor, LM3812MX-7.0 Datasheet - Page 12
![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
www.national.com
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
*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.
Sense Current
(Amps)*
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
TABLE 1. Current to Duty Cycle Conversion Table
Duty Cycle
95.5
93.2
90.9
88.6
86.4
84.1
81.8
79.5
77.3
75.0
72.7
70.5
68.2
65.9
63.6
61.4
59.1
56.8
54.5
52.3
50.0
(%)
12
quantization error of
Please see the “PWM Output and Current Accuracy” section
for more details.
Sense Current
(Amps)*
-1.00
-0.95
-0.90
-0.85
-0.80
-0.75
-0.70
-0.65
-0.60
-0.55
-0.50
-0.45
-0.40
-0.35
-0.30
-0.25
-0.20
-0.15
-0.10
-0.05
-0.00
1
⁄
2
bit is not shown in these tables.
Duty Cycle
13.6
15.9
18.2
20.5
22.7
25.0
27.3
29.5
31.8
34.1
36.4
38.6
40.9
43.2
45.5
47.7
50.0
11.4
(%)
4.5
6.8
9.1