LM3813M-7.0/NOPB National Semiconductor, LM3813M-7.0/NOPB Datasheet - Page 12
![IC CURRENT GAUGE 4% 8SOIC](/photos/6/56/65640/pkg_m08a_sml.jpg)
LM3813M-7.0/NOPB
Manufacturer Part Number
LM3813M-7.0/NOPB
Description
IC CURRENT GAUGE 4% 8SOIC
Manufacturer
National Semiconductor
Datasheet
1.LM3813M-7.0NOPB.pdf
(14 pages)
Specifications of LM3813M-7.0/NOPB
Function
Current Gauge
Sensing Method
Low-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
LM3813EVAL - EVALUATION BOARD FOR LM3813
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Other names
*LM3813M-7.0
*LM3813M-7.0/NOPB
LM3813M-7.0
*LM3813M-7.0/NOPB
LM3813M-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